Book Num Ans Question Answer A Answer B

Book Num
Ans
11
1
B
11
2
D
11
3
B
11
4
B
11
5
Question
Answer A
The shaft coupling for the pump illustrated is prevented lacing wire
from rotating on the shaft by a __________.
key
Tubing is sized by __________.
cross-section area
Which line on the graph shown in the illustration
indicates latent heat of fusion?
Short cycling of a refrigeration compressor refers to
__________.
The emergency bilge suction valve is typically used
__________.
D
11
6
B
11
7
D
11
8
B
11
9
A
11
10
B
11
11
D
11
12
C
11
13
D
11
15
C
11
16
D
allowed working
pressure
Line 1
frequently grounding
out
to inject cleaning
additives when the
bilges are extremely
dirty
Answer B
Answer C
set screw
Answer D
lock washer
GS-0143
Line 2
frequently starting
and stopping
when the main
condenser becomes
fouled, in order to
provide additional
cooling water
circulation
nominal inside
diameter
Line 3
nominal outside
diameter
Line 4
running too fast
running too slow
to connect the rose
box to the
independent bilge
suction
if the bilges become
flooded and they can
not be emptied by
any other means
The by-products of oxidation, as a result of water
contamination of hydraulic oil, are generally
__________.
removed by cellulose gums, varnishes, and always neutralized by harmless and have
type filters
acids
oil additives
no effect on system
components
A record of the types and strengths of steels used on a
MODU must be included in the __________.
Which of the fittings listed should be used for the
installation of new water pump piping to permit removal
of the pump for servicing?
A continuous watertight bulkhead on a MODU may also
be a/an __________.
Which of the following describes the purpose of a
striker or doubler plate?
general plans
A high reading at a salinity cell located in the loop seal
between two stages of a flash type evaporator would
indicate __________.
Regarding MODU construction, bulkheads in the
quarters are generally __________.
In machine shop practice, a center gage is used for
checking the angle of __________.
A portion of the cargo of an LNG carrier boils off during
each voyage. How is the cargo boil off normally
handled?
Air leaking into a flash type distilling plant could occur
through __________.
Coupling
builder's
documentation
Union
Certificate of
Inspection
Quick disconnect
Nipple
structural bulkhead
exterior bulkhead
centerline bulkhead
joiner bulkhead
Provides a surface
for the application of
force, or the
installation of
machinery.
chill shocking is
necessary to remove
scale
structural
Provides landing
surface for the
sounding bob of a
tank sounding tape.
Absorbs machinery
vibration.
Prevents valve stem
over travel.
leakage at the
second-stage
condenser
watertight
faulty operation of
the brine overboard
pump
non-structural
carryover in the firststage
drill points
screw threads
screw thread pitch
Compressed,
condensed, and
return to the cargo
tanks.
gasketed joints
Vented to the
atmosphere.
1
Illustr
valve stems
construction portfolio
continuous
60° thread cutting
tools
Burned in the boilers. Mixed with nitrogen
and recirculated
through the primary
barrier.
gage glass packing all of the above
SG-0001
Book Num
11
18
C
Question
Answer A
The construction portfolio may be included as part of
general plans
the MODU __________.
Which of the following statements represents the proper Direction of flow
relative direction of flow through a globe valve?
through the valve is
unimportant.
11
19
B
Vertical partitions providing strength and
compartmentation on a MODU are called __________.
11
20
A
11
17
Ans
B
11
21
B
11
22
D
11
23
B
11
24
C
11
25
C
11
26
B
11
27
C
11
28
A
11
29
C
11
31
D
decks
Answer B
operating manual
Direction of flow
through the valve
depends upon the
type of seat design
used in the valve.
bulkheads
Answer C
builders
documentation
Direction of flow
should be from below
the seat.
Answer D
Coast Guard file
joiner work
walls
Direction of flow
should be from
above the seat.
The shaded portion of the diagram shown in the
discharge manifold
illustration represents a __________.
The illustrated drawing shows a correct front "F" and top 1
"T" view of an object. Of the views labeled "1","2","3",
and "4", the one that correctly represents the right side
view for a third angle projection is __________.
suction line
bilge system
vacuum branch line
2
3
4
Which of the listed types steam traps operates on the
principle that hot water flashes to steam when its vapor
pressure is rapidly reduced?
The lathe tool shown as "Q" in the illustration is a
__________.
The heat gained per pound of refrigerant in the
evaporator is known as the __________.
A squealing sound occurring from within an operating
reciprocating air compressor is an indication of
__________.
A mooring winch should be equipped with mechanical
brakes capable of holding __________.
Ball float
Thermostatic
Bimetallic
Impulse
cutting-off tool
left hand side facing
tool
sensible heat
right hand turning
tool
refrigerating effect
universal turning tool
The requirements for special welding procedures to be
used on a MODU must be contained in the
__________.
The trap illustrated operates as a __________.
the full breaking
strength of the
mooring line
Coast Guard file
thermostatic bellows thermodynamic
type steam trap
impulse type steam
trap
Bulkheads forming part of the tanks on a MODU are
deck loads from
stiffened to withstand __________.
above
Of the views labeled "1", "2", "3", and "4", select the one 1
that correctly represents the right side view of the
unnumbered object in the illustration.
2
GS-0125
GS-0132
latent heat of
vaporization
compressor overload motor overload
half the breaking
strength of the
mooring line
vessel plans
Illustr
tight compressor
bearings
the maximum
expected tension of
the mooring line
construction portfolio
GS-0090
specific heat of
vaporization
badly leaking
unloaders
50% over the
working tension of
the mooring line
Certificate of
Inspection
thermostatic bithermodynamic float
metallic bellows type type steam trap type
steam trap
steam trap
GS-0005
dynamic forces while hydrostatic pressure over pressurization
afloat
2
3
4
GS-0003
Book Num
Ans
11
32
A
11
34
B
11
35
D
11
37
C
11
38
D
Question
The operation of a thermostatic steam trap depends
upon the __________.
Answer A
Answer B
thermal expansion of position of a float
a fluid
The process of removing moisture from air is known as
__________.
The relative position of the journal and bearing at
operating speed is illustrated by figure __________.
humidification
dehumidification
Answer C
Answer D
tendency of hot water flow characteristics
to flash into steam
of a liquid as it
passes through an
orifice
vaporization
evaporation
A
B
C
The reading on the micrometer scale shown in figure
"B" in the illustration is __________.
Which of the following describes the function of the air
receiver in the compressed air system on a MODU?
0.565 inch
A centrifugal bilge pump requires priming __________.
11
11
11
40
41
42
B
A
A
11
44
D
11
45
A
11
46
A
11
47
C
11
48
B
D
GS-0121
0.655 inch
Condenses moisture. Provides
overpressure
protection.
primarily to lubricate due to the inability of
the shaft seals
this type of pump to
lift water to cover the
suction (eye) of the
impeller
0.680 inch
0.750 inch
Purifies the air.
Acts as an
accumulator.
to initially unload the
pump by having its
head pressure equal
to discharge
pressure
in order to overcome
the potential energy
of water in the
discharge line
drain line from a high
point in the main
steam line expansion
loop
vacuum drag line
from the atmospheric
drain tank to the
main condenser
A suitable location for the installation of an impulse type horizontal run of
steam trap would be in the __________.
drain line from the
lowest point at the
outlet of the heat
exchanger
Which of the listed conditions can lead to cavitations in Vapor pockets
a centrifugal pump?
formed in the suction
flow stream.
steam supply line to
a feedwater heater
Rough casing volute Worn wearing rings.
surfaces.
Partial restriction in
the discharge valve.
Coast Guard Regulations (46 CFR) require refrigerated the chief steward's
spaces that can be locked from the outside and cannot berthing quarters
be opened from the inside to have an audible alarm to
sound in __________.
The method of framing shown in the illustration utilizes transverse
the type of construction termed __________.
the galley
the wheelhouse
a manned location
web
Isherwood
longitudinal
The hydraulic oil most likely to thin out when hot and
thick when cold would have a viscosity index of
__________.
The decks of a MODU are supported by transverse
members called __________.
Why is electrical power preferred over mechanical
power for driving heavy machinery on drilling rigs?
Illustr
GS-0086
20
40
60
80
trusses
deck longitudinals
deck beams
web frames
More fuel efficient.
More flexible.
Lighter.
Less maintenance.
3
GS-0081
Book Num
11
49
C
Question
Answer A
On a MODU, the keel is the primary strength member of Transverse
the lower hull form and is laid in which direction?
Water flinger
Drain hole
Lantern ring
50
B
How is water traveling along the shaft of a centrifugal
pump prevented from entering the shaft bearing?
Shaft seal
11
11
51
A
Which drawing view or projection is shown in the
illustration?
Which of the following descriptions best identifies the
operating principal of a flash-type evaporator?
cross-sectional
orthographic
isometric
oblique
Sea water is heated
to boiling
temperature while
under a vacuum.
cooling only
Sea water is passed Heated sea water is
over heated plates in injected into a
a thin film.
vacuum chamber.
Sea water is forced
through a heated
eductor.
cooling and
humidifying
cooling and
dehumidifying
adiabatic cooling
the flash point
the fire point
All of the above.
areas where special
materials are used
hazardous areas
Absorb erosion of
high velocity
discharge stream.
Seal pump shaft
against entry of air.
the autogenous
ignition point
location of
emergency repair
equipment
Isolate the discharge
side from the suction
side.
stanchions
brackets
web frames
deck stringers
a balance chamber
an electronic sensing all of the above
line
78 kips
128 kips
11
52
Ans
C
11
54
C
11
56
D
11
57
A
11
58
C
11
59
A
11
60
B
11
61
D
11
62
C
11
63
C
11
64
A
11
65
D
If air at 95° F dry bulb temperature and 50% relative
humidity is conditioned to 75° F dry bulb temperature
and 50% relative humidity, it is an example of
__________.
The volatility of any oil may be indicated by
__________.
A simplified construction plan may be included in the
MODU construction portfolio provided it adequately
defines the __________.
What is a function of the wearing rings used in most
centrifugal pumps?
Between the side frames of a MODU, support for the
deck beams is provided by __________.
A pneumercator tank gage utilizes __________.
a Bourdon tube
indicator
A tank of a MODU, with a volume of 2,000 cubic feet, is 54 kips
pressed up with sea water weighing 64 pounds per
cubic foot. What is the weight, in kips, of the liquid?
For MODU's operating under the U.S. flag, the
construction portfolio must contain __________.
The lathe tool shown as figure "B" in the illustration is
called a __________.
When liquid reaches the compressor of a refrigeration
system through the suction line, the condition is called
__________.
In the illustration, item "5" represents a __________.
Answer B
Diagonal
Answer C
Longitudinal
Answer D
Vertical
67 kips
Dampen the
turbulent discharge
flow.
recycling
diaphragm pump
centrifugal pump
4
positive
displacement pump
GS-0001
type and strength of
materials used
detailed construction chemical and
approved welding
plans
physical properties of procedures and
ABS approved steels welding test
procedures
right hand roughing cutting-off tool
round nose turning
tool
tool
flooding back
superheating
overflowing
rotating vane pump
Illustr
loading conditions
and limitations
left hand facing tool
GS-0009
GS-0125
Book Num
11
66
Ans
B
11
67
A
11
68
C
11
69
C
11
71
D
11
72
A
11
73
D
11
74
C
11
75
B
11
76
C
11
77
C
11
78
A
11
79
D
11
80
C
Question
The term 'pour point' is defined as the lowest
temperature at which lubricating oils will flow
__________.
Answer A
rapidly
In the MODU construction portfolio, materials which do
not conform to ASTM or ABS specifications must also
include the __________.
chemical and
name of the
physical properties of alternative standard
the material
or specification
The part labeled "A" of the illustrated bearing is called
thrust ring
the __________.
Deck beams on a MODU are generally spaced at equal longitudinally
intervals and run __________.
An acetylene pressure regulator should never be
the relief valve will lift
adjusted to maintain pressures exceeding 15 psig
(103.4 kPa) because __________.
Answer B
by gravity
Answer C
through a standard
orifice at a specified
temperature
Answer D
at a rate of 60cc per
second
manufacturer or
origin of the material
outer race
the ASTM or ABS
specification the
material
approximates
inner race
cage
vertically
transversely
intermittently
the fusible plug will
blowout
rapid depletion of
acetylene is
hazardous
this gas become
extremely unstable
under this condition
side suction
bottom suction
top suction
The suction nozzle classification of the pump shown in
the illustration can best be described as __________.
end suction
Which lathe tool shown in the illustration would best be
used on a work piece to perform a right hand facing
operation?
The pressure range between the system cut-in and cutout pressures in a refrigeration unit is known as
__________.
In the diagram illustrated, the direction of flow through
the check valve is __________.
P
Prior to the burning or welding of a fuel tank on a
MODU, regulations require that an inspection be made.
An entry in the unofficial logbook is required if this
inspection is made by __________.
A welding procedure used for joining dissimilar metals
used in the construction of a MODU would be recorded
in the __________.
The record of tests and inspection of fire fighting
equipment on board a MODU must include
__________.
The deck plating on a MODU is supported primarily by
deck longitudinals and deck __________.
a marine chemist
the Officer in Charge, the Master or person the National Fire
Marine Inspection
in charge of the
Protection
MODU
Association
welding plan
ASTM specifications construction portfolio Coast Guard file
the name of the
person conducting
the test
girders
the weight of the
charge
recommendations for all of the above
the next test
stanchions
frames
beams
The reading on the micrometer scale shown in figure
"A" in the illustration is __________.
0.9180 inch
0.9500 inch
0.9680 inch
0.9910 inch
Illustr
MO-0001
GS-0012
V
Q
R
GS-0090
opposing operational pressure distribution differential
drag
system purge
from right to left
dependent on
discharge pressure
5
from left to right
in either direction
GS-0125
GS-0081
Book Num
Ans
Question
How long must the records of tests and inspections of
fire fighting equipment for a MODU be retained on
board?
The reading on the vernier caliper scale shown in figure
"E" in the illustration is __________.
A reciprocating air compressor is running roughly and
vibrating excessively, indicating that the __________.
Answer A
Six months
Answer B
One year
Answer C
Three years
3.360 inches
3.610 inches
3.925 inches
compressor is
overloaded
motor is overloaded
foundation bolts are
loose
belts are too tight
moisturizing
dehumidification
dampening
humidification
11
81
C
11
82
A
11
83
C
11
84
D
11
85
A
Increasing the moisture content of conditioned air is
known as __________.
The master or person in charge of a MODU is required
to log __________.
86
C
In a radial piston pump, reversal and control of fluid flow central valve
are accomplished by moving the __________.
radial plunger
11
What must be entered in the unofficial logbook by the
master or person in charge of a mobile offshore drilling
unit after conducting a fire drill?
The condition of all
fire fighting
equipment,
watertight door
mechanisms, and
valves used during
each drill.
The name of each
The location of the
unit at the time each crew member who
drill is conducted.
participated in the
drill and their
responsibilities.
After conducting a boat drill, the master or person in
charge of MODU shall log __________.
the names of crew
members who
participated in the
drill
The deck loads on a MODU are distributed through the
deck beams to the __________.
One cause of leaky valves in a low pressure air
compressor may be attributed to __________.
frames
the length of time
that each motor
propelled lifeboat
was operated in the
drill
hull
running with an air
filter element
different from that
required by the
original
manufacturer's
specifications
To maintain design discharge pressure from a
centrifugal pump, the design clearance must be
maintained between the __________.
In the illustration shown, what is the distance indicated
by dimension "I"?
11
87
A
11
88
B
11
89
A
11
90
B
11
91
C
11
92
B
the date and hour of the names of all
each fire drill
persons on board
Answer D
Until the next
inspection for
certification
4.360 inches
GS-0082
only casualties which every event occurring
occur while
on board
underway
floating ring
cylinder body
All of the above.
the length of time the the time it took to
lifeboat was in the
lower the boat
water
stringers
plates
excessive operating
hours without
carrying out
preventive
maintenance
the compressor
running too fast
excessive discharge
pressure
shaft and impeller
motor and pump
shaft
casing and impeller
wearing rings
lantern ring and
impeller
1 1/2 inches
1 3/4 inches
1 7/8 inches
2 inches
6
Illustr
GS-0001
Book Num
Ans
11
93
B
11
94
D
11
95
A
11
96
A
11
97
B
11
98
C
11
99
A
11
101
D
11
102
B
11
103
C
11
104
C
11
105
A
Question
Answer A
Which of the following statements represents the
The jaws on the
difference between a four-jaw independent chuck and a three-jaw chuck can
three-jaw universal chuck?
be individually
adjusted.
Answer B
Answer C
The jaws on the four- The three-jaw chuck
jaw chuck can be
will hold square,
individually adjusted. round, and irregular
shapes in either a
concentric or an
eccentric position.
Answer D
Since the three-jaw
universal chuck is
automatically selfcentering, it is always
more accurate than
the four-jaw
independent chuck.
Enlarging one tube end so the end of another tube of
the same size will fit inside is termed __________.
belling
stretching
flaring
swaging
Stern tube and strut bearings lined with hardwood or
rubber composition materials are lubricated with
__________.
The purpose of annealing any metal is to make the
metal __________.
When the longitudinal strength members of a MODU
are continuous and closely spaced, the vessel is
__________.
Lifeboat winches on a MODU are required to be
inspected and an entry made in the logbook. What
should this entry include?
saltwater
graphite
light lubricating oil
heavy lubricating oil
softer
smoother
harder
tougher
transversely framed
longitudinally framed intermittently framed web framed
A fluctuating and unsteady vacuum in an evaporator
may be caused by __________.
If a radial piston hydraulic pump fails to deliver rated
fluid volume, the cause can be __________.
Pipe threads are cut with a taper to __________.
When the tilting box of a variable stroke axial-piston
pump is perpendicular to the pump shaft, which of the
following conditions will exist?
Which of the refrigerants listed is considered ideal for
most marine applications?
The dual pressure-temperature regulator, shown in the
illustration, is adjusted by turning the stem "L" clockwise
(as viewed from the top) and the adjusting ring "B"
counterclockwise (as viewed from the top). This will
result in __________.
The time required to The time required to The date of
lower a lifeboat.
raise a lifeboat.
inspection and
condition of the
winch.
wet steam entering pinhole leaks in the rapid scaling on the
evaporator tube
the air ejector nozzle evaporator tube
nests
nests
contaminated fluid
pitted thrust rings
worn pintle bearings
All of the above.
high water levels in
the last effect
prevent over
tightening the joint
The pistons
reciprocate.
obstructed suctions
passage
provide a leak proof permit easy joint
produce a fine even
fit
disassembly
thread
The "B" end cylinder There is no fluid flow. Power is transmitted
barrel rotates.
hydraulically.
Carbon dioxide
Ammonia
R-22
a higher outlet
pressure, with a
higher controlled fluid
outlet temperature
a lower outlet
pressure, with a
corresponding
decrease in the
controlled fluid outlet
temperature
a higher outlet
no change
pressure with a lower
fluid outlet
temperature
7
Illustr
Sulfur dioxide
GS-0045
Book Num
Ans
11
107
B
11
109
B
11
110
A
11
111
D
11
112
C
11
113
C
11
114
C
11
115
A
11
116
B
11
117
A
11
118
B
11
119
A
11
121
C
11
122
D
11
123
A
Question
Closed impellers differ from open impellers in that
closed impellers __________.
Answer A
allow liquid to enter
the eye from one
direction only
A MODU having continuous closely spaced transverse
strength members is __________.
With respect to centrifugal pump design, which of the
following descriptions best represents a pump utilizing
two impellers?
What is the length of the stud used to secure the
packing gland shown in the illustration?
Which of the listed pipe sizes is not commonly used?
longitudinally framed transversely framed
cellular framed
web framed
Multistage
Axial flow
Dual coupled
Parallel flow
1 inch
1 1/4 inches
1 1/2 inches
2 1/2 inches
3/8 inch
1/2 inch
5/8 inch
3/4 inch
As shown in the illustration, the maximum shaft
diameter is __________.
When using a sling psychrometer to determine relative
humidity, the indicated difference between the dry bulb
and the wet bulb reading is the __________.
0.562 inches
0.622 inches
0.625 inches
0.628 inches
relative humidity
dew point
wet bulb 'depression' partial saturation
temperature
The static positive suction head of a pump is the
__________.
distance of the
suction liquid level
above the center line
of the pump
distance the suction
liquid level is below
the center line of the
pump
force necessary to
overcome frictional
losses in the pump
and piping
has a high grease
penetration number
(is hard)
indicates the quantity
of energy released
by burning a unit
amount of the fuel
is thinned with a
suitable lubricating
oil
is useful for
determining proper
atomization
temperatures
30 inches
24 inches
15 inches
beam
stiffener
stanchion
4.715 inches
4.340 inches
5.925 inches
A 3/4" pipe with an
extra strong wall
thickness.
2.650 inches
A 3/4" pipe with a
double extra strong
wall thickness.
3.125 inches
All have the same
outside diameter.
A grease lubricated ball bearing or roller bearing will run fills only 10% of all
cooler if the grease __________.
void spaces within
the bearing
The ash content of a fuel oil is significant to the
is an indication of the
operating engineer because it __________.
amount of
noncombustible
material present in
the oil
What is the diameter of a cylinder whose cross36 inches
sectional area is 706.86 square inches?
On a MODU, the deck stringer is the outboard most
plating
deck __________.
The reading on the vernier caliper scale shown in figure 4.015 inches
"C" in the illustration is __________.
Which pipe listed has the largest outside diameter?
A 3/4" pipe with a
standard wall
thickness.
The reading on the vernier caliper scale shown in figure 2.505 inches
"F" in the illustration is __________.
8
Answer B
Answer C
have side walls
have small impeller
eyes
which extend from
the eye to the outer
edge of the vane tips
Answer D
are not vented above
the impeller eye
Illustr
GS-0012
GS-0016
amount in inches of
mercury the total
suction head is
below atmospheric
pressure
is heated prior to
packing the bearing
reflects the overall
thermal efficiency of
the fuel oil service
system
3.210 inches
GS-0082
GS-0082
Book Num
Ans
11
124
A
11
125
B
Question
Answer A
The sum of the sensible heat and the latent heat of any total heat
substance is known as __________.
Expansion of the tube bundle in a shell-and-tube type
packing and lantern
cooler may be provided for by the __________.
rings
11
126
C
The pressure produced within the oil wedge of a
rotating journal is __________.
11
127
C
11
128
B
11
129
A
11
130
C
11
131
D
11
132
C
11
133
A
11
134
A
11
135
B
Answer B
residual heat
Answer C
specific heat
Answer D
superheat
floating end tube
sheet
shell foundation bolts directional transverse
baffles
the same as the
pressure in the
lubricating system
The reading indicated on the micrometer scale shown in Figure A
the illustration is .3350 inches. Which of the figures
listed represents this reading?
Which combination of the main shaft segments listed
Line shaft and thrust
below, that are located furthest from the main engine,
shaft
are connected by the inboard stern tube shaft coupling?
less than the
pressure in the
lubricating system
Figure B
greater than the
pressure in the
lubricating system
Figure C
Line shaft and stern- Thrust shaft and
tube shaft
stern-tube shaft
Stern-tube shaft and
tail shaft
Compared to internal structural plating, the exterior hull stronger
plating on a MODU is usually __________.
thinner
more corrosion
resistant
a lower grade steel
Illustr
highest at the oil
groove location
Figure D
GS-0081
The gasket and the broken studs have been replaced
on a tank manhole cover. Which of the following
methods is satisfactory for testing the repair?
Pressurize the tank
with 10 psig air, soap
the repaired area,
watch for visible
signs of leakage or
bubbles.
Fill the tank with
water via the ballast
pump until the
innage reading
corresponds to the
maximum depth of
the tank.
Hose test the
repaired area with a
minimum of 100 psig
water pressure.
Fill the tank via the
ballast pump until
water flows from the
vent line opening on
deck.
What is the distance between the center of the
discharge outlet and the top of the motor illustrated?
34 5/8 inches
35 inches
35 5/8 inches
36 inches
Piping cross-sections over 12 inches in diameter are
sized by the __________.
The static suction lift of a pump is the difference in
elevation between the __________.
inside diameter
wall thickness
outside diameter
threaded diameter
centerline of the
pump and the level
of the liquid in the
suction well when the
source of liquid is
below the pump
centerline of the
pump and the
suction liquid level
when the source of
liquid is above the
pump
centerline of the
pump and the level
of the discharge
liquid
liquid levels of the
suction and
discharge
latent heat
total heat
residual heat
42.40
48.60
54.80
GS-0011
The heat identified by only a change in temperature is
sensible heat
known as __________.
Referring to the table shown in the illustration, your
36.20
vessel has just taken aboard 30,000 gallons of fuel with
an API gravity of 35.2 at 60° F. Your vessel's specific
fuel consumption at full power is 0.5 lbs. per Hp-Hr.
How many hours will the fuel last?
9
GS-0149
Book Num
Ans
11
137
B
11
138
C
11
139
A
11
140
B
11
141
D
11
142
B
11
143
B
11
144
B
11
146
C
11
147
A
11
11
148
149
Question
Answer A
177.76
A fuel tank on your vessel is 20 feet high, 20 feet long
and 20 feet wide. If it is filled 100% with fuel having an
API gravity of 35.7 at a temperature of 60° F, how many
long tons of fuel are in the tank?
The usual number of single-acting pistons used in a
3 or 5
variable stroke axial-piston pump is __________.
Answer B
188.25
5 or 7
7 or 9
9 or 11
Which device shown in the illustration should be used
to check valve clearances in a diesel engine fitted with
solid lifters?
Regarding the oil cooler shown in the illustration, the
purpose of the internal shell baffles is to __________.
B
C
D
In the pump shown in the illustration, what is the
distance from the bottom of the inlet to the bottom end
of the motor shaft?
Piping cross-sections ranging from 1/8 inch to 12 inches
in diameter, are sized by __________.
An axial piston pump differs from a radial piston pump
as the pistons of an axial piston pump are positioned
__________.
In reference to air conditioning, when air attains the
maximum amount of moisture it can hold at a specific
temperature, it is said to be __________.
Positive displacement, helical gear pumps are well
suited for pumping oil because __________.
A
Answer D
210.84
Illustr
GS-0149
GS-0073
allow the water to
make four passes
over the tubes
allow the oil to make prevent oxidation and
four passes over the coking of the lube oil
tubes
as it passes through
the cooler
prevent erosive tube
failure due to highvelocity flow in the
core
45 1/4 inches
45 5/16 inches
57 5/8 inches
53 5/8 inches
GS-0122
GS-0011
wall strength
radially from the
shaft
superheated
stuffing boxes
eliminate the leakage
problems usually
associated with other
gear pumps
nominal inside
outside diameter
diameter
parallel to each other parallel to each other
and to the shaft
but at a right angle to
the shaft
saturated
condensed
it is not necessary to
closely maintain
design clearances
with this pump
they are essentially
self-priming and
capable of a high
suction lift
threaded diameter
at an angle to each
other and to the shaft
convected
these pumps are
designed with
extreme tooth angles
The conical steel or composition cone installed on a
Reduce turbulence
propeller, known as a fairwater cone, provides which of
the following benefits?
The exposed portion of the outboard propeller shaft is
a heavy lubricant
protected against seawater corrosion by __________.
Help with lubrication Protect against
All of the above
electrolytic corrosion
Why are removable sleeves installed on centrifugal
pump shafts?
They can be
economically
replaced as they
wear out.
B
B
Answer C
196.47
They make it easier
to replace the pump
shaft packing.
10
a covering of plastic, a corrosion-resistant a layer of oxidation
rubber, or shrunk-on paint
formed when the
composition sleeve
metal of the shaft is
exposed to seawater
They can be
removed when it is
necessary to lighten
the weight of the
pump.
They increase the
strength of the shaft.
Book Num
Ans
Question
In order for the reducing valve, shown in the illustration,
to properly function, a control port is utilized between
__________.
A good quality oil used in main propulsion engine
lubrication systems should be __________.
Answer A
the underside of
diaphragm "E" and
the outlet
free from all chemical
additives
Answer B
Answer C
the inlet side and the the underside of
outlet side
diaphragm "E" and
the inlet
quickly chemically
resistant to
oxidized
permanent
emulsification
saturated
condensing
superheated
Answer D
the top of piston "H"
and the outlet
evaporating
Reciprocating pump
Circulated hot water
heating
Centrifugal pump
Electric element
heater
High pitch rotary
vane pump
Forced hot air
heating
Eductor pump
11
150
A
11
153
C
11
154
B
11
155
A
11
156
C
When air at a given temperature, contains the
maximum amount of moisture for that temperature, the
air is said to be __________.
Which type of space heating systems is shown in the
illustration?
Which of the listed types of pumps is NOT likely to be
installed in a main drainage or evacuation system?
spring force
a pressure gun
a zero fitting
158
B
In a compression type automatic grease cup, the
lubricant is forced into the bearing by __________.
gravity flow
11
11
159
C
The term referring to the number of teeth per inch on a
hacksaw blade is known as the __________.
The valve shown in the illustration uses port "J" to
__________.
set
rake
pitch
thread gauge
open the auxiliary
valve
open the main valve bleed off
downstream
pressure beneath the
operating piston
11
160
D
11
161
D
11
162
B
11
164
D
11
165
C
11
166
D
Steam heating
Illustr
GS-0044
readily saponified
with water
allow downstream
pressure to be
sensed by
diaphragm "E"
GS-0150
GS-0044
In the illustration shown, the notation 1/8"R indicates a
one-eighth inch __________.
recess on one end of rough finish on both
the tool
ends of the tool
45° Chamfer on both radius on one end of
ends of the tool
the tool
GS-0016
Which of the following statements represents the
advantage of rotary pumps as compared to
reciprocating pumps?
The high discharge
pressure of the rotary
pumps permits a
larger volume of fluid
per unit time than the
reciprocating pump.
Rotary pumps are
capable of pumping
more fluid than
reciprocating pumps
of the same weight.
Rotary pumps
occupy only one-half
the space of
reciprocating pumps.
Which of the following terms represents the form of heat
removed from the refrigerant in the condenser of a
refrigeration system?
Which of the devices listed should be used to reshape a
grinding wheel?
Water leaking through the stern tube stuffing box is
used to accomplish which of the following actions?
Latent heat of
vaporization
Heat of compression Superheat
A round nose tool
An oil stone
A wheel dressing tool A sharp nose tool
Cooling
Lubrication
Flushing
11
Rotary pumps
eliminate discharge
slippage of the
pumped liquid, while
this does not hold
true for a
reciprocating pump.
All of the above
All of the above
Book Num
11
167
Ans
B
Question
Water hammer in a steam heating system can be
caused by __________.
Main propulsion engine lube oil sumps should be
constructed __________.
11
168
B
11
169
A
11
170
D
11
171
A
11
172
D
11
173
C
11
174
C
11
175
C
11
176
C
11
177
D
11
178
D
A major controlling factor in the location of the
condensate return piping from a heating system is/are
__________.
If the existing vapor pressure is subtracted from the
indicated pressure at the pump suction, the remainder
is the __________.
The reading indicated on the micrometer scale shown in
the illustration is .9680 inches. Which of the figures
listed represents this reading?
A first stage unloader installed in a low pressure air
compressor is unable to completely retract. This will
result in __________.
Items #68 and #78 as shown in the pump illustration are
identified as the __________.
The heat removed from the refrigerant in the condenser
of a refrigeration plant is the __________.
Answer A
Answer B
filling the auxiliary
steam admitted to a
boiler with cold water cold pipe
Answer C
filling the auxiliary
boiler with hot water
Answer D
draining a soot
blower line before
cracking the steam
supply valve
so as to never be
with a sloped bottom only of nonferrous,
with drain/return lines
integral with the main
non-corrosive metals terminating just
engine foundation
above or at the
designed normal
level
the requirement for a the requirement for the requirement to
all of the above
gravity return
short laterals run
minimize conflict with
headroom and other
services
pump head
total suction head
discharge head
apparent net positive
suction head
Figure A
Figure C
Figure B
Illustr
Figure D
GS-0081
overheating of the
discharge valve
shaft keyways
loss of moisture in
the air charge in the
receiver
wearing rings
latent heat of
expansion
sensible heat of
condensation
The discharge side of the pump illustrated is identified A
by the letter '__________.'
When conducting a hydrostatic test on the distillate
reroll the tube
cooler shell of a flash type evaporator, liquid appears
well inside one of the tubes. In order to correct this, you
should __________.
all of the above
B
C
D
seal weld the tube
plug the tube
all of the above
would be considered
satisfactory as a
temporary repair until
permanent repairs
may be conducted
low pressure fluid
flow through the
pipeline
Hydraulic oil film
breakdown.
a scored valve stem
Excessive leakage and premature failure of valve
packing is a result of __________.
opening a valve too
quickly
jamming a valve in
the closed position
Which of the following problems may be encountered
by using an oil having a viscosity higher than that
specified for an operating hydraulic system?
External seal
leakage.
Hunting due to fast
response.
12
an abnormally low
intercooler pressure
frequent lifting of the
intercooler relief
valve
bearing retainers or
spacers
heat of compression
journal bearings
Increased power
consumption.
GS-0143
GS-0129
Book Num
Ans
11
179
C
11
180
B
11
182
D
11
183
B
11
184
D
11
185
B
11
186
D
11
187
B
11
188
B
11
189
C
11
190
B
11
191
B
11
192
A
Question
Water leaking from a pump packing gland is kept away
from the bearing housing by the use of __________.
Answer A
shaft sleeves
Answer B
lantern rings
Answer C
water flingers
Answer D
water seals
An inadequate reciprocating bilge pump discharge is
most often caused by __________.
Which of the listed problems could produce a high
absolute pressure within a flash type evaporator?
defective intake
valves
production of high
salinity distillate
clogged suction
strainers
seawater feed
temperature below
165° F
An increase in the
viscosity of the oil
scarred cylinder
walls
a leak in the first
stage demister
clogged drain valves
A change in the
cloud point
A change in the floc
point
twice the dry bulb
temperature
lower the center of
gravity of the ship
A casing drain is provided for axial piston and bent axis vent off any
variable stroke pumps to __________.
accumulated air from
the system
10° F above the dry
bulb temperature
reduce the amplitude
of roll
drain off any
accumulated water
from the pump
casing prior to its
being started
5° F above the dry
bulb temperature
reduce pitching
equal to the dry bulb
temperature
reduce yawing
assist the complete
removal of hydraulic
oil from the system
prior to opening for
major or minor
repairs
prevent damage due
to agitation and
overheating of oil
accumulated in the
casing as a result of
normal internal
leakage
Before the longitudinal carriage feed of a lathe is
engaged, you must be certain the __________.
Increasing the speed of a rotary pump above its rated
speed will result in which of the following conditions to
occur?
The function of lubricating oil is to __________.
spindle clutch is
disengaged
Loss of suction
carriage clamp screw carriage stop clamp
is loosened
is tightened
Increased clearances Decreased
clearances
maintain even
distribution of
bearing wear
maintain a constant
oil temperature
Which of the following conditions should be used to
A decrease in the
support the need to change the lube oil when there has viscosity of the oil
been an increase in the neutralization number?
The dew point of air is reached when the wet bulb
temperature is __________.
The purpose of bilge keels is to __________.
Which of the devices listed is used to maintain a snug
notch and keyway
interface between the rotating and stationary seal
members shown in the illustration?
The illustration is drawn to a scale of 3/8 inch = 1 inch. 1.625 inches
What is the full size dimension of "X", if the scale
lengths for "E" = 5/8", "F" = 1 3/8", "G" = 2 1/8", and "H"
= 5 3/4"?
The tendency for lubricating oil to thin out at high
low viscosity index
temperatures and thicken at low temperatures will be
characterized by a __________.
13
spring
Illustr
a cracked distillate
pump vent line
thread dial indicator
is zeroed
Decreased slippage
maintain a
remove entrained
pressurized fluid film water
between moving
surfaces
bellows
seal retaining ring
GS-0071
4.333 inches
6.094 inches
15.333 inches
GS-0007
high viscosity index
high neutralization
number
low demulsibility
quality
Book Num
Ans
11
193
B
11
194
A
11
195
B
11
11
11
196
197
198
A
B
D
11
199
B
11
200
C
11
201
B
11
202
A
11
203
D
11
204
A
Question
After packing is added to the stern tube stuffing box,
which of the following procedures should be observed
to insure even tightening of the gland?
Answer A
Listen for a smooth,
regular sound.
The temperature at which water vapor in the
atmosphere begins to condense is called the
__________.
One function of the air receiver in a compressed air
system is to __________.
dew point
temperature
If a drill press is used to completely bore through a
metal plate, feed pressure on the drill bit should be
eased as the bit breaks through the bottom of the hole
to prevent __________.
Which of the following statements describes the
purpose of the split inflatable seal installed aft of the
primary seal assembly for the propeller shaft?
dry the air
discharged from the
intercooler
the drill bit from
jamming and
spinning the work
piece
To serve as a seal
when adding packing
to the stuffing box.
Answer B
Measure the
distance between the
gland and the
stuffing box with a
rule.
condensation
temperature
Answer C
Judge by feeling the
gland for an increase
in heat as it is being
tightened up.
minimize the
system's line
pulsations
drilling undersized
holes
receive exhaust air
from pneumatic
accessories
overspeeding the
spindle
To allow repair or
replacement of the
primary seal
elements when the
ship is waterborne.
To protect the
equipment.
To eliminate leakage To provide a ready
via the propeller
means for the entry
shaft when the shaft of cooling water.
is not rotating.
Why should a person who is performing maintenance
on an air compressor, wire and tag the system valves
closed?
To prevent the
unexpected.
With regard to the opening and closing of watertight
appliances not fitted with a remote operating control or
alarm system, which of the following is the master or
person in charge of a MODU required to enter in the
logbook?
One of the main differences between the various types
of screw pumps is in the __________.
The shaft shown in the illustration has an overall length
of 42 inches in addition to the following dimensions of
"A" = 8", "B" = 8", "C" = 10", and "D"=8 3/16" The
tapered length "X" is __________.
In the spring-loaded, steam pressure, reducing valve
shown in the illustration, the high pressure steam
__________.
The time required to The reason for
close the appliances. opening or closing
each appliance.
stuffing box diameter direction of rotation
of the screws
6.375 inches
7.812 inches
psychometric
temperature
Answer D
Open the drain
connection to allow
seawater to flow in
and make the
distance even.
absolute humidity
temperature
Illustr
remove all traces of
oil from the air
overheating the drill
To protect the
operator performing
the maintenance.
Each of the above is
correct.
The name of the
person performing
the opening and
closing of such
appliances.
pitch of the screws
The fact that the hull
indicators functioned
or not.
type of driving gears
8.185 inches
8.312 inches
GS-0133
acts to close the
main valve "K"
The thread form shown in the illustration is called a/an Buttress thread
__________.
The FIRST thing to do to ensure that a refrigeration unit secure and tag the
will not start while undergoing repairs, is to
electrical circuit
__________.
14
acts to open the
auxiliary valve "D"
acts directly on the
lower part of the
main piston "H"
bleeds pressure off
the controlling
diaphragm "E" via
the high pressure
port "C"
Sharp V-thread
Whitworth thread
Acme thread
place a crow bar in
the flywheel of the
unit
inform all persons in make a log book
the area not to start entry
the unit
GS-0044
GS-0087
Book Num
Ans
11
206
B
11
208
B
11
209
C
11
210
B
11
211
C
11
212
A
11
213
C
11
214
D
11
216
D
11
217
B
11
218
C
11
223
A
11
224
Question
Answer A
Answer B
The reading on the vernier caliper scale shown in figure 1.815 inches
1.820 inches
"D" in the illustration is __________.
At which of the following locations would a duplex
Fuel oil service pump Fuel oil strainer
pressure gage most likely be located?
discharge flange
Answer C
2.115 inches
Answer D
2.820 inches
Fuel oil heater
Fuel oil flow meter
Why is the discharge pressure of a herringbone gear
pump steadier than the discharge pressure of a simple
spur gear pump?
Clearance between
the gear teeth and
casing is smaller.
The gear teeth are
smaller than those of
the simple spur gear
pump.
One discharge phase
begins before the
previous discharge
phase has been
completed.
The herringbone
gear pump has four
spur gears instead of
two.
The part labeled "B" of the illustrated bearing is called
the __________.
Which of the following actions, pertaining to saltwater
lubricated stern tube stuffing boxes, is usually observed
when the ship is expected to be in port for an extended
period?
A bourdon tube-type steam pressure gage is fitted with
a siphon loop to prevent damage from __________.
thrust ring
outer race
inner race
cage
The stuffing box is
continually flushed.
The drain connection The stuffing box
is left opened.
gland is tightened.
The packing is
adjusted for greater
cooling or replaced.
extreme thermal
stress
the admission of
condensate
pressure shock
differential expansion
rates
The thread form shown in the illustration is called a/an
__________.
In a refrigeration system, the refrigerant absorbs the
latent heat of vaporization in the __________.
Oil emulsification in engine lubricating oils will tend to
__________.
Whitworth thread
Square thread
Acme thread
Standard thread
compressor
condenser
receiver
evaporator
decrease sludge
formation in
lubricating oil
cause water to
improve the
separate from the oil lubricating oil
viscosity
In the system illustrated, which of the following readings
should be indicated on the pressure gage, if the load (x)
is 8000 lbs (3632 kg) and the piston area (y) is 10 sq. in
(64.5 sq. cm)?
The conical steel or composition cone installed on a
propeller, known as a fairwater cone, provides which of
the following benefits?
The taper produced by a lathe taper attachment is
determined by setting the __________.
The only means of removing the latent heat of
condensation from a refrigerant in the normal
refrigeration cycle is by __________.
80 psi (5.63 kg/cm2) 800 psi (56.31
kg/cm2)
8,000 psi (563.1
kg/cm2)
80,000 psi (5631
kg/cm2)
Helps with lubrication Protects the nut
All of the above
guide (swivel) bar
automatic cross feed tailstock off center
compound rest angle
passing it through
the expansion valve
condensing
refrigerant in the
system condenser
15
GS-0082
MO-0001
GS-0088
displace lubricating
oil required in areas
of friction
Reduces turbidness
B
Illustr
passing the gaseous maintaining a high
refrigerant through
pressure on the
the heat interchanger system's receiver
on the suction side of
the compressor
GS-0062
Book Num
Ans
11
225
D
11
227
D
11
228
D
11
229
A
11
230
A
11
232
A
11
233
A
11
234
A
11
235
D
11
238
B
11
239
D
11
242
B
11
243
D
Question
The converter pneumatic control bypass valve, shown
in the illustration, receives its high pressure signal from
the __________.
Which of the listed devices is used to control the
admission of steam to the steam cylinder of a
reciprocating pump?
In the illustration, the temperature of the hot-water
heating system is controlled by the temperature of the
hot water supply and the temperature of the
__________.
Which of the devices listed prevents water from
entering a ship's hull via the propulsion shaft?
Answer A
hot water return
manifold
Answer B
converter
Answer C
Answer D
Illustr
hot water circulating hot water supply line
pump discharge line
GS-0151
Valve operating
differential
Crosshead arm
Pump rod
Pilot valve and
operating rod
central station
room being heated
hot water return
outside air
GS-0151
Stern tube packing or
mechanical shaft
seal
With reference to a vessel's structural integrity, the
capability of causing
most significant characteristic of a cryogenic liquid is its brittle fractures
__________.
A boiler forced draft pressure gage indicates 6 inches of .216 psi
water. This corresponds to a pressure of __________.
Deflector ring and
drain
Spring bearings
Oiler rings
highly corrosive
action on mild steel
.288 psi
vapor cloud which
reacts violently with
saltwater
.433 psi
toxicity at
atmospheric
pressure
.688 psi
To obtain a 1/2 inch per foot taper on an 18 inch work
piece, the tailstock of the lathe must be set over
__________.
The heat required to change a substance from a solid to
a liquid while at its freezing temperature, is known as
the latent heat of __________.
A wrench that completely surrounds a nut, or bolt head
is a/an __________.
The degree to which the viscosity of an oil will change
with a change in temperature is indicated by the
__________.
Which of the listed reciprocating pump parts control the
position of the pilot slide valve?
3/8 inch
1/2 inch
3/4 inch
7/8 inch
fusion
vaporization
condensation
sublimation
adjustable wrench
open end wrench
tappet wrench
box wrench
weight designation
viscosity index
pour point
thermal change
value
Moving tappets
Adjusting of the
tappet collars
Stay rods
Movement of the
main piston through
the steam cylinder
The reading indicated on the micrometer scale shown in
the illustration is .680 inches. Which of the figures listed
represents this reading?
Which of the following guidelines is considered to
reflect good design practices of shipboard steam
heating systems?
Figure A
Figure B
Figure C
Figure D
GS-0081
Provide constant
steam service for
equipment operating
throughout the year.
16
Provide either a
Run all piping so it
common or individual may be drained by
reducing station for gravity.
each group of units
requiring the same
operating pressure.
All of the above.
Book Num
Ans
11
244
B
11
245
B
11
246
C
11
247
B
11
248
C
11
249
B
11
250
D
11
251
B
11
252
D
11
253
A
11
254
C
11
255
C
11
257
A
11
259
A
11
261
C
Question
The heat required to change a substance from a liquid
to a gas without experiencing a temperature change, is
defined as the latent heat of __________.
Answer A
fusion
Answer B
vaporization
Answer C
sublimation
Answer D
condensation
The average density of brine discharged from the last
stage of a fresh water evaporator should not exceed
__________.
A distinguishing feature of an eductor, when compared
to other pumps, is the __________.
1.0/32nds
1.5/32nds
2.0/32nds
3.0/32nds
lack of moving parts
ease at which the
wearing rings may be
changed
that pump "G" can
not develop
adequate discharge
discharge end being small size of impeller
smaller than the
suction end
While at normal sea speed the rudder movement stops, only the solenoid coil either solenoid coil
but is restored after changing over power units. At the
'F2' has burned out 'F1' or 'F3' has
earliest opportunity the faulty power unit is restarted
burned out
with the following results: the rudder can be remotely
swung in only one direction, however
shaft "K" has
developed a fault in
the mechanical
linkage
When securing a flash-type evaporator for an extended fill the unit with
period of time, you should __________.
saltwater
fill the unit with
completely drain the tightly seal the unit to
descaling compound unit
exclude air
The portion of a hydraulic hose that determines its
overall strength, is the __________.
Which features of a centrifugal pump reduce the need
for renewing worn impellers and pump casings?
inner tube
braided inner layer(s) outer cover
Close radial
clearance between
impeller hub and
casing
water seal pipe is
plugged
1,000 pounds
Low rotational speed Removable end plate Replaceable impeller
of impeller
and casing wearing
rings
2,000 short tons
A power end and
fluid end
specific heat
A propeller and
educator
sensible heat
latent heat
ambient heat
wrought iron
high alloy steel
mild steel
corrosion resisting
steel
Spur gear adjusters
.433 psi
Casing gear thrust
bearings
.688 psi
Replaceable liner
plates
.833 psi
worn wearing rings
a bent shaft
reversed pump
coupling
A centrifugal pump may fail to deliver water when first
started if the __________.
A weight of 1,000 kips is equivalent to __________.
Which of the devices listed is common to all types of
pumps?
Heat which brings about a change in the physical state
of a substance without a change in temperature, is
called __________.
The hulls of most modern towing vessels constructed
today are fabricated from __________.
Which of the listed parts is used in a lobe-type rotary
Replaceable gib
pump to allow for wear on the lobe edges?
inserts
A boiler forced draft pressure gage indicates 8 inches of .288 psi
water. This corresponds to a pressure of __________.
If a centrifugal pump vibrates and is noisy when
operating, the cause could be __________.
worn gland sealing
shaft
17
pump is not primed
seal ring is
improperly located
2,240 pounds
outer armor
impeller is flooded
500 short tons
A volute and impeller A turbine and piston
Illustr
GS-0123
Book Num
11
262
Ans
B
11
263
B
11
264
D
11
265
C
11
266
A
11
267
D
11
269
D
11
271
D
11
272
D
11
273
D
11
274
A
11
275
C
11
276
C
11
277
11
Question
Which of the wrenches listed is least likely to slip off a
bolt head or nut?
Expansion tanks when used in a ships hot water
heating system, may be of the open or closed type. In a
closed type system, what would be the normal
temperature range of the water?
Latent heat can be defined as the heat which must be
added to a substance in order to change it from a
__________.
The designation 'schedule 80 extra strong ' refers to
__________.
The reading indicated on a vernier micrometer caliper
scale is .2613 inches. Which of the figure in the
illustration represents this reading?
Tapping threads into a blind hole should be finished by
using a __________.
The factors that determine the service life of packing in
a pump will include which of the following conditions?
Answer A
Open end wrench
Answer B
Box end wrench
Answer C
Crescent wrench
Answer D
Spanner wrench
180° F to 212° F
220° F to 240° F
260° F to 280° F
320° F to 360° F
solid to liquid
liquid to vapor
solid to vapor
all of the above
weight of steel plate
tensile strength of
bolts
Figure D
piping wall thickness tubing bursting
strength
Figure E
Figure G
Figure A
Illustr
GS-0083
short tap
taper tap
plug tap
bottoming tap
type of pump
condition of the shaft length of time in use all of the above
If the capacity of a centrifugal pump decreases
packing gland
gradually over a long period of time, you should replace
the __________.
What is the reading of the vernier micrometer caliper
0.4258 inch
scale shown in figure "C" in the illustration?
mechanical seals
lantern rings
wearing rings
0.4528 inch
0.4628 inch
0.4678 inch
lantern rings
bearings
casing volutes
wearing rings
face shield
a respirator
rubber gloves
an all purpose gas
mask
ductibility
elasticity
malleability
fusibility
30.0 inches of
vacuum
The drive belts will
squeal
300 millimeters of
water
The unloaders will
jam shut
14.7 psia
00.0 psia
C
To absorb the wear resulting from impeller rotation and
abrasives in the liquid, a centrifugal pump is usually
fitted with __________.
Personnel working with refrigeration systems, and
subject to the exposure of refrigerants should wear
__________.
The ability of a metal to be hammered, or rolled out is
called its __________.
A pressure reading of 00.0 psig is theoretically equal to
__________.
If the foundation bolts of a reciprocating air compressor
are loose, which of the conditions below will occur?
The compressor will
vibrate
The intercooler will
leak
279
D
Gate valves should not be used for throttling as
__________.
the pressure drop will air binding will
be excessive
develop
11
280
C
taper tap
finishing tap
11
282
C
To finish tapping a blind hole, it is best to use a
__________.
Which of the listed types of machined 'hole' is
represented by "B" as shown in the illustration?
the installation of an wire drawing of the
equalizing line will be disc will result
necessary
bottoming tap
plug tap
Counterbore
Countersink
Counterdrill
18
GS-0083
Spot face
GS-0015
Book Num
11
283
Ans
284
D
11
285
D
11
286
C
11
288
A
11
289
A
11
290
D
11
291
293
Answer A
drain water from the
air receiver
Answer B
drain water from the
cylinders
Answer C
Answer D
delay the
check pump
compression process alignment
until the motor is up
to speed
The amount of moisture in a given sample of air, when
compared with the amount of moisture the air could
hold if totally saturated at the existing temperature of
the sample, is called __________.
Which of the copper alloys listed is commonly used in
heat exchangers and possesses a high resistance to
corrosion?
Antifriction bearings can be removed undamaged from
a shaft by using an arbor press, or wheel puller with a
__________.
Which of the following statements is correct relative to
distillation plant operation?
absolute humidity
specific humidity
effective humidity
relative humidity
Red brass
Manganese bronze
Copper beryllium
Cupro-nickel
ring gage
split die
split washer or
backup ring
jack screw
Distillation is the
process of boiling
seawater to produce
vapor which is
condensed into fresh
water.
Evaporation is the
second part of the
distillation process
where brine is
removed.
Brine is the result of Distillate is the
condensed sea water product resulting
vapor.
from the evaporation
of fresh water vapor.
A leaking steam trap located in the return lines from a
heating system is indicated by excessive __________.
drain tank steaming
scale returning from
the convectors
steam pressure in
the convectors
water in the heating
system
The minimum length of dimension "C" shown in the
illustration is __________.
If a centrifugal pump is driven by a constant speed
electric motor and produces a discharge pressure less
than designed, the cause is probably __________.
27/32 inch
11/16 inch
21/32 inch
33/64 inch
excessive pump
speed
excessive suction
head
worn wearing rings
gross pump
misalignment
The bearings for the illustrated pump are lubricated by
__________.
a small selfcontained forced
feed pressurized oil
system
absolute humidity
packed grease
oil feed rings rotating a drip feed oiler cup
through an oil bath
relative humidity
specific humidity
total humidity
Hydrochloric acid
Chlorine
Sulfuric acid
Zinc chromate
C
11
11
Question
The purpose of an air compressor unloading device is
to __________.
C
C
11
294
B
11
295
B
The ratio of the weight of moisture contained in a given
volume of air, to the weight of moisture that the same
sample would hold if saturated, is called the
__________.
Which of the listed chemicals can be routinely used to
maintain the hygienic quality of potable water?
11
296
D
Which of the following statements concerning
antifriction bearings installed on pumps is true?
The inner race
The outer race
Alignment is not a
should be free to turn should be free to turn critical factor in their
on the shaft.
its housing.
installation.
19
They are usually
pressed on to their
shafts.
Illustr
GS-0014
GS-0129
Book Num
Ans
11
297
C
11
298
D
11
301
D
11
303
C
11
304
A
11
305
306
A
11
307
C
11
308
C
11
309
B
11
310
C
11
311
D
313
Answer B
soap and water
Answer C
a wire brush
Answer D
a chipping hammer
The packing installed in the pump stuffing box is
gravity and feed oil
normally lubricated by __________.
cups
The included angle of the chamfer in the knurled portion 5°
of the tube sizing tool illustration is __________.
grease cups
hand during
installation
20°
leakage through the
stuffing box
30°
A lathe dog, fitted with a headless set screw, is known
as a __________.
The moisture sensitive element of a humidistat can be
made of __________.
Which of the following statements is correct regarding
an oil with a high viscosity index?
clamp lathe dog
standard lathe dog
safety lathe dog
common lathe dog
hair
copper
plastic
steel
A large change of
viscosity occurs with
a minor change in
temperature.
No change in
viscosity occurs with
any change in
temperature.
Very little change in
viscosity occurs with
a significant change
in temperature.
The viscosity of the
oil increases with an
increase in
temperature.
An organic solid lubricant, such as graphite, is suitable
as an oil additive when used in __________.
machinery bearings
subjected to high
temperatures
antifriction bearings
on general service
pumps
bearings subject to
fluctuating loads
line shaft bearings
Ferrous metals are metals containing __________.
no iron
Which of the following clearance readings should be
taken and recorded in dry-dock?
The clearances
between the
propeller blade tips
and the hull.
a large percentage of
copper
The clearances
between the
propeller hub and the
fair water cone.
a large percentage of
iron
The rudder bearing
clearances.
Brine density in a distilling plant is measured with a/an
__________.
For the various sizes of tubing and wall thickness used
in a hydraulic system, the inside diameter can be
determined if it is remembered that the inside diameter
equals the outside diameter less __________.
psychrometer
salinometer
anemometer
a large percentage of
aluminum
The clearances
between the stern
tube packing gland
and the retaining
ring.
sphygmomanometer
the wall thickness
1.5 times the wall
thickness
2 times the wall
thickness
2.5 times the wall
thickness
In the illustrated drawing, the feature indicated by the
measurement 1/8" is an example of __________.
camber
radius
taper
chamfer
Which of the following definitions accurately describes
'tool feed' when referring to lathe work?
The distance the tool
advances with each
revolution of the
work.
C
11
11
Question
Answer A
The steam coils in a high pressure evaporator used for a needle gun
saltwater service should be descaled with __________.
A
10°
Illustr
GS-0014
GS-0016
20
The distance from
the bottom of the cut
to the uncut surface
of the work piece.
The distance the
work piece
circumference moves
past the cutting tool
point in one minute.
The chip length that
will be removed from
the work in one
minute.
Book Num
11
314
Ans
B
11
315
B
11
316
C
11
11
11
11
317
318
319
320
Question
When handling contaminated oil from a hermetically
sealed refrigeration compressor unit that has burned
out its motor, you should __________.
Answer A
store the oil in a
clean refrigerant
drum
The greatest difference between absorbent and
adsorbent filters is that absorbent filters __________.
will remove additives soak up liquid
do not create
attract or have liquid
from the lube oil
contaminants directly pressure drops in the contaminants stick to
into the filter media lube oil system
the surface of the
filter media
The graphite in a bearing lubricant compound of
graphite grease, acts as a __________.
low temperature
sealer
moisture barrier
filler to smooth
coolant to carry away
surface irregularities heat
Which of the following statements describes the
function of an alarm annunciator on an engine room
alarm panel?
An alarm condition
causes a light and
siren to come on
which remain on until
the machinery is
secured.
An alarm condition
causes a flashing
light to illuminate
indicating the
malfunction, followed
by an audible alarm.
When the alarm
acknowledge button
is depressed, the
audible alarm is
silenced and light
stops flashing but
remains illuminated.
An alarm condition
gives an audible and
visual alarm signal,
both of which are
secured when the
alarm acknowledge
button is depressed.
B
C
D
B
When replacing ball bearings on an electric motor shaft, tap the outer race
you should __________.
with a mallet
The pump packing gland has been repeatedly tightened Replace all of the
by small increments until the gland has bottomed.
packing.
Which of the actions listed should be carried out next if
the leakage continues to be excessive?
Answer B
use rubber gloves
Answer C
circulate the oil
through a filter drier
apply even pressure apply even force to
to the outer race
the inner race
Replace with larger Replace the soft
cross-sectional turns packing with packing
of packing.
turns that are
covered with lead
wrap.
Copper is sometimes used for fluid power lines because has good resistance has high resistance withstands heavy
it __________.
to high temperatures to corrosion
vibration under heavy
system loads
21
Answer D
remove the oil with a
portable charging
cylinder
An alarm condition
causes a flashing
light to come on,
followed by an
audible alarm. When
the alarm
acknowledge button
is depressed, the
warning light is
extinguished.
apply pressure
evenly to both the
inner and outer races
Continue to add
more turns of
packing.
resists hardening
under stress
Illustr
Book Num
11
321
Ans
323
C
11
324
B
11
325
D
11
327
D
11
328
A
11
329
C
11
330
331
Answer A
Answer B
Answer C
pump to short stroke pistons to stop in mid- pump to operate
sluggishly
continuously at both stroke
ends of the stroke for
both cylinders
Answer D
cushioning valves to
wear
An inverted gate valve (stem pointing downward) may
be subject to wear sooner than a similar valve installed
in the upright position because __________.
the gate's full weight the gland stud nuts
is upon the stem
are under more
pressure
sediment collects in
the bonnet
the packing will not
properly adhere to
the stem
For safe storage, the maximum allowable temperature
to which refrigerant bottles should be exposed is
__________.
Adsorption filters are not commonly used in steam
turbine or diesel engine lubricating systems because
they __________.
100° F
125° F
150° F
175° F
utilize exotic and
expensive filtering
media making them
too costly for use.
are only effective at
temperatures below
100° F
can adsorb no more
than five times their
weight in water
remove additives
from the lube oil
A graphite filler commonly mixed with grease, acts
__________.
Main engine room control console alarms are usually
designed to be of the self monitoring type, meaning that
an open circuit to a particular alarm circuit will
__________.
When removing roller bearings from a shaft, the force of
the puller should be applied to the bearing __________.
as a mild abrasive
to lower the friction
coefficient
cause a backup
power supply to
energize
all of the above
cause an alarm
condition
to smooth surface
irregularities
secure power to the
indicator
outer race
raceway
inner race
retainer plate
After installing a new hydraulic pump in a system, what
special attention should be given to the hydraulic
system?
The relief valves in
The filters and
the system should be strainers should be
readjusted.
checked frequently.
All system pressure
should be
readjusted.
The system should
be drained and
renewed with a fluid
of different operating
characteristics.
C
11
11
Question
Excessive lost motion in the valve mechanism of a
duplex reciprocating pump will cause the __________.
B
C
A pounding noise occurring in one cylinder of a steam
lower than normal
reciprocating general service pump could be caused by supply steam
__________.
temperature
An unloader is installed on an air compressor to
__________.
11
332
D
lower than normal
supply steam
pressure
bypass the high
prevent excessive
pressure stage to the interstage pressure
low pressure stage
buildup
on 100% of the air
compressors in
service
22
automatically reclose
within 10 seconds
improper adjustment loss of air charge in
of steam cushion
the pump discharge
valves
plenum chamber
control compressor
discharge pressure
remove all but the
frictional load during
starting
Illustr
Book Num
11
333
Ans
C
Question
Which of the speeds listed represents the synchronous
speed rating of the lube oil pump motor shown in the
illustration?
People familiar with ammonia refrigeration systems
become accustomed to its odor and may forget that the
vapors __________.
Answer A
1,000 RPM
in a low
concentration can
cause death
will burn or explode
all of the above
fluid flow rate
discharged to the
motor
enlarging existing
threads
No shaft liner is
needed in the area of
the babbitted bearing
surface.
length of the motor
piston stroke on the
power cycle
cutting original
threads
The system pressure
must be lowered
when maneuvering in
port to prevent
blowing the outer oil
seal.
pintle discharge rate
to the suction side of
the pump
straightening tapered
threads
For precise
regulation of the
bearing temperature,
the system is
required to have its
own oil cooler.
allow the winch to
replace the bearing
run at slower speeds with a new one
only
a loose tappet collar clogged suction
an open snifter valve
strainers
apply a light oil to the
bearing housing
misalignment of the
crosshead guide
Open end wrench
Box end wrench
Crescent wrench
Monkey wrench
toxic
flammable
explosive
all of the above
One set of valves in
the water chest and
another set in the
liquid cylinder.
Two relief valves,
one on each of the
liquid cylinder.
center drilled
chamfered
D
11
335
B
11
336
A
11
337
B
amount of cylinder
block offset with
respect to the rotor
A thread chaser is a hand tool that should only be used restoring damaged
for __________.
threads
Which of the following statements best describes an oil It receives its oil
lubricated stern tube bearing installation?
supply from a branch
line of the main lube
oil system.
11
339
C
The best method of fixing a winch motor bearing of the
sealed type that is running hot is to __________.
11
341
D
11
342
B
11
344
D
345
B
11
346
D
11
347
C
11
348
A
The speed of a radial piston hydraulic MOTOR is
controlled by varying the __________.
Item "B" in the pump illustration is the __________.
Answer D
1,250 RPM
will dissolve in
perspiration and
cause caustic burns
334
11
Answer C
1,200 RPM
Illustr
GS-0011
11
When piston rod packing persists in leaking on a
reciprocating steam pump, the cause may be
__________.
Which of the wrenches listed practically eliminates the
possibility of its slipping off while tightening a nut or
bolt?
Ammonia when used as a refrigerant is valuable
because of its high efficiency, it is however
__________.
Which of the following valve arrangements permits the
reciprocating pump liquid piston to take suction from the
suction chamber, and simultaneously discharge through
the discharge chamber during the up and down
strokes?
A thread die will be easier to start if the end of the shaft
to be threaded is slightly __________.
On tankers using manually operated tank valves, the
deck hand wheel indicator registers the __________.
Answer B
1,150 RPM
add grease through
the zerk fitting
Two sets of suction Two sets of valves,
and discharge valves one set each for
in the liquid cylinder. suction and
discharge located in
the water chest.
peened
reamed
exact lift position of
the tank valve disk,
through 100% of its
operation
packing gland
23
oxygen content of the approximate number level of oil in the tank
tank
of turns the tank
valve has been
opened
stuffing box
shaft sleeve
wearing ring
GS-0129
Book Num
Ans
11
349
A
11
350
A
11
351
A
Question
After adding grease to a ball bearing with a handheld
grease gun, you should __________.
Answer A
run the machine with
the bearing housing
drain plug open for a
short while
Answer B
close the bearing
housing drain and
add a little extra
grease to
compensate for air
pockets in the
bearing
Answer C
Answer D
remove the grease
save the used
fitting and leave open grease for chemical
to allow excess
analysis
grease to escape
Which of the following terms is used to identify the
pressure of a liquid entering a centrifugal pump?
Which of the following conditions would prevent a
steam reciprocating pump from delivering its rated
capacity?
Suction head
Pump head
Discharge head
A pipe coupling is a fitting having __________.
11
11
353
354
D
C
11
355
B
11
356
A
11
357
B
11
358
D
11
359
B
Total head
Excessive suction lift Air trapped in the
A leaking snifter
All of the above
discharge expansion valve allowing air to
chamber
enter the suction side
of the pump
outside threads on
outside threads on
a left-hand twist
inside threads on
one end and inside both ends
both ends
threads on one end
When subjected to high heat from a open flame, or an CO2
electric heating element, which of the listed refrigerants
will break down and produce phosgene gas?
Methyl chloride
R-22
Sulphur dioxide
The construction of the main propulsion engine lube oil
sump should __________.
have no plating joints retain the lube oil as
of 90°
long as possible
before it recirculates
through the system
provide drain/return
lines that are no
greater than 24
inches from the
pump suction
be provided with only
a perfectly horizontal
bottom
Demulsibility of a lube oil is defined as __________.
the ability of oil to
separate from water
the temperature at
which oil flows
rapidly
The clearance volume for a single stage compressor is top of the piston and piston and head,
defined as the space created between the __________. bottom side of head, including the space
with the piston at
around the piston to
BDC
the top of the upper
ring and under the
valves, with the
piston at TDC
a measure of the
water in a lube oil
system
bottom of the piston
and bottom side of
the head at TDC,
regardless of upper
ring location and
valve placement
an emulsion of
different grades of oil
Admitting steam to an improperly drained heating
system could result in __________.
damage due to water all of the above
hammer
Figure "C" shown in the illustration correctly identifies
the position of the journal when the shaft is
__________.
Illustr
cutting valve seating high velocity slugs of
surfaces
water in motion in the
system
just at the moment
just beginning to
prior to being
rotate
stopped
24
top of the piston and
bottom side of the
head at TDC as
compared to that
which exists between
the top of the piston
and bottom side of
head at BDC
increasing its speed operating at its
to required operating normal operating
speed
speed
GS-0121
Book Num
Ans
Question
Answer A
New piping and tubing to be installed in a hydraulic
alcohol
system can be safely degreased by using __________.
Answer B
a water-based
detergent
Answer C
carbon tetrachloride
Answer D
a special petroleum
solvent
Centrifugal
Gear
Propeller
Turbine
aftercooler relief
valve
liquid strainer
intercooler relief
last-stage unloader
valve
refrigerant inlet of the inlet side of the
condenser
evaporator
carbon dioxide gas
phosgene gas
11
360
D
11
361
B
11
362
B
11
363
D
11
364
B
11
365
C
If the discharge valve is closed before the drive motor is
stopped, which of the following types of pumps will most
likely be damaged?
Over pressurization of an air compressor intercooler is
prevented by the __________.
When the relief valve opens on a refrigeration
compressor discharge line, it discharges high pressure
refrigerant vapor to the __________.
Dichlorodifluoromethane when vaporized in the
presence of an open flame, will form __________.
The main lube oil sump of a main propulsion engine
should be constructed of __________.
11
366
D
The ability of an oil to separate cleanly from an oil and
water mixture is referred to as its __________.
11
368
C
11
369
A
11
370
C
11
372
D
11
373
A
11
374
B
coated steel plating
to reduce corrosion
nonferrous metal
plating to prevent
corrosion
precipitation number neutralization
number
Illustr
first-stage unloader
suction side of the
compressor
trichlorodifluorometh sulphur dioxide
ane
clean steel plating
pinchback plating
pour point
demulsibility
system differential
The vessel's steering gear is a classic example of a
positioner type automation system. The variable input is
provided through the steering wheel, and the rudder
position is fed back to the operating mechanism. The
difference between the input signal an
proportional band
error
command input
You would close the illustrated valve "A" by
__________.
turning the
handwheel
clockwise, as viewed
from the top
first loosening part
#4, closing the valve,
then retightening part
#4
turning the
handwheel
counterclockwise, as
viewed from the top
first loosening part
#8, then turning the
handwheel clockwise
GS-0140
as viewed from the
top
Erosive tube failure in a heat exchanger can result from
__________.
In addition to a pressure gage and a relief valve, an air
receiver should be fitted with a __________.
The device shown in the illustration is used to
__________.
high temperature
waterside fouling
poor heat transfer
sight glass and
manhole
unload the cylinders
of an air compressor
thermometer and
sight glass
reduce the pressure
in the ship's service
air system
excessive cooling
water velocity
thermometer and
manhole
grind sewage prior to
entering the sewage
treatment plant
phosgene gas
water vapor
In the presence of an open flame or hot surfaces,
chlorinated fluorocarbon refrigerants decomposes and
form __________.
petroleum crystals
25
drain connection
maintain correct
tension on the drive
belts while the
compressor is in
operation
carbon monoxide
GS-0029
Book Num
11
375
Ans
D
11
376
B
11
377
C
11
11
11
378
379
380
B
D
381
A
11
382
A
384
Answer A
1 and G
directly equal to the directly proportional
height of the liquid in to the pressure
the tank
developed at D
equal to the fluid
equal to the pressure
pressure supplied at of the square root of
B
the height of liquid H, GS-0066
times .833
To obtain maximum efficiency, two stage air
compressors are usually __________.
horizontally mounted never fitted with
intake filters
fitted with
intercoolers
In a pneumatic automation system, a unit producing a
signal to govern the position of the controller of the
measured variable, relative to the value of the
measured variable, is said to have __________.
reset action
proportional action
two position action
To make the pieces shown as "A" in the illustration a
locational interference fit __________.
the piece with the
hole must be heated
until the inside
diameter of the hole
is .245 inches +/.001
do nothing, this is a
close sliding fit but
there is no way to
make it a locational
interference fit and a
close sliding fit is an
acceptable
alternative
turn down a new
hone the shaft until
shaft with a diameter the roughness value
of .250 inches +.001/- is 50 micro inches
.000
(.005 inch clearance)
C
11
11
Question
If the refrigeration system shown in the illustration has
only one liquid line strainer, the strainer will be located
between points __________.
The illustrated device operates on the principle that the
height of the column is __________.
B
Answer B
G and C
Answer C
J and F
Answer D
D and K
RA-0012
operated in an
unloaded condition at
all times
rate action
GS-0019
The function of the hydraulic telemotor transmitter used transmit the rudder
in an electro-hydraulic steering gear system is to
angle to the bridge
__________.
indicator
automatically purge send hydraulic
all entrained air from signals to the
the system
receiving unit
Which of the following statements is/are true regarding
hydraulic pumps in general?
prevent the control
linkage from striking
the stops when hard
over
Variable volumes
A radial piston pump
can be obtained with houses sliding
gear pumps only by pistons in a
variation of the pump stationary cylinder
drive speed.
block through which
passes a rotating
pintle or ported shaft.
The amount of fluid All of the above.
displaced per
revolution of an axial
piston rotary pump is
maximum when the
angle of the tilting
box is at right angles
to the shaft.
toward the oil
pressure being
sealed
superheated outside
the system
away from the oil
pressure being
sealed
heated to the boiling
point
Spring reinforced oil seals are generally installed with
the tail or lip of the seal facing __________.
R-12 is generally considered to be a safe, nontoxic,
nonflammable, and non-explosive refrigerant. It can,
however, become highly toxic when __________.
Illustr
26
toward the bearing
preload washer
in contact with an
open flame
away from the
bearing housing
recess
all of the above
GS-0152
Book Num
Ans
11
385
C
11
386
B
11
387
B
11
388
D
11
389
A
11
390
C
11
391
D
11
392
D
11
393
D
11
394
D
11
395
D
11
397
B
Question
The difference between the pressure at a point being
measured and that of a perfect vacuum is known as
__________.
The diameter of a hole drilled for tapping threads into a
piece of stock should be __________.
In a low pressure air compressor, the loss of volumetric
efficiency normally results from __________.
Answer A
internal pressure
Answer B
gauge pressure
Answer C
absolute pressure
Answer D
external pressure
larger than the tap
diameter
adiabatic
compression in the
intercooler
smaller than the tap
diameter
heating of the air
leaving the cylinders
the same size as the
tap diameter
inaccurate valve
timing
The seal piping obtains liquid from the discharge side of packing gland
the pump and directs the liquid to the __________.
wearing ring
stuffing
the same size as the
bolt diameter
constant
enlargement of the
clearance expansion
volume
lantern ring
While attempting to read a tank level indicator, the
mercury column drops rapidly. This may indicate
__________.
Lint from cleaning rags can be harmful to hydraulic
systems because the lint __________.
a leak in the gage
line
free surface effect in an improperly
the tank
calibrated gage
can cause rusting of breaks down
internal parts
hydraulic fluid
can clog filters and
promote component
leakage
solidifies and causes
cracked lines
In the hydraulic transmission shown in the illustration,
the "B" end is a __________.
low pressure
hydraulic pump
constant speed
hydraulic motor
fixed displacement
hydraulic motor
install only a filter
consisting of a
treated paper
element
select the proper size
filter so that air flow
is not restricted
ice in the expansion
valve
allowed to mix with
compressor oil
all of the above
An important point of consideration when replacing a
dry type intake filter on an air compressor is to
__________.
variable
displacement
hydraulic pump
use the same wetting install a smaller size
oil on the element as filter to allow for
expansion of the
is used in the
element
compressor
lubrication system
excess air in the
balance chamber
A refrigeration system contaminated with moisture can acid formation
be affected by __________.
Some chlorinated fluorocarbon refrigerants may
stored at
decompose into a toxic irritating gas if it is __________. temperatures below
60 degrees
Fahrenheit
Which of the following statements describes the
Liquids with different
relationship between viscosity and specific gravity?
viscosities will always
have the same
specific gravity.
sludge formation
Liquids with different Viscosity and specific
viscosities will never gravity are directly
have the same
proportional.
specific gravity.
Viscosity and specific
gravity are not
related in that one
does not define or
limit the other.
The delivery rate of a variable stroke axial piston
hydraulic pump is controlled by varying the position of
the __________.
tilting box
reaction ring
slide block
27
charged into a
system having
copper fittings
pintle
Illustr
exposed to an open
flame or hot surface
GS-0057
Book Num
Ans
11
398
B
11
399
D
11
400
D
11
401
A
11
402
B
11
403
B
11
404
A
11
405
B
11
406
B
11
407
C
11
408
B
11
409
C
11
410
B
11
411
B
11
412
C
Question
Biasing, in a pneumatic automated combustion control
system, refers to a set amount of increase or decrease
in the __________.
If you suspect that a gage is sticking and giving an
inaccurate reading, you should __________.
Answer A
control pressure
Answer B
loading pressure
Answer C
supply pressure
Answer D
rate relay pressure
remove the gage
bezel and slightly
move the needle
less internal
corrosion
replace the gage or
have it calibrated
Countersunk
Counterdrilled
Spot faced
Close, short, long,
and tank
Cast, wrought,
Standard, extrastrong, double extra- stainless, and brass
strong, and schedule
80
clamp
morse sleeve
blow out the gage
tap the gage body
line with compressed with a wrench
air
better water purity
less scale formation
One advantage of a triple-effect low pressure
submerged tube distilling plant over a double-effect unit
is __________.
In the illustration shown, what is the proper description Counterbored
of the hole represented by "C"?
Which of the following descriptions should be included Fully threaded, half
when identifying the length for pipe nipples?
threaded, long, and
short
To drill a hole in round stock, perpendicular to the axis
of the piece, the stock should be mounted in a
__________.
For the proper control of the air temperature in an air
conditioning system using chilled water circulation,
which of the listed conditions should remain constant
regardless of load changes?
Which of the following is NOT an identifiable
characteristic of a steam reciprocating pump?
The pressure of a liquid leaving the pump can be
referred to as the __________.
Obstructed suction passages in the casing or pintle of a
radial piston hydraulic pump will cause the
__________.
collet
V-block
greater evaporator
efficiency
Chilled water system Chilled water system Compressor
supply temperature. return temperature. discharge
temperature.
Compressor suction
pressure.
Direct-acting
Diffuser
Vertical
total head
discharge head
Potable water piping systems installed aboard ships
must be __________.
disinfected monthly
with a chlorine
compound
independent of all
cadmium lined to
other piping systems prevent internal
corrosion
A pressure gage pointer responding sluggishly to
changes in pressure, should be repaired by
__________.
Tube leaks in the distillate cooler of a two stage flash
evaporator will result in __________.
tapping the gage
housing lightly
bending the needle
to free the linkage
The device illustrated is known as a __________.
semi-balanced
rudder
male threads only
The threaded pipe fitting called 'street elbows' have
__________.
High-pressure
Illustr
GS-0015
net positive suction suction head
head
pump back pressure pump return and
pumped fluid volume pump discharge flow
to decrease
discharge pressures to decrease
to drop to zero
to equalize
cleaning the residue greasing the hair
from gear teeth
spring
loss of second stage contamination of the lower feed inlet
vacuum
distillate
temperature
28
flushed each time
potable water is
taken onboard
unbalanced rudder
horn-hung rudder
contamination of the
second stage
condenser
balanced rudder
female threads only
male and female
threads
interrupted threads
on each end
GS-0101
Book Num
Ans
11
413
D
11
414
C
Question
Failing to decrease the feed pressure on a drill as its
point begins to break through the bottom of the work
piece will cause the drill to __________.
Coast Guard Regulations (46 CFR) require a method
for the relief of an over pressurized refrigeration system.
Which of the following statements complies with these
regulations?
11
415
C
Air leakage between the shaft and stuffing box packing
in a centrifugal pump is prevented by __________.
a compressed
packing gland
11
416
D
centrifugal pumps
positioning
proportioning
biasing
11
418
C
The suction-force principle of operation is a typical
characteristic of __________.
In an automation system, increasing or decreasing the
loading pressure by a set amount is known as
__________.
A fuel oil tank pneumercator will give an inaccurate
reading if the __________.
lantern rings
a liquid seal
between the packing
rings
jet pumps
propeller pumps
pneumercator is
recharged with the
air supply open
operating cock is
pressure in the
system is allowed to placed in the 'vent'
position when the
equalize
system is not in use
Hydraulic pumps most commonly used in steering
systems are of the __________.
Fittings used to close the ends of pipe are called
'pipe__________'.
When drilling blind holes with a standard drill press, the
proper method of stopping the progress of the drill
boring through the work is by __________.
lobe type
pneumercator
balance chamber
bleed orifice is
blocked by the oil
being measured
screw type
axial piston type
volute type
caps
ells
tees
closures
moving the working
table
using a depth stop
adjusting the spindle gaging chuck motion
return spring
In a direct expansion type multi-box refrigeration
system, the compressor is set up to cycle on and off by
the __________.
An additive used to improve the ability of a lube oil to
reduce friction is known as a/an __________.
One advantage of a flash distilling plant when compared
to a submerged tube distiller is __________.
pressurestat
high pressure cutout solenoid valve
11
419
B
11
421
C
11
422
A
11
423
B
11
424
D
11
425
C
11
427
B
11
428
C
11
429
D
Potable and non-potable water systems aboard vessel
__________.
The term, whole depth of the gear, shown in the
illustration, is equal to __________.
Answer A
break cleanly
through the bottom of
the work piece
The relief valve from
the receiver must
relieve to the
condenser first.
Answer B
cut an elongated
hole in the bottom of
the work piece
The relief valve
settings shall be 1
1/4 times the
maximum allowable
working pressure.
reciprocating pumps
controlling
suppressant additive dispersant additive
greater distillate
purity through high
temperature
evaporation
may be temporarily
interconnected with a
removable spool
A+D
29
cold shocking for
scale removal is not
required
are permanently
interconnected
through a double
stop valve
B+D
Answer C
form a tapered hole
in the bottom of the
work piece
A rupture disk may
be fitted in series
with the relief valve.
Answer D
jam in the work piece
and tend to whirl it
around
The rupture disk
shall burst at a
pressure not higher
than 10% above the
relief valve setting.
Illustr
the stuffing box gland
low pressure cutout
switch
extreme pressure
additive
less internal
corrosion because of
lower brine density
PH alkaline additive
may never be
interconnected by
any means
may be connected if
they are used only
for wash water
C+A
C+D
less feedwater is
required for equal
plant capacity
GS-0111
Book Num
Ans
11
430
D
11
431
D
11
432
B
11
433
B
11
434
C
11
436
B
11
438
B
11
439
D
11
440
D
11
441
B
11
442
B
11
443
B
11
444
C
11
446
A
11
448
C
Question
In an electro-hydraulic steering gear system, when will
the variable displacement pump be placed on stroke?
Answer A
Answer B
When the helm is at When the six-way
any angle other than valve is opened.
amidships.
Answer C
When the ram relief
valves lift.
In application, which of the listed sealing devices is
most similar to an O-ring?
A 'close nipple' is a piece of pipe that is __________.
V-ring
Cup seal
U-ring
less than 1/2 inch
long
threaded along the
entire length
Answer D
When the rudder
angle is different
from the position of
the helm.
Quad ring
Which of the pumping systems listed for use aboard
ship will most likely use a propeller type pump?
Fluid power
Main circulating
transmission system system
shorter than the
thread only on one
nipple outside
end
diameter
Steering gear system Fuel oil service
booster system
Which of the listed operations will cause an
automatically controlled refrigeration compressor to
restart?
The ability of lubricating oils to resist viscosity changes
during temperature changes is indicated by the
__________.
Which of the additives listed is used to reduce the
foaming tendency of lube oil?
In ship construction, the shell plating is arranged in
strakes and assigned letter designations. If the strakes
were lettered "A" through "K", the "K" strake will be
__________.
The suction side of the illustrated pump is identified by
the letter __________.
The illustrated valve, figure A, needs to be repaired due
to a leak across the valve disk. To disassemble the
valve you should __________.
Closing of the
solenoid valve
An increase in the
suction pressure
Decreasing the
suction pressure
American Petroleum viscosity index
Institute number
number
Seconds Saybolt
Furol number
Seconds Saybolt
Universal number
Emulsifiers
Suppressants
Depressants
Extreme pressure
at the turn of the
bilge
the keel strake
the drop strake
the sheer strake
A
B
C
D
turn the hand wheel
clockwise as viewed
from the top, using a
pipe wrench for
assistance
first fully loosen part
#8, then turn the
handwheel clockwise
to separate the
bonnet from the body
first fully loosen part
#8, then turn the
handwheel
counterclockwise to
separate the bonnet
from the body
tighten part #4
To connect two lengths of pipe previously set in place,
you should use a pipe __________.
One of the steps required to increase the drilling speed
of a drill press is to __________.
nipple
union
coupling
tee
move the drive belt move the drive belt change the terminal
to a smaller diameter to a smaller diameter connections of the
motor pulley
spindle pulley
drive motor
change to a larger
diameter spindle
Saltwater is typically provided to a refrigeration system
to __________.
Which of the figures illustrated correctly identifies the
position of the journal while it is stopped?
Which of the additives listed is used to lower the pour
point of a lubricating oil?
cool the expansion
valve
A
prevent refrigerant
superheating
B
condense the
refrigerant gas
C
prevent motor
overheating
D
Emulsifiers
Suppressants
Depressants
Extreme pressure
30
Closing of the
expansion valve
Illustr
GS-0129
GS-0140
GS-0121
Book Num
11
11
449
451
Ans
B
C
11
452
D
11
453
B
11
454
D
11
456
B
11
458
B
11
459
A
11
461
B
11
462
B
11
463
A
11
464
C
11
465
D
11
466
B
Question
Answer A
Answer B
In ship construction, the strakes are given letter
deck edge strake
keel
designations beginning with the letter 'A.' The "A" strake
is adjacent to the __________.
Under normal operating conditions, the rudder is
the manual trick
the variable stroke
hydraulically locked unless __________.
wheel is engaged for pump is off stroke
steering
Answer C
turn of the bilge
strake
Answer D
sheer strake
a rudder order is
given by the control
system
an electric power
system failure occurs
at the steering gear
Illustr
Temporary Certificates of Inspection for offshore drilling Operations Manual is Minerals
classification society permanent
units are effective until the __________.
approved
Management Service approval is issued
Certificate of
approval is issued
Inspection is issued
A tapered shank drill is removed from the drill press
spindle with a __________.
In a direct expansion type cargo refrigeration system, a
box is normally changed from chill to freeze by adjusting
the __________.
Which of the following statements is correct concerning
the viscosity of lubricating oil?
taper punch
drill drift
vice grip
leather mallet
hand expansion
valve
compressor suction
valve
solenoid bypass
back pressure
regulating valve
Viscosity is a
measure of a fluid's
internal resistance to
flow.
Wax content
Viscosity will
decrease as
temperature
decreases.
Water content
Viscosity is not
dependent on
temperature.
Lubricate the lantern
ring with cylinder oil
before installing new
turns of packing.
Tightening the gland
in all the way and
then backing it off
slightly.
Viscosity will
increase as
temperature
increases.
The pour point of lubricating oils is affected the most by Extensive
which of the following?
centrifuging
Tighten the packing
To prevent overheating and scoring of the shaft after
in small increments
repacking the stuffing box, which of the following
while the pump is
procedures should be carried out?
operating.
Acid content
Operating the pump
slowly and applying
oil freely to the shaft
until the packing is
properly seated.
Which of the valve arrangements listed can be used to
modify the four ram hydraulic steering gear system,
shown in the illustration, to a working two ram system?
Close valves 'C3',
Close valves 'C2',
Close valves 'C1',
Close valves 'C1',
'C4', and open valves 'C4', and open valves 'C3', and open valves 'C2', and open valves
GS-0067
'B1', 'B2'
'B2', 'B4'
'B1', 'B2', 'B3'
'B3', 'B4'
The type of shaft coupling used on the pump illustrated
is best described as a __________.
To remove a hand held right-handed straight cut reamer
after it has gone all the way through a hole, you should
__________.
flexible grid coupling solid coupling
gear coupling
jaw coupling
turn the tap wrench
clockwise,
simultaneously
raising the reamer
the solenoid valve to
seize
work the reamer side
to side to dislodge it
the compressor to
hunt
turn the tap wrench
counterclockwise,
simultaneously
raising the reamer
flash gas to form in
the liquid line
desiccated suction
strainers
internal friction
multi-orificed suction blowdown valves and
valves
filters
demulsibility
S.A.E. number
A pressure drop in the liquid line of a refrigeration
system may cause __________.
Moisture and impurities can be removed from
pneumatic systems by using __________.
The viscosity of an oil is a measure of its __________.
air intake heaters
weight
31
tap the reamer out
with a soft faced
hammer
the expansion valve
to freeze open
GS-0143
Book Num
11
467
Ans
B
11
468
B
11
469
B
11
470
B
11
471
D
11
472
C
11
473
A
11
474
D
11
475
B
11
477
D
11
478
D
11
11
480
481
D
D
Question
The purpose of the propeller fairwater cone is to
__________.
Although lube oils used in the main lubricating service
systems should have a relatively high flash point to
avoid ignition, they can create smoke and fire hazards
when they __________.
Vertical transverse structures in the double bottom are
known as __________.
The reading indicated on a vernier micrometer caliper
scale is .8046 inches. Which of the figure in the
illustration represents this reading?
When the helm is turned on the navigation bridge,
which of the listed actions will be the FIRST response in
the steering room on a ship equipped with an electrohydraulic steering gear?
Item "B" shown in the illustrated hydraulic circuit is used
to __________.
Answer A
lock the propeller nut
in position
are exposed to a
vacuum
Answer B
minimize water
turbulence
come in contact with
extremely hot
surfaces
Answer C
Answer D
eliminate axial thrust eliminate cavitation
pillars
floors
ceilings
stanchions
Figure A
Figure B
Figure F
Figure G
Illustr
are reduced in
become extremely
temperature to just
agitated or aerated
above the pour point
GS-0083
The pumps go to full The six-way valve
stroke.
aligns itself with the
running pump.
Both port and
The synchronous
starboard cables are receiver turns,
energized.
duplicating the helm
motion.
shut down the
shut down the
act as a power
act as a power
operation of pump
source to operate the source to operate the remotely operated
electric motor driven "E" when the
pumps indicated as pump indicated as
watertight door has
pump when the
"F"
"E"
watertight door has closed
closed
If you are hand tapping holes in cast iron, you should
__________.
Certificates of Inspection for offshore drilling units are
issued for a period of __________.
Permanent centrifugal pump shaft damage due to
erosion, corrosion, and wear at the stuffing box is
usually prevented by __________.
On vessels using reach rods to manually control the
tank valves, one turn of the hand wheel on deck will
produce how many turns of the valve stem at the valve?
tap the holes without flood the tap with
cutting oil
mineral oil
24 months
36 months
chamfer the edges of start tapping with a
the holes
plug tap
48 months
60 months
wearing rings
renewable sleeves
a hardened sprayed
metal coating
internally flooded
lantern rings
One-fourth of a turn
One-half of a turn
Three-fourths of a
turn
One turn
The flash point of most lube oils used in a main
lubricating system should be approximately
__________.
Hydraulic cranes must be properly warmed-up before
being operated because __________.
80° F to 100° F
140° F to 160° F
250° F to 300° F
350° F to 450° F
warm-up allows the
relief valves to be
properly tested
hydraulic strainers
operate only during
the warm-up period
warm-up allows the
hydraulic fluid to
reach proper
viscosity
a corresponding
slowing or increasing
of the pumped flow
rate
warm-up allows the
hydraulic system to
become charged with
oil
In an electro-hydraulic steering gear, any change in
the pump going to
relative position between the synchronous receiver and full stroke
the follow-up gear will result in __________.
32
closing of the six-way driving the rams up
valve
against the stops
GS-0103
Book Num
11
11
484
485
Ans
B
Question
What is the reading of the vernier micrometer caliper
scale shown in figure "B" in the illustration?
Answer A
0.7996 inch
Answer B
0.8046 inch
Answer C
0.8460 inch
Answer D
0.8550 inch
Which of the following statements describes the
function of an air compressor intake filter?
Protects against
suction valve float.
Provides a positive
pressure on the air
inlet valves.
Prevents lubricating
oil contamination of
the compressed air
supply.
Which of the listed characteristics of lube oil are the
most important to the engineer from an operational
standpoint?
Ash content, carbon
residue, and gravity
Viscosity, acidity,
and demulsibility
Pour point, flash
Auto ignition point,
point, and
viscosity index, and
precipitation number film strength
Deep ridges
Corrugations
GS-0083
D
Protects against the
damaging effects of
airborne solid
particles.
11
486
B
11
487
D
Which of the following conditions will indicate a need for Roughness
a finishing cut to be taken on the pump shaft?
11
488
B
A salinity indicating system functions on the basic
principle of measuring the __________.
electrical inductance electrical conductivity specific gravity of
of water
of water
water
In ship construction, the shell plating is arranged in
strakes, with four of the strakes being specifically
identified by name. The strake next to the keel is
identified as the __________.
The number of screw threads per inch for a Standard
National Coarse 1/2 inch bolt is __________.
keel strake
garboard strake
bilge strake
hydrogen ion
concentration of
water
sheer strake
13
16
18
20
In the steering gear system shown in the illustration, if
the maximum working pressure is applied to the face of
the ram, the total force on one piston will be
__________.
After conducting a boat drill on a mobile offshore drilling
unit, which of the following is the master or person in
charge required to enter into the logbook?
209,230 lbs.
836,920 lbs.
836,920 in. lbs.
24,000,000 in. lbs.
11
489
B
11
490
A
11
491
A
11
492
A
11
493
D
11
494
A
11
495
C
11
496
B
The reading on a vernier caliper scale is indicated as
2.368 inches. Which of the figures shown in the
illustration represents this reading?
What class of bulkhead is required around the galley on
a MODU?
In a flash type evaporator, all saltwater headers are
vented through individual vent cocks to the
__________.
What is the reading of the vernier micrometer caliper
scale shown in figure "E" in the illustration?
Illustr
All of the above
GS-0104
The condition of the
equipment used
during the drill.
Figure A
The name of the
lifeboatman in
charge of each
lifeboat.
Figure B
The location of the
vessel at the time of
the drill.
The time it took to
lower the boat.
Figure D
Figure G
GS-0082
Class A
Class B
Class C
Class D
saltwater heater shell second-stage
condenser
atmosphere
second-stage flash
chamber
0.3001 inch
0.3151 inch
0.3251 inch
0.3101 inch
GS-0083
33
Book Num
Ans
11
499
C
11
500
C
11
501
C
11
502
A
11
503
B
11
504
D
Question
The garboard strake is located __________.
Answer A
at the very bottom
center
A centrifugal pump vibrates excessively during
drill holes through
operation. Upon disassembling the pump it is found that the heavy side of the
the impeller is out of balance. Without an available
impeller until it
spare, you should __________.
balances
Which of the tolerances listed is allowed on the outside .060 inch
diameter of the bushing illustrated?
In the steering gear unit shown in the illustration, which Ram cylinder "A" is
of the actions listed will occur as 'left rudder' is being
under hydraulic
attained?
pressure.
Lantern rings are provided on centrifugal pumps to
allow illuminated
__________.
inspection of shaft
and packing
Moisture is removed from a refrigeration system by
bleeding refrigerant
__________.
from the condenser
505
A
11
506
D
11
508
B
11
509
D
11
510
C
11
511
D
11
512
A
Answer C
at each side of the
keel
remove metal from
the heavy side by
machining in a lathe
Answer D
at the turn of the
bilge
acid wash and
scrape the heavy
side until it balances
.002 inch
.0005 inch
1.6015 inches
Illustr
GS-0017
Ram cylinder "H" is
relieving hydraulic
pressure.
provide a passage
for the stuffing box
sealing liquid
opening a drain
petcock on the oil
separator
The colder seawater The amount of
passing through the heated feedwater
discharged from the
condenser tube
feedwater heater
bundles of the
aftercondenser is
various stages
increases evaporator increased.
vacuum.
Ram cylinder "D" is All of the above.
under hydraulic
GS-0104
pressure.
adjust leakage at the allow for distortion of
shaft gland
the wearing rings
condensing the water
in the heat
exchanger
Fewer
noncondensable
gases are created by
the flow of colder
seawater.
using a dehydrator
cartridge
Pipe friction during oil transfer will be the greatest
during the transfer of a lubricating oil at 130° F with a
viscosity index of __________.
To maintain the design discharge pressure of a
centrifugal pump, the clearance between the
__________.
The garboard strake shown in the illustration is
identified by the letter __________.
Which of the listed pumps, shown in the illustration, is
fitted with a relief valve on its discharge side?
65
80
90
100
impeller and lantern
ring is critical
B
impeller and casing
wearing rings is
critical
D
packing box and
packing gland is
critical
E
gland seal and
packing gland is
critical
F
Bilge pump
Ballast pump
General service
pump
All of the above
The tolerance of the largest diameter of the tool shown
in the illustration is __________.
The steering gear unit shown in the illustration, which of
the conditions listed will occur as 'left rudder' is being
obtained and only the 'No. 1' steering gear pump is
running?
plus or minus .006
inch maximum
Cylinder end "H" is
under pressure.
plus .003 inch
plus .000 inch to
minus .003 inch
Cylinder end "F" is
relieving.
Why will a two stage flash type distilling plant tend to
operate more efficiently when operating in cold
seawater?
11
Answer B
just under the sheer
line
weld counterweights
to the light side of the
impeller
34
plus or minus .003
inch maximum
Cylinder end "A" is
relieving.
Cylinder end "E" is
under pressure.
More seawater is
allowed to pass
through the first
stage overflow weir.
GS-0086
GS-0042
GS-0016
GS-0104
Book Num
11
513
Ans
Question
A lantern ring is __________.
C
Moisture in the refrigerant may __________.
11
514
A
Why would a flash type distilling unit be more efficient
when operated in cooler seawater temperatures?
Answer A
the bottom ring in a
set of piston rings
Answer B
the oil slinger on a
spring bearing
Answer C
Answer D
used to distribute
the lifting ring on
seal water
each running light
throughout the pump
stuffing box
clog the oil trap
freeze on the
emulsify the oil in the freeze in the king
expansion valve seat condenser
valve
and reduce the flow
of liquid refrigerant
Steam carryover
between stages is
reduced.
Evaporator vacuum
is increased.
The amount of
Feedwater flow from
available flash steam the feedwater heater
is decreased.
is increased.
Figure D
Figure F
11
515
B
11
516
B
11
518
C
11
519
C
Figure A
The reading on a vernier caliper scale is indicated as
1.820 inches. Which of the figures shown in the
illustration represents this reading?
When using the draw file method, which of the listed
A double cut file
types of files will produce a fine finish?
The end joint formed by adjoining plates in a hull plating bracket
strake is properly identified as a __________.
Only chemically
Decreased wear
rates of components active filters may be
is an advantage of its used.
use.
Society of Naval
Architects and
Marine Engineers
Figure F
A bastard file
A single cut file
A second cut file
scarph
butt
seam
11
522
A
523
A
Marine sanitation devices installed on vessels must be
certified by the __________.
U.S. Coast Guard
11
American Bureau of
Shipping
Figure D
524
B
11
525
B
The reading indicated on a vernier micrometer caliper
scale is .5260 inches. Which of the figure in the
illustration represents this reading?
The condensers located in the various stages of a flash
evaporator are cooled by __________.
When cutting external threads on a steel pipe with a
die, you should __________.
Figure C
11
11
526
528
C
D
Figure G
GS-0082
Fluid viscosity always
Which of the following precautions should be observed Deterioration of
concerning the introduction of a fire resistant fluid into a paints, seals, metals, increases as a
and electrical
normal result of its
hydraulic system?
insulation may occur. use.
11
Illustr
Environmental
Protection Agency
Figure G
GS-0083
distillate
seawater
brine
start the die at a
slight angle with the
work to create
tapered threads
tap the die with a
continue turning until never use a lubricant
hammer to break up the end of the pipe
the chips
has gone through the
die and is flush with
the die face
Which of the following conditions is most likely to cause The hydro-pneumatic The starting of the
A low water level in
water hammer in the potable water system?
tank being half full of potable water pump. the potable water
water
storage tank.
35
air
Rapid closing of a
spring closed basin
faucet.
Book Num
Ans
11
529
D
11
530
B
11
531
A
11
532
B
11
533
B
11
534
D
11
11
535
536
C
B
11
538
D
11
539
D
11
540
B
11
541
B
11
542
B
Question
The welded joint located between two plates in the
same strake of hull plating is called a __________.
Answer A
bracket
Answer B
scarf
Answer C
Answer D
lap
butt
ignition temperature flash point
The tendency of a flammable liquid to vaporize is
indicated by its __________.
Which of the conditions listed does the blueprint symbol All surfaces are to be A groove must be
shown in the illustration represent?
finish machined.
machined at the
points designated.
flammable range
convection index
The thread form to
be machined on the
bolt.
The surface should
be finished with a
welded overlay.
When responding to a 'right rudder' command from the "C" and "F"
amidships position, which parts of the steering gear
system illustrated will be subjected to the highest
pressure?
On many modern tankers, which of the following
Flinger rings
devices is used to reduce cargo pump leakage to the
pump room bilge?
Moisture entering a typical refrigeration system will most boil in the condenser
likely __________.
"F" and "E"
"B" and "C"
"E" and "B"
GS-0028
GS-0137
Mechanical seals
Shaft sleeves
Clipper seals
be removed by the
liquid line strainers
cause sweating and
frost on the
evaporator coils
Distillate pump
freeze in the
expansion valve
In a two stage flash distilling plant, which of the pumps Condenser
listed is vented to the shell of the second stage in order circulating water
pump
to remove vapor from the pump suction?
Feedwater heater
drain pump
The component which is used to thoroughly separate
small, fine, dust-like particulate contamination from
hydraulic fluid is a/an __________.
accumulator
filter
Short cycling of the potable water pump is avoided by
the proper use of a __________.
hydro-pneumatic
hydro-pneumatic
tank completely filled tank filled with water
with compressed air
at system operating
pressure
Air ejector condenser
drain pump
separator
strainer
charge of air, at 20
psi (137.9 kPa)
above system
pressure with the
hydro-pneumatic
tank one quarter full
of water
charge of air, at
system pressure,
when the hydropneumatic tank is
half full of water
pillars
stanchions
columns
Vertical structural members used to support and
transmit downward forces of a load are called
__________.
Thermostatic steam regulating valves are used in heavy double bottom fuel oil supply of steam flow pressure of the fuel
fuel oil service systems to control the __________.
tank temperature
to the fuel oil heaters supplied to the oil
burners
all of the above
When the propeller blades are integral with the hub, the built up propeller
propeller is called a __________.
The best gasket material to use in cargo fuel oil lines is sheet asbestos
__________.
suction back
propeller
unvulcanized
packing
36
Illustr
solid propeller
oil-resistant sheet
packing
controllable pitch
propeller
cork sheet packing
attemperator steam
flow in the heater
discharge circuit
Book Num
Ans
11
543
C
11
544
D
11
545
A
Question
When fire safe or fire resistant fluid is to be used in a
hydraulic system, it is important that __________.
Moisture in a refrigeration system can cause
__________.
The reading indicated on a vernier micrometer caliper
scale is .4678 inches. Which of the figure in the
illustration represents this reading?
During the operation of the device shown in the
illustration, the required compressed air output has
stabilized within a pressure range of 100-110 psi. Which
of the following statements of operating conditions is
correct?
Answer A
the resultant
pressure, due to the
increase in fluid
viscosity, is not
excessive
freezing the
expansion valve
closed
Figure C
Answer B
the fluid does not
dissipate too much
heat
Answer C
the fluid be
compatible with all
seal materials used
Answer D
separate lube oil
supply be furnished
for the hydraulic
pump
corrosion of system
piping
improper
temperature
regulation
Figure E
all of the above
Figure D
Illustr
Figure F
GS-0083
Component "B" is
closed and will open
when output
pressure had
dropped below 50
psi.
Component "D" is
open and will close
when output
pressure rises above
110 psi.
Component "F" will
force "E" to be driven
to the full open
position.
Component "E" is
modulated
proportionally in
response to the
required output.
The process of grinding, shredding, or reducing the size detention
of sewage particles is known as __________.
maceration
bulking
chlorinating
Pillars
Girders
Bulkheads
All of the above
auto ignition point
flash point
burning temperature fire point
Figure B
Figure D
Figure F
11
547
D
11
548
B
11
549
D
11
550
D
11
551
C
11
553
C
In ship construction, which of the listed strengthening
members act to support the decks?
The lowest temperature at which fuel combustion
becomes self-sustaining in the presence of a source of
ignition, is defined as the __________.
The reading indicated on a vernier micrometer caliper
scale is .6383 inches. Which of the figure in the
illustration represents this reading?
What is the reading of the vernier micrometer caliper
scale shown in figure "D" in the illustration?
11
554
C
Which of the problems listed could be indicated if a
Proper refrigerant
sight glass in the refrigerant liquid line is full of bubbles? charge
11
557
B
GS-0120
Figure G
GS-0083
0.5110 inch
0.5160 inch
0.5320 inch
0.5350 inch
GS-0083
Faulty expansion
valve
Using the information in the illustration shown, the tail of designate the type of designate the
the welding symbol will __________.
weldment
welding
specifications
37
Insufficient
refrigerant
Solenoid valve stuck
open
specify the size of
weldment
specify the direction
of welding
GS-0030
Book Num
Ans
11
558
D
11
559
A
11
560
A
11
561
562
C
11
563
D
11
564
B
11
566
D
567
Answer B
bonnet, flange
gaskets should be
renewed if they were
cut or torn
Answer C
Answer D
stem packing should all of the above
be renewed if the
packing has
hardened, the glands
have bottomed out,
or the glands cannot
be tightened
Vertical support members used to strengthen bulkheads
are called __________.
In diagram "A", shown in the illustration, at what draft
does the vessel displace 3000 tons?
Design characteristics of lubricating oil sump tanks will
include __________.
stiffeners
panels
stanchions
brackets
9 ft
6 ft
3 ft
None of the above
You would open the illustrated valve "A" by
__________.
turning the
handwheel
clockwise, as viewed
from the top
A
11
11
Question
Answer A
During routine maintenance the bilge manifold valves
disks and seats
are removed. Prior to resecuring the valve bonnets, the should be checked
valve __________.
and lapped if
necessary
C
installation of baffles sufficient capacity to cooling coils made of
to prevent excessive contain all the lube
welded seamless
sloshing of oil
oil in the system
steel pipe
except for the
contents of the
gravity tank
When changing to a fire resistant hydraulic fluid in a
seals
system, it is important to check the compatibility of the
new fluid with the system's __________.
Some refrigeration systems have chemical moisture
activate the driers
indicators installed in conjunction with the sight glass in
the liquid line. If excess moisture is present in the
system, the indicator will __________.
Which of the following statements describes the
functions of a reservoir used in a hydraulic system?
Dissipate heat
38
SF-0024
the bottom of the
sump should be
integral with the shell
plating
first loosening part
#4, opening the valve
then retightening part
#4
turning the
handwheel
counterclockwise, as
viewed from the top
first loosening part
#8, then turning the
handwheel
counterclockwise as
viewed from the top
metals and plating
paint
all of the above
change color
secure the
compressor
add a predetermined
amount of liquid drier
Trap foreign matter
Separate air from the All of the above
oil
The advantages of flash type evaporators, as compared less internal
higher temperature less hard scale
to submerged tube type evaporators, include
corrosion because of evaporation for lower formation in a flash
__________.
lower brine density
salinity of the
evaporator
distillate produced
Illustr
less feedwater
required for a flash
evaporator
GS-0140
Book Num
11
568
C
Question
The aft, starboard bilge-well can not be pumped out,
and back flushing has not been successful. The next
practical solution will be to carry out which of the
following actions?
11
569
D
The double bottom in a vessel is a space comprised of
__________.
11
571
C
11
11
572
573
Ans
A
C
11
574
A
11
575
C
11
576
D
11
577
B
11
578
B
The welding symbol as shown in the illustration uses a
circle to indicate a/an __________.
Compared to a constant pitch propeller, a controllable
pitch propeller __________.
579
D
Answer C
Take all necessary
steps to properly and
safely pump out the
affected bilge well,
then manually 'muck'
it out.
Answer D
Change over and
use one of the two
remaining bilge
pumps to dewater
the starboard bilge
well.
plating forming the
doubler plating
engine room tank top installed over the flat
keel plate
plug weld
field weld
a watertight
boundary formed by
the inner bottom
all around weld
compartments
between the inner
and outer bottoms
round fillet weld
more efficiently uses operates at a lower
available engine
efficiency at a fixed
power
speed
produces the same
torque at lower
engine power
develops its rated
power at a lower
speed
"E"
"A"
"B"
While responding to a right full rudder command from
the amidships position, which of the cylinders illustrated
will be fully pressurized on the face of the pistons?
Answer B
Place 20 gals. (75.7
L) of fuel oil tankwash into the
affected bilge well for
one hour to dissolve
the stoppage.
"C"
Illustr
GS-0030
GS-0104
A liquid indicator sight glass is useful in determining
whether or not a refrigeration system is sufficiently
charged. It is generally located in the __________.
high pressure liquid
line
low pressure liquid
line
high pressure vapor
line
low pressure vapor
line
The tool best suited for cutting pipeline flange gaskets
to the correct size is __________.
A hand hacksaw blade is normally installed in the saw
frame with the teeth pointing away from the saw handle,
because __________.
One distinct advantage of flash type evaporators, as
compared to most other evaporators, is that in a flash
evaporator shell __________.
a pair of tin snips
a jack knife
a gasket cutter
a ball peen hammer
the blade will always
break if installed
otherwise
high temperature
distillate can be
recirculated to induce
additional flashing
cutting fluid must
flow down the teeth
the blade will
overheat if installed
otherwise
scale formation is not cold shocking is
a severe problem
more effective in
removing scale
cutting pressure is
most easily put on
the forward stroke
water purity is greatly
increased at high
capacity
Remove the effected Simultaneously
bilge manifold valve operate all available
and attempt to back bilge pumps.
flush the line.
Transfer half the
contents of a drum of
degreaser into the
bilge well and pump
out the bilge well with
the system.
The bilge system is unable to pump out the aft
Send the wiper into
starboard engine room bilge-well due to the bilge-well
the bilge-well with a
suction being fouled. With two feet of water over the top scoop and pail.
of the bilge-well, which of the following actions should
be carried out?
The purpose of swash bulkheads is to __________.
11
Answer A
List the ship to port in
order to pump out
the bilges for the
remainder of the
voyage.
minimize the effect of restrict flooding
a listing condition
within a tank
39
separate cargoes in
a common tank
reduce liquid
movement and
surging within a tank
Book Num
11
581
Ans
D
11
582
B
11
583
B
11
584
C
11
586
B
11
589
D
11
591
Question
Answer A
Which of the following statements is correct concerning Condensate will flow
the operation of the bucket type steam trap shown?
from the valve
opened by the rising
bucket.
592
B
11
593
C
11
594
B
11
595
C
11
596
A
Answer C
Answer D
Condensate flow is The valve is opened
continuously
by the sinking
controlled by the
bucket.
permanently
maintained operating
level of the bucket.
A hacksaw blade is normally placed in the saw frame
with the __________.
maximum possible
teeth pointing away
tension on the blade from the handle
Dual electro-hydraulic steering units usually operate
__________.
with both pumps on with one pump on
line at the same time standby
If a liquid sight flow indicator in a refrigeration system
shows gas bubbles in motion passing inside of the
glass, there is __________.
too much refrigerant oil entrained in the
in the system
refrigerant
Diamond point chisels are best used for cutting
__________.
oil grooves in
bearings
V-grooves and inside holes through metal
sharp angles
plate
keyways having
square corners
In ship construction, the hull frame members extending
athwart ship are called __________.
An S-type trap and drain is used __________.
deck frames
stringer frames
longitudinal frames
transverse frames
for all lavatory sink
installations, as no
other drain type is
useable
whenever the 'gray'
water drain system
connection is located
in the deck
whenever the 'gray' as a condensate
water drain system
drain for
connection is located superheaters
in a bulkhead
To properly install a new blade in a hand hacksaw
frame, the __________.
teeth should point
toward the handle
If one hydraulic pump of an electro-hydraulic steering
unit fails, the vessel's steering can be maintained by
using the __________.
A sight glass is installed in the liquid line to indicate the
condition of the refrigerant charge and may also
indicate the __________.
To accurately cut the proper size gasket for installation
in a pipeline, you should use __________.
trick wheel
teeth should point
blade should be kept blade can be
away from the handle loose in the frame
installed in any
position for normal
use
accumulator
standby pump
telemotor
condition of the
expansion valve
moisture in the
system
tin snips
Which of the figures shown in the illustrations depicts
an orthographic projection?
A
B
11
Answer B
The bucket will not
open the valve until
the trap has been
completely filled with
condensate.
40
blade tooth set
adjusted for
maximum cutting
width
with the follow-up
gear disconnected
Illustr
GS-0048
teeth angled toward
the saw handle
only when the rudder
is moved amidships
less than a full
ice crystals forming
charge of refrigerant in the refrigerant
in the system
a jack knife
condition of the
compressor suction
valves
a gasket cutter
a pair of nail clippers
B
C
D
condenser
temperature
GS-0142
Book Num
11
11
598
599
Ans
Question
If one of the bilge system manifold valves does not
properly seat, the __________.
B
B
Answer A
bilge well connected
to that valve, plus the
second bilge well
being pumped will be
completely emptied
The portion of a mechanism that utilizes manual
rheostat
positioning, or automatic indexing, is known as a detent.
An example of a detent used aboard ship can be found
in a/an __________.
In certain circumstances, weldments are preheated
reduce internal
before each pass to __________.
stresses
Answer B
bilge system will lose
vacuum and prevent
the other bilges from
being pumped out
Answer C
bilge well aft
connected to that
valve will siphon its
contents to the
forward bilge wells
Answer D
all of the above
engine order
telegraph
valve handwheel
fuel/air ratio control
knob
increase the
allow the use of
eliminate the need
temperature gradient smaller welding rods for post heating
in the weld area
11
600
A
11
601
D
The sectional lines drawn within the flange sections,
shown in the illustration, indicate the __________.
603
B
Which of the filter/strainer units listed permits you to
Simplex
clean the element while leaving the system on the line?
Duplex
11
the system is fully
A liquid sight flow indicator in a refrigeration system is
examined and gas bubbles are noted in motion with the charged
fluid flow. This means __________.
there is air leaking in ice crystals are
from the condenser forming in the
refrigerant
the system contains
less than a full
charge of refrigerant
A manual process used to remove small irregularities
by grinding the contact surfaces together of a valve, is
called __________.
The thickest deposit of scale in a flash evaporator is
most likely to occur in the tubes of the __________.
spotting-in
honing
refacing
distillate cooler
first stage condenser saltwater feed heater flash chamber
During the normal operation (air supply 50-100 psi) of
the device shown in the illustration, which of the
components listed below will be open?
When a linear actuator (cylinder) is being retracted
without an applied load, the pressure on the oil leaving
the 'cap end' will be __________.
B
D
A recirculating line is provided in the potable hot water
system to __________.
maintain uniform inlet maintain flow rates
conditions for the
which will eliminate
pressure tanks
fluid film formation in
the piping
11
604
D
11
605
C
11
606
C
11
607
A
11
11
608
609
D
D
Illustr
direction of machine fit-up of flange parts
cutting
flange surface finish
roughness
type of flange
material
Canister
Bypass
lapping-in
G
GS-0018
H
GS-0120
zero
inversely proportional inversely proportional increased as the
to the speed of
to the flow rate at the speed of retraction
retraction
rod end
increases
41
return overflow from
the pressure tanks
back to the potable
water tanks
maintain the desired
temperature range
throughout the
system
Book Num
Ans
11
613
A
Question
Which of the figures illustrated correctly identifies the
position the journal will assume in its bearing after it has
attained operating speed?
For cutting thin tubing or sheet metal, the proper
hacksaw blade should have __________.
The reading on the vernier caliper scale shown in figure
"G" in the illustration is __________.
The action necessary to use the steering gear room
trick wheel when transferring the steering control from
the wheelhouse to local control, is to __________.
be light green
show bubbles
614
D
In an operating refrigeration system low on refrigerant, a be clear
liquid line sight glass will __________.
be blue
11
615
B
Heat transfer is
restricted.
Valve seat will be
damaged.
Bonnet corrosion
may result.
11
616
B
Why should the use of metallic or semi-metallic packing
hooks or pullers be avoided on bronze or brass shafts,
rods, plungers, or sleeves?
Less scale formation occurs in a flash evaporator than
in a submerged tube evaporator because __________.
Scoring may result.
11
the distillate
produced has greater
purity
B
no boiling occurs on
heat transfer
surfaces
C
evaporation occurs
at a higher rate
the incoming feed is
at a higher
temperature
E
11
617
D
11
610
D
11
611
D
11
612
B
11
618
D
619
A
11
621
D
11
622
B
11
624
B
11
625
B
Answer B
B
Answer C
C
Answer D
Illustr
D
GS-0121
the teeth pointing
towards the handle
2.308 inches
the blade and teeth
of 'all-hard' quality
2.368 inches
align the trick wheel
to the rudder angle
position before
engaging
Which of the components listed will be open during the
start-up mode (air supply 0-50 psi) of the device shown
in the illustration?
As a rule of thumb, when pressure is applied to
not be compressed,
hydraulic oil, the oil will __________.
as liquids are not
compressible
The inner bottom of a ship is the __________.
11
Answer A
A
14 teeth per inch
32 teeth per inch
2.380 inches
2.965 inches
set the six-way
control valve in the
trick wheel position
open the power
transfer switch
before engaging the
trick wheel
always place the
rudder in the midship
position to engage
the trick wheel
D
GS-0120
reduce in volume by increase in volume
1% for every 100 psi by 1% for every
increment
1,000 psi increment
reduce in volume by
1/2% for every 1,000
psi increment
plating forming the
doubler plating
watertight boundary compartment
engine room tank top installed over the flat formed by the skin of between the tank top
keel plate
the ship
and skin of the ship
When listed by pitch, which of the hacksaw blades
14 teeth per inch
listed would be the most suitable for cutting thin tubing?
18 teeth per inch
24 teeth per inch
32 teeth per inch
Vessel propellers are classified as being right hand or
the bow
left hand. A right hand propeller turns clockwise when
viewed from __________.
Which of the listed reasons could cause frost to form on Shortage of
the suction line of a refrigeration compressor?
refrigerant in the
system.
To properly remove packing from a valve stuffing box,
sharpened rod of
you should use a __________.
silver solder
the stern
the port side
the starboard side
Expansion valve is
stuck open.
Liquid line service
valve is closed.
packing puller
chisel and hammer
Condenser cooling
water temperature is
too high.
screw driver
42
GS-0082
Book Num
Ans
11
626
A
11
629
C
11
631
C
11
632
B
11
633
C
11
634
C
11
635
A
11
636
C
11
638
C
11
639
B
11
641
C
11
642
C
11
643
C
Question
The primary reason low pressure evaporators produce
distillate more efficiently, and with less scale formation,
than high pressure evaporators is __________.
Answer A
evaporation is
accomplished in a
vacuum
Answer B
due to the higher
temperature of the
incoming feed
The outer strake of the inner bottom on each side of the
ship is called the __________.
The rubber bladder or separator bag installed in a
hydraulic accumulator should only be filled with
__________.
When drilling holes larger than 1/2 inch, a smaller pilot
hole should be drilled first to __________.
rider plate
outer plate
Answer C
Answer D
due to the latent heat evaporation in a
of evaporation
submerged medium
principle
produces more
distillate
margin plate
stealer plate
pure water
pure oxygen
dry nitrogen
dry hydrogen
allow the use of a
drill with a lesser lip
clearance angle
The starboard ram
will extend aft.
increase the cutting
speed of the drill bit
If the refrigeration compressor crankcase is sweating,
the cause may be due to __________.
ensure the maximum provide a path for the
cut by the large drill dead center of the
drill
The rudder stock "G" Only hose "J" will be
turns
placed under
counterclockwise.
pressure during this
maneuver.
a shortage of
the compressor
refrigerant
running continuously
liquid refrigerant
returning to the
compressor
the compressor short
cycling on the high
pressure cutout
Copper coil tubing is best cut with a __________.
The illustration shown is called an exploded drawing
and is intended to show the __________.
tubing cutter
internal shape of all
component parts
hand hacksaw
total number of parts
in the assembled
component
pipe cutter
parts aligned in the
correct order of
reassembly
When normal operating pressure is applied to the
hydraulic oil used in a high-pressure system, the oil
__________.
In a longitudinally framed ship, the longitudinal frames
are held in place and supported by athwart ship
members called __________.
Which of the listed components of a hydraulic system
would enable the pump to be temporarily shutdown, and
yet still provide an instantaneous source of hydraulic
force?
To cut angle iron and heavy pipe with a hand hacksaw,
you should use a blade with what number of teeth per
inch?
The figures shown in the illustration shows two different
positions of the same steering gear hydraulic pump.
Which of the following statements is correct?
viscosity will
decrease
flare cutter
disassembled
component in a one
point perspective
view
volume will increase volume will decrease pour point will be
reduced
stringers
web frames
pillars
brackets
Modulator
Pressure
compensator valve
Accumulator
Sump actuator
14
18
24
32
Changing from
position I to position
II will change the
direction of pump
rotation.
Position I is changed
to position II by the
follow-up gear as the
desired rudder angle
is approached.
Changing from
position I to position
II will always reverse
the direction of fluid
flow.
Changing from
position I to position
II requires a position
change of the sixway valve.
Which of the following actions will occur with the
steering system shown in the illustration when
responding to a left rudder command from amidships?
43
The six-way valve
"N" will be opened.
Illustr
GS-0137
GS-0025
GS-0102
Book Num
Ans
11
644
A
11
646
B
11
647
B
11
648
D
11
649
C
11
650
D
11
653
C
11
654
D
11
658
D
Question
If the suction line between the evaporator and
compressor is frosting up, the cause may be due to the
thermal expansion valve __________.
Most solenoid valves are actuated by __________.
Answer A
Answer B
Answer C
thermal bulb coming needle valve is stuck thermal bulb is in a
loose from the
closed
cold air stream
suction line
a spring
an electromagnet
the force of gravity
a constant capacity
unit
a diesel engine air
start unit only
Increased internal leakage, in addition to poor hydraulic
system response, and inadequate lubrication, is the
result of __________.
The structural members of the hull extending in a fore
and aft direction are called __________.
The minimum number of crew members permitted by
law to operate your vessel can be determined by
checking the __________.
When there is no movement of the rams on an electrohydraulic steering gear, the tilting box of the running
pump is __________.
If a refrigeration compressor crankcase is sweating, the
trouble could be caused by __________.
pump bearings in
poor condition
excessively worn
actuator-piston
packing
joiners
broken directional
control valve
centering springs
longitudinals
Which characteristic or condition will have the greatest
effect on increasing a hydraulic oil's viscosity?
Pour point
Cloud point
In merchant ship construction, the term 'scantlings'
refers to the __________.
hull girder strength in designed size of the
terms of the standard beams, stiffeners,
model
and shell plating
reduce cutting speed change to a finer cut increase cutting
and pressure
blade
speed and pressure
frames
set for maximum
torque
in the neutral position rotating backwards
Certificate of
Inspection
excessive superheat a minor amount of air normal oil circulation the expansion valve
in the system
with the refrigerant
being stuck in the
open position
Vacuum
659
C
11
660
C
Before boring a blind tapered hole, a good shop
practice to follow is to __________.
11
662
B
When coming to the end of a cut using a hand
hacksaw, you should __________.
stop applying the
cutting fluid
Rotation of the steering wheel on the navigation bridge
initiates oil pressure being applied to the steering gear
rams by __________.
regulating the oil flow moving the automatic moving the follow up
with the six-way
differential valve
indicator which
valve
regulates the six-way
valve
D
knees
Master's crew list
11
663
a constant pressure
unit while operating
under all load
conditions
low hydraulic oil
viscosity
Muster List ("Station A. B. S. Certificate
Bill")
on the purge and
vent stroke
44
Illustr
refrigerant pressure
The air compressor shown in the illustration, when used an on-off cycle unit
aboard a vessel is typically operated as __________.
factor of safety
involved with the hog
and sag
characteristics of the
hull
use a tapered
reamer
11
Answer D
all of the above
Pressure
ICE strength
classification of the
hull
drill to the large
drill to the small
bore a straight hole
diameter of the taper diameter of the taper
varying the angle of
a tilting box or
eccentricity of a
floating ring
GS-0119
Book Num
Ans
11
664
B
11
665
B
11
666
B
11
668
B
11
669
D
11
670
C
11
671
D
11
672
D
11
673
D
11
674
C
11
675
D
11
676
D
11
677
B
Question
Frosting or sweating of the suction line of a
reciprocating refrigeration compressor indicates a
condition which could result in severe damage due to
__________.
A knocking sound from one cylinder of an operating air
compressor indicates __________.
In order to take suction on the lube oil drain tank
cofferdam with the bilge pump shown in the illustration,
how many suction side valves must be open?
Sluggish response or action of the hydraulic actuators
may be a result of __________.
Answer A
Answer B
minor amounts of oil liquid slugging
in the refrigerant
Answer C
insufficient
refrigerant
Answer D
a failed heat
interchanger
a defective or broken a loose valve plate
high pressure
unloader
One
Two
excessive overload
no compression
Three
Four
Illustr
GS-0042
insufficient load
excessively high oil
viscosity
relief-valve pressure reservoir level being
setting too high
maintained two
inches above normal
interlocking flexible
claws
internal gear ring
special bolts and
flexible rubber inserts GS-0143
The valve labeled 'V-4', for the illustrated device, is the pump suction valve oily water inlet valve
__________.
The purpose of an accumulator in a hydraulic system is collect any dirt in the collect fluid from any
to __________.
system
small leak
processed water
discharge valve
preheat the fluid
during cold weather
oil drain control valve
A swing check valve is used in a pipeline to
__________.
maintain a preset
pressure on the line
closely regulate the
amount of flow
relieve excessive
pressure on the line
When the desired rudder angle is attained by a typical
double ram electro-hydraulic steering gear, the
__________.
ram relief valves
bypass oil to stop
rudder movement
six-way valve shifts
to the neutral flow
position
A refrigeration system compressor crankcase is
sweating or unusually cold. This is an indication of
__________.
A hacksaw blade will start a cut more easily if you
__________.
a shortage of
refrigerant in the
system
apply maximum
pressure at the start
of the cut
decreased
clearances between
rotating parts
steering pump
electric motor is deenergized by the
transfer switch
air in the system
an accumulation of
liquid refrigerant in
the crankcase.
coat the saw blade
turn the saw blade at
with soap before
right angles to the
starting the cut
saw frame
decreased slippage air binding in the
to the suction side of discharge ports
the pump
act solely as a heat
exchanger
act as a lube oil
sump
The shaft coupling for the illustrated pump is rotated by wire serpentine grid
the motor coupling using a/an __________.
Operating a rotary pump at speeds in excess of design
requirements could cause __________.
One of the functions of the component labeled "E",
shown in the illustration, is to __________.
45
provide storage for
compressed
cryogenic gases
GS-0113
store potential
energy in the form of
hydraulic fluid under
pressure in the
system
allow flow in one
direction only
follow-up gear takes
the hydraulic pump
off stroke
a shortage of oil in
the crankcase
file a nick where the
cut is to be started
erosion and
excessive wear
act as a cyclonic
pneumatic
dehydrator
GS-0119
Book Num
Ans
11
678
A
11
679
A
11
680
C
11
682
B
11
11
11
11
11
683
684
685
687
688
C
B
Question
A solenoid, direct-acting, three-position, springcentered, directional control valve is used in a hydraulic
system to control a linear actuator. Midway through
extension, the push button is released, but the actuator
continues to extend slowly. Which
Answer A
A centering spring
has broken and
jammed the spool
movement
preventing the spool
from recentering.
Answer B
One of the two
solenoids has
sustained an open in
its respective coil.
Answer C
The pump coupling
has been damaged
preventing the pump
from developing its
required operating
speed.
Answer D
The detent
mechanism has
failed, preventing the
valve from operating.
In ship construction, structural hull members installed
athwart ship are __________.
In accordance with the Coast Guard Regulations (46
CFR), which of the following situations requires an
official logbook entry and is considered the
responsibility of the chief engineer?
deck beams
stringers
girders
breast hooks
Ensuring that the
emergency lighting
and power systems
are operated and
inspected at least
once in each week
the vessel is
navigated.
Seeing that all
lifeboat winch control
apparatus including
motor controllers,
limit switches, etc.
are examined at
least once in each 3
months.
Obtaining a sample All of the above.
of all fuel oil received
on board to be used
as fuel along with
ascertaining all
particulars such as
vendor, producer,
flash point, etc.
The illustrated valve is known as a __________.
lift gate valve
swing check valve
swing globe valve
When the helm demands a 20° right rudder movement
from an electro-hydraulic steering gear, which of the
listed actions will be the FIRST action to happen when
this rudder position is attained?
Refrigeration system compressor crankcase sweating is
an indication of __________.
The six-way valve
opens.
The steering service The follow-up gear
takes the pump off
pump motor is
stroke.
stopped.
insufficient lube oil
circulating through
the system
excessive circulation insufficient
refrigerant in the
of lube oil through
the system
system
Which of the following is/are true concerning the pump
shown in the illustration?
For classification
purposes the pump
would be termed end
suction.
The impeller wearing The casing is of a
All of the above.
ring would be
double volute design.
identified by piece
#8.
The device shown in the illustration is lubricated by
__________.
air pressure forcing
lube oil to areas of
friction
a small spur gear
pump
A solenoid direct-acting three-position spring-centered
directional control valve is used in a hydraulic system to
control a linear actuator. When the remote push button
is depressed to extend the actuator it fails to move,
even though the pump is in o
A spring at one spool The 'extend' solenoid
end has broken and coil has developed
jammed, preventing an open.
the spool from
shifting.
D
A
D
46
splash-type
lubrication provided
in the compressor
butterfly lift valve
Illustr
GS-0056
The cylinder relief
valves bypass oil to
the suction side of
the pump.
an overworked
compressor
gravity feed provided
by component "A"
The pump coupling is Any one of the above
damaged and pump will cause the
is unable to turn at its actuator to not move.
required speed.
GS-0143
GS-0119
Book Num
Ans
11
689
C
11
690
D
11
691
B
11
693
694
D
11
695
C
11
696
B
11
697
B
698
Answer A
rudder frame
Answer B
rudder post
Answer C
rudder stock
Answer D
stern post
Needle
Tapered roller
Roller
Ball
number of holes
involved
remove all hydraulic
system pressure and
bring the pneumatic
pressure to the
accumulator preload
pressure
number of threads
per inch
remove all hydraulic
system pressure and
bring the pneumatic
pressure to the
system's design
pressure
size of hole
tightness of fit
increase the
pneumatic pressure
until the hydraulic
system reaches its
design pressure
allow the
accumulator to
completely fill with
gas charge at
atmospheric
pressure, shut off the
air chamber, and add
hydraulic fluid until
proper pressure is
reached
Sweating of the refrigeration system compressor
crankcase is caused by __________.
too much superheat
insufficient superheat suction pressure too excessive refrigerant
low
returning to the
compressor
The pump shown in the illustration is a __________.
piston pump
diaphragm pump
A
11
11
Question
A vertical shaft having a rudder attached to its lower
end and having a yoke, quadrant, or tiller fitted to its
upper portion by which it may be turned, is the
__________.
Which bearing will carry the load on two small points
diametrically opposite to each other?
The notation '10-24 tap' appears on a drawing. The
number "24" indicates the __________.
To charge a bladder type hydraulic accumulator
__________.
B
centrifugal pump
An increase in rotor clearances in a rotary pump will
__________.
increase discharge
pressure
decrease pump
capacity
decrease pump
cavitation
reciprocating pump
with piston valve
gear
decrease reaction
ring clearance
Lubricating oil is added to the device shown in the
illustration by using the component labeled
__________.
Air entrained in the hydraulic fluid, or trapped in an
actuator will cause the actuators to move with a jerky
motion. This action is a result of __________.
D
F
M
R
Illustr
GS-0012
GS-0119
the trapped air being
compressed to a
pressure above the
maximum pump
discharge pressure,
then re-expanding
and lowering in
pressure after the
actuator moves
47
the trapped air being
compressed to
operating system
pressure, then
dropping in pressure
as the actuator
moves, allowing the
air to re-expand, then
repeating the
process
air being capable of
moving loads more
effectively than a
liquid
air providing better
lubrication of internal
components, found
in Hydraulic
Systems, than
hydraulic fluids
Book Num
Ans
11
700
A
11
701
C
11
703
B
11
704
C
11
705
D
11
11
11
706
707
708
B
Question
Answer A
The mutual action between parts of a material to
stress
preserve their relative positions when external loads are
applied to the material, which tends to resist
deformation when subjected to external forces, is
known as __________.
The needle valve (piece #3) shown in the illustration, is press fit
held in the test valve body (piece #2) by a __________.
In an electro-hydraulic steering system, rudder
movement is maintained in close synchronization with
the steering wheel position by means of the
__________.
Crankcase sweating in a refrigeration system is caused
by __________.
The letters 'NC' in '1/4-20 NC' indicates the bolt is
__________.
The pump shown in the illustration can best be
described as a centrifugal __________.
709
trick wheel
follow-up control
six-way valve
Rapson slide
a stuck solenoid
valve
made of nickelcadmium metal
a shortage of
refrigerant
made of noncorrosive metal
too much oil in
circulation
not clad with any
coating
too much superheat
The device shown in the illustration is used to
__________.
pump cargo oil or
bilges
circulate refrigerant
through the ships
service refrigeration
system
compress air
Air trapped in one end of a hydraulic actuator may be
indicated by __________.
erratic or jerky
motion of the
actuator
a pump discharge
pressure that is
consistent, but higher
than normal
Provisions are made
through simulation or
actual condition for
testing all audible
and visual alarms
and indicating lights.
consistently faster
over speeding of the
response or
pump
movement of the
actuator
All alarm circuits
All of the above.
should be in
operation when the
system is on the line.
name of the vendor
name of the oil
producer
interference fit
clearance of .005
inch
flash point (closed
cup method) of the
fuel oil certified by
the producer
running fit
710
D
11
711
A
A chief engineer's responsibilities include making
logbook entries whenever fuel oil is received. In
accordance with Coast Guard Regulations (46 CFR),
this log entry must include the __________.
Figure "B", shown in the illustration, is dimensioned to
indicate a/an __________.
48
Illustr
GS-0020
threaded with
national coarse
threads
single stage pump
single stage pump
multistage pump with single stage pump
with a single suction with a double suction with a single suction
a single suction
closed impeller
open impeller
closed impeller
closed impeller
D
11
Answer D
ultimate tensile
strength
fillet weld
Which of the following statements is true concerning the Nonvital alarms are
instrumentation or alarms provided at the main control separated from vital
station for an automated main propulsion plant?
alarms.
11
Answer C
shear strength
spring loaded clamp machine screw
thread
C
A
Answer B
strain
GS-0012
separate large
quantities of oil-water
emulsions
GS-0119
all of the above
tolerance of .005
inch
GS-0019
Book Num
11
714
Ans
B
Question
If a refrigeration system compressor crankcase is
sweating, you should __________.
A P-type trap and drain is used __________.
11
715
C
11
716
B
11
718
B
11
719
D
11
720
B
11
721
B
11
722
A
11
723
B
11
725
A
Which of the following descriptions identifies the
centrifugal pump shown in the illustration?
Answer A
Answer B
add refrigerant to the adjust the thermal
system
expansion valve to
the proper setting
for all lavatory sink
whenever the 'gray'
installations, as no
water drain system
other drain type is
connection is located
useable
in the deck
Answer C
adjust the float valve
to the proper holding
pressure
whenever the 'gray'
water drain system
connection is located
in a bulkhead
Answer D
open the hand
expansion valve
Illustr
Single inlet and dual Single inlet and one
direction of rotation direction of rotation
Double inlet and dual Double inlet and one
direction of rotation direction of rotation
GS-0130
as a condensate
drain for
superheaters
When new piping sections have been fabricated for
cleaned using a
installation in a hydraulic system, prior to installation the water-based
piping should be __________.
detergent
descaled by using a
pickling solution
hydrostatically tested all of the above
to 100% of maximum
working pressure
A cofferdam is a/an __________.
empty space
between tank tops
and bilges
cement baffle in a
fresh water tank
tank for storing
chemicals
If the drill point lips are ground at different angles, the
drill will __________.
Proper hacksaw cutting is accomplished when pressure
is applied only on the __________.
In order for the vessel to discharge its cargo to a shore
facility from #6 centerline tank, with the #7 main deck
manifold valve open, which of the listed valve
combinations, shown in the illustration, must be opened
and which of the valves must be closed
overheat rapidly from cut an oversized hole cut a continuous chip
rubbing
backward stroke
forward stroke
front of the hacksaw
frame
1, 2, 4 and 9 open 3, 1, 4, and 10 open 2 1, 2, 5 and 6 open 3
5, 6, 8 and 10 closed closed
and 4 closed
Before performing any maintenance on a hydraulic
system storing energy in an accumulator, you should
__________.
pressurize the
system to test for
leaks
The term '5/16-24' describes __________.
machine bolt size
steel plate gauge
and threads per inch size and thickness
empty space
separating
compartments to
prevent the contents
of one compartment
from entering
another in case of
leakage
jam in the hole and
break
top of the hacksaw
frame
All valves are open
to gravitate
GS-0139
49
bleed off all pressure operate the machine disconnect the pump
within the system
until it reaches
pressure control
normal temperature switch
bearing puller size
cutting torch tip size
Book Num
11
11
11
726
727
728
Ans
Question
A multistage centrifugal pump can be BEST described
as having __________.
Answer A
two or more
impellers housed
together in one
casing and mounted
on a single shaft
Answer B
a single stepped
impeller mounted in
a progressively
staged casing
Answer C
a large radial
clearance between
the impeller and
casing to prevent
overheating due to
friction
Answer D
an increase in the
discharge velocity of
the liquid with a
corresponding
decrease in pressure
through the stages
The major difference between the discharge and
suction valves installed in most low pressure,
reciprocating air compressors is that __________.
one valve seats
upwards, while the
other seats
downwards
the reed valves used
on the discharge are
made substantially
thicker and heavier
than the suction
valves
the suction valve
springs exert a
greater tension than
the discharge valve
springs
the discharge valve
springs exert a
greater tension than
the suction valve
springs
If you attempt to tighten a leaking hydraulic fitting with
pressure on the system, you will __________.
be successful every
time
find that the pressure cause the system to
will prevent the
vibrate
components from
being tightened
where possible, be
made between the
tenth and fourteenth
month of the period
for which the
certificate is valid
be preceded by
written application by
the master, owner, or
agent of the vessel
be undertaken only all of the above
when all cargo tanks
are empty, gas free,
and made accessible
for internal
examination
apparent slip
true slip
pitch
propulsive efficiency
provide a means of
supplying sealing
fluid for the impeller
shaft stuffing box
enable the pump and
its suction line to
remain primed prior
to starting the pump
afford the pumping
system protection
against water
hammer and surging
A
A
B
11
729
A
The annual reinspection of a tank vessel, holding a two
year Certificate of Inspection endorsed, 'Inspected and
Approved for the Carriage of Flammable or Combustible
Liquids of Grade A', must __________.
11
730
A
Propeller pitch speed minus ship speed divided by the
propeller pitch speed is termed __________.
11
11
731
732
C
C
11
733
A
11
734
A
As sometimes utilized with centrifugal pumps operating give the pump motor,
with a high suction lift, foot valves are primarily
or driver, positive
designed to __________.
protection when
operating in a shutoff
condition
3, 4, 7 and 9 open; 1,
Salt water ballast is to be discharged into the #6 port
and starboard wing tanks. Which combination of valves, 2, 5, 6 and 10
illustrated, must be opened, and which valves should be closed.
closed?
The follow-up gear
Which of the devices listed, when used on an electrohydraulic steering gear, keeps the movement of the
rudder closely in step with the steering wheel?
The sensible heat of air is dependent upon the
__________.
1, 2, 5 and 6 open; 4,
7, 8 and 9 closed.
The rudder angle
indicator
A rudder angle limit
switch
dry bulb temperature wet bulb temperature saturation
temperature
50
dislodge any scale in
the tubing, and it will
damage the system
1, 2, 7 and 9 open; 3, 1, 3, 5, 6, 8 and 10
open; 2, 4, 7 and 9
4, 5, 6, 8 and 10
closed.
closed.
The synchronous
electric transmitter
Illustr
water vapor
superheat
GS-0139
Book Num
Ans
11
735
D
11
736
D
Question
What should be done if localized scoring is discovered
on a pump shaft sleeve during routine maintenance
inspection?
The designation '1/4-20' describes __________.
11
737
D
11
739
C
11
740
A
11
741
C
11
742
B
11
743
B
11
744
D
11
745
D
11
746
C
Which of the following statements represents the path
of air flow passing through a typical two stage, low
pressure, reciprocating, air compressor?
Answer A
Reassemble the
pump and provide
more water leak off
for lubrication.
cutting torch tips size
Answer B
Check for parallel
alignment of the
sleeve radial face to
the sleeve bore.
pipe thread die size
Answer C
Reassemble the
pump and set the
governor to obtain a
slower speed.
steel plate thickness
Intercooler, L.P.
cylinder, H.P.
cylinder, and air
cleaner
A
L.P. cylinder, air
cleaner, intercooler,
and H.P. cylinder
Air cleaner, L.P.
cylinder, H.P.
cylinder, and
intercooler
J
A lightening hole, shown in the illustration, is identified
by the letter __________.
In accordance with Coast Guard Regulations (46 CFR), the port where the
vessel is
the hailing port marked on the stern of a vessel
permanently
indicates __________.
documented
H
Differential pistons used in some reciprocating air
compressors, serve to provide __________.
a means of
distributing side
pressures over a
wider area of each
cylinder
It is necessary to discharge salt water ballast into the #6 2, 3, 5 and 6 open; 4,
centerline tank. Which combination of listed valves
7, 8, and 9 closed
illustrated, must be opened and which valves must be
closed?
Before doing any work on a hydraulic system equipped drain the
with accumulators, you should __________.
accumulators and
purge with oxygen
a means of
unloading during
start-up
Which of the problems listed could cause erosion of the Overcharging the
expansion valve disks and seats?
system with
refrigerant
A pump shaft that is bent or distorted should normally
repaired by a
be __________.
suitable welding
process
The quantity and density of brine discharged from the
prevent scale
last effect of a flash type evaporator should be kept at a accumulation in the
constant value so as to __________.
first effect heat
exchanger surfaces
51
Answer D
Correct the cause of
scoring and install a
new shaft sleeve.
Illustr
machine bolt size
and threads per inch
Air cleaner, L.P.
cylinder, intercooler,
and H.P. cylinder
all of the above
GS-0086
the place in the same where one or more of all of the above
the owners reside
marine inspection
zone where the
vessel was built
more than one stage a variable
compression ratio
of compression by
each piston
enabling the output
to be varied to suit
any load condition
1, 3, 5, 6 and 9 open; 4, 7, 8 and 9 open; 3, 2, 5, 6 and 9 open; 1,
5, 6 and 10 closed
3, 6 and 10 closed
2, 4, 7, 8, and 10
GS-0139
closed
bleed off all stored
energy from the
accumulators
Faulty compressor
suction valve
completely charge
the accumulators to
prevent system
energy loss
Failure of the high
pressure cutout
pump the hydraulic
fluid into the
accumulators to
prevent fluid loss
Flash gas formed in
the liquid line
straightened by
applying heat and
torsion
maintain a constant
distillate outlet
temperature
reconditioned by
metalizing and
machining
ensure distillate
quality and distilling
plant efficiency
replaced with a
satisfactory spare
prevent any salinity
in the distillate
produced
Book Num
11
11
11
11
747
748
749
750
Ans
C
D
D
C
11
751
C
11
752
B
11
753
B
11
754
C
11
756
C
11
757
A
Question
Answer A
If an air compressor is used to supply compressed air to combustion control
outlets throughout the engine room and on deck of a
air system
vessel, the system is known as the __________.
Answer B
supply air system
If the hydraulic compression type tubing fitting, shown
as figure "C" in the illustration begins to leak, you
should __________.
replace part "III"
apply thread seal
tape around the
threads between part
"II" and 'IV', then
reassemble and
tighten
replace part "I"
2 years
4 years
5 years
purged
plugged
evacuated
apply more thread
seal and retighten
part 'IV'
An international and coastwise load line assignment
1 year
and certificate has been issued to a vessel by the
American Bureau of Shipping, under the authority of
Coast Guard Regulations (46 CFR), for a period of
__________.
dehydrated
When it is necessary to repair a refrigeration system
using R-134A and the system will be open for more
than a few minutes, the open ends of the system should
be __________.
The 'pitch' of a screw is the __________.
angle formed by
adjacent flanks of a
thread
Answer C
ship's service air
system
distance between
number of threads
divided by the length corresponding points
of the threaded
on adjacent threads
portion of the screw
The use of a needle valve in a piping system is
recommended when requiring __________.
The hydraulic tubing installation shown as figure "D" is
INCORRECT and will probably leak when in operation
because the tubing __________.
high pressure drops
close regulation of
flow
will contract in
and its fittings cannot
diameter and expand be properly installed
in length under
and tightened
pressure
no pressure drops
A constant hissing sound at the thermal expansion
valve will always indicates __________.
proper refrigerant
control
a faulty refrigerant
control valve
a lack of refrigerant
In a two stage flash type evaporator, the brine
overboard pump is vented directly to the __________.
saltwater heater shell first stage distilling
condenser
second stage flash
chamber
If an air compressor is used to supply air primarily to the control air system
combustion control system and other pneumatic
controllers, the entire system is known as the
__________.
52
forced draft air
system
Answer D
low pressure deck air
system
Illustr
GS-0100
angle of taper formed
by the centerline of
the screw and the
crests of the thread
no back flow
will stretch and
cannot flex at right
overstress the male angles to the
threads on the fitting pressure applied by
the fluid because it is GS-0065
not properly twisted
supply air system
the flow of 100%
liquid refrigerant
passing to the
evaporator
air ejector condenser
ships service air
system
Book Num
Ans
11
758
A
11
759
C
11
760
B
11
762
A
11
763
C
11
764
D
11
765
B
11
767
D
11
768
C
11
11
769
770
C
B
Question
The component of the illustrated compression fitting,
I
figure "C", used to seal and eliminate leaks between the
tubing and the fitting, is part __________.
Answer A
Answer B
II
Answer C
III
Answer D
Illustr
IV
GS-0100
A shot of anchor chain has a length of __________.
6 fathoms
12 fathoms
15 fathoms
45 fathoms
Air entrained in the hydraulic fluid, or trapped in an
actuator will cause the actuators to move with a jerky
motion. This action is a result of __________.
the trapped air being
compressed to a
pressure above the
maximum pump
discharge pressure,
then re-expanding
and lowering in
pressure after the
actuator moves
the cyclic expansion
and contraction of air
due to the motion of
the actuator
air being capable of
moving loads more
effectively than a
liquid
air providing better
lubrication of internal
components, found
in Hydraulic
Systems, than
hydraulic fluids
When replacing packing rings in the stuffing boxes of
reciprocating pump piston rods, the ends of the rings
should be cut __________.
Hydraulic system tubing should be anchored every
three or four feet to prevent __________.
square
beveled
step-designed
diagonal
excessive pump
cavitation
expansion and
contraction of the
tubing
tube fitting leaks from tube flexing at right
angles to the applied
vibration and
pressure surges
fluid pressure
A cracked diaphragm in a thermostatic expansion valve
will cause the valve to __________.
In order to distribute the side pressures over a wide
area of the cylinder walls and liners, which of the listed
types of pistons are used in modern low pressure air
compressors?
Which of the listed operating conditions would have the
greatest effect on the volumetric efficiency of an
operating reciprocating air compressor?
The components used to 'lock' the hydraulic tubing in
place when assembling the illustrated compression
fitting "C" are items __________.
Which of the listed systems related to an engineer's
signal alarm panel is required to be indicated by a
continuously illuminated light while in operation?
return to a neutral
position
Differential
flood the evaporator
open
close
Trunk
Barrel
Valve-in-head
The density of the air
entering the
compressor.
I and III
The temperature of
the air entering the
compressor
I and II
The designed
A leaking head
rotating speed of the gasket.
compressor.
II and III
III and IV
GS-0100
Deaerating tank low
level
Which of the following is the minimum internal diameter 1 1/2 inches.
of the main bilge suction piping permitted by Coast
Guard Regulations (46 CFR Part 56) on a vessel over
150 gross tons?
53
Shaft alley bilge high Port or starboard
level
steering gear motor
running
No. 1 diesel
generator low lube oil
pressure
2 1/2 inches.
4 1/2 inches.
3 1/2 inches.
Book Num
Ans
11
771
C
11
772
D
11
773
D
Question
Broken valve strips in an operating low pressure air
compressor will cause __________.
Answer A
Answer B
an immediate
oil contamination in
crankcase explosion the compressed air
During the inspection of a low pressure pump, the
replace the worn
wearing ring is determined to have a clearance of
wearing ring
0.011" - 0.013", you should __________.
Which of the listed illustrations shows the INCORRECT A
method for installing hydraulic tubing?
11
774
B
11
775
C
semi-open impeller
776
C
The impeller shown in the illustration is best described
as a/an __________.
axial flow impeller
11
11
777
B
prevent the valve
from wire drawing
11
779
D
11
780
B
A viscous film of oil collected between the valve face
and seat of a low pressure reciprocating air compressor
will __________.
Short cycling of the potable water system's pump is
prevented by using __________.
If the pump for a hydraulic anchor windlass is over
heating, the cause may be __________.
retard the opening
and closing of the
valve
variable speed
supply pumps
excessive pump
discharge pressure
have no effect on
compressor
operation
variable delivery
supply pumps
too low of a tilting
box angle
Compared to poppet and other mechanically operated
valves, which of the following advantages is gained by
using a thin plate (feather) low lift type valve in an low
pressure air compressor?
They improve
compression
efficiency.
They operate with a
minimum of noise.
They are simple and All of the above.
easy to replace.
11
782
783
D
A
11
784
C
11
785
D
Lube oil passing
through the system.
constant speed
supply pumps
increased pump
speed
According to Coast Guard Regulations (46 CFR), where readily accessible
compressed air shall
cargo pump shafts on tankers pierce bulkheads
gastight glands shall be used as the
__________.
be provided
primary means to
discharge cargo
Variable spring
tension caused by
the changing
temperature.
Diameter, length,
and number of
threads per inch
single suction closed
impeller
Frost on the liquid
line.
provide quieter valve
operation
a pressure gauge or
manometer shall be
installed on the
bulkhead to ensure
the gastight seal is
maintained
Diameter, head size,
and shoulder length
double suction mixed
flow closed impeller GS-0012
a hydro pneumatic
pressure tank
low pump speed
the glands are to be
kept under
continuous suction
with power ventilation
If a refrigeration compressor were short cycling on the
low pressure cutout switch, the probable cause for this
might be the __________.
system was
overcharged with
refrigerant
high pressure switch expansion valve
suction valves were
was improperly
strainers were fouled leaking slightly
adjusted
Machine bolts are identified by their __________.
type of head
major diameter and
length
54
Illustr
GS-0065
Moisture or foreign
matter collecting at
the valve seat and
orifice.
What basic dimensions are used in describing machine Diameter and length Diameter and cross
bolts?
only
section only
11
Which of the problems listed represents the major
difficulty encountered with thermal expansion valve
operation?
Answer C
Answer D
a decrease in
no immediate loss of
compressor capacity the compressed air
capacity
install a new
machine the worn
leave the existing
oversized casing ring wearing ring and refit wearing rings in
place
B
C
D
threads per inch
all of the above
Book Num
11
11
786
787
Ans
B
B
11
789
B
11
790
C
11
791
A
11
792
C
11
793
A
11
794
B
11
795
D
11
796
D
11
11
797
798
B
A
11
799
D
11
801
C
Question
A metal file has become clogged with filings and should
be cleaned with a file __________.
The function of the springs used with channel or platetype valves for reciprocating air compressors is to
__________.
Answer A
scraper
open the valves
during downward
strokes
Answer B
card
Answer C
oilstone
Answer D
dressing tool
provide positive
reduce compressor reduce air intake and
closing of the valves discharge pulsations exhaust pulsations
Where should you expect to find striking plates on liquid In the bow of the ship On the bottom of a
storage tanks?
at the waterline.
fuel or ballast tank
under the sounding
tube.
The part of the anchor windlass that engages the
warping head
fairlead
anchor chain for lifting is called the __________.
Air blowing from the intake air filter of an operating air
broken inlet valves
broken discharge
compressor indicates __________.
valves
Under the counter
above the propeller
blade tips.
On the cofferdam
manhole.
wildcat
capstan
pulsations in the air
distribution system
overloading of the air
distribution system
Which of the listed valve types is typically used for
suction and discharge valves on modern low pressure
air compressors?
When any low pressure distilling plant is operated with
less than the designed vacuum, the __________.
Poppet
Rotary
Reed
Sliding
heat level rises
heat level drops
capacity increases
scale formation
decreases
If a refrigeration crankcase compressor were short
cycling on the low pressure cutout switch, the cause
might be that the __________.
Heavy pressure on the ends of a file will cause the work
surface to become __________.
Which of the valves listed will be cycled from fully open
to fully closed when the handle is turned 90°?
system was
overcharged with
refrigerant
tapered
system was low on
refrigerant
suction valves were
leaking slightly
relief valve was
leaking slightly
smooth
rough
rounded
A rising stem gate
valve
A globe stop valve
A check valve
A butterfly valve
Which of the following problems would be the probable
cause for the faulty operation of a reciprocating air
compressor suction valve?
Carbon build up in
the piston ring belt.
Lifting of intercooler
relief valve.
In which of the listed hydraulic systems will the
installation of an oil cooler be necessary?
Constant tension
mooring winch
system
Faulty operation of a Compressor
cylinder unloader.
operation in an area
of high relative
humidity.
Hatch cover system Watertight door
system
In accordance with Coast Guard Regulations (46 CFR), one voyage only
a steam propelled cargo vessel over 25 gross tons may
have a Certificate of Inspection issued for __________.
a specific period of
time to cover a
described situation
In the illustration shown, an efficient seal is maintained
between the suction cover and the volute by
__________.
sealant between the an asbestos gasket
two parts
all of the above,
depending upon the
pertinent
circumstances
compressing the
packing rings
good metal-to-metal
contact
55
Illustr
a time period not
exceeding 2 years
Internal combustion
engine hydraulic
starter system
GS-0012
Book Num
11
802
Ans
B
11
803
D
11
804
C
11
805
C
11
806
B
11
810
C
11
812
D
11
814
B
11
815
A
11
816
A
11
817
B
11
818
A
Question
Answer A
Which of the following problems could cause air to blow Excessive
out through the inlet air filter of a running compressor? compression in the
cylinder
The striped flexible hose installation shown is incorrect expand under
and will probably fail under pressure because the hose pressure and split
will __________.
along the axis of the
stripe
A refrigeration unit will tend to short cycle when
under heavy loads
operating __________.
A vacuum is initially created in a flash type distilling
the flashing of the
plant by __________.
feed water
Most pump manufacturers recommend that the
discharge piping for centrifugal pumps be one size
larger than the pump discharge nozzle to __________.
reduce the pump
discharge pressure
Answer B
A broken intake
valve
flex and rupture at
expand in diameter
the twist indicated by and rupture in the
the stripe
twisted area
Answer D
Illustr
An improperly
adjusted discharge
valve
pull out of the fittings
as the hose contracts
GS-0064
in length
during hot gas
defrost
the condensation of
the saltwater feed
during starting
conditions
condensation of the
distillate
reduce the frictional
losses due to fluid
flow
Answer C
A dirty inlet filter
element
under light loads
air ejectors,
eductors, or a
separate vacuum
pump
increase the pump
discharge pressure
hold the anchor
chain while riding at
anchor
Which of the following problems can result in below
Defective pressure
Leaking intake
normal pressure in the intercooler of an operating low
pilot valve
valves on the high
pressure cylinder
pressure air compressor?
increase the high
If a refrigeration compressor is short cycling on high
purge the condenser check for proper
pressure cutout
head pressure, you should __________.
if the waterside is
water flow through
setting
dirty
the condenser
Which of the listed tools should be used to remove a
An arbor press
A steel drift pin and An acetylene torch
tapered roller bearing from a shaft?
hammer
and hammer
Most pump manufacturers recommended that the
one size larger than the same size as the one size smaller than
discharge piping for centrifugal pumps be __________. the pump discharge pump discharge
the pump discharge
nozzle
nozzle
nozzle
If all of the air charge has been lost from a ship service fail to work, and the fail to function as
still function normally
air receiver, the compressor mechanical unloading
drive motor will trip
designed, but the
at start-up
system will __________.
the circuit breaker as compressor having
the compressor will no load will start with
be overloaded
little or no difficulty
The principal purpose of an anchor windlass chain
stopper is to __________.
tie off the warping
head lines
If the fixed orifice in the evaporator steam supply line
be unable to
were to be removed, the steam pressure reducing valve maintain steam flow
located upstream would __________.
unless the proper
range spring were to
be installed
56
absorb the brake
thrust of the anchor
windlass
Defective receiver
relief valve
be suitable for
maintaining the
required steam flow
under all load
conditions
allow rapid venting of
entrained air
lock the intermediate
clutch shaft to the
wildcat
Leaking discharge
valves on the low
pressure cylinder
reduce the cooling
water flow
A tapered 'come-along'
installed with a short
radius elbow at the
pump
Still function
normally, but the
safety interlock will
stop the drive motor
handle the operation all of the above
satisfactorily as the
control orifice
develops an
impedance to the
steam flow
Book Num
Ans
11
819
D
11
820
C
11
821
C
11
822
A
11
11
823
824
A
B
11
825
D
11
826
C
11
827
C
11
828
A
11
830
C
11
832
C
11
833
A
Question
Every automated machinery plant must have an
'engineer's assistance' alarm. Power for this alarm
should be taken from the __________.
The reading indicated on a vernier micrometer caliper
scale is .3101 inches. Which of the figure in the
illustration represents this reading?
How many cap screws are used to secure the motor
bracket to the volute shown in the illustration?
Answer A
main bus
Answer B
emergency bus
Answer C
standby generator
Answer D
general alarm power
supply
Figure C
Figure D
Figure E
Figure G
Excessively low air pressure occurring in the intercooler
of a reciprocating air compressor is caused by
__________.
If you install a hydraulic hose on a unit and fail to leave
sufficient room for expansion, which of the following
problems will develop?
leaky discharge
valves on the LP
cylinder
The hose may pull
loose from its fittings.
The refrigeration compressor in a water cooled
refrigeration system is short cycling on the high
pressure cutout switch. One reason for this could be the
__________.
In the operation of a flash type evaporator equipped
with air ejectors, the air and non-condensable gases
are evacuated directly from the __________.
system is low on
refrigerant
Illustr
GS-0083
One
Three
first stage flash
chamber
Most pump manufacturers recommend that the suction one size smaller than
piping dimension for centrifugal pumps be __________. the pump suction
nozzle
The usual method of unloading a low pressure air
holding the discharge
compressor at start-up is accomplished by
valve open
__________.
Hydraulic systems typically operated for intermittent
Constant tension
service do not require the use of oil coolers and would mooring winch
include all of the following except _________?
system
leaky discharge
valves on the HP
cylinder
The components
connected by the
hose will be
damaged.
high pressure cutout
switch is improperly
adjusted
insufficient
intercooler cooling
second stage flash
chamber
first stage after
condenser
57
excessive flow
through the line
Cannot be
determined from the
information given
GS-0012
low ambient air
pressure
The hydraulic unit will The hydraulic fluid
will overheat and
fail to acquire any
breakdown.
power.
discharge valves are discharge valves are
leaking slightly
leaking excessively
the same size as the one size larger than
pump suction nozzle the pump suction
nozzle
the use of a
holding the suction
precharged
valve open
accumulator
Hatch cover systems Watertight door
system
In a spring opposed, diaphragm-type, pneumatic power area of the internal
number of spring
unit shown in the illustration, the force exerted on the
plate
coils
spring is equal to the air pressure multiplied by the
__________.
Slipping drive belts on a ship service air compressor is low lube oil viscosity fouled intercoolers
a probable symptom of __________.
If you install a new hydraulic hose in a hydraulic system, failure of the
the hose must be long enough to allow for contraction
hydraulic hose
to prevent __________.
connection
Four
second stage
distilling condenser
installed with a short
radius elbow at the
pump
temporarily
discharging to the air
receiver
Internal combustion
engine hydraulic
starter system
area of the
diaphragm
tension rating of the
spring
a failed unloader
high air receiver
pressure
friction in other areas overheating of the
of the hydraulic
hydraulic fluid
system
GS-0051
Book Num
Ans
11
834
A
11
835
C
11
837
D
11
838
B
11
839
A
11
840
D
11
841
D
11
842
C
11
843
B
11
844
A
11
845
B
11
846
A
Question
The refrigeration system compressor is short cycling on
high head pressure when the sea water cooling
temperature is 72° F. In this situation, you should
__________.
The proper file for a finishing cut on soft metal, such as
brass, is the __________.
Unloading of a low pressure, reciprocating, air
compressor at start-up can be accomplished by
__________.
Answer A
check for sufficient
cooling water flow
through the
condenser
smooth cut file
holding the L.P.
the use of a
discharge valve open precharged
accumulator
using a permanently temporarily
enlarged clearance discharging back to
expansion volume
the compressor
intake
If one of the bilge manifold valves is prevented from
seating, the __________.
bilge-well connected
to that valve, plus the
second bilge-well
being pumped will be
completely emptied
bilge system will lose
vacuum, preventing
other bilges from
being pumped out
aftermost bilge-wells all of the above
connected to that
valve will siphon their
contents to the
forward bilge-wells
The location of a vessel's frame stations may be
obtained from which of the listed drawings?
Which of the following precautions should always be
carried out in dry-dock?
Profile
Base line
Cross section
Liquids should never
be transferred
between tanks
without consulting
the dock master.
If sea valves have
been disassembled,
all bonnets must be
checked for leakage
when the ship is
refloated.
Before refloating, all All of the above.
sea chest strainers
should be verified as
having been
replaced.
Which pump illustrated is fitted with a suction strainer?
Bilge pump
Ballast pump
If an electric motor driven air compressor fails to start, it
may be due to a __________.
Machinery driving fuel oil transfer and fuel oil service
pumps must be fitted with a remote means of stopping
the machinery from __________.
leaking discharge
valve
within the space
concerned
jammed suction
valve
outside the space
concerned
General service
pump
tripped overload
relay
the throttle station
The compressor in an air-cooled condensing
refrigeration system is short cycling on the high
pressure cutout switch. A probable reason for this is the
__________.
The efficiency of a flash type evaporator can be
increased by __________.
system is
overcharged with
refrigerant
system is low on
refrigerant
discharge valves are discharge valves are
leaking excessively leaking slightly
lowering brine
discharge density
Open end wrenches are __________.
nonadjustable solid
wrenches
decreasing the
absolute pressure of
each stage
intended for gripping
round objects
increasing the
saltwater feed heater
temperature
not suitable for
tubing fittings
58
Answer B
purge
noncondensable
gases from the
receiver
warding file
Answer C
reset the
thermostatic
expansion valve
Answer D
completely purge the
high pressure side of
the system
mill file
second cut file
Illustr
Buttock
All of the above
broken discharge
unloader
within the fireroom
increasing the
pressure at the spray
pipe
used with a speeder
handle
GS-0042
Book Num
11
11
11
11
847
848
849
850
Ans
B
D
D
D
11
851
B
11
852
C
11
853
C
11
11
854
855
C
C
11
859
D
11
860
B
11
861
B
Question
An air compressor can be unloaded at start-up by
__________.
Answer A
Answer B
holding the discharge relieving the
valve open
intercooler pressure
to the atmosphere
Answer C
using an enlarged,
permanently opened
clearance expansion
space
Which of the following actions should be taken FIRST if Open the bilge pump Remove each of the Remove only the
a bilge well of a multiple suction bilge system is unable for inspection.
suction manifold
suction manifold
to be pumped out?
valves.
valve to the affected
bilge well.
Answer D
a precharged
accumulator
Attempt to pump out
another bilge well to
determine if the
entire system is
affected.
They are subject to They have a greater They have a greater
less pitting and metal tolerance for high
contact area.
fatigue.
speed applications.
Why do roller bearings have higher loading capacities
than ball bearings?
They are installed
with tighter
clearances.
With regards to fluid flow control, an advantage of
pneumatic control systems over electrical control
systems is __________.
practically no limit to no transmission
the power available losses
for a given system
All of the manifold valves shown in the illustration are
__________.
gate valves
stop-check or stop
valves
The seat of a butterfly valve will most likely be
constructed of __________.
Flexible hose under pressure in a hydraulic system will
__________.
Monel
stellite
low energy input
continued control
through temporary
electrical power
losses
stop valves operated stop-check lift valves
operated from above
from above the
GS-0042
bulkhead deck
the bulkhead deck
a resilient material
admiralty metal
tend to twist about its expand in length and contract in length
long axis
in diameter
and expand in
diameter
The compressor in the ship service refrigeration system discharge valves are discharge valves are condenser is getting
is short cycling on the high pressure cutout switch. The leaking excessively leaking slightly
insufficient cooling
probable reason for this is the __________.
water flow
flex at right angles to
the applied pressure
Which of the following statements describes the
relationship between flash point and ignition
temperature?
Both are higher than The flash point is
normal burning
always higher.
temperatures.
They are not
necessarily related.
In the illustrated steam pressure reducing valve, the
purpose of the item labeled "C" is to __________.
provide sensing of
downstream
pressure to the
control diaphragm
removing the side
plate
equalize pressure
equalize pressure
provide a supply
above and below the above and below the conduit of actuating
power piston
pilot valve
steam for the power
piston
operating the hand
comparing with a
using litmus paste
clutch
hand tape
completely open
completely closed
On tank vessels using an automatic tape wells, free
movement of the tape is normally checked by
__________.
In order for all of the bilge pump discharge to pass
through the oily water separator, shown in the
illustration, the oily water separator bypass valve must
be __________.
Illustr
The ignition
temperature is
always higher.
only cracked open
system is low on
refrigerant
GS-0044
throttled
GS-0042
59
Book Num
Ans
11
862
D
11
863
D
11
864
B
11
11
865
868
C
C
11
869
B
11
870
C
11
871
C
11
872
D
11
873
D
11
874
C
Question
The valve depicted in the illustration shown is a
__________.
Coast Guard Regulations (46 CFR) require remote
controls for stopping fuel oil service pumps. These
controls shall be __________.
If a refrigeration compressor will not start, the reason
may be __________.
The lowest temperature required to cause selfsustained combustion of a substance independent of
any outside source of ignition is called __________.
Answer A
gate valve
Answer B
check valve
Answer C
globe valve
Answer D
butterfly valve
GS-0055
located at the control provided with a
platform
locked cover
the pressure
regulating valve is
not closing
explosive range
accessible to
protected against
authorized personnel accidental operation
only
an excessive lack of badly leaking
worn piston rings
refrigerant in the
discharge valves
system
flash point
ignition temperature combustion
temperature
The aft starboard bilge well is clogged, and back
flushing has not been successful. The next practical
solution would be to __________.
change the trim of
the ship to port in
order to pump out
the bilges for the
remainder of the
voyage
place 20 gallons (
75.7 L) of fuel oil
tank wash into the
affected bilge well to
clear the blockage
properly and safely all of the above
empty the well with a
portable pump then
manually muck it out
According to the illustration, which of the following
statements represents the order of events required to
occur for the device to close?
A vacuum is created
in chamber "III" as
water flows from the
toilet, drawing "C"
into the closed
position.
Once "C" has lifted,
"A" will reseat with
water passing
through "H",
pressure gradually
builds in chamber "I",
developing sufficient
force to reseat "C".
A vacuum is created Releasing "E"
in chamber "III" as a physically draws "C"
result of the high flow down on its seat.
rate of water passing
through this
chamber, drawing
"C" down on its seat.
adjust the tape
weight
lower the thieving rod roll up the tape
On tank vessels using an automatic tape well for
gauging tanks, the hand clutch is used to __________.
Illustr
GS-0155
calibrate the tank
Automatic pressure control valves for steam service
are subjected to high are subjected to a
require periodic maintenance inspections because they compressive stress wide range of
__________.
temperatures and
pressures
continuously throttle
steam which results
in wire drawing and
erosion of the valve
receive high
pressure air from the
pilot valve
Double cut files are most effective when used for
__________.
Which of the listed figures represents the configuration
and alignment of the inlet/outlet head, as viewed from
the tube side?
When a refrigeration compressor motor fails to start, the
FIRST thing that should be checked for is a
__________.
sharpening tools
draw filing
finish work
rough work
A
B
C
D
GS-0122
loose expansion
valve control bulb
60
low differential
setting on the H.P.
cutout
blown fuse in the
motor circuit
faulty suction
pressure regulator
Book Num
11
876
Ans
A
11
877
B
11
878
D
11
879
D
11
880
A
11
881
A
11
882
C
11
883
A
11
885
B
11
886
C
Question
Air compressors are equipped with unloading systems
for the purpose of __________.
Answer A
Answer B
Answer C
Answer D
removing all but the relieving intercoolers providing high
seating valve plates
frictional load during of high temperature starting torque in the during compressor
starting
buildups
drive motor
shutdown
The simplest method to use for determining if a
centrifugal pump is operating as designed, is to
__________.
closely observe the
pump discharge
temperature
The pressure of an operating hydraulic system, as
indicated by a pressure gauge, is a result of the fluid
flow overcoming __________.
As shown in the illustration, a section of pipe with a
3.068 inch internal diameter, has a wall thickness of
.216". When the pipe is bent into a 90° turn, the length
of the outside edge of the curve "A-B" will exceed the
length of the inside edge of the
internal resistance to resistance of the
the load applied to
flow
internal components the system
4.714 inches
close off the
discharge valve, and
watch for a rise in
pressure
5.054 inches
momentarily close off
the suction valve,
and watch for a rise
in pressure
5.161 inches
Illustr
use a clamp on
ammeter and
compare the
readings to past
records
all of the above
5.498 inches
GS-0108
When pressure is applied to the Bourdon tube gage
shown in the illustration, the __________.
gage pointer will
move in a clockwise
direction
Which of the listed pumps, shown in the illustration, can Bilge pump
be used to take suction on the forward, port, engine
room bilge?
Which of the following statements concerning butterfly Special tools are
valves is correct?
required for lapping
or grinding.
sector and pinion will gage tube expands
remain stationary
and grows longer
Ballast pump
General service
pump
connecting link
changes the set point GS-0114
of the pointer
All of the above
GS-0042
It is impossible to
throttle flow with a
butterfly valve.
To close the valve, it
is only necessary to
turn the handle a
quarter of a turn.
C
The butterfly valve
should never be
used in a freshwater
system.
D
Which of the listed illustrations correctly represents the
installation of a hydraulic hose?
As shown in the illustration, the eccentric reducer, used
as a transition piece between a centrifugal pump
suction flange and the suction piping flange, must be
installed with the __________.
A
B
large diameter flange reducer arranged to eccentric portion
connected to the
prevent the
above the pump
pump
accumulation of air in suction centerline
the suction piping
eccentric portion at
right angles to the
pump suction
centerline
The names plug, bottom, and taper refer to
__________.
pipe fittings
drill press parts
61
measuring
instruments
machinist's hand
taps
GS-0063
GS-0089
Book Num
Ans
11
887
B
11
888
B
11
891
B
11
892
A
11
893
B
11
894
C
11
895
B
11
896
A
11
897
D
11
899
C
11
900
A
11
901
C
Question
One of three available centrifugal salt water service
pumps is in operation with a sea water temperature of
50° F. The cooling temperature of all systems supplied
by this pump appear to be high. Therefore, you should
__________.
Answer A
only need to start a
second pump and
operate it in parallel
Answer B
start a second pump
and place it on line,
close the discharge
valve on the original
pump and watch for
a rise in the
discharge pressure
Answer C
after starting the
second pump open
the casing vent valve
of the first pump,
then secure the first
pump
Answer D
after starting the
second pump secure
the first pump and do
nothing else with the
salt water service
system
Pressure in an operating hydraulic system is developed only by the pump as by resistance to the
__________.
its primary function
fluid flow through the
system
On small passenger vessels, separation of machinery
provided between
separated from
and fuel tank spaces shall be __________.
each of these spaces accommodation
by watertight and/or spaces by watertight
vapor tight bulkheads and/or vapor tight
bulkheads
by the thermal input
to the system's fluid
not considered as
essential
solely by the charge
applied by the
accumulators
separated from
accommodations
spaces by noncontinuous
bulkheads
Which of the listed types of files is the best for
producing a fine finish on metal?
Which of the following systems, according to Coast
Guard Regulations (46 CFR) must have an emergency
stop, protected with a glass enclosure, and located
outside of the machinery space?
The accumulation of air and other non-condensable
gases in a refrigeration system will __________.
Mill
Float
Warding
Second cut
Main fire pump
Fuel oil service pump Main circulating/bilge All of the above
injection valve
cause a loss of the
liquid seal
create a vapor lock in collect in the
the liquid receiver
condenser
cause foaming of the
oil in the crankcase
The rudder pintle is identified in the illustration by the
item lettered __________.
An eccentric reducer, used as a transition piece
between a centrifugal pump suction flange and the
suction piping flange, must be installed with the
eccentric portion below the suction pipe centerline to
__________.
Which pump installation would require an external
source of sealing water?
If a block and tackle arrangement were rigged as shown
in figure "C" of the illustration and "W" is 250 lbs, the
amount of force "P" required to hold the load stationary
would be __________.
When the pressure on a compound gage is released,
the gage pointer is returned to zero psig by action of the
__________.
Hand taps are provided in sets of three, with each being
known as __________.
A
B
F
E
Illustr
GS-0101
prevent the formation allow sediment to
of air pockets
settle on the bottom
reduce vapor
slope the suction line
pressure of the water upward at the pump
entering the pump
GS-0089
suction
Main jacket water
cooling pump
83.33 lbs.
Auxiliary fire pump
Salt water service
pump
104.16 lbs.
125.00 lbs.
Centrifugal bilge
pump
250.00 lbs.
GS-0110
Bourdon tube
spring return arm
compound
diaphragm
compensating spring
taper, plug, and
finish
short, medium, and
long
taper, plug, and
bottom
starting, through, and
finishing
62
Book Num
11
902
Ans
B
Question
A lube oil filter can be used to remove most
contaminants from lube oil. A contaminant which will
remain in the lube oil after filtering is __________.
Answer A
acid
Answer B
diesel oil
Answer C
sediment
Answer D
When installing a hydraulic hose, which of the following The hose should not The hose should be There should be
precautions should be taken?
be twisted.
protected with a
some slack in the
sleeve if it is
hose.
subjected to rubbing.
All of the above.
frosting of the liquid
line
A mill file
abnormally cold
reefer boxes
All warding files
11
903
D
11
904
B
11
905
A
Air entering an air-cooled refrigeration system is
indicated by __________.
Which of the following files will produce the finest
surface on a work piece being finished filed in a lathe?
11
906
C
How often should cargo oil pump relief valves on tank
vessels to be tested?
Prior to each cargo At least once each
discharge operation. voyage.
At least once a year. At each biennial
inspection.
In most horizontally split centrifugal pump casings,
wearing rings are prevented from rotating by
__________.
swelling the wearing using wear rings with
rings into the casing a larger than normal
outside diameter and
having the casing
'crush' them in place
using one dowel pin
pressed into the side
of the ring, then
fitting the pin into a
hole drilled into the
side of the casing
ring grove
using an extended lip
formed on one half of
the ring and using
the upper casing half
to trap the lip when
the casing is
reassembled
Pigtails, or siphons, are used to protect Bourdon tubetype gages from the direct exposure to steam by
__________.
Round split dies are usually adjustable to __________.
changing the
direction of the
steam flow
allow threading on
oversized stock
creating a
condensate seal
bleeding off a portion
of the steam
11
907
D
11
910
C
11
911
B
11
912
A
11
914
D
11
915
A
The general service pump is to be used to remove
Four
clean water from the No. 3 port double-bottom
cofferdam and discharge it through the ballast
overboard discharge. What are the minimum number of
valves, shown in the illustration, that must be opened on
both the suction and discharge to accomplish this task?
higher than normal
head pressure
A double cut file
rapidly reducing the
steam velocity
a clear sight glass
Any bastard cut file
control the tightness to help start the die
of the thread fit
squarely on the
round stock
Five
Six
Illustr
water
allow threading up to
a shoulder
Seven
GS-0042
The presence of bubbles in a refrigeration system liquid promote refrigerant
line may __________.
dehydration
be absorbed in the
receiver
cause low
carry moisture and
condensing pressure lead to corrosion
A mill file is used to __________.
produce a coarse
finish by push filing
file lead
produce a very fine
finish by draw filing
63
file plastic
Book Num
11
916
Ans
C
Question
Dirt should not be allowed to contaminate a grease
lubricant because the __________.
Answer A
dirt will cause
corrosion of bearing
The function of a centrifugal pump double volute casing reduce radial thrust
is to __________.
on the impeller
11
917
A
11
919
D
11
920
D
11
921
B
11
922
A cylindrical tank measures 10 feet in diameter and 20 29 long tons
feet in length, weighs 4 long tons when empty. When
completely filled with a petroleum product having an API
gravity of 35.5 at 60° F, what is the total weight of the
tank and its contents in long ton
924
A
11
925
A
11
926
B
11
927
D
11
928
D
Answer C
dirt is very abrasive
when mixed with
grease
reduce hydraulic end
thrust
double the liquid
velocity through the
pump when
compared to a single
volute
33 long tons
37 long tons
Answer D
grease will become
inflammable
provide the effect of
multi-staging
41 long tons
The liquid refrigerant
tends to collect at the
bellows or diaphragm
and reduces the
valve sensitivity.
manometer
all of the above
be rough, weak, and straighten out after
easily broken
the third revolution
The sensing bulb is
empty of liquid
refrigerant charge at
the designed
operating
temperature.
The sensing bulb is
never emptied of
liquid refrigerant
under normal
operating conditions.
Which of the listed statements is a characteristic of the
liquid charged power element used with thermostatic
expansion valves?
At the designed
operating
temperature, the
liquid refrigerant
charge has changed
to a vapor.
Air trapped in a refrigeration system using a watercooled condenser is usually indicated by __________.
unusually high head higher than normal
pressure when
liquid level in the
compared to the
receiver
existing temperature
of the liquid
refrigerant
unusually lower than higher than normal
normal discharge
liquid refrigerant
pressure when
temperature
compared to the
existing temperature
of the liquid
refrigerant
Which of the following types of files will produce a fine
finish when draw filing?
The valve best suited for throttling gas or liquid flow in a
pipeline is the __________.
In order to properly remove air from the casing of a
centrifugal pump when starting, the pump should have a
__________.
A hydraulic flow control circuit is shown in the
illustration, and is known as a __________.
Mill cut
Bastard
Double cut
Second cut
gate valve
globe valve
check valve
plug cock
positive head
negative suction
head
mechanical seal
metered-in circuit
metered-out circuit
bleed-in circuit
vent valve attached
to the casing at the
top of the volute
bleed-off circuit
64
Illustr
GS-0149
Differential pressures can be measured with the use of diaphragm type gage pressure transducer
a __________.
If you are cutting external threads by hand and you start be out of round on
be cut crooked on
the die at an angle, the threads will __________.
the work
the work
D
11
Answer B
bearings will leak oil
excessively
GS-0107
Book Num
Ans
11
929
D
11
930
B
11
931
C
11
932
A
11
933
D
11
934
B
11
935
C
11
937
C
11
939
D
11
940
D
11
941
C
11
942
D
11
944
B
Question
In the refrigeration system illustrated, the liquid line
strainer is located between the __________.
Answer A
solenoid valve and
thermal expansion
valve only
.072 psi
According to the illustrated water filled U-tube draft
gage, what is the converted draft reading in pounds per
square inch?
The tool used in precision work to smooth or enlarge a round out
slightly undersized hole, is called a __________.
Answer B
solenoid valve and
back pressure valve
only
.144 psi
Answer C
condenser and
receiver only
Answer D
Illustr
receiver and solenoid
valve only
RA-0005
.216 psi
.324 psi
GS-0115
round file
reamer
hole driller
Copper sheet metal that is to be used as a gasket, is
usually annealed by heating it to a cherry red color, and
then __________.
Scale accumulation on evaporator heat exchange
surfaces __________.
Excessive circulation of the lubricating oil with the
refrigerant in a refrigeration system will cause
__________.
The first step when resetting the slide valves on a
duplex reciprocating pump is to __________.
dousing it in cold
water
cooling it slowly in air quenching it slowly in drawing its temper
oil
quickly
increases brine
density
carbon deposits on
the compressor
suction valves
position the steam
pistons on 3/4 stroke
increases distillate
salinity
the evaporator
temperature to
increase
ensure the balance
piston is on the down
stroke
reduces metal
corrosion
rapid corrosion of the
thermal expansion
valve
place the steam
pistons in the mid
stroke position
reduces heat transfer
Which of the following centrifugal pump components
converts the liquid kinetic energy of velocity to the
potential energy of pressure?
If the temperature in a hot air manifold were found to be
122° F, what will be the equivalent reading on the
centigrade scale?
The pressure indicated by the U-tube manometer
shown in the illustration is equal to __________.
An American Standard Tapered pipe thread has a taper
of __________.
When replacing a gasket in a six-bolt flanged joint, in
what order should the bolts be tightened?
Impeller
Electric motor
Volute
Eye
35° C
40° C
45° C
50° C
-2 inches of water
+2 inches of water
-4 inches of water
+4 inches of water
1/4 inch per foot
1/2 inch per foot
3/4 inch per foot
1 inch per foot
Each bolt should be
installed and
tightened in
consecutive order in
the clockwise
direction.
Each bolt should be Install and tighten
installed and
bolts 1, 3, 4, 2, 5,
tightened in
and 6, in that order.
consecutive order in
the counterclockwise
direction.
Install and tighten
bolts in pairs which
are opposite each
other in the flange (14, 2-5, and 3-6).
overheating and
oxidation
reducing the cloud or
floc point
Sludge may form in the crankcase of an air conditioning bubbling refrigerant
compressor as a result of __________.
65
lowered operating
temperatures
no operating
problems
measure the present
port openings to
ensure reassembly
will be the same
GS-0115
Book Num
Ans
11
945
A
11
947
B
11
949
A
11
950
A
11
951
B
11
11
953
955
Question
Answer A
Answer B
Which of the following statements is correct concerning It is lower than the
It is the temperature
the 'flash point' of a liquid?
ignition temperature. at which a substance
will spontaneously
ignite.
Answer C
It is the temperature
at which a
substance, when
ignited, will continue
to burn.
Answer D
It is the temperature
at which the released
vapors will fall within
the explosive range.
The primary function of a centrifugal pump volute is to
__________.
If your vessel burns 8 tons of fuel per hour at 15 knots,
how many tons per hour will it burn at 18 knots?
develop a high
velocity liquid
13.82 tons
convert velocity to
pressure
15.61 tons
limit hydraulic end
thrust
16.00 tons
initiate flow
The adapter for the tachometer shown in the illustration
is designed for reading shaft RPM as long as the shaft
is accessible __________.
The complete tool used for manually cutting threads on
pipe is called a pipe __________.
The purpose of the six-way valve used in an electrohydraulic steering system is to __________.
at one end
at any point along its to the impeller
length
to the impulse
transmitter
tool and die
stock and die
tap
chaser
parallel rudder
motion to the
steering wheel
take the pump off
stroke when desired
rudder angle is
attained
redirect hydraulic
fluid flow when
changing over
pumps
ensure positive
contact between the
Rapson slide and the
rudder post
Shown in the illustration is a mechanical shaft seal
providing constant surface contact, regardless of hull
deflections, draft, or sea conditions while underway.
This is ensured by the __________.
drive alignment bolts adapter plate
bellows
inflatable seal
The second stage feed water temperature and shell
absolute pressure in a multistage, flash type, distilling
plant is __________.
higher than the first
stage feedwater
temperature and
absolute shell
pressure
settling in a fuel tank testing in a
burning in a
laboratory centrifuge calorimeter
C
C
956
B
11
957
B
The percentage of impurities in a specific fuel oil
sample is determined by __________.
D
Which of the following statements describes the actions Control over speed,
of an axial piston motor with a full deflection variable
direction, and
position tilting box?
stopping would be
better than having
the pump equipped
with the tilting box.
958
16.37 tons
GS-0117
GS-0135
11
11
Illustr
66
lower than the first
stage feedwater
temperature and
absolute shell
pressure
Maximum speed
when rotated in the
'hauling in' direction
would be obtained
with the tilting box
just prior to neutral
stroke, while 'pay out'
would be the
opposite.
the same as the first
stage feedwater
temperature and
absolute shell
pressure
Maximum torque,
when rotated in the
'pay out' direction
would be obtained
with the tilting box
just prior to neutral
stroke, while 'hauling
in' would be the
opposite.
not related to the
feedwater
temperature and
absolute shell
pressure
testing in a closed
cup
Maximum speed in
either direction of
rotation would be
achieved just beyond
of neutral stroke,
making reversal of
direction difficult.
Book Num
11
959
Ans
A
11
960
C
11
961
C
11
962
B
11
964
C
11
966
C
11
967
B
11
968
B
11
969
C
11
970
B
11
971
B
11
972
A
Question
A ship travels 234.02 nautical miles in 24 hours at an
average propeller speed of 60 RPM. If the propeller
pitch is 20.07 feet, what is the propeller slip during this
passage?
To avoid corrosion and/or oxidation of the element, a
thermometer bulb is often protected by a 'well' or
casing. In addition to protecting the element, the 'well'
will also __________.
Answer A
17.95%
Answer B
20.46%
Answer C
22.10%
cause consistently
higher than actual
readings
cause consistently
lower than actual
readings
require a longer time increase the
for the element to
sensitivity of the
reach thermal
element
equilibrium with the
system being
measured
Taps and dies used for threading pipe are __________. not hardened
not fluted
tapered
Which of the following types of files is generally used for
finishing?
Sludge may be formed in the oil in the crankcase of a
reciprocating air conditioning compressor as a result of
__________.
The temperature of the steam flow to the saltwater feed
heater, in a flash type evaporator can be manipulated
by a/an __________.
Assume identical impeller diameter, width and speed.
Which of the following impellers will produce the
greatest liquid velocity?
A single cut file
Any bastard cut file
A double cut file
refrigerant bubbles in refrigerant reducing
the lube oil
the lube oil viscosity
pressure regulator
within the supply
orifice
A single stage
straight vane impeller
thermally actuated
bypass valve
Answer D
26.20%
straight
Only a double
bastard cut file
oxidation of the lube reducing the floc or
oil from overheating cloud point of the oil
attemporator in the
steam supply piping
sensor wired in with
the three-way salinity
dump valve
A dual impeller with
multiple stepped
curved vanes
A single stage
A dual integral
curved vane impeller impeller unit
operating at 10%
lower speed
The designers of the A comparable pump Reduction gears
equipment have
tilting box if used in a would be required if
never considered the hydraulic motor,
a hydraulic motor
use of the tilting box would eliminate the were designed with a
with a hydraulic
hydraulic lock to the tilting box.
motor.
system when the
motor is placed in
neutral stroke.
A tilting box hydraulic
motor could never
produce more than
one horsepower.
In the circle illustrated, the circumference is 62.8 feet.
What is the area of the shaded portion?
What characteristic can be applied to Refrigerant 134a
when compared to R-12?
27.5 square feet
28.0 square feet
28.5 square feet
29.0 square feet
It is corrosive.
It is visible as a blue It has a distinctive
fog.
taste.
The tool used for cutting external pipe threads is called
a pipe __________.
A reading of 0.625 inch on a micrometer with a 2 to 3
inch range would be equal to __________.
cutter
It is not compatible
with mineral based
lubricants.
stock and die
threader
ratchet cutter
2 5/8 inches
2 7/16 inches
3 1/8 inches
3 9/16 inches
With regards to axial piston hydraulic pump/motor
power units, motor speed is a function of fluid flow rate
generated by the pump. Which of the following
statements describes why the motor is NOT
manipulated as is the pump?
67
Illustr
GS-0134
Book Num
11
974
Ans
A
Question
Foaming of the oil in a refrigeration compressor
crankcase is caused by __________.
To properly make and fit a new gasket to a flange, you
should __________.
11
975
B
11
976
C
11
11
978
981
B
B
11
982
A
11
983
D
11
984
B
11
985
A
11
11
986
987
A
C
In a two stage flash evaporator, heated feed water is
vaporized in the __________.
Dry seal threads, typically used for tubing to pipe
connectors, and threaded piping in hydraulic systems
are __________.
Answer A
Answer B
refrigerant boiling out liquid refrigerant
of solution from the flooding the
lube oil
compressor and
system
place the gasket over remove excess
the flange and knock gasket material by
off the excess
trimming with
material with a lead scissors or tin snips
mallet
first effect tube nest
Answer C
lube oil viscosity
being reduced by
refrigerant dilution
Answer D
compressor suction
pressure suddenly
increasing
make up the flanged
joint to make an
impression of the
flange surfaces to
insure a pattern for
proper alignment
cut grooves into the
flange with a chisel
to ensure good
gasket contact
distiller feedwater
heater
first and second
first and second
stage flash chambers stage vapor
separators
the same as National different than NPT as different than NPT as the same as National
Fine threads
the flanks of the
Pipe threads
the crest of a
matching thread is in matching threads are
in contact with the
contact with the
opposing threads
trough of the
opposing thread
be at least one size be the next size
larger than the pump smaller than the
pump suction
suction connection
connection
precipitating
chemically adjusting
nondecomposed
the sewage pH to 7.0
waste in a collection
tank
Excessive scale formation in a distilling plant may result poor distillate quality reduced evaporator low brine
from __________.
capacity
concentration
In a refrigeration system, foaming of the crankcase oil
expansion valve to
compressor to knock water regulating
may cause the __________.
overfeed
valve to fail
If a continuous and steady flow of lube oil is provided,
1 psig
5 psig
10 psig
which of the listed pressures represents the lowest
supply pressure at which a small high-speed bearing
can be safely lubricated?
The final heating of the feed water in a flash type
low pressure steam heat exchange in the vaporization in the
distilling plant is carried out by __________.
admitted to the
first-stage feedbox
first-stage flash
feedwater heater
chamber
When installing a new rotary pump, the suction piping
should __________.
be of the same
diameter as the
pump suction
connection
In sewage treatment, the term 'maceration' refers to the breaking up solid
process of __________.
matter into fine
particles
The centrifugal pump component responsible for
converting the mechanical energy of the liquid being
pumped, to that of kinetic energy is the __________.
electric motor
68
volute
impeller
be sloped to the
pump
eliminating bacterium
coli from the sewage
improper vacuum
regulation
crankcase drains to
plug
15 psig
heat exchange in
each stage distiller
condenser
diffusion nozzle
Illustr
Book Num
11
988
Ans
D
11
989
D
11
990
D
11
992
C
11
993
B
11
994
A
11
995
B
11
996
D
11
11
997
999
B
B
Question
Answer A
Answer B
In which of the listed hydraulic system components
High pressure pump Low pressure pump
could an O-ring seal be satisfactorily used in providing a shaft casing
shaft casing
seal?
As shown in the illustration, a section of 4.5 inch
5.498 inches
6.511 inches
internal diameter standard weight, seamless steel pipe,
has a wall thickness of .355". When the pipe is bent into
a 90° turn, the length of the outside edge of the curve
"A-B" will exceed the length of the inside edge of the
curve "C-D" by __________.
An example of an anti-friction bearing is a __________. rubber cutlass strut
bearing
The device shown in the illustration which is used for
A and B
removing moisture from the liquid refrigerant in the
system, is located between points __________.
takes the pump off
stroke when the
desired rudder angle
is attained
Excessive oil foaming in the crankcase of a refrigeration overheated
excess lube oil
compressor can result in __________.
compressor bearings viscosity
A metal scribe commonly found on a Combination
Square measuring tool should only be used to
__________.
In a two-stage flash evaporator, the sea water feed
temperature is increased as it passes through the
__________.
The basic function of the centrifugal pump impeller is to
__________.
1000
C
11
1001
D
11
1002
C
Answer D
Relief valve spool
7.069 inches
8.184 inches
GS-0108
Kingsbury thrust
bearing
C and D
wax crystals forming
in the lubricant
mark on metal
first-stage distilling
condenser
second-stage
distilling condenser
salt water feed
heater
directly increase the directly increase the
pressure of the liquid velocity of the liquid
being pumped
being pumped
3.5 inches
clean file teeth
all of the above
convert the potential separate air from the
energy of the liquid liquid being pumped
to kinetic energy
4.5 inches
5.5 inches
The variable being
measured is drawn
on rectangular
coordinates.
Strip charts are more
difficult to read than
circular charts.
0.0025 inch
0.010 inch
0.025 inch
not fluted
tapered
straight
The time graduations The data charts are
fan out from the
more easily stored
center.
than the circular
charts.
69
D and E
returns the rudder to
midposition when the
wheel is released
remove packing
One complete turn of a micrometer screw will move the 0.001 inch
spindle __________.
Pipe thread taps are __________.
not hardened
ball bearing
synchronizes wheel
position with the
rudder position
carbon deposits on
the compressor
piston rings
punch gasket holes
It is desired to operate an air compressor with a 12 inch 2.5 inches
flywheel at a speed of 510 rpm. If the motor runs at
1750 rpm, what size motor pulley should be used?
Illustr
RA-0012
The follow-up gear on an electro-hydraulic steering gear relieves excessive
__________.
fluid pressure
Which of the listed characteristics is typical of a strip
chart graphic recorder?
11
line shaft or spring
bearing
B and C
Answer C
Linear actuator
without nylon insert
Book Num
11
1003
Ans
Question
Answer A
A roughened checkered surface is machined by a lathe knurling tool
on round stock using a __________.
Which of the following statements is correct concerning The liquid receiver
a typical shipboard multi-coil refrigeration system?
functions to collect
and remove
noncondensable
gases.
Answer B
checkering tool
Answer C
chamfering tool
Answer D
threading tool
A thermostatic
expansion valve is
used to control
refrigerated space
temperature.
Refrigerant
temperature in an
evaporator is directly
related to refrigerant
pressure.
Dehydrators must be
used continuously in
a refrigeration
system.
motor overload will
open
relief valve will open pump will overheat
motor will overheat
Drift punch
Aligning punch
Center punch
Prick punch
slow down
run cooler
D
One of the consequences in continuing to operate a
centrifugal bilge pump with the discharge valve closed,
is that the __________.
Which of the listed punches can be properly used to
free a tapered pin 'frozen' in its hole?
If a centrifugal pump is being driven by a steam turbine
and the discharge valve is closed off, the pump will
__________.
speed up by 5% until no longer continue to
the discharge valve internally convert the
resultant energy
is reopened
imparted to the pump
A
The device illustrated is considered to be a pump.
Which of the following statements is true if it is to be
used as a hydraulic motor?
Pressurized fluid
would have to be
supplied to the
existing indicted
casing outlet.
1/4 HP
Roller vanes would The diameter of the
have to be
rotor would have to
exchanged for sliding be increased.
vanes.
Nothing could be
done to convert this
device to a hydraulic GS-0074
motor.
1/2 HP
3/4 HP
1.0 HP
Which of the listed types of bearings is an example of a
half bearing?
When using a one inch micrometer, a reading of .875 is
equal to __________.
The process of grinding or shredding sewage into
smaller particles is known as __________.
If an operating bilge pump is developing good vacuum,
but is unable to discharge any water, which of the
following problems is the most probable cause?
Piston pin bushing
Thrust bearing
Spring bearing
All of the above.
1/2 inch
5/8 inch
7/8 inch
15/16 inch
detention
comminution
bulking
skimming
The wearing rings
The suction strainer
are excessively worn. is clogged.
The discharge valve The shaft is worn.
is clogged.
Which of the additives listed will maintain the
suspension of fine residue particles in lube oil?
A centrifugal pump produces flow with a resulting
discharge head by energy conversion. It is typical for
the energy conversion to follow the order of
__________.
Floc point
Dispersant
A
11
1004
C
11
1005
C
11
1006
A
11
11
1007
1008
11
1009
B
11
1010
C
11
1011
C
11
1012
B
11
1015
B
11
1016
C
11
1017
A
The mechanical efficiency of a particular centrifugal
bilge pump is 92.5%. What is the smallest horsepower
motor that can effectively operate this pump at a
capacity of 100 gpm with a discharge head of 15 feet?
Suppressant
All of the above.
mechanical energy to mechanical energy to potential energy to
kinetic energy to
kinetic energy to
potential energy to
mechanical energy to mechanical energy to
potential energy
kinetic energy
kinetic energy
potential energy
70
Illustr
Book Num
Ans
11
1019
C
11
1020
C
11
1021
C
11
1022
D
11
1023
B
Question
Upon a vessel's departure from point "A" at 1206, the
counter reading was 616729. At midnight, the counter
reading was 672889, at which time the engine speed
was increased to 82 RPM, and remained the same
speed until its arrival at point "B" at 1140 the following
day. If the vessel is equipped with a 20' 8" diameter
propellor, having a pitch of 20', and apparent negative
slip of 6.65% was calculated for the passage, what
observed distance was covered?
Answer A
353.2 miles
Answer B
364.8 miles
The size of ball and roller bearings can be identified by
the __________.
The terms rough, coarse, bastard, second cut, smooth,
and dead smooth refer to the __________.
rolling member size
inner race cone width manufacturer's
numerical code
shape of the file
distance between the
parallel cuts on the
file
delivering liquids
operating for longer
over greater
periods of time
distances
any numbered line
odd numbered lines
on the dial
only
parts of the file
An advantage of a helical gear pump over a simple gear maintaining a
pump is that the helical gear pump is capable of
steadier speed
__________.
To properly cut an odd numbered thread with a lathe
any line on the dial
using the thread dial indicator illustrated, you should
close the lathe split, or half-nut on __________.
Answer C
398.4 miles
Answer D
413.9 miles
outer ring width
size of the file
producing a
smoother discharge
flow
even numbered lines
only
Refrigerant is normally sub cooled in a refrigeration or
air conditioning system condenser to __________.
maintain adequate
coil back pressure
prevent flashing in
the liquid line
reduce refrigerant
reduce compressor
volume in the system discharge line
loading
0.2340 inch
0.2520 inch
11
1024
B
1025
D
What is the reading of the vernier micrometer caliper
scale shown in figure "G" in the illustration?
0.2280 inch
11
1026
B
The terms rough, coarse, bastard, second cut, smooth,
and dead smooth refer to the __________.
shape of the file
11
coarseness of the file size of the file
teeth
A pump is defined as a device that __________.
produces pressure
imparts energy to a creates a vacuum to is to develop a
pressure differential
fluid to move it from move a liquid in all
point "A" to point "B" installations
11
11
1027
1029
GS-0084
0.2470 inch
GS-0083
B
C
Illustr
A vessel departed from point "A" at 1206 with a counter 1.04%
reading of 616729 and arrived at point "B" with a
counter reading of 731929 at 1148 the following day.
This vessel is equipped with a 20 foot 8 inch diameter
propeller, with a pitch of 20 feet. The o
1.29%
71
-6.65%
cuts of the file
-11.04%
Book Num
Ans
11
1030
A
11
1031
D
11
1032
A
11
1033
A
11
1034
A
11
1035
A
11
1036
B
11
1039
A
11
1040
C
11
1041
A
11
1042
B
11
1043
C
11
1044
C
Question
Answer A
Restrictions occurring in the small orifices of pneumatic moisture in the
control system components can be caused by
compressed air
__________.
supply
Answer B
Answer C
excessive dryness in pressure surging in
the compressed air the compressed air
supply
receiver
Answer D
insufficient
lubrication of the
system components
The best tool to use when attempting to widen the
gasket cutter
opening of a flanged joint, in preparation for renewing
the gasket, is a __________.
A file handle is fitted to the file's __________.
tang
To properly cut even numbered threads using the lathe any line on the dial
thread dial indicator shown in the illustration, you should
close the lathe split or half-nut on __________.
spud wrench
flange spreader
scraper
point
taper
even numbered lines odd numbered lines
only
only
heel
any unnumbered half
line
allow the refrigerant
to enter the throttling
device in a saturated
condition
increase the
refrigerating effect by
increasing the
amount of flash gas
minimize the
temperature drop of
the liquid as it
passes through the
solenoid valve to the
outlet side
If a bilge pump is able to develop vacuum, but is unable the circuit breaker
to sufficiently pump out the bilges, you would check for
all of the following EXCEPT __________.
for leaks in the
suction piping
relief valve is not
properly seated
the suction strainer
Item "E" as shown in the illustration is known as a
__________.
While starting a hydraulic anchor windlass, you observe
that hydraulic pressure does not develop in spite of the
proper operation of the electric drive motor. Which of
the following actions should you take FIRST to restore
pressure?
A primary element used with flow measurement devices
highly suitable for liquids containing solids in
suspension, is a __________.
To safely remove the piston rod packing from the steam
end of a reciprocating pump, you should __________.
rudder stock
rudder post
rudder gudgeon
pintle
Make certain that the
hydraulic reservoir is
filled to the proper
level.
Inspect the disc
brake on the electric
motor for proper
operation.
Check the electric
motor for an open
overload relay
contact.
Check for full voltage
supply to the electric
motor.
concentric orifice
convergent nozzle
venturi tube
pilot tube
use a packing hook
open the throttle
valve and 'blow' the
old packing out
do nothing, as this
type of pump utilizes
O-rings in lieu of
packing
has crosscut teeth
condensing
temperature
The principal purpose of subcooling liquid refrigerant
prior to its entering the expansion valve is to
__________.
increase the
refrigerating effect by
decreasing the
amount of flash gas
The tang of a file is the part that __________.
does the cutting
When a lathe is used for thread cutting, the number of
threads per inch produced is determined by the speed
relationship between the __________.
drive motor and
spindle
open the steam
chest and pry the
packing loose with a
scraper
fits into the handle
is opposite the
handle
spindle and feed rod lead screw and head lead screw and feed
stock spindle
rod
Subcooling is a method of reducing the temperature of
the liquid refrigerant below its __________.
freezing point
floc point
72
compression
temperature
Illustr
GS-0084
GS-0101
Book Num
Ans
11
1045
B
11
1046
D
11
1047
C
11
1048
D
11
1049
A
11
1050
B
11
1051
Question
The valve which is most suited for regulating the flow
through a pipeline is a __________.
The reading on the micrometer scale shown in figure
"D" in the illustration is __________.
A centrifugal pump must have a stuffing box liquid
sealing line and seal cages installed if the pump
__________.
Answer A
gate valve
Answer B
globe valve
Answer C
swing-check valve
Answer D
plug-cock valve
0.4710 inch
0.4715 inch
0.4810 inch
0.4815 inch
suction head is high,
and is handling a
cool, debris free
liquid
parallel, pump unit
is handling a liquid
suction lift exceeds
with a temperature of 10 inches Hg
less than 150° F
vacuum
discharge is less
than 25 psi
The illustrated hydraulic pump graphic symbol is used
to depict a __________.
A standard grade of 3 inch steel pipe has an outside
3.5 inches
diameter of 3.5 inches and an inside diameter of 3.068
inches. What is the nominal size of steel pipe having an
outside diameter of 4.0 inches and an inside diameter
of 3.548 inches?
two-stage, pump unit duplex, pump unit
combined, pump unit
3.75 inches
3 inch nominal size
pipe of schedule 80
thickness
3 inch nominal size
pipe of schedule 160
thickness
Which of the screwdrivers listed is produced with a tip
to fit screws with a four way or cross slot?
In order to prevent overheating of the packing in the
stern tube stuffing box, __________.
Standard
Phillips
Allen
Torx
cooling water is
supplied from the
fresh water cooling
system
the gland nuts must
be tightly taken up to
prevent any water
leakage
Many micrometers are equipped with a ratchet stop at
the end of the thimble to __________.
click at each
increment of
measure
A follower rest should be used with a lathe to machine
__________.
large diameter stock threads on long
between centers
slender shafts
A
11
1052
B
11
1053
B
11
1054
B
11
1055
C
11
1056
A
11
1057
B
11
1058
C
the gland is properly stave-type rubber
adjusted to permit a seals are used
slight leakage of sea
water
In the illustrated refrigeration system, component "G" is expansion valve
the __________.
Which of the drill sets listed would commonly be
A set of numbered
referred to as a 'Jobbers Set'?
size drills from 1 to
60.
If the chemical analysis of a lube oil sample taken from acidity has increased
the main propulsion machinery indicates an increased
neutralization number the __________.
The proper design of a centrifugal pump must include a takes suction from a
seal cage and sealing line when the pump __________. low temperature
pressurized tank
The illustrated hydraulic pump graphic symbol is used
series-flow pump unit
to depict a/an __________.
73
Illustr
GS-0081
GS-0098
prevent the user from stop the spindle from eliminate ratchet
movement
closing the tool with sliding out of the
barrel
too much force
compressor
work mounted on the round stock to a
lathe carriage
finished dimension
filter drier
A set of lettered size A set of fractional
drills from A to Z.
size drills from 1/16''
to 1/2''.
viscosity has
demulsibility has
decreased
improved
condenser
RA-0012
A set of fractional
size drills from 1/2''
to 2''.
tendency to foam is
guaranteed to occur
takes suction from a is handling a liquid at has a high positive
hot well
less than 150° F
suction head
two-stage pump unit double pump unit
combined pump unit
GS-0097
Book Num
11
1059
Ans
C
11
1061
B
11
1062
C
11
1063
B
11
1064
C
11
1065
A
11
1066
A
11
11
11
11
1067
1069
1070
1071
Question
Answer A
As shown in the illustration, a section of standard
1.050 inches
weight, seamless steel pipe, has an external diameter
of 3.5 inches. When the pipe is bent into a 90° turn, the
length of the outside edge of the curve "A-B" will exceed
the length of the inside edge o
Answer B
2.670 inches
Some vessels are equipped with a water lubricated
stern tube. When at sea, operating under normal
conditions, the water service valve from the ship's
saltwater system to the bearing should be __________.
closed, and no
leakage permitted
across the shaft
packing
closed, and only
slight leakage
permitted across the
shaft packing
open, and no
leakage permitted
across the shaft
packing
The correct torque value for a micrometer torque
wrench is reached when __________.
the scale is read on
the handle
the dial is read on
the handle
To commence cutting threads with a metal lathe, you
should engage the __________.
Heat is removed from the cooling system, shown in the
illustration, by component __________.
When using a micrometer to measure a drill for size,
you should measure across the drill __________.
feed-change lever
split or half-nut
an audible click is
a dial lights on the
heard and the handle handle
releases
back gear lever
thread-chasing dial
5
3
H
E
margins
flutes
shank
web
A good quality lubricating oil used in any machinery,
should be __________.
Centrifugal pumps are designed with sealing lines
__________.
acid free
capable of
emulsifying
in place of
mechanical seals
a rapid oxidizer
additive free
in place of slinger
rings
to prevent air from
entering the pump
casing along the
shaft
An 8" diameter wheel is driving a 20" diameter wheel
via a pair of belts. The power input is supplied by a 5
HP motor rotating the driving wheel at 300 RPM. If the
efficiency of the transmission is 80%, what RPM and
torque is delivered to the driven wheel?
120 RPM at 4 HP
160 RPM at 4 HP
220 RPM at 4.5 HP
220 RPM at 4.8 HP
piston uncovering a
port whose opening
is directly
proportional to fluid
flow
A reciprocating
plunger directly
applying force to a
fluid.
movable orifice plate rotating vane
venturi tube and high transmitting nutating
pressure tap
motion to a counter
mechanism
D
A
A
C
to prevent the fluid
being pumped from
pouring out of the
stuffing box when a
high suction head is
available
A rotameter, when used to indicate the rate of fluid flow movable float riding
in distilling plants, is essentially an area meter
on a rod centered in
consisting of a __________.
a tapered tube
Which of the following methods applies to how a
vacuum is created by a jet pump or an eductor?
Centrifugal force
converted into
potential energy.
74
Answer C
5.498 inches
Answer D
6.912 inches
Illustr
GS-0108
A rapidly moving
stream of fluid
passing through a
nozzle.
open, and only slight
leakage permitted
across the shaft
packing
A propeller drawing a
fluid through a
Venturi nozzle.
RA-0012
Book Num
Ans
11
1072
B
11
1073
B
11
1074
D
11
1075
B
11
11
1077
1078
Question
For greater accuracy, some micrometers have a vernier
scale making it possible to read in increments of
__________.
The 60° taper angle machined on work supported by
lathe centers is most easily machined by the
__________.
Under normal conditions, the refrigerant enters the
compressor in an operating refrigeration system as a
__________.
The most accurate method of measuring the setting of
an inside caliper is to use a/an __________.
Answer A
Answer B
five thousands of an ten thousands of an
inch
inch
Answer C
Answer D
twenty five
one fortieth of an
thousands of an inch inch
taper attachment
compound rest
tailstock set-over
method
headstock set-over
method
liquid
dry saturated gas
wet saturated gas
superheated vapor
thread micrometer
outside micrometer
engineer's scale
dial indicator
Sealing lines provide sealing liquid flow to the stuffing
box of a centrifugal pump __________.
to help lubricate the
shaft packing
to limit the outflow of in place of sealing
gages
seawater from the
stuffing box of a
pump provided with a
high suction head
A
D
11
1080
D
11
1081
C
11
1082
A
11
1083
D
11
1084
C
11
1085
C
11
1086
B
in place of
mechanical seals
stem packing should all of the above
be renewed if the
packing has
hardened
As routine maintenance, the bilge manifold valves are
disks and seats
periodically removed and examined. Prior to resecuring should be checked
the valve bonnets, the valve __________.
and lapped if
necessary
bonnet flange
gaskets should be
renewed if they were
cut or torn
A hydrometer measures specific gravity by comparing
the __________.
density of a
substance in water
with the density of
the same subject in
air
differences in volume mass of substance
between water and measured with the
the liquid measured density of the same
substance
buoyancy of an
indicator in water
with the buoyancy of
the same indicator in
the liquid being
measured
An excessive amount of water is prevented from
entering a vessel using a water lubricated stern tube
bearing by the use of the __________.
A micrometer screw has a pitch of __________.
propeller hub
lignum vitae
shaft packing
labyrinth seal
40 threads per inch
50 threads per inch
75 threads per inch
100 threads per inch
setting over the
tailstock
high pressure liquid
using the compound using the taper
rest
attachment
low pressure vapor high pressure vapor
low pressure liquid
.001 inch
.010 inch
.100 inch
microseconds
round stock diameter electrical resistance
A taper may be turned on a lathe by __________.
Refrigerant enters the condenser as a __________.
If the thimble of a micrometer were turned through one
complete revolution, the micrometer would open or
close by a linear distance of __________.
A micrometer would be used to measure __________.
75
.025 inch
all of the above
low voltages
Illustr
Book Num
Ans
11
1087
B
11
1089
B
11
1090
C
11
1091
B
11
1092
D
11
1093
D
11
1094
D
11
1096
B
11
11
11
11
1097
1098
1099
1100
D
C
A
A
Question
Answer A
Early models of the flash-type evaporators used a
distilling condenser
separate shell-and-tube heat exchanger as the air
ejector condenser. More recent models use a combined
air ejector condenser with the __________.
Answer B
salt water feed
heater
Answer C
distillate cooler
Answer D
flash chamber
If the pump for a hydraulic anchor windlass is
overheating, the cause may be __________.
excessive pump
discharge pressure
too low of a tilting
box angle
insufficient drive
motor speed
Coast Guard Regulations (46 CFR), require that an
forced draft blower
indicating light, located at the propulsion control station, motor
be illuminated if there is an overload that would cause
overheating of the __________.
fuel pump motor
steering gear motor
condensate pump
motor
When a vessel is underway, a small amount of water is flush out silt and mud
allowed to leak through the water lubricated stern tube which can
stuffing box in order to __________.
accumulate from
shallow water
The rotating part of a micrometer is the known as the
anvil
__________.
To safely change spindle speeds on a lathe, you must disengage the
first __________.
spindle clutch
At point "D", shown in the illustration, the refrigerant is a low pressure gas
__________.
A small hole gauge is used in conjunction with a/an
feeler gauge
__________.
The function of seal cages, or lantern rings installed in cool the shaft
the centrifugal pump stuffing boxes, is to __________.
prevent overheating
of the packing
prevent seizing of the
ensure positive
coolant flow through rubber strips in the
the strut bearings
bearing bushing
sleeve
frame
thimble
engage the feed
change lever
low pressure liquid
disengage the feed
reverse lever
high pressure gas
stop the lathe
rotation
high pressure liquid
micrometer
surface gauge
angle gauge
excessive drive
motor speed
Apply an adhesive
between parts "D"
and "E".
Apply an adhesive to Apply an adhesive
part "G".
between part "F" and
the shaft.
The capacity of a particular ballast pump is 200 gallons 1.5 hours
per minute. Approximately how long will it take to ballast
a tank with 68.5 long tons of seawater?
2.0 hours
2.5 hours
3.0 hours
16 seconds for
ordered rudder
position changes of 5
degrees
10 seconds for
ordered rudder
position changes of
2.5 degrees
all of the above
30 seconds for
ordered rudder
position changes of
70 degrees
76
RA-0012
lubricate the packing seal air from entering distribute the sealing
along the shaft
liquid within the
stuffing box
The device shown in the illustration has displayed a
Apply an adhesive
continuing tendency to leak, despite using extreme care between the shaft
in its installation during numerous repair efforts. Which and part "D".
of the following conditions might be used to prevent the
pump shaft leakage from reoccurring with this device?
Coast Guard Regulations (46 CFR) require an audible
and visible alarm to be actuated in the pilothouse when
the actual position of the rudder differs from the position
ordered by the follow-up control system by 5 degrees°
or more for more than __________.
Illustr
GS-0071
Book Num
Ans
11
1101
B
Question
An oil fog lubrication system is recommended for
__________.
1102
C
Which of the devices shown in the illustration is
designed for both inside and outside measurements?
A
11
1104
A
11
1106
A
In the illustrated refrigeration system, refrigerant exists
in its liquid form when it is between components
__________.
Which of the projections represents the left side view of
the object "X" in the illustration?
In a six month period, the illustrated device has needed
to be replaced twice due to excessive grinding of part
"E". Which of the listed aids might assist in reducing
this problem?
The collision bulkhead is located __________.
H and K
11
11
1108
D
11
1109
D
11
1110
A
11
1111
D
11
1112
D
11
1113
A
11
1114
C
11
1115
A
According to Title 46 CFR, of the equipment listed
below, which equipment must be tested NOT more than
12 hours prior to getting underway from a U.S. port
when the voyage is to be of 48 hours or greater
duration?
In a flash distilling unit, evaporator feed (seawater) first
absorbs heat in the __________.
Which of the listed numeric values represents the
smallest size drill?
Which of the lathe operations listed is best done with
the carriage locked in position?
Heat is removed from the refrigerant, as shown in the
illustration, in the labeled part __________.
If you turn the adjusting screw clockwise of a springloaded, internal pilot, pressure reducing valve, you will
__________.
The function of lubricating oil is to __________.
11
1116
A
Answer A
gear shaft bearings
Answer B
high speed ball
bearings
Answer C
low and moderate
speed ball bearings
Answer D
heavily loaded pinion
gear bearings
B
C
D
Illustr
GS-0073
L and F
G and D
D and L
RA-0012
A
B
C
D
GS-0022
Use a softer material Increase the contact Increase the contact Increase the
for part "D".
surface area of part surface area of part thickness of the
GS-0071
"F".
"E".
cover gasket at point
"H".
at the stern of the
as the first watertight
on the bridge deck
between the
passenger and cargo ship
bulkhead aft of the
areas
bow in the ship
All of the above
All external vessel
control
communications and
alarms
Steering gear
Shaft generator
vapor feed heater
air ejector condenser saltwater heater
distillate cooler
#0
#1
#60
#80
Facing work held in a Turning work held
chuck.
between centers.
L
K
Threading internal
threads.
H
Boring an angled
hole.
G
compress the
adjusting spring
against the
diaphragm
reduce friction
between contact
surfaces in motion
release spring
tension from the
diaphragm
increase steam
pressure to the
reducing valve
decrease spring
tension in the main
valve
provide even
distribution of
bearing wear
reduce the
accumulation of
harmful detergents
maintain a constant
oil temperature
output at each
bearing
77
RA-0012
Book Num
11
1117
A
Question
Answer A
Answer B
While at sea, the flash type evaporator is discharging
continue the current dump the evaporator
the output to the distill tanks. If it becomes necessary to evaporator operation to the bilge
reduce the feed water temperature below 165° F, you
should __________.
1118
C
Which of the labeled parts would be considered as the
'dynamic seal ring' portion of the illustrated device?
A
11
If hot oil comes in contact with a diesel engine
turbocharger, catches fire, and causes in excess of
$25,000 (US dollars) damage to your ship, by law this
must be reported to the __________.
Coast Guard Regulations (46 CFR), make certain
requirements regarding over current protection.
Steering gear feeder circuits shall be protected only by
__________.
Carbon deposits forming on the discharge valves of an
air compressor are caused by oil deterioration under
high pressure. The first step in reducing these deposits
would be to __________.
When a flash evaporator is being operated in extremely
cold water, you may need to throttle the seawater
supply to __________.
engine manufacturer American Bureau of
Shipping
11
11
11
1119
1120
1121
Ans
C
A
A
11
1122
B
11
1123
C
11
1124
B
11
1125
C
11
1126
B
11
1128
D
11
1129
B
B
Answer C
secure the
evaporator until the
feedwater
temperature can be
raised to 165° F or
more
Answer D
raise the tripping
point at the salinity
indicating panel for
the three-way valve
E
G
Illustr
GS-0071
a circuit breaker with motor running over
instantaneous trip
current protection
USCG Officer in
vessel underwriters
Charge, Marine
Inspection at the next
port
a nonrenewable link a renewable link
cartridge fuse
cartridge fuse
reduce the discharge increase the
temperatures with
compression ratio
intercoolers
use a high viscosity
oil
increase the oil
volatility
prevent cold
shocking the
evaporator
maintain the
feedwater
temperature above
the required
minimum input
temperature
avoid flooding the
evaporator shell
increase the
evaporator distilling
rate
The dead center of a lathe can be properly used only
after the end of the work piece has been __________.
counter bored
tapered
center drilled
convexed
Flash gas formed in the liquid line of a refrigeration
system may cause __________.
pressure at
expansion valve pins expansion valve
expansion valve inlet and seats to erode
capacity to increase
to increase
pressure difference
across the expansion
valve to increase
Which of the drill sizes listed represents the largest size
drill?
Which of the illustrations depicts the correct procedure
for applying pipe dope?
The device shown in the illustration is commonly known
as a/an __________.
Overheating of the hydraulic fluid in an electro-hydraulic
anchor windlass can result from a/an __________.
A
X
Z
XX
A
B
C
D
quad seal
soft-packing seal
spring seal
mechanical seal
overload on the
pump motor
low fluid level in the
reservoir
low fluid viscosity
high oil level in the
around the shaft seal sump
78
GS-0046
GS-0071
Book Num
Ans
11
1130
C
11
1131
B
11
11
1132
1134
B
B
11
1135
B
11
1136
B
11
1137
D
11
1138
C
11
1139
B
Question
Answer A
According to Coast Guard Regulations (46 CFR), which Hydraulic structural
of the following statements is correct regarding the
rudder stops are
steering apparatus requirements for a vessel over 250 mandatory.
feet in length?
Answer B
On hydraulic type
steering gears, a
suitable arrangement
of check valves in
the main piping
system may be
considered as a
means of steadying
the rudder.
Answer C
Answer D
A separate auxiliary All of the above.
means of steering is
not required where
the main gear is of
the dual power
hydraulic type,
having two
independent pumps
and connections.
A dirty intercooler on the ship service air compressor
will result in __________.
higher than normal
power consumption
unloader malfunction water in the
lubricating oil
decreased
compression ratio
Illustr
Which of the listed conditions will cause the feed water, Gravity siphon effect Higher vacuum in the Difference in brine
Lower pressure in
that has not flashed to vapor in the first-stage of a flash
second-stage
density between first first-stage
evaporator, to flow into the second-stage?
and second stages
the portion of liquid
refrigerant which
does not flash
exposure to the high exposure to the high
ambient temperature ambient temperature
of the cooled space
within the coil
In a refrigeration system, the heat normally producing
the flash gas at the thermostatic expansion valve, is
obtained from __________.
the hot gas bypass
connection at the
three-way valve
Sealing lines provide sealing liquid flow to the stuffing
box of a centrifugal pump __________.
to prevent seawater to cool the shaft
from passing out the
stuffing box when a
high suction head is
present
in place of
mechanical seals
in place of lantern
rings
A twist drill gage can be used to measure the drill's
__________.
Under normal operating conditions, the highest
temperature and pressure conditions existing for flashtype evaporators will occur in the __________.
length
diameter
clearance angle
web thickness
first stage
second stage
brine pump
discharge
salt water feed
heater
An axial piston hydraulic motor is caused to rotate by
fluid flow from a comparably designed variable
displacement pump fitted with the illustrated device. If
the motor stalls, due to excess load, the pump tilting
box will seek neutral stroke until the h
A 30 HP electric motor is rotating shaft "A" at 300 rpm.
What is the horsepower and rpm at shaft "B", if the
efficiency of the spur gears is 67%?
A
E
I
J
GS-0040
20 H.P. at 200 RPM
20 H.P. at 900 RPM
30 H.P. at 100 RPM
30 H.P. at 900 RPM
GS-0136
79
Book Num
Ans
11
1140
D
Question
Electric and electro-hydraulic steering gear motors are
required by Coast Guard Regulations (46 CFR) to be
__________.
11
1141
B
A dirty intercooler on an air compressor will cause
__________.
11
1142
A
11
1143
C
11
1144
C
11
1145
C
11
1146
B
11
1148
A
11
1150
A
11
1151
D
11
1152
D
Answer A
protected by a circuit
breaker set at 125%
and a thermal
overload device
damage to the
unloader operating
diaphragm
Which of the following actions should be taken if during Correct the cause of
a routine maintenance inspection of a centrifugal pump, the scoring and
localized scoring on a pump shaft sleeve is detected?
repair the sleeve or
replace with a new
one.
Which of the metals listed below can be cut with the
Cast iron
highest operating lathe speed?
High vapor superheat in a refrigeration system, may be increased capacity of
caused by a/an __________.
the compressor
Answer B
provided with a
running motor over
current protection
device
Answer C
served by a single
two conductor cable
an increase in
current flow to the
motor
Reassemble the unit
and provide more
water leak off for
proper lubrication.
high pressure in the
receiver
Mild steel
Aluminum
Soft brass
decreased capacity
of the compressor
loss of receiver
capacity
more efficient
operation of the
thermal expansion
valve
In a two-stage flash-type evaporator, excess brine in the directly to the second directly overboard
first stage automatically passes __________.
stage feed heater
through the brine
cooler
The size of a drill is usually marked on the __________. point
shank
Answer D
served by two feeder
circuits
an excessive
consumption of
crankcase oil
Check for parallel
Reassemble the unit
alignment of the
and adjust the
sleeve radial faces to governor to obtain a
the sleeve bores.
slower speed.
into the second stage into the second stage
flash chamber
vapor condenser
taper
flute
As high side
pressure increases
part "A", "B", and "C"
will work together to
reestablish the
original tilting box
angle.
The increase in high
side pressure will
gradually increase
the tilting box angle
of the variable
displacement pump.
Coast Guard Regulations (46 CFR) require that electric served by two
provided with a motor protected by a circuit
and electro-hydraulic steering gear motors shall be
electric power feeder running over current breaker and a
__________.
circuits
protection device
thermal overload
device
Excessive lube oil consumption by a reciprocating air
increasing the
using oil having an
intercooler or
compressor can be caused by __________.
operating pressure
excessive viscosity aftercooler leaks
differential
The total length of stroke in a reciprocating steam pump increasing or
variations in the
twisting the stay rod
can be adjusted by __________.
decreasing the
throttle adjustment
in a clockwise
number of packing
direction
rings around the
piston rod
served by a single
two conductor cable
A variable displacement pump is fitted with the
illustrated device, the discharge flow rate will be
reduced as described by which of the following
statements?
Part "H" will move to
block the
replenishing pump oil
flow across part "G"
as flow across
hydraulic motor
decreases.
80
When part "D"
rotates
counterclockwise,
part "E" will rotate
clockwise allowing
part "G" to slide
towards the set point
spring 'F.'
Illustr
carrying the oil level
higher than normal
changing the setting
of the tappet collars
on the pilot valve
operating rod
GS-0040
Book Num
11
1153
B
Question
Answer A
Which of the following statements best defines 'depth of The distance to tool
cut' in lathe work?
point advances with
each revolution of
the work.
1154
B
In which of the listed refrigeration system components
does superheating of the refrigerant take place?
Expansion valve
11
A
With regards to the diaphragm controlled, internally
piloted, steam pressure reducing valve illustrated, as
the __________.
outlet pressure
outlet pressure
diaphragm ruptures, adjusting spring is
drops, the valve stem drops, the valve stem the valve will close
compressed further,
will move down
will move up
outlet pressure will
decrease
The vacuum maintained in the salt water feed heater
shell of a flash-type evaporator is generally
accomplished by __________.
a separate air ejector a direct unimpeded
unit
connection between
second stage and
salt water feed
heater
by an external line
from the first stage
via a fixed orifice
the fixed orifice
provided in the
steam supply line
In the device illustrated, if part "D" rotates clockwise
then part "E" will rotate __________.
counterclockwise
clockwise and act
and act upon part "H" upon part "H"
clockwise and act
upon part "G"
none of the above
11
1156
Ans
11
1157
C
11
1158
C
11
1159
D
11
1160
B
11
1161
C
11
1162
C
11
1163
C
11
1164
D
11
1166
C
Answer B
The distance from
the bottom of the cut
to the uncut surface
of the work piece.
Answer C
Answer D
The distance the
The chip length that
work piece
will be removed from
circumference moves the work in 1 minute.
past the cutting tool
point in 1 minute.
Evaporator
Drier
Receiver
Sounding tubes and access openings for fuel oil tanks Washrooms
on cargo vessels are permitted by Coast Guard
Regulations (46 CFR) to be located in which of the
listed spaces?
An electric driven steering gear power unit is required
7 knots
by Coast Guard Regulations (46 CFR) to be capable of
putting the rudder over from 15° on one side to 15° on
the other side in not more than 60 seconds under
emergency power with the vessel running ah
Laundries
counterclockwise
and act upon part
"G"
crew lounge
10 knots
15 knots
20 knots
Excessive lube oil consumption in a reciprocating air
compressor is an indication of __________.
Which of the lubricants listed is the best to use on a
reciprocating pump rod?
When stock is being turned down on a lathe, the
outside diameter is reduced by an amount equal to
__________.
In a refrigeration system, the amount of refrigerant
admitted to the evaporator is directly related to
__________.
If the drill point lips are of unequal length, the drill will
wobble and __________.
leakage in the
intercooler
Oil mixed with
kerosene.
one half the depth of
cut
worn or broken
piston rings
Graphite and oil.
defects in the high
pressure unloader
Vegetable oil.
condenser cooling
water temperature
the solenoid valve
differential pressure
leakage in the
aftercooler
Engine oil.
the depth of cut
the compressor
discharge pressure
cut a continuous chip jam in the hole and
break
81
Illustr
twice the depth of cut twice the rate of feed
the superheat of the
refrigerant in the tail
coil
cut an oversized hole overheat rapidly from
rubbing
GS-0054
GS-0040
Book Num
Ans
11
1173
B
11
1174
A
11
11
11
11
11
1175
1176
1177
1178
1179
B
Question
If you are cutting off a piece of stock in a lathe and the
work piece tends to climb over the top of the cutoff tool,
you should __________.
The refrigerant gas returning to the compressor should
be __________.
The distillate produced by a flash evaporator has a
salinity of 0.21 grains per gallon, with a feed water
temperature entering the first-stage of the evaporator at
170° F. Under these conditions the three-way solenoid
valve will __________.
On a multistage flash-type evaporator, the flash
chamber is __________.
Answer A
increase the lathe
spindle speed
combined as part of
the salt water feed
heater
the open area above combined as part of
the brine levels in the the distillate cooler
first and second
stages
The heated feed water entering any flash chamber of a
flash-type evaporator will __________.
vaporize, with the
unflashed water
remaining at the
temperature at which
it entered the flash
chamber
vaporize, with the
unflashed water
equalizing to the
saturation conditions
existing in the flash
chamber
vaporize, with the
remaining water at a
temperature greater
than it entered the
flash chamber
boil, allowing steam
bubbles to rise
through the brine at
the bottom of the
flash chamber
If the device shown in the illustration is used to control
the output of a variable displacement pump, and part
"A" is displaced 50% from 'zero' stroke, which of the
following statements will be correct?
Pump discharge will
be 100% until the
effects of lost motion
in the associated
linkages is
eliminated.
Once the pump
achieved a
corresponding output
of 50%, the pump
would automatically
return to neutral
stroke.
The pump would
develop a 50%
discharge rate and
remain at that
condition until the
control handle
position is changed.
The system
unloading valve will
open to guarantee a
pump discharge of
no more than 50%.
Coast Guard Regulations (46 CFR) require tank
globe valve
sounding tubes terminating above the weather deck of a
cargo vessel to be fitted with a __________.
stop-check valve
gate valve
screw cap or plug
According to Coast Guard Regulations (46 CFR Part
6 knots
58), a power driven auxiliary steering gear for a vessel
capable of a 12 knot service speed, must be able to
meet the rudder movement requirements at which of the
minimum vessel speeds listed below?
7 knots
9 knots
12 knots
If the electric motor driving an air compressor fails to
start, the cause may be a __________.
tripped circuit
breaker
control line leak
defective pop valve
B
B
C
D
11
1180
B
11
1181
B
superheated
Answer B
increase the height
of the tool cutting
edge
saturated
Answer C
stop the lathe and
tighten the chuck
dense
Answer D
stop the lathe and
lubricate the dead
center
flooded
Illustr
direct distillate to the direct distillate to the recirculate distillate recirculate distillate
bilge
freshwater tanks
to the first-stage feed to the distiller
inlet
saltwater heater
leaking unloader
82
another term used to
describe the vapor
feed heater
GS-0039
Book Num
Ans
11
1182
C
11
1183
B
11
1184
A
11
1185
C
11
1186
B
11
1187
B
11
1188
B
11
1190
A
11
1191
B
11
1192
C
11
1193
A
11
1194
D
Question
Answer A
Answer B
If you determine that a steam reciprocating pump is
completely open the install a smaller nut
operating with too long of a stroke, causing the piston
steam cushioning
on the piston rod
nut to strike the cylinder head, you should __________. valves
Answer C
Answer D
adjust the valve gear install a shorter
piston rod
to manufacturer's
specified
measurements
When steel, cast iron, or other metals with surface
scale are being turned, the first roughing cut should be
taken __________.
The low pressure side of a refrigeration system is
considered to exist from the __________.
In the event of a power failure to the salinity panel on a
flash-type evaporator, the three-way solenoid valve will
__________.
Positive displacement, helical gear pumps are well
suited for pumping oil because __________.
slowly to prevent tool deep enough to get
chatter
under the scale
lightly to avoid dulling rapidly in a
the tool
continuous chip
expansion valve to
the compressor
be frozen in its last
position
receiver to the
expansion coil
direct distillate to the
fresh water tank
expansion valve to
the evaporator
dump distillate to the
bilge
stuffing boxes
eliminate the leakage
problems usually
associated with other
gear pumps
helical gear pumps
are essentially selfpriming and produce
high suction lift
closely maintained
helical gear pumps
design clearances in are designed with
this pump is not
extreme tooth angles
necessary
Scale formation in a flash-type evaporator is usually
found in the __________.
If the device shown in the illustration is being used to
control the output of an axial piston pump, when part
"A" is moved to the right, then part "B" __________.
flash chamber walls
tubes of the salt
water feed heater
will move to the right, will move to the left,
and "C" will move to and "C" will move to
the left, but lagging the right, but will lag
behind the
behind "B"
movement of "A"
tubes of the air
ejector condenser
will move to the right,
as will "C"
Coast Guard Regulations (46 CFR) require hydraulic
steering gear systems to be equipped with a means of
steadying the rudder in an emergency. This may be
accomplished with __________.
a suitable
arrangement of stop
valves in the main
piping
a positive
arrangement for
stopping the rudder
before the rudder
stops are reached
a suitable
arrangement of block
and tackle powered
by winches
buffer arrangements
to relieve the gear
from shocks to the
rudder
diesel oil
gasoline
naphtha
flush all dirt and grit
from the bearing
staves
take a shallow cut
keep the gland
packing cool
keep the stern tube
fair water cool
slip in the tool post
take a deeper cut in
the work
After disassembly, the safest way to remove carbon
ammonia
deposits from air compressor inlet and discharge valves
is to use __________.
In a water cooled stern tube, a slight leakage of water
flush all dirt and grit
across the packing gland is provided to __________.
from the gland
If the distances "A" and/or "B" as shown in the
illustration are excessively increased, the tool will
__________.
The component of a refrigerating system in which the
refrigerant vaporizes and absorbs heat is known as the
__________.
chatter
condenser
83
vapor generator
Illustr
condenser to the
expansion valve
dump distillate to the
makeup feed tank
tubes of the distiller
condenser
will move to the left,
as will "C"
GS-0039
accumulator
evaporator
GS-0085
Book Num
11
11
1195
1196
Ans
D
1197
B
11
1199
B
11
1201
B
11
1202
C
11
1203
C
11
1205
B
1207
Answer B
Saltwater heater
discharge
Answer C
First-stage internal
feed box
Answer D
Second-stage
internal feed box
Item "F" shown in the illustration represents two
hydraulic pumps that are __________.
motor operated with
one pump located in
the engine room at
the shaft alley door
and the other in a
common passage
way
manually operated
with one pump
located at the shaft
alley door and the
other in a common
passage way
manually operated
with one located in
the engine room and
the other in the shaft
GS-0103
alley of the water
tight door
D
11
11
Question
Answer A
In which of the areas listed would you expect to find the Distiller air ejector
highest salt concentration in a flash evaporator?
cooling medium
D
11
1209
D
11
1210
A
motor operated with
one pump located on
the engine room side
and the other on the
shaft alley side of the
water tight door
The flash chamber of a solo shell evaporator is typically combined as part of
the salt water feed
an external chamber used for the combining of the
distillate produced at two different absolute pressures. heater
On a multistage flash-type evaporator, the flash
chamber is __________.
the open area above combined as part of
the brine levels in the the distillate cooler
first and second
stages
another term used to
describe the vapor
feed heater
self-closing gate
valve
Coast Guard regulations (46 CFR) require the upper
ends of sounding tubes, terminating at the weather
deck, to be closed by a __________.
The main bearings of a reciprocating air compressor
are tapered roller bearings. When mounted, these
bearings are given a 'cold' end clearance to
__________.
quick-closing valve
screwed cap
allow for crank web
deflection
allow for longitudinal prevent longitudinal
thrust in the
expansion of the
crankshaft as the unit crankshaft
warms up
reduce torsional
vibration in the
crankshaft
Generally speaking, when using a twist drill to bore a
hole in metal, the harder the metal, the greater should
be the drill's __________.
To operate a centrifugal fire pump at reduced capacity,
you should __________.
Steam supply for the operation of the low pressure
evaporators may be obtained directly from the
__________.
The brine level in the second-stage of a flash-type
evaporator is determined in part by the feed rate, the
rate of evaporation in both stages, and the
__________.
Coast Guard Regulations (46 CFR) require that tank
sounding pipes terminating below the freeboard deck of
a cargo vessel must be fitted with a __________.
diameter
lip clearance
cutting speed
readjust the relief
valve
main steam line
throttle the suction
throttle the discharge open the priming line
line
valve
turbine extraction line turbo-generator
air ejector exhaust
steam supply line
line
steam flow rate to
the air ejectors
float controlled level
of the feed heater
capacity of the
distillate pump
throughput of the
brine overboard
pump
globe valve
stop-check valve
check valve
gate valve
Any restriction in the instrument air piping of a
pneumatic control system will __________.
delay transmission of increase the
reduce the
accelerate
the air signal
transmitted air signal transmitted air signal transmission of the
intensity
value
air signal
84
globe valve
included point angle
Illustr
Book Num
Ans
11
1211
B
11
1212
A
11
1213
B
11
1214
B
11
1215
B
11
1216
B
11
1218
B
11
1219
B
11
1220
A
11
1221
B
11
1223
A
11
1224
D
Question
Answer A
If one drive belt on an air compressor is found to be
replace that belt only
worn you should __________.
The discharge rate or capacity of a centrifugal pump will change in the
vary directly as the __________.
impeller diameter
Answer B
replace all of the
belts
square of the
impeller radius
If you are machining work held between lathe centers, lubricate the centers
and the lathe centers begin to squeal, you should first
__________.
The term 'oil foaming' in refrigeration practice, is used to release of dissolved
describe the __________.
lubricant from the
refrigerant in the
crankcase
stop the lathe
release of miscible
refrigerant from the
lubricant in the
crankcase
sudden evaporation sudden evaporation
of entrapped air from of entrapped
the refrigerant liquid moisture from the
crankcase lubricant
Where auxiliary steam supply is not used in the process air operated air
of maintaining vacuum in a distilling unit, the vacuum is ejectors
usually attained by __________.
eductor pumps
When operating with a negative suction head, which of
the following types of pumps will require priming?
Reciprocating
Centrifugal
increasing the rate of a separate suction
condensation in the connection to the
distiller condensers brine overboard
pump
Rotary
Gear
Which of the listed pressure-control valves is used in a
hydraulic system to prevent the stray movements of a
vertical load until required?
A saltwater leak shorts out your switchboard causing a
fire which does $(USA)27,500 damage to the electrical
equipment. This must be reported to the __________.
Pressure reducing
valve
Counterbalance
valve
Unloading valve
Sequence valve
insurance
underwriter
U.S. Coast Guard
harbormaster
port engineer
A Bourdon tube pressure gage is protected from the
effects of the steam entering the pressure element by
a/an __________.
exposed, uninsulated impulse-type steam
coil in the line
trap in the gage line
leading to the gage
leather or neoprene
diaphragm in the
gage line
spring loaded
bellows in the gage
line
If the drive belts on an air compressor were squealing,
you should fix them by __________.
One method of accurately checking the alignment of
lathe centers is by moving a dial indicator, securely
mounted on compound rest, between the two positions
indicated on the test bar. If the dial indicator reading on
the tailstock end of the test bar shows a higher(+)
reading than the dial indicator reading at the headstock
end, you should move the tailstock __________.
spraying oil on the
belts
away from you to
correct alignment
loosening the belts
installing wider belts
The refrigerant leaves the evaporator of a refrigeration
system as a low pressure __________.
subcooled liquid
85
tightening the belts
Answer C
dress the worn belt
Answer D
adjust belt tension
cube of the impeller
diameter
impeller efficiency for
large changes in its
size
change the cutting bit run the lathe at a
slower speed
toward you to correct closer to the
away from the
alignment
headstock to reduce headstock to
offset
decrease
misalignment
high temperature
liquid
Illustr
oil saturated liquid
superheated vapor
GS-0141
Book Num
Ans
11
1225
A
11
1226
A
11
1227
D
11
1229
C
11
1230
C
11
1231
C
11
1232
C
11
1233
A
11
1234
D
11
1235
A
11
1236
C
Question
The purpose of a three-way, solenoid, dump valve on
an evaporator is to __________.
Answer A
prevent excessively
saline distillate from
entering the
freshwater system
Reduced capacity, accompanied by vibration and noise
at the suction of a centrifugal pump is a result of
__________.
The size of the loop seal orifice for a flash-type
evaporator is important for maintaining the control of
__________.
cavitation
Answer B
Answer C
Answer D
drain the evaporator drain the evaporator allow the
first-effect only
second-effect only
evaporator's firstand second-effects
to be drained with
one valve
water hammer
fluid friction
steam knock
the vacuum
the absolute
differential developed pressure differential
between both stages developed between
both stages
the absolute
pressure developed
in the salt water feed
heater shell
maintaining distillate
flow between the first
and second stage in
order to avoid dry
seal operation of the
loop
9/16 inches
5/8 inches
35/64 inches
Compound gage
Bourdon tube
Manometer
Deadweight gage
Heat exchanger
Variable
displacement pump
Filter
All of the above
the lowest
During operating periods of a multi-box refrigeration
system using a capacity controlled compressor, when
all of the boxes are actively being cooled, the
compressor lube oil pressure at point "P-1" should be
__________.
A work piece has been mounted between centers and a away from you to
test cut machined at each end to check alignment of the correct alignment
lathe centers. If the test cut on the tailstock end is
deeper than the test cut on the headstock end, the
tailstock must be moved __________.
at its mid-range
the highest
The low pressure side of the refrigeration system,
shown in the illustration, is located between
components __________.
A solenoid-operated distillate three-way valve is
installed in the discharge line between the distilling
plant and the potable water tanks. This valve will trip
and dump the distillate discharge if the __________.
G and J
D and K
If a centrifugal bilge pump were continually operated
with the discharge valve closed the __________.
motor overload would relief valve would
open
open
A measurement of .625 inches is equal to __________. 15/32 inches
In order to accurately measure very low positive
pressures, which of the instruments listed should be
used?
Which of the following components listed is shown in
the illustration?
Illustr
GS-0041
of no consequence
as the lube oil is not
used in the operation RA-0013
of the unloader
toward you to correct closer to the
away from the
alignment
headstock to reduce headstock to
the amount of offset decrease the
misalignment
D and 1
6 and G
RA-0012
distillate salinity is
excessive
86
distillate temperature potable water tank
is excessive
has been filled with
raw water
potable water tank
has become
contaminated
pump would overheat motor would
overheat
Book Num
11
1238
Ans
D
Question
Which of the listed pressure control valves would be
used to establish the maximum operating pressure of a
hydraulic system?
Coast Guard Regulations (46 CFR) define several
acceptable means of closure for ballast and fuel oil tank
vents. One of the acceptable means is by the use of
a/an __________.
The device shown in the illustration is an example of a
simple __________.
Before disconnecting a joint in a pipeline, you should
__________.
Answer A
Pressure-reducing
valve
Answer B
Unloading valve
Answer C
Counterbalance
valve
manually operated
ball check valve
automatically
operated hinged
closure
permanently installed corrosion resistant
canvas hood
wire screen
centrifuge the oil
add makeup oil
renew the entire oil
supply
faceplate
steady rest
draw-in collet chuck
operate the
machinery at
reduced power
compound rest
capacity of 100%
efficiency of 0%
internal slippage of
0%
shut off horsepower
rating of 100%
allow vacuum to be
drawn from the first
stage shell to the
second stage shell
allow vacuum to be
drawn from the
second stage shell to
the first stage shell
aid in maintaining the
difference in absolute
pressure between
the second stage
shell and the salt
water feed heater
11
1239
B
11
1240
B
11
1241
D
11
1242
C
11
1243
B
11
1246
B
The neutralization number of lube oil used in the
machinery has exceeded its permissible range,
therefore, it will be necessary to __________.
For proper support when turning a long thin piece of
work between lathe centers, you should use a
__________.
A centrifugal pump operating against a closed
discharge valve has a/an __________.
A
While in operation, the function of the orifice in the flash maintain the absolute
evaporator loop seal is to __________.
pressure difference
between the first and
second stages
11
1247
11
1249
C
11
1250
B
11
1251
A
11
1253
B
11
1254
A
Bourdon tube gauge U-tube manometer
bridge gauge
Answer D
Pressure-relief valve
hydrometer
Illustr
GS-0115
determine the size of hang a bucket under have a first aid kit on be sure no pressure
the gasket
the joint
hand
exists in the line
A water line ruptures under pressure and floods the
engine room causing $(USA)30,000 damage to the
machinery. By law, this must be reported to the
__________.
Which of the gage types listed is shown in the
illustration?
Joints in pipelines must be properly aligned before they
are connected because __________.
engine manufacturer owner or his agent
U.S. Coast Guard
insurance
underwriter
Duplex Bourdon tube
type
excessive strain on
the joints will result if
they are misaligned
Simplex Bourdon
tube type
misalignment permits
excessive expansion
Duplex compound
GS-0114
type
condensate
accumulates rapidly
when flanges are not
properly aligned
The lathe steady rest is normally used for supporting
one end of a __________.
short heavy casting
held in a three jaw
chuck
at the compressor
discharge
long work piece for
facing, drilling, and
boring
at the compressor
suction
Duplex differential
pressure type
the pipe will be
completely blocked
by even the slightest
amount of
misalignment
short work piece
being machined to
an internal taper
in the expansion
valve
In a typical refrigeration system, the temperature of the
refrigerant gas is the highest __________.
87
tubular work piece
being parted
between centers
in the receiver
Book Num
Ans
11
1255
D
11
1256
A
11
1257
B
11
1259
A
11
1260
C
11
1261
A
11
1262
D
11
1263
C
11
1264
C
11
1265
D
11
1266
A
11
1267
B
Question
Condensate formed within the tubes of the first-effect
submerged tube nest of a double-effect, low pressure
evaporator, is removed by a __________.
Answer A
series of baffles
Answer B
crossover pipe
Answer C
condensate
separator
Answer D
drain pump
A centrifugal pump attempting to develop flow against a capacity of 0%
closed discharge valve has a/an __________.
efficiency of 100%
internal slippage of
0%
shut off horsepower
rating of 100%
The function of the loop seal, as typically provided on a aid in establishing a
flash type evaporator, is to __________.
vacuum in the first
stage via the second
stage
A fuel oil settler is 35 feet 4 inches long, 25 feet 10
2,408.69 bbls
inches wide, and 19 feet deep. The noon sounding
showed a level of 15 feet 2 inches. The oil meter reads
6517 at that time and 8911 at 1600. How many barrels
of fuel oil remained in the settler a
transfer the distillate
produced in the first
stage to the second
stage
3,031.88 bbls
aid in establishing a
vacuum in the
second stage via the
first stage
3,235.79 bbls
aid in developing a
vacuum in the shell
of the salt water feed
heater
3,763.12 bbls
A compound gage is used to measure __________.
temperature and
pressure
Before making up a flanged joint, you should
be certain that the
__________.
flanges line up
squarely
Coast Guard Regulations (46 CFR Part 56) require that 450° F
screw joints shall not be used in piping systems where
severe erosion, crevice corrosion, shock, or vibration is
expected to occur, nor at temperatures over
__________.
If you are taking a roughing cut on a steel work piece in decrease the flow of
a lathe and see blue chips coming off that work piece,
lubricating oil to the
you should __________.
tool
Which of the listed components is considered to
The condenser and
separate the high pressure side of a refrigeration cycle the expansion valve
from the low pressure side of the cycle?
Fluctuations in the pressure and temperature of the
increased heat levels
steam supplied to the first-effect of a low pressure
throughout the entire
distilling plant will cause __________.
unit
humidity and
temperature
cut grooves in the
flange face with a
chisel
650° F
pressure and
vacuum
heat the pipeline to
expand the bolt holes
pressure and
humidity
have a second spare
gasket on hand
825° F
925° F
reduce the cutting
tool height above
center
The king valve and
the solenoid valve
reduce the tool feed
or depth of cut
decrease the cross
compound speed
decreased priming
and lower distillate
salinity
first effect scale
formation to be
lessened
If a centrifugal pump operating with a positive suction
head becomes air bound, your FIRST response should
be to __________.
If 'wet' steam is supplied to the air ejectors of a low
pressure evaporator, the passage of the mixture
through the nozzles will __________.
vent the casing
close the discharge
tighten the packing
improve overall
vacuum
cause the potential
level of kinetic
energy to be partially
converted to thermal
energy
cause the existing
level of thermal
energy to be totally
converted to kinetic
energy
88
The compressor and The condenser and
the expansion valve the solenoid valve
pressure and
temperature
fluctuations in the
entire unit
reprime the pump
cause the level of
thermal energy to be
converted to
potential energy
Illustr
Book Num
Ans
Question
When assembling a run of liquid service piping, which
of the following factors should be considered?
Answer A
How the type of
fittings used will
affect the flow.
Answer B
What type of gasket
material should be
used.
Answer C
What radius should
be used for each
bend in the run.
Answer D
All of the above.
all of the above
Compressor
Illustr
11
1271
D
1273
D
When knurling a piece of work on a lathe, it is important operate the lathe at
to __________.
the slowest speed
use plenty of oil
11
Condenser
11
1274
D
Which of the listed refrigeration system components
keeps the refrigerant circulating through the system?
mount the knurling
tool securely in the
tool post
Evaporator
top of the volute
bottom of the casing
1276
C
If a horizontal centrifugal pump becomes air bound, the suction line
pump should be vented at the __________.
discharge flange
11
Item "E" shown in the illustration is used in the hydraulic one of two motor
circuit as __________.
driven remotely
operated pumps to
open and close the
water tight door
the manually
operated pump
located in a common
passage way to
close the water tight
door in an
emergency
motor driven pump
used to close the
water tight door from
the navigation bridge
in an emergency
the manually
operated pump used
to open or close the
water tight door from GS-0103
the engine room side
Which of the valves listed is NOT considered to be a
hydraulic system directional control valve?
A fuel oil settler is 35 feet 4 inches (10.7696 m) long, 25
feet 10 inches ( 7.8740 m) wide, and 19 feet (5.7912 m)
deep. The noon sounding indicated a level of 15 feet 2
inches (4.6228 m). The fuel oil meter read 6517 (24669)
at that time and 8911 (33732) at 1600. How many
barrels / cubic meters of fuel oil remained in the settler
at 1600?
Unloading valve
Three-position valve Two-position valve
101,164.79 bbls
(16083.87 cubic
meters)
3,031.99 bbls
(482.05 cubic
meters)
2,408.69 bbls
(382.95 cubic
meters)
vacuum
temperature
density
preheat distillate
circulating to the
second-effect tube
nest
dirt will accumulate
inside the bearings
cool the incoming
condense all the
first-effect evaporator distillate in the
feed
second-effect tube
nest
excess lubrication
the bearing will
will result in slippage overheat
11
1277
B
11
1278
B
11
1279
D
11
1280
B
11
1281
A
11
1282
D
11
1284
A
Expansion valve
Spring-centered
valve
127,338.99 bbls
(20245.24 cubic
meters)
A compound Bourdon tube gage is capable of
humidity
measuring pressure and __________.
One function of the vapor feed heater in a double-effect condense part of the
submerged tube distilling unit is to __________.
vapor given off in the
first-effect
Antifriction bearings should not be excessively
lubricated because __________.
the bearings will
require immediate
flushing
Excessive oil foaming in the crankcase of a refrigeration compressor damage refrigerant absorption increased viscosity in carbon deposit on
compressor at start up can cause __________.
from improper
by the lubricant
the lubricant
the compressor
lubrication
suction valves
89
Book Num
Ans
11
1287
D
11
1288
A
Question
For optimum non-condensable gas removal from a low
pressure evaporator, the air ejector suction is usually
taken directly from __________.
Answer A
the salt water feed
heater shell
Answer B
Answer C
anywhere on the
the shell of the first
second stage shell of stage distilling
the evaporator
condenser
Which of the valves listed is NOT considered to be a
Sequencing valve
hydraulic system directional control valve?
An air tank rusts out, explodes, and causes in excess of owner or his agent
$(USA)24,000 damage to the engine room. By law, this
accident must be reported to the __________.
Two-position valve
insurance
underwriter
Answer D
the shell of the
second stage
distilling condenser
Three-position valve Spring-centered
valve
air tank underwriter U.S. Coast Guard
11
1289
D
11
1290
A
A compound gage is typically installed on the
__________.
suction side of a
bilge pump
exhaust manifold of
an auxiliary diesel
discharge line from
an air compressor
chemical feed tank of
an evaporator
B
First Effect vapor
feed heater
Second Effect
distilling condenser
Flash chamber
1291
From where does the air ejector take its suction on a
Soloshell double effect distilling unit?
Vapor separator
11
11
1293
B
chuck
lathe dog
spindle
G and H
H and K
K and L
11
1294
A
11
1295
C
11
1296
C
11
1297
D
Work that cannot readily be mounted between lathe
crotch center
centers is usually held in a __________.
The refrigeration system shown in the illustration uses G and K
which of the components listed to separate the 'high'
side from the 'low' side?
In a double-effect distilling unit, the brine in the second- auxiliary steam
effect is additionally heated by __________.
When securing a distillate pump on a low pressure
fresh water evaporator, which of the listed steps should
be carried out FIRST?
A vacuum is initially established in the first and second
stages of a low pressure evaporator by the use of
__________.
RA-0012
air ejector steam
distillate/vapor from
the first effect
Stop the pump.
Close the pressure
gage valves.
Trip the three-way
Close the sealing line
solenoid dump valve. valves to the pump.
vacuum drag from
the auxiliary
condensate system
individual vacuum
pumps
a single noncondensing air
ejector
a two stage air
ejector
227 psi
231 psi
250 psi
11
1299
A
11
1300
C
11
1302
A
The disc of a relief valve has an area of 0.85 square
208 psi
inches when seated, lifts at a set point pressure of 250
psi. When the valve lifts, the area of the disc exposed to
pressure increases by 20%. At what pressure does the
valve reseat?
The gage most commonly used aboard ship to measure volatile liquid-type
high pressures is the __________.
The delivery rate of an axial piston hydraulic pump is
tilting box
controlled by varying the position of the __________.
11
1303
D
For boring holes in mild steel and general work, the
correct included angle of a drill point is __________.
29°
90
Illustr
flash chamber leak
off
diaphragm actuated- Bourdon tube-type
type
slide block
pintle
resistancetemperature-type
reaction ring
45°
118°
90°
Book Num
11
1305
Ans
D
11
1307
C
11
1309
A
11
1310
C
11
1312
A
11
1313
C
11
1314
B
11
1315
A
11
1320
A
11
1321
C
11
1323
A
11
1324
A
11
1325
B
Question
The vapor separators installed in some distilling plants
consist of several rows of vertical hooked vanes which
remove entrained moisture from the vapor by
__________.
Steam passing through the control orifice installed in
the live steam supply to a low pressure evaporator will
develop significant superheat as a result of
__________.
Coast Guard Regulations (46 CFR) specifically prohibit
seats or disks in pressure vessel relief valves to be
made of __________.
The type of gage most commonly used to measure
pressure is the __________.
In the illustration, control over the direction and quantity
of fluid flow is attained by __________.
Answer A
directing the vapor
through a fine
metallic mesh
Answer B
Answer C
condensing water
trapping water
droplets on the metal droplets in the
vanes
metallic mesh
Answer D
abruptly changing
the direction of vapor
flow
attemporating
conditioning
ebullient conditioning adiabatic
conditioning
effervescent
conditioning
cast iron
bronze
brass
stainless steel
bimetallic type
diaphragm type
bourdon tube type
Illustr
resistancetemperature type
moving the cylinder varying the direction varying the prime
changing the
eccentricity between block off center from of rotation and speed mover direction of
rotation and throttling GS-0059
the reaction ring and the reaction (floating) of the prime mover
pump output
ring
the cylinder block
A depth of cut of 0.26 inch reduces the diameter on a
0.13 inch
0.26 inch
work piece in a lathe by __________.
If condensation collects and drips off an evaporator coil, a maximum of 21° F above 32° F, but
the temperature of the coil is __________.
below the dew point
0.52 inch
In which of the listed types of evaporators is brine
density control most important?
A dial indicator is used to measure __________.
Flash type low
pressure
positive readings
only
Multiple effect flash
type
scribed layout lines
on vertical surfaces
Why is a self-sealing pump generally not satisfactory for Hot brine tends to
service as a brine overboard pump?
form scale on the
impeller peripheral
edge.
Brine density at
1.5/32 cannot by
maintained.
Hot concentrated
Hot brine tends to
brine tends to clog
clog the brine pump
the sealing lines and suction line strainer.
gland seal rings.
Two separate work pieces are to have a taper cut with
the same taper per inch, using the offset tailstock
method. After the first piece is completed, the tailstock
offset must be changed if there is a change in the
__________.
Refrigerant is circulated through a refrigeration system
by the __________.
For efficient and proper operation, the brine density in a
submerged tube evaporator should be maintained at
__________.
length of the work
piece
diameter of the work angle of the cutting
piece
tool
none of the above
compressor
condenser
expansion valve
evaporator
3.5 pounds of salt
per 32 pounds of
water
1.5 pounds of salt
per 32 pounds of
water
1 pound of salt per
32 pounds of water
to prevent excessive
heat loss
1 pound of salt per
32 pounds of water
to minimize
excessive scale
formation
Soloshell low
pressure
shaft eccentricity
91
0.63 inch
21° F but, above the below 32° F and
dew point
below the dew point
Basket type
evaporator
torque of a shaft
Book Num
Ans
11
1327
B
11
1330
C
11
1331
A
Question
Answer A
Regarding the low pressure evaporator steam control
desuperheated
orifice in the live steam supply line, the steam at the
steam
outlet of the orifice if not properly conditioned will be
developed as __________.
A pyrometer is generally used to measure __________. grains of moisture
per cubic foot of air
Answer B
superheated steam
salinity concentration stack temperature
of condensate
level of a fluid in a
tank
200 gpm
300 gpm
500 gpm
both pressure and
pressure alone will
temperature will rise rise
temperature alone
will rise
only a change of
state will occur
is dead centered on
the tailstock spindle
must be removed by
clamping in the
chuck
heat load in the
refrigerator
compartment
Radial piston
fits into the dead
center of the work
piece
solenoid valve in the
liquid line
11
1332
A
11
1333
B
The distillate pump for a 12,000 GPD evaporator,
should be rated at a minimum of __________.
A stopper is inserted into the spout of a closed
container in which water has been heated to a
temperature of 212° F. If additional thermal energy is
imparted, what changes will occur to the pressure and
temperature inside the container?
A tailstock 'dead center' has been given that name
because it __________.
8.3 gpm
11
1334
A
The temperature of the refrigerant in the evaporator coil refrigerant pressure
depends mostly upon the __________.
in the evaporator
11
1335
C
1336
D
11
1337
A
Which of the listed modes of controls will identify the
device shown in the illustration?
Proportional-plusreset control
11
1338
C
The device shown in the illustration is known as a/an
__________.
offset directional
control valve
According to U.S. Coast Guard Regulations (46 CFR
Part 32), when reach rods to tank valves pass through
the deck, the stuffing box at this joint must be
__________.
A 12" X 8" X 8" simplex double-acting pump makes 100
strokes per minute. If the slip is 6%, the discharge rate
is __________.
An unsteady vacuum in a submerged tube evaporator
may be caused by __________.
grounded with
bonding straps
1339
C
11
1341
C
11
1342
C
cooling water
temperature to the
condenser
Screw
Which of the following types of hydraulic pumps would Lobe
be used in a steering system?
The amount of the cushioning effect developed within a position of the
adjustment of the
design shape of the
hydraulic cylinder is determined by the __________.
directional port in the cushion cavity check cylinder ends
valve
cushion cavity
11
11
does not revolve
Answer C
saturated steam
Answer D
poor quality steam
Volute
setting of the
cushioning
adjustment needle
valve
Single speed floating Derivative control
control
Two position
differential gap
control
three-position
pressure reducing
valve
water tight
spring centered
directional control
valve
gas tight
62.54 gpm
81.81 gpm
163.63 gpm
245.44 gpm
air leaks in the tube
nests
improper venting of
the tube nests
inadequate steam
quality to the air
ejector nozzles
high water level in
the shell
92
Illustr
GS-0148
throttle valve
GS-0032
made of nylon or
other nonmetallic
material
Book Num
11
1344
Ans
B
11
1346
B
11
1347
B
11
11
1348
1349
B
C
Question
An increase in the heat load to a refrigeration system
will cause __________.
Answer A
the compressor
suction pressure to
decrease
Answer B
the compressor
suction temperature
to increase
Answer C
increased ice
formation on the
evaporator coil
Answer D
excessive short
cycling of the
compressor
Generally, centrifugal pumps operating without a
regenerative pump
positive suction head must be primed before they will
move liquid on their own. The priming is usually
accomplished with a __________.
The process control mode shown in the illustration is an Proportional control
example of which of the listed modes of control?
rotating liquid piston
pump
jet pump
turbine pump
Integral control
Derivative control
On-off control
A hydraulic system directional control valve fitted with
'detent' will __________.
usually be shifted
into three specific
positions
be able to be varied have an offset,
through out the travel directional control
of the valve spool
only
No freight or
passengers are
allowed to be carried
when the vessel is
issued the permit.
The permit can only All of the above.
be issued upon
written application by
the master, owner, or
agent of the vessel.
the working pressure
of the system
stamped on both of
the end fittings
an inner tube
constructed of
seamless reinforced
polyester braid
a designed bursting
pressure of at least
four times the
maximum working
pressure of the
system
Which of the listed values represents the temperature
198° F (92° C)
of saturated vapor for water at a pressure of 14.7 psia?
212° F (100° C)
335° F (168° C)
414° F (212° C)
The discharge head of a centrifugal pump will vary
directly with the __________.
change in impeller
diameter
square of the
impeller diameter
cube of the impeller
diameter
impeller efficiency for
large changes in the
size of the impeller
The boiling point of water in an open container at sea
level is 212° F. If the pressure on the open container is
decreased, the boiling point will __________.
increase
decrease
increase and then
decrease
decrease and then
increase
A vacuum differential is maintained in the distillate
circuit between any two stages of a multiple stage
distilling plant by the use of a/an __________.
steam trap
butterfly valve
loop seal
adjustable controller
Which of the following is true concerning the issuance
The permit can only
and use of Coast Guard form 948 'Permit to Proceed to be issued if the
vessel currently has
Another Port for Repairs'?
a valid unexpired
Coast Guard
Certificate of
Inspection.
According to Coast Guard Regulations, flexible hoses
used as supply and return lines to hydraulic system
components, must have __________.
11
1350
D
11
1351
B
11
1353
B
11
1354
B
11
1355
C
have an infinite
number of valve
positions
the working pressure
of the system
stamped on one of
the end fittings
93
Illustr
GS-0147
Book Num
11
1357
Ans
A
11
1359
B
11
1361
B
11
1362
A
11
1363
C
11
1364
A
Question
A fixed orifice plate is generally installed in the live
steam supply to a flash evaporator. One of the functions
of this orifice is to control the quantity of the supplied
steam. A second function is to __________.
Answer B
Answer C
produce more useful guarantee that the
desuperheated
steam supply will
supply steam
remain saturated
Answer D
produce a low salt
water feed heater
shell absolute
pressure
air trapped in the
system
clogged suction line
fluid filters
abrasive matter
circulating in the oil
Which of the following terms would best describe the
Degree of saturation Saturation
temperature at which a liquid boils at a given pressure?
temperature
Superheated
temperature
Degree of superheat
In the illustration, the best way to make the pieces a
locational interference fit is to __________.
turn down the shaft
in figure "B", four to
five thousandths of
an inch
drill the hole eleven
thousandths of an
inch larger
do nothing, with a
large enough
hammer this will be a
locational
interference fit
heat the shaft until
the nominal diameter
is two hundred and
GS-0019
fifty thousandths of
an inch
When drilling a hole in a piece of work chucked in a
lathe, you should mount the drill chuck in the
__________.
A refrigerant with oil in solution has a __________.
compound rest
cross feed
tailstock
headstock
higher boiling
temperature for a
given pressure than
does a pure
refrigerant
Where a two-stage air ejector set is used in a two-stage takes suction from
flash evaporator, the first-stage air ejector takes suction the first stage of the
from the second stage of the evaporator, and the
evaporator
second stage air ejector __________.
lower boiling
temperature for a
given pressure than
does a pure
refrigerant
takes suction from
the second stage of
the evaporator as
well
boiling pressure
equal to that of a
pure refrigerant at a
given pressure
boiling point will not
be affected by
entrained oil
proportional action
steam pressure
transmitter
three-position,
directional control
valve
101.63 long tons
feedwater regulating fuel oil heater
value positioner
temperature
regulator
variable-position,
infinite-position,
directional control
directional control
valve
valve
154.16 long tons
199.87 long tons
unbalanced rudder
semi-balanced
rudder
The hydraulic system of a deck winch has been
drained, flushed, and refilled with hydraulic fluid. An
erratic knocking noise from the hydraulic motor when
the winch is started would indicate __________.
Answer A
reduce pressure
fluctuations of the
steam supply in the
salt water feed
heater
the fluid level in the
reservoir is too high
11
1365
C
11
1367
A
As shown in the illustration, the pneumatic force
balance unit could be used for a __________.
water level alarm
actuator
11
1368
A
The device shown in the illustration is typically called
a/an __________.
offset, directional
control valve
11
1369
C
11
1370
B
A centrifugal ballast pump has a capacity of 200 gpm. If 45.83 long tons
suction is taken on a ballast tank containing 200 long
tons of seawater, how much water will be remain in the
tank after discharging for one hour?
The rudder shown in the illustration is correctly termed
a/an __________.
balanced rudder
94
Illustr
takes suction from
is normally idle and
the first stage ejector used mainly as a
discharge
standby unit
contra-guide rudder
GS-0145
GS-0024
GS-0101
Book Num
11
1371
Ans
A
11
1372
C
11
1373
D
11
1374
C
11
1375
B
11
1376
A
11
1377
B
11
1378
B
11
1379
D
11
1380
C
11
1381
D
11
1382
A
11
1386
A
Question
Answer A
A vapor under pressure stays in contact with, and at the equilibrium contact
same temperature as the liquid from which it was
generated. The vapor and liquid in this situation are,
therefore, said to be in a/an __________.
Answer B
latent contact
In a flash type distilling plant, a screen is fitted over the the pump from
suction connection to the brine overboard pump in order cavitating
to prevent __________.
excessively large salt scale from passing
electrolysis from
crystals from
into the brine pump occurring in the
damaging the pump and clogging impeller pump
passages
In order to convert taper per inch to taper per foot, you
should __________.
Assume the normal refrigerant pressure is 14 psig in
the evaporator of the refrigeration system shown in the
illustration. If this pressure is increased, the
__________.
Packing extremely soft grease into a roller bearing will
cause __________.
add 12
Centrifugal pumps, used to handle hot liquids, must
have a minimum flow through them under all operating
conditions. This flow serves to __________.
Over tightening of the valve stem packing to a
pneumatically controlled final control element, shown in
the illustration, will cause __________.
Hydraulic system reservoirs are often fitted with a
combined filler/breather cap. If the breather element
becomes fouled, the __________.
Coast Guard Regulations (46 CFR) concerning shutoff
valves located inside fuel oil tanks, state that the valves
__________.
A pneumercator is useful in measuring __________.
subtract 12
Answer C
critical state
divide by 12
chill box temperature receiver temperature refrigerant boiling
will decrease
will increase
temperature will
increase
Answer D
superheated state
multiply by 12
evaporator
temperature will
decrease
emulsification of the
thickener additive
gelling of the base oil
maintain hydraulic
differential in the
pump impeller
passages
reduced controlled
offset
keep the shaft glands
cool
reservoir will become reservoir will be
pressurized
subjected to a partial
vacuum
shall be arranged for must be made of
local control
steel
flow through the
return lines will be
stopped
must be power
operated
actuator response
time will be halved
relative humidity
liquid levels in tanks
fluid pneumercations
excessive channeling high temperatures to
of the grease
develop as result of
churning
prevent overheating maintain the net
positive suction head
and vapor bound
of the pump
conditions
valve stem breakage erratic operation
air pressure
overheating of the
diaphragm
may be made of cast
iron
Machinery operating features are designed to help
conserve energy. Which of the following results will not
contribute to energy conservation?
Reduction of friction. Insulation of hot
surfaces.
Lubrication of moving Elevation of heat
parts.
exchanger overboard
outlet temperatures.
On which of the following heated surfaces of a flash
type evaporator would you be more likely to find soft
scale formation?
The total static head of a system resisting the operation
of a centrifugal pump is the difference in elevation
between the __________.
Feedwater heater
internal tube
surfaces.
discharge liquid level
and the suction liquid
level
Flash chamber
vertical surfaces.
95
Internal distillate
cooler tubes.
discharge liquid level suction liquid level
and the pump
and the pump
centerline
centerline
Illustr
Distilling condenser
tubes.
suction submergence
level and the pump
discharge
RA-0005
GS-0051
Book Num
11
11
11
1389
1391
1392
Ans
D
D
1393
C
11
1394
D
11
1395
B
11
11
1396
1398
1399
Answer B
Defer informing the
Coast Guard of the
pump's replacement
until the mid-period
inspection.
Answer C
Inform the Coast
Guard if the
replacement will
involve welding or
burning.
Answer D
Replace the pump,
as the Coast Guard
need not be informed
of the pump
replacement.
If 1 Horsepower equals 42.45 BTU's per minute, then
1 ounce (28.3 g) of
the energy required to lift a 1 pound (.454 kg) weight,
water 1° F (.55° C)
778 feet (.24 km), against the force of gravity, would be
the same as the number of BTU's required to raise the
temperature of __________.
1 quart (.95 l) of
water 1° F (.55° C)
1 gallon (3.78 l) of
water 1° F (.55° C)
1 pound (.454 kg) of
water 1° F (.55° C)
Which of the following statements concerning the
operation of a single-acting hydraulic ram is correct?
The single-acting
ram is both extended
and retracted by
means of hydraulic
force.
The single-acting
ram is not retracted
by means of
hydraulic force.
Hydraulic force
applied to a singleacting ram results in
a pulling motion.
Coast Guard Regulations (46 CFR) require a single tail 2 years
shaft with water lubricated tail shaft bearings, stressrelieved keyway, and fabricated from materials resistant
to corrosion by sea water, to be drawn and examined
once in every __________.
3 years
5 years
8 years
Excessive oil foaming in the crankcase of a refrigeration has run continuously
for a long period
compressor is most likely to occur when the
compressor __________.
The purpose of the instrument illustrated is to
gage resistors
__________.
suction pressure is
below normal
oil level is below
normal
starts after a long
idle period
measure wire
diameter
measure insulation
thickness
strip insulation from
wire
C
11
11
Question
The Certificate of Inspection for your vessel was issued
in January. In March of the same year you need to
replace a cooling water pump for the refrigeration
system. What action would be appropriate?
D
Hydraulic force is
applied
simultaneously in two
directions against the
ram by directional
ports.
Which of the following statements is correct with
regards to the operation of a centrifugal cargo pump?
Oil is discharged
Gravity causes the
from the center of the oil to flow toward the
impeller through the discharge.
outlet.
The self-priming
feature of the
centrifugal pump
enables it to draw its
own suction as it
starts.
The discharge
capacity varies
directly with the
speed of the
impeller.
Some fluid filters used in hydraulic systems are
designed to cope with increasing pressure differentials
by __________.
diverting the flow
automatically to the
standby filter of the
duplex unit
45.83 long tons
automatically
securing the system
diverting the pump
discharge directly
back to the suction
183.32 long tons
254.17 long tons
D
B
Answer A
Inform the nearest
Officer in Charge,
Marine Inspection of
the pump
replacement.
A ballast pump, with a capacity of 200 gpm, takes
suction on a tank containing 300 long tons of sea water
ballast. How much ballast will remain in the tank after
pumping for one hour?
96
automatically
bypassing the fluid
via an internal valve
arrangement
91.66 long tons
Illustr
GS-0079
Book Num
Ans
11
1400
A
11
1401
A
11
1402
A
11
1403
D
11
1404
C
11
1405
B
11
1406
C
11
1408
A
Question
Answer A
Your vessel is departing at 1800 hours on a voyage of 0600 hours
more than 48 hours duration. Coast Guard Regulations
(46 CFR) require that the steering gear be examined
and tested no earlier than __________.
1409
D
11
1410
B
Answer C
1200 hours
Answer D
1500 hours
The equation 'energy in = energy out' is a simple way of
stating the principle of the __________.
With oil bath lubrication of ball bearings in a cargo
pump, the oil level should __________.
conservation of
energy
never be higher than
the center of the
lowest ball in the
bearing housing
conservation of
matter
cover the bottom of
the pump shaft
conversion of matter
to energy
cover the top ball in
the bearing housing
conversion of energy
to matter
be kept at the top of
the oil reservoir
The vessel has its propulsion machinery located
amidships, using a water lubricated stern tube bearing,
to carry a tail shaft of a 15 inch (38.1 cm) diameter.
During the inspection the wear between the stern tube
and the bearing surface was measured as 1/4 "(
0.635cm). Which of the following actions should be
carried out as a result of this measurement?
Pull tail shaft and
replace the bronze
liner.
Pull tail shaft and
replace the lignum
vitae.
Pull tail shaft and
buildup the bronze
liner.
Nothing, as the
reading is within the
allowable limits.
In a compression refrigeration cycle, the temperature of
the liquid refrigerant experiences its greatest decrease
in the __________.
Which of the instruments listed is used to measure the
gauge of a piece of sheet metal?
A recirculating, or bleed off line is installed on a
centrifugal pump in order to __________.
evaporator
compressor
expansion valve
condenser
Gauge calibrator
Wire gauge
Inside micrometer
Circular mil
establish a back
pressure at the
labyrinth seal to
eliminate leakage
reduce or stop the
output action of the
actuator
The renewal of a
superheater safety
valve with one of the
same kind that was
certified by a Coast
Guard inspector at
the place of
manufacture.
equalize pressure on prevent the pump
both sides of the
from overheating
suction valve disc
when operating at
shutoff head
cause leaking of the rupture the pump
flexible line
discharge piping
connections
A vessel being
A hydrostatic proof
placed in dry-dock
test at design
for the purpose of
pressure, conducted
repainting the
by the ship's force, in
underwater portion of which the safety
the hull.
valves were gagged
to test a tube
plugging repair.
decrease the net
positive suction head
level
flow
An improperly maintained filter used in a hydraulic
system can __________.
Which of the following would require the Officer in
Charge, Marine Inspection be notified?
11
Answer B
0900 hours
A pneumercator is used to indicate fuel oil __________. pressure
97
temperature
all of the above
All of the above.
Illustr
Book Num
Ans
11
1411
C
11
1412
A
11
11
11
1414
1417
1419
B
A
1420
A
11
1421
C
11
1422
A
11
1425
B
1426
By which of the following means is force efficiently
provided to vary the pitch of the blades on a modern
controllable pitch propeller?
Which of the listed statements is correct concerning
refrigeration systems?
Hydraulic
Mechanical
Answer C
The total quantity of
energy in the
universe is always
the same.
Pneumatic
Dehydrators must be
used continuously in
a refrigeration
system.
A 25 ton refrigeration
system has the same
cooling effect as
melting 25 tons of ice
in 24 hours.
A thermostatic
expansion valve is
used to control
refrigerated space
temperature.
The liquid receiver
functions to collect
and remove
noncondensable
gases.
When the vessel's steering wheel on the navigation
bridge is turned, the difference existing between the
position of the wheel and that of the rudder is known as
__________.
A ballast pump with a capacity of 200 gpm (757 lpm) is
used to fill a ballast tank with seawater. If the pump
discharges seawater into the tank for one hour, how
many tons of saltwater ballast have been taken
onboard?
Double seated, pneumatically controlled, regulating
valves exhibit good balancing characteristics essential
for low-sensitivity applications because __________.
proportional band
the error signal
the reset signal
feedback
B
11
11
Question
Answer A
Answer B
Which of the following statements concerning energy is Energy can be
Energy may not be
correct?
created or destroyed. transformed.
B
Answer D
None of the above.
Electrical
45.85 (46.5 t metric) 48.53 (49.32 t metric) 51.58 (52.43 t metric) 54.38 (55.3 t metric)
high pressure enters they employ a
between the seats
specially fabricated
diaphragm
and creates equal,
but opposing forces
the feedback control
signals balance the
opposing forces
acting on the
diaphragm
the special
diaphragm motor
spring resists
pressure changes
The quantity of heat required to raise the temperature of latent heat
a unit mass of a substance 1° is known as __________.
sensible heat
After cutting a piece of tubing to be flared, you should
__________.
remove inside burrs
with a reamer
rough up the outside flare the tube before crimp the tube end in
surface of the tube
removing the burrs
order to slip on the
end with a file
fitting
To measure the circumference of a piece of pipe, you
should use a __________.
When a centrifugal pump is operating with a positive
suction head, the inner end of the stuffing box is
__________.
machinist's steel rule flexible steel rule
under a vacuum and
air tends to leak into
the pump through the
shaft stuffing box
98
specific heat capacity variable heat
hook rule
under a pressure and sealed by a vacuum
fluid may tend to leak and no leakage will
out from the pump
occur
along the shaft
through the stuffing
box
folding rule
sealed by the seal
cage or pump lantern
ring
Illustr
Book Num
Ans
11
1427
B
11
1428
C
Question
Which of the following control actions, when combined
with proportional-position action, will eliminate manual
repositioning of the set point for each load change to
produce an automatic reset action?
Answer A
Neutral band
Answer B
Floating action
act as a shock
absorber
maintain the stored
oil under pressure
Answer C
Reciprocal action
Answer D
Rate action
11
1429
C
A reservoir, as used in hydraulic systems aboard ship,
is used to store hydraulic oil. Another function is to
__________.
According to U.S. Coast Guard Regulations (46 CFR
Part 92), how many means of escape must be provided
in spaces where the crew may be quartered or
employed?
Sublimation heat
Critical point heat
1431
B
Which of the following terms is used to indicate that the Latent heat
addition of heat will result in a temperature change?
Sensible heat
11
11
1432
A
One turn of the micrometer barrel will linearly move the 0.025 inch
spindle __________.
.2500
What is the maximum tail shaft to stern tube bearing
clearance (at the after end of the stern tube) for a
vessel in ocean service, with an aft machinery space, a
14" diameter tail shaft, and a water lubricated stern tube
bearing constructed of material other than rubber?
0.205 inch
0.250 inch
0.110 inch
.3125
.3740
.4375
Frost appearing on one set of evaporator coils of a multi- increase the value of will assist in
superheat to the fluid increasing the
box, direct expansion type refrigeration system
__________.
leaving the coils
refrigeration effect
can be removed by
passing hot vapors
through the coils
To set the dividers to the proper radius, you should use
a __________.
Theoretically, a double suction impeller is in hydraulic
axial balance. In actuality this balance is rarely achieved
due to __________.
can be quickly
removed by simply
shutting off fluid flow
to the coils
calipers
11
1433
B
11
1434
C
11
1435
C
11
1436
B
Which of the following statements expresses the
function of proportional-plus-reset action?
11
11
1437
1438
B
D
One function provided by a hydraulic accumulator is to
__________.
Two, both of which
must be through
watertight doors.
act as a base or
foundation for the
power unit
Two, both of which
Two, at least one of
are located as close which shall be
together as possible independent of
to centralize escape watertight doors.
routes.
eliminate pressure
surges in the system
Two, both of which
must be vertical
ladders terminating
in locked watertight
scuttles.
micrometer
scribing circle
steel rule
an unbalanced force
exerted from the
direction of the
impeller nearest the
driving motor
The action measures
the rate of time of the
final control element.
unequal or nonuniform flow to the
suction eyes of the
impeller housing
excessive sealing
water flow to the
stuffing box
flexible shaft design
which causes rapid
wear of the outboard
shaft bearing
The action gives
control without offset
under all load
conditions.
The action combines
proportional-position
action and rate
action.
The action is very
unstable for anything
but constant load
conditions.
act as an oil and
water separator
absorb shocks
occurring in the
system
provide an area
provide an area to
where air can
separate solid
separate from the oil contaminants from
the oil
99
Illustr
Book Num
Ans
Question
Answer A
In accordance with Coast Guard Regulations (46 CFR), the voyage is
it is the duty of the Chief Engineer to acquire and seal a completed
sample of fuel oil received whenever fuel oil bunkers
are taken. This sample must be preserved until
__________.
Answer B
Answer C
Answer D
that particular supply it can be sent ashore return to the first U.S.
of oil is exhausted
to the proper oil
port where upon it
company personnel must be sent ashore
for testing and the
for chemical analysis
results entered in the and the findings
Oil Record Book, CG- submitted to the
480
nearest Officer in
Charge, Marine
Inspection
11
1439
B
1440
C
The device shown in the illustration is used to determine flash point of oil
the __________.
pour point of oil
11
11
1442
A
If a micrometer were opened to a distance of 0.0001
inch, you would say the reading is __________.
ten one thousandths one millionth of an
of an inch
inch
11
1445
C
11
1446
C
11
1447
A
11
1448
B
11
1449
C
11
1450
C
11
1452
B
11
1453
A
one ten thousandth
of an inch
The best method of determining the number of threads thread tool gage
per inch of a bolt or screw would be through the use of
a __________.
Shim stock thickness is measured by a/an __________. shim gage
viscosity of oil
lubricating qualities
and film strength of
oil
ten millionths of an
inch
machinist's scale
screw pitch gage
screw thread
micrometer
feeler gage
outside micrometer
inside micrometer
A controller with floating action has a controlled variable
where the range of values produces no motion of the
final control element. This range of values is called the
__________.
When the illustrated device is in the process of opening
the associated valve, the motor will be secured by the
action of the __________.
Your vessel has taken on 25,000 gallons of fuel with an
API gravity of 30.4 at 60° F. Using the table shown in
the illustration, how many long tons of fuel have you
taken onboard?
An arrow superimposed on a hydraulic graphic symbol
at approximately 45°, as shown in the illustrated figures
A, B, and C, indicates the component __________.
neutral zone
set point
control point
offset
torque switch
limit switch
manual stop only
disengaging of the
splined dog clutch
To check the thickness of a piece of thin shim stock
before using it to make a bearing shim, you should use
a __________.
When the tail shaft is drawn from a vessel in dry-dock,
which of the following inspections is required to be
carried out?
63.57 long tons
72.48 long tons
81.22 long tons
Illustr
GS-0069
GS-0027
90.97 long tons
GS-0149
is pilot controlled
is pressure
compensated
can be adjusted or
varied
allows flow in one
direction only
feeler gage
micrometer
machinist's rule
depth gage
The propeller hub
taper and shaft
keyway should be
inspected for cracks
or corrosion.
The stern bearing
alignment with the
stern frame should
be checked.
The interior of the
The shaft liner
stern tube should be should be removed
inspected for leaks. and inspected for
cracks.
100
GS-0068
Book Num
Ans
11
1454
B
11
1455
C
11
11
1456
1457
B
D
11
1459
D
11
1460
B
11
1461
A
11
1462
C
11
11
1463
1464
C
D
11
1465
D
11
1466
A
Question
If the evaporator coil of a single box, air cooled
refrigerator accumulates frost, the compressor will most
likely __________.
The best tool to use to measure the number of threads
per inch on a bolt is a __________.
Compared to globe and angle valves, gate valves
__________.
Answer A
run continuously
Answer B
short cycle on low
pressure cutout
Answer C
short cycle on high
pressure cutout
Answer D
fail to start
micrometer
tap
screw pitch gauge
pair of outside
calipers
cannot be used for
service requiring
infrequent operation
are more suitable for operate with little or
throttling
no pressure drop
when fully opened
are more easily
repaired
One disadvantage of proportional-position action is that corrective action is
__________.
only proportional to
offset
the controlled
the corrective action
variable is stabilized is only proportional to
the deviation
Which of the following conditions require the Coast
Guard Officer in Charge of Marine Inspection be
notified?
exact correction can
be made only when
there is no change in
load
Replacement in kind Breaking of a safety
of ship's service 265 valve seal.
psi air receiver.
Vessel to undergo an All of the above.
unscheduled drydocking solely for the
purpose of painting
the underwater
portion of the hull.
In the design of hydraulic piping and equipment
consideration is given to minimize turbulence in the
hydraulic fluid, as this will cause __________.
The quantity of heating steam supplied to the feed
water heater of a two-stage flash type distilling plant is
held relatively constant by a/an __________.
molecular fluid
vibration
energy losses
wide pressure
variations
mechanical damage
to control valves
orifice plate
attemporator
back pressure
regulator
first-stage bypass
valve
To measure the diameter of a piece of round stock, you
should use a __________.
When using the circular magnetic particle method to
nondestructively test a weldment, the best results are
obtained when the __________.
dial indicator
wire gauge
micrometer
circular slide rule
current is flowing at
right angles to the
discontinuity
magnetic field is
parallel to the
discontinuity
magnetic field is at
right angles to the
discontinuity
defect is located
outside the parallel
flux path of the prods
If a refrigeration compressor is running continuously
without lowering the temperature in the refrigerated
space, the trouble may be __________.
a shortage of
compressor oil
warm food in the
refrigerator
excessive condenser a shortage of
cooling water
refrigerant
The temper is likely to be drawn out from a chisel edge
when you __________.
hold it next to a wet
grinding wheel
soak it in hot oil for
lengthy periods
grind the cutting
angle too small
grind it for long
periods of time with
excessive pressure
Which of the valves listed should be used either in the
fully opened or the fully closed position?
a gate valve
a globe valve
any check valve
any needle valve
101
Illustr
Book Num
11
11
1467
1469
Ans
A
B
11
1470
B
11
1471
A
11
1472
C
Question
A two-position single-point action controller has been
adjusted to minimize cycling and would only be suitable
for __________.
If a lifeboat winch allows a lifeboat to descend to the
water at an excessive speed, you should __________.
Answer A
constant load
conditions
Conduction
Natural convection
All of the above
inside micrometer
small hole gauge
inside spring caliper
During tests to discover why a refrigeration compressor leaking door gaskets high cooling water
temperature
is running excessively, it is determined that the
refrigerated space temperature is nearly normal, the
suction pressure is slightly above normal, and the head
pressure is low. In this situation, you should check for?
air in the system
a shortage of
refrigerant
pieces may fly off the
chisel and injure your
eyes
installed with the
stem down
the hammer head
may be chipped
floating rate of the
proportional-speed
floating component
value representing
the readjusted
controlled variable
limit switch
two-position, micro
switch
it must be held firmly
by the head to strike
it
used to throttle or
regulate the flow of
liquid
desired
prepositioned value
of the controlled
medium
manual, push button
only
GS-0027
78.92 long tons
81.22 long tons
88.40 long tons
1475
B
A chisel with a mushroom head should not be used
because __________.
the chisel cannot be
struck squarely
11
1476
A
A gate valve installed in a pipeline should be
__________.
used in either the
fully closed or fully
opened position
desired value of the
proportionally
controlled variable
11
1478
A
11
1479
B
engage the motor
friction clutch bands
Radiation
Which of the following modes of heat transfer does
NOT require any physical contact between a warmer
and a cooler substance?
To get an accurate inside measurement of the diameter depth micrometer
of a 1/2 inch hole, you should use a/an __________.
11
B
Illustr
22,105,000 inch
pounds
A
When a controller is provided with reset rate
adjustment, a change in this adjustment results in a
change of the __________.
When a non-butterfly valve is closed, the motor of the
device illustrated will be secured by a __________.
torque switch
Your vessel has taken on 25,000 gallons of fuel with an 69.74 long tons
API gravity of 35.1 at 60° F. Using the table shown in
the illustration, how many long tons of fuel has been
actually taken on board?
102
44,210,000 inch
pounds
Answer D
rate action only
The rudder torque capacity of the four ram steering gear 11,052,500 inch
illustrated, is rated at 44,210,000 inch-pounds with one pounds
power unit in operation. If the four ram system was able
to be operated as a two ram system with both power
units on line, what would be the available torque?
1474
1477
Answer C
wide temperature
fluctuations
remove unnecessary adjust the centrifugal adjust the davit
weight from the boat brake mechanism
mounted limit
switches
11
11
Answer B
intermittent load
conditions
88,420,000 inch
pounds
GS-0067
used for steam
service only
GS-0149
Book Num
11
11
1480
1482
Ans
C
B
11
1484
B
11
1485
A
11
1486
A
11
1488
B
11
1489
C
11
1491
B
Question
Energy losses occurring in a hydraulic system are
ultimately absorbed by the __________.
Answer A
reservoir expansion
chamber
Air compressor cylinder unloaders enable the
compressor to __________.
vary their speed
start and come up to change speed
according to
speed before air
according to
temperature and load compression begins overload demands
Which of the conditions listed will cause a refrigeration
compressor to run constantly without simultaneously
decreasing the temperature in the refrigerated space?
Shortage of
refrigerant oil.
Slight shortage of
refrigerant.
What precautions should be followed when using a
chisel having a mushroomed head?
Remove the ragged
edges by grinding.
Do not strike the
Use only light
mushroomed portion. hammer blows with
the chisel.
only with the stem
only for lube oil
facing down
service
Knock off the ragged
edges with a
hammer.
to throttle the flow of
liquid
limit switch
two-position, micro
switch
manual, push button
only
force is the greatest
on the arc AB
force is the greatest
on the arc DC
Convection
Each of the above
A gate valve installed in a piping system should be used in either fully closed
__________.
or fully opened
positions
The device shown in the illustration is used to open and torque switch
close a butterfly valve. The motor will be typically
secured during the closing phase by the use of the
__________.
When pressure is applied to a Bourdon tube-type
pressure is the
pressure gage, it will begin to unbend. The reason for
greatest on the arc
this action is that the __________.
AB
Which of the listed methods of heat transfer takes place Radiation
when two substances of different temperatures are in
physical contact with each other?
The unloading system on an air compressor will
__________.
11
1492
C
11
1494
B
11
1495
B
11
1496
D
Answer B
hydraulic piping
flexibility
pressure is the
greatest on the arc
DC
Conduction
Answer C
atmosphere as heat
Answer D
fluid as friction
reduce compressed
air charge density
Excessive condenser Faulty expansion
cooling water flow.
valve.
increase compressor increase compressor allow the motor to
discharge pressure operating speed as turn the compressor
on demand
necessary
opposed only by
friction
reduce the
compressor frictional
load when starting
A warmer than normal compressor suction line might be insufficient
caused by __________.
lubrication
insufficient
refrigerant
excess refrigerant
Solder used for joining metal surfaces should have a
__________.
melting point lower
than that of the
metals being joined
coating of Borax flux composition of lead
to raise the melting and tin if the solder is
point
the 'hard' type
slots or keyways
half-round grooves
The proper use of a flat chisel is for cutting
__________.
fusing point much
higher than that of
the metals being
joined
inside corners
103
Illustr
excessive opening of
the expansion valve
flat stock
GS-0027
GS-0114
Book Num
11
1497
C
11
1498
D
Question
The amount of change of a controlled variable that is
necessary to cause a specific change in the position of
the final control element depends upon the
__________.
The device depicted in the illustration is used to
__________.
11
1499
D
Which problems can occur if the brake band lining of a
wildcat brake becomes excessively worn?
11
1501
Ans
C
11
1502
A
11
1503
A
11
11
11
11
1504
1505
1506
1507
D
B
Which of the following conditions must exist for heat to
flow from one object to another?
Answer B
range of valve
opening
Answer C
proportional band
adjustment of the
controller
Answer D
form of the controlled
medium
jack over the main
engine
power an elevator
car
power a centrifuge
remotely open piping
system valves
GS-0026
The driving engine
will overspeed.
The anchor will
immediately drop.
The clutch will
overheat.
Illustr
prevent water
accumulation in air
lines
reduce motor starting vary compressor
voltage
speed
Place drip pans
under leaky fittings.
Seal any cracks in
Coat all threads with
lines with Permatex. graphite oil.
The brake's
effectiveness will be
reduced.
The two objects must The two objects must There must be an
There must be an
be in physical
be the same size.
existing temperature existing weight
contact.
differential.
differential.
remove all but the
friction load on the
compressor motor
when starting
How can the chance of contaminating hydraulic fluid be Clean the fittings
decreased when working on hydraulic systems?
before they are
disconnected.
In the refrigeration system, a shortage of refrigerant is
the compressor short
indicated by __________.
cycling on high
pressure cut out
switch
The overboard discharge valves in the bilge system
gate valves
illustrated are __________.
The function of an unloader on a two-cylinder, twostage medium pressure, air compressor is to
__________.
high suction pressure high head pressure
stop-check valves
bubbles in the sight
glass
gate valves operated swing check valves
operated from above
from above the
GS-0042
bulkhead deck
the bulkhead deck
The illustrated device operates on the principle that the
height of the liquid in gage "C" is __________.
directly equal to the proportional to the
equal to the fluid
height of the liquid in height of the liquid, H pressure supplied at
the tank
D after a small
portion of the fluid
from the tank forced
into column C
proportional to the
pressure of the cube
root of the height of
liquid H, times .491
GS-0066
The response line installed in a pneumatic proportional
action controller functions to __________.
monitor the accuracy provide a feedback
of the measuring
signal for accurate
element
final element
positioning
readjust the total
spring force in the air
control relay
B
B
Answer A
differential gap
adjustment
104
regulate the air
supply in the line to
the nozzle
Book Num
11
1508
Ans
Question
A non-rising stem gate valve should __________.
B
Answer A
be completely
opened with the
handwheel locked
hard at the end of the
last opening turn
Answer B
be opened to the end
of the last opening
turn, then rotate the
handwheel in the
closing direction by
approximately 1/4 of
a turn
Answer C
be opened by 1/2 of
the total number of
turns available from
full closed to full
open
Answer D
be opened as much
as needed,
regardless of how
little the gate has
been moved from its
seat
163.23 long tons
171.48 long tons
182.82 long tons
11
1509
B
11
1510
B
Your vessel has just taken aboard 1200 barrels of fuel 155.88 long tons
with an API gravity of 30.9 at 60° F. Referring to the
table shown in the illustration, how many long tons of
fuel have you taken aboard?
An electric power failure occurring in a electro-hydraulic automatically swing
steering gear would cause the rudder to __________.
35° right or left
11
1511
B
In a reciprocating pump, the position of the pilot valve is main steam piston
controlled by the position of the __________.
valve
piston in the steam
cylinder
automatically shift to jam against the
the midship position rudder emergency
stops
cushioning valve
governor valve
spindle
Condensate must be drained from the intercooler and
the cooling effect of
aftercoolers of an air compressor because __________. the condensate
reduces the
compressor's
efficiency
a danger of
explosion exists
whenever water is
present in a
compressor
water contamination
causes erratic
operation of
pneumatic
components
If a refrigeration system were short of refrigerant, the
condition would result in __________.
continuous running
of the compressor
high suction pressure high discharge
pressure
The bilge pump suction manifold, shown in the
illustration, is provided with __________.
four stop valves
four stop-check
valves
Tinning a soldering iron will __________.
prevent the tip from
overheating
11
1513
C
11
1514
A
11
1515
B
11
1516
D
11
1517
C
When a controller with proportional position action is
offset
used to control a process, a load change will cause the
controlled variable to stabilize at some value other than
the set point value. The new point at which the
controlled variable stabilizes is called __________.
The handle of a butterfly valve must be __________.
11
1518
D
GS-0149
remain locked in its
last position
the volumetric
capacity of the first
stage is reduced if
water remains
protect the tip from
scratches
three normally
opened valves and
one normally closed
valve
add extra weight to
the tip
short cycling of the
compressor on the
water failure switch
three normally closed
valves and one
GS-0042
normally opened
valve
prevent tip oxidation
when heated
deviation
control point
load point
parallel to the axis of forty-five degrees to
flow when the valve the axis of flow when
is closed
the valve is fully
open
105
Illustr
either at 0° or 90° but parallel to the flow
never at any other
when in the fully
angle regardless of open position
flow rate
Book Num
Ans
11
1519
D
11
1520
A
11
1521
B
11
1523
C
11
1524
D
11
1525
A
11
1526
C
11
1527
A
11
11
1528
1529
C
A
11
1530
D
11
1531
C
11
1532
C
Question
The purpose in constructing a pipe tunnel aboard a
vessel is to __________.
Answer A
insulate piping from
ambient
temperatures
Answer B
provide convenient
grouping of all piping
leading fore and aft
from the machinery
space for easy
access and control
Answer C
enclose all pipes
leading to a single
forward compartment
in their own
enclosure
Answer D
segregate a pipe
from the
compartment through
which it passes
When air becomes trapped in the hydraulic fluid of a
steering system, the __________.
Before starting a reciprocating, steam-driven pump that
has been idle for a period of time, you should
__________.
The air charge leaving an intercooler, or aftercooler of
an air compressor can be expected to be __________.
rudder will respond
sluggishly
open the steam line
root valve
hydraulic rams will
overspeed
drain the steam
cylinder
sight glass will show
bubbles
close the steam
cylinder drains
ram relief valves will
lift
open the liquid
cylinder drains
superheated
supercooled
at or below the dew
point
all of the above
Noise in a refrigeration compressor can be caused by
__________.
Thermal energy is commonly referred to as
__________.
Soldering flux aids the soldering process by
__________.
The cylinder unloading mechanism used on low
pressure air compressors is an example of which mode
of control?
Valves used in the machinery space piping systems,
and constructed with threaded valve stems, must be
__________.
worn bearings and
piston pins
heat
slugging due to
flooding back
power
too much oil in
circulation
horsepower
all of the above
foot-pound
softening the metals fusing the metals
removing oxides
hardening the metals
Two position
Derivative
Integral
Single speed floating
right-hand opening
(clockwise)
left-hand closing
(counterclockwise)
right-hand closing
(clockwise)
direction of opening
and closing is
unimportant
A compressor used in a multi-box refrigeration system, 100%
has six of its eight cylinders controlled for variable
loads. If only one of five reefer boxes is active what
percentage of the controlled cylinders will be unloaded?
66%
33%
0%
Air trapped in the hydraulic fluid of a steering system
would be indicated by __________.
hammering noises in popping or sputtering all the above
the equipment or
noises
transmission lines
Illustr
RA-0013
an improper rudder
response
Which of the chisels listed should be used for cutting oil Diamond point
grooves?
To determine the diameter of a small hole, which of the A Center gage
listed tools must be used with inside calipers to get an
accurate reading?
106
Flat cold
Round nose
Square nose
Wire gage
Micrometer
None of the above
Book Num
Ans
11
1534
B
11
1535
D
11
1536
D
11
1537
B
11
1538
D
11
1539
B
11
1540
B
11
1541
C
11
1542
A
11
1544
A
11
1545
C
11
1546
B
11
1547
C
Question
Answer A
'Flooding back' is a condition where the liquid refrigerant vaporizes in the
__________.
condenser
The energy associated with molecules is known as
__________.
Flux is used when soldering, in order to __________.
kinetic energy
Answer B
reaches the
compressor through
the suction line
Answer C
flashes in the liquid
line
Answer D
condenses in the
receiver
potential energy
mechanical energy
thermal energy
Illustr
decrease the melting make the solder 'flow' ensure proper tinning clean the joint area
point of the solder
Which of the following proportional band values most
closely approaches 'ON-OFF' control?
Steam traps should be installed at the lowest outlet
point of the heat exchanger in a horizontal run of pipe.
Which of the following installation considerations should
also be maintained?
-10%
2%
They should be
They should be
installed with their
installed unpainted
main axis horizontal. and wrapped in an
insulation blanket.
A bypass around the They should remain
trap is unnecessary if uninsulated and
the steam input
unpainted.
pressure never
exceeds 10 psig.
Over greasing of ball bearings installed on pumps will
result in __________.
Air trapped in the hydraulic fluid of a steering system
should be indicated by __________.
On small passenger vessels of less than 100 gross
tons, watertight doors and watertight hatches are
__________.
smoother pump
operation
the pump
overspeeding
not required to be
marked
reduced corrosion in
the bearing
bubbles in the sight
glass
require to be marked
on both sides in
clearly legible letters
at least 25
millimeters ( 1 inch)
high
The illustrated valve is recommended for use
__________.
as either fully opened in throttling fluid flow in allowing flow in
or fully closed
one direction only
in lube oil systems
exclusively
While troubleshooting a refrigeration system for low
head pressure, liquid refrigerant flooding back from the
evaporator is determined to be the cause. It may be
necessary to __________.
A machine capable of producing 1650 foot-pounds of
work per second is considered to produce how much
horsepower?
Soft solders have relatively low melting points and
consist mainly of __________.
Increasing the 'reset rate' of a proportional-plus-reset
controller __________.
change the
expansion valve
adjustment
overheating of the
bearing
an improper rudder
response
required to be
marked, but on only
one side
100%
500%
increased pump
capacity
ram relief valves
lifting
none of the above
purge air from the
condenser
clean the waterside
of the condenser
1 hp
readjust the water
regulating valve to
increase the flow of
water
2 hp
3 hp
4 hp
silver base alloys
lead base alloys
copper base alloys
nickel base alloys
narrows the
proportional band
widens the
proportional band
repeats the
proportional action
more frequently
increase the stability
of the controller
107
GS-0047
Book Num
Ans
11
1548
C
11
1549
D
11
1550
A
11
1551
D
11
1553
A
11
1554
D
11
1555
A
11
1556
A
Question
The quantity of condensate passing through the
illustrated steam trap will be reduced as the
__________.
Answer A
amount of vapor
contained in "A"
decreases
Answer B
amount of liquid
contained in "A"
increases
Answer C
amount of vapor
contained in "A"
increases
Answer D
Illustr
vapor pressure of the
liquid contained in
GS-0005
"A" decreases
Ball bearings may become overheated if they are
__________.
If a severe leak develops in the electro-hydraulic
steering gear, which of the listed conditions could
result?
The best type of chisel to use for cutting a keyway is the
__________.
On small, low pressure, air compressors, the cylinders
are usually lubricated by the __________.
packed with too
much grease
Loss of vessel
steering
mounted on a
misaligned shaft
Overheating of the
gyrocompass
not lubricated
all of the above
Jamming of the sixway valve
Jamming of the
follow-up device
round nose chisel
flat cold chisel
diamond point chisel cape chisel
splash method
mechanical force
feed lubricators
detached sump
method
To correct the condition of slugging and flooding back in
a refrigeration system, it may be necessary to
__________.
In a double-effect distilling plant, liquid moisture
remaining entrained in the first-effect vapor, is removed
by __________.
Power is defined as the __________.
re-adjust the
discharge pressure
clean the expansion
valve screen
add refrigerant
baffles and vanes
a flash chamber
the second effect
separator
the vapor feed heater
amount of force
needed to overcome
friction
aids the reset action aids the reset action
during increasing
during decreasing
error transients
error transients
amount of work
accomplished
distance through
which an object is
moved
and reset action are
completely
independent of one
another in the
controller operation
steam occupies the
area labeled "I"
the drop in pressure
at "B" lowers the
vapor pressure of the
condensate below its
current saturation
pressure
When 'reset' action is added to proportional action, the
proportional action __________.
11
1557
B
In the operation of the illustrated steam trap,
condensate will continue to pass through the outlet as
long as __________.
11
1558
B
11
1559
D
11
1560
A
11
1561
A
If a ball bearing for a centrifugal pump is completely
packed with grease, __________.
Which of the listed devices would be installed at a
control system air pressure reducing station?
Solder is an alloy of __________.
rate of doing work
the drop in pressure
at "B" does not lower
the pressure of the
condensate below its
current saturation
pressure
opposes the reset
action during
increasing error
transients
internal cooling
passages in the
crankshafts and
connecting rods
adjust the expansion
valve
the pressure in area
"H" is at least 85% of
the pressure in area
"I"
the bearing may heat grease may flow out early failure may
up
of the seals
result
Moisture separator
Vacuum breaker
Lubricator
Non-return valve
tin and lead
silicon and selenium
108
beryllium and
antimony
copper and lead
all of the above
GS-0002
Book Num
Ans
11
1562
A
11
1563
B
11
1564
C
11
1565
B
11
1566
D
11
11
11
1567
1568
1569
Question
In the figure shown in the illustration, the standard
blueprint symbols above the letters "A", "B", and "C"
indicate __________.
Air line lubricators are used in compressed air systems
to lubricate __________.
1570
B
11
1571
A
Answer C
finished diameter
Answer D
interference fit
all of the above
loss of refrigeration
effect in the space
being cooled
high suction pressure
at the condenser
In a double-effect distilling plant, the brine particles
remaining entrained with the vapor produced in the
evaporator first effect, are separated by __________.
a flash chamber
baffles and vanes
the vapor feed heater a brine pump
How much work would be accomplished if a 15 pound
box were raised to the top of a 25 foot platform?
15 ft-lb
25 ft-lb
40 ft-lb
375 ft-lb
When 'reset' action is added to proportional action
__________.
the proportional
action opposes the
reset action during
decreasing error
transients
the proportional
action opposes the
reset action during
increasing error
transients
the proportional
action assists the
reset action during
decreasing error
transients
the proportional
action and the reset
action are completely
independent of one
another in the
controller operation
The basic function of a steam trap is to __________.
regulate the flow of
steam leaving a
heater
limit the flow of
steam leaving a
heater until it has
given up its latent
heat of condensation
limit the flow of
steam leaving a
heater until it has
given up its latent
heat of fusion
eliminate steam-pipe
water hammer
the suction and
discharge valves
In most pumps and pump motors, over packing the ball moisture
bearings full of grease will result in __________.
emulsification of the
bearing grease
insufficient circulation proper grease
sliding friction
and overheating of
circulation to cool the between balls and
the bearing
bearing
races
The function of port "D" shown in the illustration is to
__________.
provide pressure
sensing from the
compressor
crankcase/ suction
line
prevent pressure
from developing
within the bellows
that would adversely
affect the operation
of the unloader
control
examine the
condition of the
propeller
chip and paint all hull install new docking
protection zincs
plugs in all
cofferdams
When a vessel is in dry-dock, the vessel's engineers
should __________.
109
Illustr
GS-0036
air line reducing
valves
B
11
Answer B
hole tolerance
tools and equipment
served by
compressed air
If a liquid line strainer, such as the one shown in the
slightly warm strainer clicking in the
illustration, becomes clogged to the extent that it should body
solenoid valve
be cleaned, this will be indicated by __________.
A
B
Answer A
the use of internal
threads
act as a pressure
sensing line from the
compressor lube
system to unload all
cylinders if a lube oil
failure occurred
provide a remote
control pneumatic
signal for changing
the control point
operation setting
inspect the hull for
hogging or sagging
RA-0010
RA-0013
Book Num
11
11
11
1572
1573
1574
Ans
D
Question
If you change from a low pour point lubricant to a high
pour point lubricant in a refrigeration system,
__________.
Which of the following statements is correct when
comparing the cylinder diameters of a two-stage
reciprocating air compressor?
Answer A
compressor
lubrication will be
improved
The low pressure
cylinder will be
smaller than the high
pressure cylinder.
Answer B
oil will not leave the
crankcase
Answer C
compressor valves
will be damaged
The high pressure
cylinder will be
smaller than the low
pressure cylinder.
The high and low
The low pressure
pressure cylinders
cylinder will be
will be of equal size. smaller than the high
pressure cylinder but
the piston stroke will
be greater.
Water flow occurs through the unit shown in the
illustration when __________.
"A" is tilted off of its
seat
"C" lifts due to the
decrease in pressure
on top of the
diaphragm
filter the condensed
flash vapors
"E" is moved from
the position shown
horsepower
work
heat
velocity
make the controller
correction
proportional to the
rate at which the
input change takes
place
accelerate the
corrective action so
as to minimize the
possibility of hunting
make the corrective
action of the
controller
proportional to the
deviation of the
controlled variable
from the set point
repeat the
proportional action
until the controlled
variable returns to
the set point
B
D
11
1575
D
11
1576
B
11
1577
D
11
1578
A
11
1579
A
11
1580
A
11
1582
A
11
1583
A
11
1584
C
The demisters installed in a flash-type evaporator serve deaerate the first
to __________.
effect distillate
Mechanical energy in transition is referred to as
__________.
The effect of 'reset', when added to a proportional
controller is to __________.
The basic function of a steam trap includes which of the Regulate the flow of
following processes?
condensate from a
heater.
A ball bearing will overheat if __________.
completely packed
full of grease
Answer D
oil may congeal in
the evaporator
Illustr
all of the above
GS-0155
deaerate the first and remove small water
droplets entrained in
second effect
the flashed vapor
distillate
Regulate the flow of Regulate the flow of
steam from a heater. steam to a heater.
Regulate the flow of
condensate to a
heater.
filled with grease to in use for a long time operated at designed
65% of the total open
high speed
spaces within the
bearing
helium and nitrogen oxygen and
oxygen and
hydrogen
acetylene
thread profile
class of finish
class of fit
The two most common gases used in pneumatic
systems are __________.
The letters 'NPT' used in the notation 1/8-27 NPT as
shown in the illustration, indicates the __________.
compressed air and
nitrogen
thread series
Intake valves installed on most reciprocating low
pressure air compressors are actuated by the pressure
differential between the air in the cylinder and the
pressure __________.
Badly leaking refrigeration compressor discharge valves
will cause __________.
of the air on the
external side of the
valve
of the push rod and sensed by the
sensed by the
rocker arm assembly receiver low pressure intercooler
diaphragm valve
limit switch
overfeeding of the
expansion valve
damage to the
condenser
GS-0010
110
constant running of
the compressor
flooding of the
receiver
Book Num
Ans
Question
In a two-stage flash-type distilling plant, the mesh-type
vapor separators function to __________.
Answer A
improve distillate
purity
Answer B
Answer C
vent noncondensable recycle evaporator
gases
flash steam
Answer D
direct flash steam
into the cooler
10 ft-lb
20 ft-lb
100 ft-lb
1000 ft-lb
Proportional control
Integral control
Derivative control
On-off control
bearing failure
smoother pump
operation
reduced corrosion in increased pump
the bearing
capacity
11
1585
A
11
1586
C
11
1587
A
11
1589
A
What is the gain in potential energy of an object
weighing 10 pounds when it is raised to a height of 10
feet?
The device shown in the illustration is an example of
which of the listed modes of control?
If a ball bearing installed on a pump is completely
packed full of grease, this can result in __________.
11
1590
C
Separators are installed ahead of air line lubricators for
the primary purpose of removing __________.
the heat of
compression
air supply pressure
pulses
moisture in the air
supply
turbulence in the air
supply
In an oxy-acetylene welding outfit, each cylinder has a
regulator and two pressure gages. One pressure gage
indicates cylinder pressure and the other gage is used
to indicate __________.
In the thread notation shown in the illustration, the "1"
preceding '8NC-LH' represents __________.
The outlet steam pressure operating range of the
regulator shown in the illustration is manually adjusted
by the part labeled '________.'
In a refrigeration system equipped with a reciprocating
compressor and a water cooled condensing unit,
leaking compressor discharge valves will result in
__________.
The mesh type steam separators located in a two-stage
flash distilling plant, function to __________.
tip pressure
upstream pressure
hose pressure
arc pressure
a single thread
the thread pitch
L
B
the outside diameter the length of the
threaded section
D
G
Which unit of measurement is used to measure
mechanical potential energy?
The control mode that is generally not used by itself is
__________.
11
1591
C
11
1592
C
11
1593
A
11
1594
D
11
1595
D
11
1596
C
11
1597
C
11
1599
D
Illustr
GS-0146
GS-0038
GS-0045
refrigerant flooding of low suction pressure noisy compressor
the compressor
operation
low head pressure
vent noncondensable recycle evaporator
gases
flash steam
reheat the flash
steam
improve distillate
purity
British thermal units
Horsepower
Foot-pounds
Calories
reset control
integral control
derivative control
two position
differential gap
control
During the operation of a variable capacity refrigeration counter clockwise to clockwise to increase counter clockwise to clockwise to reduce
compressor, the lube oil pressure is observed to be
reduce compressor compressor capacity increase compressor compressor capacity
maximum normal, with the suction pressure just above capacity and thereby and thereby increase capacity and thereby and thereby raise
RA-0013
the cut out point of the low pressure cut out switch,
increase suction
suction pressure
reduce suction
suction pressure
Under this operating condition, "F" can be rotated
pressure
pressure
__________.
111
Book Num
Ans
11
1600
A
11
1601
D
11
1602
B
11
1603
B
11
1604
A
11
1605
B
11
1606
D
11
1607
B
11
1608
A
11
1609
D
11
1611
A
Question
Answer A
A flash type evaporator is designed to operate in 75° F the absolute
sea water, if operated in 50° F sea water, __________. pressures will be
slightly below the
predicted design
absolute pressures
Answer B
Answer C
absolute pressure in the unit will operate
the evaporator
at reduced capacity
stages will be higher
Answer D
thermal efficiency will
decrease, but brine
density will increase
The delivery rate of an axial-piston hydraulic pump is
controlled by varying the position of the __________.
pintle
reaction ring
tilting box or swash
plate
running fit
basic shaft fit
force fit
open the acetylene
cylinder valve only
1/4 to 1/2 turn and
leave the wrench on
the valve stem
A reciprocating refrigeration compressor may be tested rising and falling with increasing with each
each stroke
stroke
for leaking discharge valves by stopping the
compressor, turning the discharge service valve all the
way in, and then turning the compressor over by hand.
If the discharge valves are leaking, the compound gage
will show pressures __________.
a leaking hose must
be repaired by
binding with tape
a flashback of flame
into the hose is
normal
Small droplets of water entrained in the flashed vapor
produced in a flash-type evaporator, are removed by
the __________.
Which of the following terms could be applied to the
simple definition 'the energy of motion'?
Reset control is also referred to as __________.
sliding block
The drawing labeled "A" in the illustration represents
interference fit
a/an __________.
When welding with an oxyacetylene outfit, __________. open the acetylene
valve until the hose
pressure is 26 PSIG
GS-0019
decreasing with each decreasing to a
stroke
vacuum
spray pipes
demisters
condensers
splash baffles
Electrical energy
Thermal energy
Potential energy
Kinetic energy
derivative control
integral control
rate control
proportional control
The device shown in the illustration is typically designed relatively constant
to operate in conjunction with a pneumatically controlled liquid tank levels
valve in order to maintain __________.
steam flow rates
flow rates as a
constant pump-head
square root extractor pressures
During the operation of a variable capacity refrigeration
compressor, the lube oil pressure is observed to be at
its nearly normal minimum pressure, with the suction
pressure indicated at 8 psi. Under this operating
condition, "F" should be rotated __________.
counter clockwise to
increase compressor
capacity and thereby
reduce the suction
pressure
clockwise to increase
compressor capacity
and thereby reduce
the suction pressure
The discharge capacity of the axial piston hydraulic
pump, shown in the illustration, is __________.
fixed by the pump
housing angle
increased by adding decreased by adding increased by adding
a longer cylinder
a longer cylinder
a shorter cylinder
block
block
block
112
Illustr
counter clockwise to
decrease the
compressor capacity
and thereby reduce
suction pressure
GS-0052
clockwise to
decrease
compressor capacity
and thereby raise the RA-0013
suction pressure
GS-0058
Book Num
11
1613
D
11
1614
A
Question
Answer A
Answer B
In order to assure an output near the end of its
the same as the line below the line
compression stroke, the pressure developed in the high discharge pressure discharge pressure
pressure cylinder of a reciprocating air compressor is
__________.
If the discharge valves on a refrigeration compressor
run continuously
not start
are leaking badly, the compressor should __________.
11
1615
B
Referring to Coast Guard Regulations (46 CFR), the
emergency bilge system __________.
has no independent
primary pump
1616
B
11
1617
A
In order to prevent salt water contamination of the
distillate in a flash-type evaporator, it is important to
provide a positive seal around the __________.
Reset control is also referred to as __________.
spray caps
11
11
1619
Ans
D
11
1620
C
11
1623
A
11
1624
C
11
1625
A
11
1626
1627
A
D
have high discharge short cycle on the
pressure
high pressure switch
is independent of the has a cross
main bilge system
connection to the
ballast system
demisters
saltwater heater
vents
is part of the
independent bilge
system
steam supply orifice
plate
proportional speed
floating control
Increasing the speed of a centrifugal pump will result in diameter of the
an increase in its capacity. Another means of increasing discharge piping,
with all other factors
the capacity of a centrifugal pump is to increase the
remaining the same
__________.
derivative control
rate control
proportional control
diameter of the
suction piping, with
all other factors
remaining the same
width of the impeller
only
diameter of the
impeller
The purging of air from an electro-hydraulic steering
gear unit is necessary when __________.
changing over to
engaging the trick
hand pump operation wheel
The piston displacement rate of a reciprocating air
compressor can be modified by changing the
__________.
If a refrigeration system, equipped with a reciprocating
compressor, has a solenoid valve that is leaking during
the 'off' cycle, this could cause __________.
piston speed
the system has been the rudder angle
filled with new oil
indicator does not
match the helm
position
compressor capacity volumetric efficiency total pressure
Coast Guard Regulations (46 CFR) require the
emergency bilge system to __________.
be independent of
the main bilge
system
The pump delivers
full capacity when
started, but gradually
slackens off to an
abnormally low flow.
Excessive air leakage into the suction side of a
centrifugal pump would be indicated by which of the
following operational problems?
11
Answer C
Answer D
constant throughout above the line
the discharge period discharge pressure
low suction pressure high superheat in the noisy compressor
outlet coil
operation upon
starting
A mode of control, whereby the position of the final
reset control
control element is linearly proportional to the rate of
change of the controlled variable, is called __________.
113
refrigerant slugs in
the receiver
be a part of the
independent bilge
system
The pump packing
gland overheats after
short operating
periods.
have an independent have a cross
priming pump
connection to the
ballast system
The motor over
Pounding noises can
current protective
be heard at the pump
device continually
suction chest.
shuts the pump
down.
integral control
two position control
derivative control
Illustr
Book Num
11
1628
A
Question
Referring to the device shown in the illustration, if a
reversed output were desired from a comparable unit as
the system pressure increased, the necessary physical
changes to the unit would be __________.
1629
D
A dented race in an antifriction bearing could be caused water in the bearing
by __________.
abrasives in the
lubricant
dirt in the bearing
11
11
1630
B
While inspecting the steering system at sea, you should air bubbles in the
check for __________.
sight glass
any leaks in the
system
over travel in the
rudder angle
indicator
The pump can only The pump cannot
be used for light oils. handle fluids more
viscous than
lubricating oil.
a leaking hand
an oversized
expansion valve
expansion valve
11
11
1632
1634
Ans
A
C
11
1635
D
11
1636
B
11
11
1637
1638
D
C
Answer A
the offsetting of the
power head, or
motor, and the use of
a reversing lever
Answer B
the sensing or
feedback connection
made from below the
power head or motor
Answer C
the offsetting of the
power head or motor,
and the use of a
reversing diaphragm
Answer D
the exchange of the
pilot valve with one
that would be
downward seating
vibration while the
bearing is not in
operation
lost motion in the
rams
The pump can only
be used for fluids of
high viscosity.
If one box in a multiple box, direct expansion type
refrigeration system was experiencing an excessively
low temperature, this could be a result of __________.
The viscosity of the
fluid is relatively
unimportant in the
pump operation.
liquid refrigerant
returning to the
compressor
When securing an oxyacetylene cutting outfit for an
extended period, you should close the __________.
hand valves on the
torch only
cylinder valves only
cylinder valves and
close torch valves
with 4 to 5 pounds of
pressure in the
hoses
Pump efficiency may be lost as a result of __________. air entering the pump a leak in a gasket on the suction valve in
the suction side of
the wide open
through a pin hole
position
leak in the discharge the pump
manifold
cylinder valves and
close torch valves
when pressure in
hoses and regulators
is zero
the pump being
installed too close to
the suction tank
A mode of control, whereby the speed of motion of the
final control element is linearly proportional to the
deviation of the controlled variable from set point, is
called __________.
A solenoid, direct-acting, three-position, springcentered, directional control valve is used in a hydraulic
system to control a linear actuator. With the actuator
under load there is no movement. However, when the
load is removed the actuator can be cycled in both
directions, although slower than normal. Which of the
listed statements is the probable cause?
rate control
derivative control
two position control
integral control
The pump coupling is
damaged and the
pump is unable to
attain its rated speed
of rotation.
The pump coupling
has sheared and the
motor is
overspeeding.
How does the viscosity of a fluid being pumped affect
the operation of a spur gear pump?
excessive frost on
the cooling coils
One or both of the
One or both of the
centering springs has solenoid coils has
broken and the spool sustained an open.
has jammed in the
valve body.
114
Illustr
GS-0050
Book Num
Ans
11
1639
A
11
1640
A
11
1641
C
11
1642
C
11
1644
A
Question
Answer A
The capacity of a centrifugal pump can be increased by increase speed
the installation of a larger diameter impeller. Another
means of increasing the pump capacity is to
__________.
While inspecting the steering gear at sea, you should
any leaks in the
check for __________.
system
In the illustration, the best way to make the pieces
labeled "B" a locational interference fit is to
__________.
A spur gear pump should be operated with the
slightly opened
discharge valves __________.
Leaking suction valves in a refrigeration compressor are higher than normal
indicated by __________.
suction pressure
In an oxygen acetylene welding outfit, the torch tip
orifice size __________.
11
11
11
1645
1646
1647
B
B
Do nothing, this is
already a locational
interference fit
D
11
1649
C
accuracy of the
rudder angle
indicator
drill the hole 0.010
inches larger to .260
inches
movement of the
trick wheel
position of the sixway valve
turn the shaft down
.004 to .005 inches
heat the shaft until
the nominal diameter
GS-0019
is .250 inches
throttled
fully opened
halfway opened
lower than normal
evaporator
temperature
can be varied by
depends on the hose determines the
length
amount of acetylene rotating the tip
and oxygen fed to
the flames
lower than normal
suction pressure
depends on the
regulator flow rate
Both pumps
operating at the
same speed taking
suction from a
common line.
Each pump operating
at a different speed
and taking suction
from a common line.
Greases are generally produced by __________.
saponifying a metal
base, to which oil is
then added and
mixed under
controlled
temperature
reducing tallow 50° F
below its pour point
then mixing a base
metal, such as
barium, into solution
saponifying an
aluminum base, to
which tallow and oil
are mixed into
solution under a
controlled
temperature
change the
compression of the
spring located below
part "H"
rotate part "E" until
the operating
pressure has
changed by 5 psi
rotate part "D" in the
direction necessary
to produce the
desired output
pressure change in
the system
reducing the
temperature of an oil
below its cloud point
to create the
gelatinous texture
The oil in a cargo winch gear box should be sampled
periodically to __________.
prevent the gear box prevent the oil from
from leaking
becoming
inflammable
115
Illustr
noticeable increase
in compressor noise
Each pump operating
at a different speed
and discharging into
a common line.
In order to change the set point of the system using the rotate part "I"
illustrated device, you must __________.
counterclockwise
1648
Answer D
change the pump to
a 'close coupled'
arrangement
Which of the following conditions would be hazardous if Both pumps
operating at the
you were using two centrifugal pumps to discharge a
flammable liquid?
same speed and
discharging into a
common line.
B
11
Answer B
Answer C
increase the size of reduce wearing ring
the cardent assembly clearances
make sure it has not make sure the motor
become
bearings are
lubricated
contaminated
GS-0050
Book Num
Ans
11
1650
C
11
1651
D
11
1652
D
11
1653
B
11
1654
D
11
1656
D
11
1657
C
11
1659
D
11
1660
A
11
1661
A
11
1662
D
11
1664
Question
When the steering gear is in operation, you should
__________.
Answer A
check hydraulic oil
levels every hour
Answer B
check the rams for
overheating
Answer C
check for excessive
oil leakage from
rams
NC
Answer D
drain water from
telemotor cylinders
each watch
2
What class of screw thread is indicated with a machine
screw described as 1/2-13 NC-2?
The capacity of a rotary pump, delivering a constant
viscosity fluid, will decrease when the discharge
pressure is increased, due to __________.
1/2
13
decreased suction
pressure
increased suction
pressure
reduced slippage
increased slippage
Which of the following forms of energy is usually
associated with the motion of large bodies or objects?
Chemical energy
Kinetic energy
Thermal energy
Electrical energy
A refrigeration system is equipped with a reciprocating
compressor and a water cooled condensing unit. If the
system is overcharged, the resulting high head
pressure will be caused by __________.
the expansion valve
overfeeding the
evaporator
a leaking compressor an incorrectly
suction valve
adjusted high
pressure cutout
If it were necessary for you to frequently replace the
packing on the main condensate pump, the trouble
could be the result of __________.
Which indicator is used to determine the hardness of a
grease?
running at low speed excessive
for a long time
condensate
recirculation
Pour point
Drop point
Winch gears must be maintained in proper alignment to
prevent __________.
If a hydraulic pump is producing a noisy whine when in
operation, the cause may be __________.
overheating of the
lube oil
an air leak in the
pump suction line
above the oil level in
the reservoir
read on a scale
mounted on the
handle of the wrench
When using a deflecting beam torque wrench, the
torque is __________.
The capacity of a gear type rotary pump, when operated discharge volume
at a constant speed, will decrease with an increase in
the pump __________.
An excessive charge of refrigerant in an air-cooled
oil foaming in the
refrigeration system can cause __________.
compressor
C
116
refrigerant flooding
the condenser
defective casing
gasket
worn bearings
Penetration number
Stability-consistency
number
overspeeding of the
motor
low viscosity in the
hydraulic fluid
wear on the braking damage to the teeth
system
an oil leak across the due to the wrong
pump shaft packing direction of rotation
of the hydraulic
motor
read on a dial
indicated by an
indicated by a
mounted on the
audible click
release or break of
handle of the wrench
the handle
suction pressure
torque rating
rotor clearances
higher than normal
suction and
discharge pressures
with a higher box
temperature
higher than normal
discharge pressure
with a normal box
temperature
the compressor to
run continuously
Illustr
Book Num
11
1665
Ans
D
11
1666
B
11
1669
B
11
1670
A
11
1671
D
11
1672
B
11
1674
A
11
1676
A
11
1677
A
11
1678
C
11
1679
D
11
1680
D
Question
Answer A
With reference to the oxyacetylene welding of high
oxidizing flame
carbon steels, hard-facing, and the welding of
nonferrous alloys, such as Monel, the best flame to use
is termed a/an __________.
Excessive wear on a centrifugal pump shaft sleeve will cause severe
__________.
vibration when the
pump is operating
Answer B
neutral flame
Answer C
nitriding fusion
cause excessive
leakage past the
packing gland
cause damage in the allow interstage
stuffing box
leakage in the pump
casing glands
Who is responsible for completing the Muster List
Chief Engineer
Master
("Station Bill") or muster list and posting it in a visible
area aboard the vessel?
Inspection of a low pressure gear pump for cavitation
along the inlet side of along the discharge
will usually be indicated by a wear pattern __________. the housing
side of the housing
Answer D
carburizing flame
U. S. Coast Guard
None of the above
at the extreme upper
and lower
peripheries of the
housing
even throughout the
entire periphery of
the housing when
matched machined
gear sets are used
When renewing sections of pipe in a hydraulic system,
the nominal pipe size of the piping always indicates the
__________.
The output volume of a positive fixed displacement
pump can be changed only by __________.
Which of the conditions listed may be an indication of
an excessive amount of refrigerant circulating through
the system?
Excessive wear on a centrifugal pump shaft sleeve will
__________.
actual inside
diameter
actual outside
diameter
wall thickness
size for threaded
connections
changing the angle
of the tilting plate
Sweating of the
compressor
crankcase
cause new packing
to be torn and scored
changing the speed
of the pump
Colder than normal
solenoid valve
moving the slide
block and rotor
Frosting of the
evaporator
moving the shaft
trunnion block
Weeping of the
purge valve
The mode of control employed by a typical bilge alarm
circuit is a __________.
If a leak occurs between the areas labeled "B" and "J"
of the control valve shown in the illustration, which of
the following problems is most likely to occur?
two position control
cause severe pump
vibration at operating
speed
single speed floating
control
The valve will close
with a decrease in
temperature below
the set point of the
liquid being cooled.
damage the packing damage the pump
gland stuffing box
casing interstage
seals
proportional speed
reset control
floating control
The valve will open The valve will close
with an increase in
with an increase in
temperature above
temperature above
the set point of the
the set point of the
liquid being heated. liquid being cooled.
If you are given the job of adding hydraulic fluid to a
add fluid that is the
mooring winch, and are not certain as to the type of fluid same color as the
to use, you should __________.
fluid in the reservoir
add turbine oil
because it is always
a good substitute
add any oil that has check the winch
the same viscosity as manufacturer's
the hydraulic fluid
instruction book
A gradual decrease in the discharge pressure of an
operating hydraulic pump can be caused by
__________.
the bleeder valve
sticking in the open
position
cold hydraulic fluid
The valve will open
with a decrease in
temperature below
the set point of the
liquid being heated.
the four-way control
valve failing to shift
117
a clogged air vent
filter on the oil
reservoir
Illustr
GS-0043
Book Num
Ans
11
1682
D
11
1683
B
11
1684
C
11
1685
D
11
1686
D
11
1687
A
11
1689
B
11
1690
B
11
1691
C
11
1693
C
11
1695
A
Question
The Bourdon tube-type pressure gage will begin to
straighten out when pressure is applied due to the
__________.
The rate of heat transfer from a hot region to a cold
region is affected most by the __________.
Answer A
applied pressure
being the greatest on
the outer
circumference
size of the heat sink
Which of the conditions listed is one indication of an
Safety valve lifting
excessive amount of refrigerant in the system?
When replacing a steam pressure reducing valve, what Maximum and
information is required for the selection?
minimum inlet
pressures
Answer B
applied pressure
being the greatest on
the inner
circumference
temperature
difference between
the regions
Prolonged running
Answer C
Answer D
Illustr
total force being the total force being the
greatest on the inner greatest on the outer
GS-0114
circumference
circumference
size of the heat
source
total heat of the
system
Short cycling
Oil absorbed in the
crankcase
All of the above
Reduced pressure or Maximum and
pressure range
minimum continuous
flow rates (lbs./hr.)
made with a backing made only with the
prior approval of the
strip to ensure full
penetration
local Officer in
Charge, Marine
Inspection (OCMI)
According to Coast Guard Regulations (46 CFR), a
welded repair to be made to a ships service air receiver,
other than an emergency repair at sea, must be
__________.
inspected and tested
by the chief engineer
before it may be
returned to service
completed and then
tested at least twice
prior to notifying the
Coast Guard to ask
for a marine
inspector
The meat box temperature control circuit, as used in the
ship service refrigeration system, is an example of
__________.
Who is responsible for ensuring that someone is
assigned to close the watertight doors in an
emergency?
If the pump in a hydraulic system produces a low
rumbling noise while in operation, this is a probable
indication of __________.
A three-way solenoid operated dump valve installed on
a flash-type evaporator unit, will divert impure distillate
to the bilge __________.
two position control
single speed floating proportional control
control
reset control
Coast Guard
Master of the vessel Chief Engineer
Chief Mate
internal system fluid
leakage
air passing through
the pump
excess internal
slippage
only if the cell
selector switch is
positioned to monitor
the first stage
distillate outlet
only if the cell
regardless of the cell only if power to the
selector switch is
selector switch
salinity panel is
positioned to monitor position
interrupted
the final stage
distillate outlet
strained hydraulic
fluid
Which of the following statements is correct concerning Heat is given off from
heat transfer?
a high temperature
region known as a
heat sink.
Heat transfer rate is
affected most by the
size of the heat sink
involved.
Heat transfer rate is
affected most by the
temperature
difference between
the heat source and
the heat sink.
Heat transfer by
radiation will occur
only by mass motion
of a fluid substance.
On tank vessels equipped with power operated cargo
hydraulic
tank valves, the type of power actuator most commonly
used is __________.
electric
steam
diesel
118
Book Num
Ans
11
1696
A
11
1697
D
Question
Excessive wear on the packing rings nearest the pump
packing gland, while the rings nearest the impeller
remain in good condition, is caused by __________.
Answer A
failure to insert and
individually seat the
rings, one ring at a
time
An electrical input
Answer B
Answer C
insufficient tightening failure to tighten the
of the packing gland packing gland in a
single adjustment
Answer D
cutting the rings
nearest the gland too
short
A bourdon tube
A reset button
A calibrated scale
lift the valve disk as
the controlled
temperature
increases
lower the valve disk
as the controlled
temperature
decreases
balance the steam
supply pressure and
cancel its affect on
the valve disk
Leakage of hydraulic fluid from around the shaft of a
hydraulic motor may be caused by __________.
In a flash-type evaporator, an electrical salinity cell
would be installed in the __________.
permanent loss of
pump suction
distillate outlet from
the distillate cooler
worn shaft seals
If the viscosity of the liquid being transferred remains
constant as the discharge pressure increases, the
rotary pump __________.
When metal is tempered, it becomes __________.
capacity will increase capacity will
decrease
act as an
accumulator for the
steam if a sudden
increase in steam
supply is required
high level in the oil
sump
condensate drains
from the distiller
feedwater heater
suction pressure will
increase
harder
corrosion resistant
less brittle
more brittle
a restricted suction
strainer
due to short cycling
of the compressor
Which of the following elements is common to all
indicating instruments?
With regards to the device shown in the illustration, the
parts labeled "D" and "I" function together to
__________.
11
1698
D
11
1700
B
11
1701
D
11
1702
B
11
1703
C
11
1704
C
If the suction pressure at the refrigeration compressor is refrigerant
below normal, the cause can be __________.
overcharge
overfeeding by the
expansion valve
11
1706
D
Coast Guard Regulations (46 CFR) prohibit air
compressors from being located in __________.
11
1707
B
a space in which
an enclosed space
cargo hose is stowed containing cargo
piping
Proportional
Reset
Rate
"A" must be rotated
counterclockwise
"A" must be rotated
clockwise
"K" must be rotated
counterclockwise
The lifting capacity of
the crane will be
immediately reduced
by 70%.
Tube nest drain
pump discharge
The pump capacity
will be increased.
The sheathing on the The internal parts of
hydraulic lines will
the pump and
fracture.
hydraulic motor will
wear excessively.
Air ejector
All of the above
condensate drain
Pump efficiency will Internal liquid
be increased.
slippage will be
reduced.
11
1708
B
11
1710
D
11
1711
D
11
1712
A
a space within three
meters of a cargo
valve
Two position
'Offset' is an inherent characteristic of which of the
following types of control modes?
In order to increase the set point of the control valve as "K" must be rotated
illustrated, used to regulate the output temperature of a clockwise
hot water heater, the part labeled __________.
If dirt is allowed to contaminate the sump of a hydraulic All the seals in the
deck crane, which of the following problems will occur? hydraulic lines will
immediately blow
out.
Where would a salinity cell be installed in a doubleDistillate pump
effect distilling plant?
discharge
Which of the listed conditions will occur if the discharge The pump capacity
pressure of a rotary pump is increased from the
will be decreased.
designed 50 psi to 300 psi, while maintaining the same
RPM?
119
distillate inlet to the
distillate cooler
Illustr
GS-0043
low motor RPM
all of the above
suction pressure will
decrease
all of the above
GS-0043
Book Num
Ans
11
1713
D
11
1714
C
11
1716
C
11
1717
D
11
1718
B
11
1719
A
11
1721
C
11
1722
B
11
1723
D
11
11
1724
1725
B
B
Question
Reheating a hardened component to a temperature
lower than the hardening temperature and then cooling
it is known as __________.
Answer A
low temperature
hardening
Answer B
case hardening
Answer C
annealing
Answer D
tempering
If the suction pressure for an operating refrigeration
compressor is below normal, the cause may be
__________.
One of the many problems occurring with centrifugal
pump shaft packing is the excessive wear on the rings
nearest the packing gland. If the rings nearest the
impeller remain in good condition during the same
operating period, the wear is most likely caused by
__________.
an excess of liquid
refrigerant
the expansion valve
overfeeding
a fouled compressor the compressor short
suction strainer
cycling
insufficient
lubrication of the
lantern ring
packing rings rotating over tightening the
in the stuffing box
packing in one
adjustment
some rings being cut
too short
Which of the following definitions can be used to define The period of time in The periodic change
between the set point
the term 'offset' as a characteristic of controller action? which the set point
and the control point and the control point.
coincide.
The variable
difference between
the set point and the
control point.
The constant
difference between
the set point and the
control point.
The illustrated control valve would be more suitable for
__________.
temperature control
of a fluid being
cooled
provide the greatest
restraint in the weld
steam flow to the
turbine driving a
pump
ensure all horizontal
weldments are
completed first
When a new section of shell plating is being installed,
the proper weld sequence must be followed to
__________.
In the illustration, the welded neck flange is attached to
the pipe by a __________.
A salinity indicator is used to determine the
__________.
steam flow control to temperature control
the air ejectors
of a fluid being
heated
minimize shrinkage ensure that all
stresses and harmful weldments are down
hand
distortion
double fillet weld only plug and slot weld
cause of salt
contamination
In order to tighten the bolts of a crankpin bearing to the hook spanner
exact tension specified by the engine manufacturer, you
should use a/an __________.
Which of the conditions listed could cause excessively Insufficient flow of
low refrigerant pressure at the compressor suction?
condenser cooling
water.
V-weld over a
backing ring
location of salt water chemical makeup of
contamination
feedwater
U-weld over a
backing ring
level of alkalinity in
condensate
dial wrench
torque wrench
offset box end
The system is low on The solenoid valve to
refrigerant.
the chill box is
'frozen' in the open
position.
principal surveyor of
Oil sprays on to a hot piece of machinery, catches fire
nearest Coast Guard Officer in Charge,
Marine Inspection at the American Bureau
and causes $35,000 damage to your vessel. By law this unit
the first port of arrival of Shipping at the
must be reported to the __________.
next U.S. port
120
Illustr
The high pressure
cutout switch is
inoperative.
U.S. Salvage
Association Survey
at the next U.S. port
GS-0043
GS-0078
Book Num
11
1726
Ans
B
Question
Answer A
Answer B
Answer C
Answer D
Coast Guard Regulations (46 CFR) require safety and 50% of that at which 75% of that at which 110% of that at
125% of that at
the valve is set to
the valve is set to
which the valve is set which the valve is set
relief valves for air service to be provided with a
substantial lifting device, capable of lifting the disk from blow
blow
to blow
to blow
its seat when the pressure in the vessel is __________.
Which of the following definitions best describes
sensitivity as a characteristic of controller action?
11
1727
A
11
1728
B
11
11
1729
1730
D
C
11
1731
D
11
1732
C
11
1733
D
11
1734
D
11
1735
B
11
1736
C
The ratio of the
output in response to
a specified change to
the input which
caused it.
With regards to process control, the operation of the
proportional control
device shown in the illustration can be characterized by only
the term __________.
Sounding tubes and access openings for fuel oil tanks Washrooms
on MODUs are permitted by Coast Guard Regulations
(46 CFR) to be located in which of the listed spaces?
If the relief valve on the discharge side of a hydraulic
pump lifts, the cause could be __________.
The steady state
difference between
the control point and
the value of the
controlled variable
corresponding to the
set point.
The variation of the
manipulated variable
produced by the
mode of control.
The time difference
between the input
change and the
output change of the
controller.
proportional plus
reset control
reset control only
on-off control only
Laundries
crew lounge
a low load on the unit a clogged pump
suction strainer
A welding electrode is marked E-6010, this designation the electrode may be the minimum tensile
strength of the weld
means that __________.
used in the flat
position only
metal will be 70,000
psi
Before power to a lathe is turned on, it is a good shop
the carriage is
the lathe is level
practice to first hand feed the carriage to ensure
lubricated
__________.
Which of the tools listed should be used with the set
Phillips head
Spanner wrench
screw shown as figure "F" in the illustration?
screwdriver
In an operating, water-cooled, multi-box refrigeration
overcharge of
fouled shell-and-tube
system, both low discharge and high suction pressures refrigerant in the
condenser
are being simultaneously experienced. The probable
system
cause for this condition is a/an __________.
Dimension "X" indicated on the architects scale, shown 5 feet 3/4 inch
in the illustration, will be equal to __________.
5 feet 4 inches
Charring or glazing of the inner circumference of the
packing rings in a centrifugal pump, is caused by
__________.
failure to seat the
packing rings
under tightening the
packing
121
Illustr
GS-0045
none of the above
a blockage in the line the hydraulic motor
turning too fast
between the pump
and hydraulic motor
either insulated or
the electrode is to be
uninsulated electrode used for shielded
holders may be used metal arc welding
all locking devices
have been released
the work piece is
secure in the lathe
Crescent wrench
Allen wrench
improper superheat
adjustment on the
low side
discharge relief valve
leaking back to the
suction side
83 feet
93 1/4 feet
GS-0080
GS-0023
insufficient
lubrication of the
packing
packing ring rotation
Book Num
11
1737
Ans
1738
C
11
1739
D
11
1740
B
11
1741
D
11
1742
A
11
1743
A
11
1744
1745
Answer A
the form of the input
and output energies
must be the same
Answer B
Answer C
the ratio of the output the form of the input
to the input must
and output energies
always be greater
must be different
than the numerical
value of 'one'
A grease drop point is __________.
how far a standard
metal cone will
penetrate into the
sample in five
seconds when
dropped
how uniform and
thick the spread of
an ounce of grease
is when dropped
from a height of five
feet
A drill that wobbles while the drill press is in operation
may __________.
be bent
have a severely worn have been placed in all the above
shank
the chuck off center
Setting the relief valve opening pressure in a hydraulic
system lower than the required operating pressure will
result in __________.
The high strength structural steel, such as Grade DH
32, when used as part of the main deck plating, is noted
on the vessel's Certificate of Inspection. The information
is important because __________.
accelerated action of
the system
components
the properties of DH
32 steel may
interfere with the
operation of some
cathodic protection
systems
overheating of the
system
overspeeding of the
hydraulic pump
extended system life
the properties of DH
32 steel will affect
the ability to properly
ground electrical
apparatus in the
immediate area
any electrical
equipment mounted
on DH 32 steel
plating is required to
be insulated from the
plating and internally
grounded instead
the welding of any
DH 32 steel requires
special welding
procedures
Which of the devices shown in the illustration should be
used with a bridge gage?
Large size pipe can be easily rotated with a
__________.
If a refrigeration compressor had developed a high
suction pressure, the problem could be a result of
__________.
A
B
C
D
chain pipe wrench
monkey wrench
basin wrench
strong back
If you have to completely grind a new point on a high
speed drill, which of the following could happen if it is
cooled in cold water immediately after grinding?
The edges will be
dulled.
A
11
11
Question
A mandatory characteristic of a pure amplifier is that
__________.
D
C
a minor accumulation a leaking king valve
of air or
noncondensable
gases in the system
122
Answer D
the action must be
either integral or
derivative
Illustr
the temperature that the length of time a
a sample of grease 50 gram sphere will
begins to liquefy
be held in place from
the underside of a
surface coated with
25 millimeters of the
grease sample
a clogged subcooler liquid refrigerant
flooding back from
the cooling coil
The 59° angle will be Cracks may appear
lost due to metal
in the metal.
contraction.
The cutting surface
will become
annealed by the cold
water.
GS-0073
Book Num
Ans
11
1746
B
11
1747
C
11
1749
A
11
1750
D
11
1751
B
11
1752
B
11
1753
B
11
11
11
11
1754
1755
1756
1757
C
A
D
B
Question
According to Coast Guard Regulations, if a pressure
vessel, such as a ships service air tank, has defects
which may impair its safety, the tank shall be
__________.
Answer A
hydrostatically tested
at a pressure equal
to the design
pressure of the tank
Answer B
hydrostatically tested
at a pressure equal
to 1 1/2 times the
maximum allowable
working pressure of
the tank
Answer C
pneumatically tested
at a pressure equal
to the working
pressure of the tank
Answer D
pneumatically tested
at a pressure equal
to 1 1/2 times the
design pressure of
the tank
A pure transducer utilizes __________.
Steam tables can be used to obtain the __________.
integral action
values for properties
of water and steam
vapor at various
conditions
rate action
specific fuel
consumption under
steady steaming
conditions
proportional action
derivative action
steam generating
mechanical efficiency
capacity of a vessel's of the main unit
boilers
The rate of heat transfer between the hot and cold fluids remain constant
passing through a shell-and-tube type heat exchanger along the tube's
will __________.
length
be greatest in a
remain constant
single pass counter throughout the heat
flow heat exchanger exchanger
vary from section to
section throughout
the heat exchanger
Which illustration correctly depicts a double bevel
groove weld?
A tool used for measuring, or laying out angles is called
a __________.
A coolant is usually used when cutting metal in a power
hacksaw to prevent the __________.
If a refrigeration compressor had a higher than normal
suction pressure, the problem could be a result of
__________.
4A
3B
4B
6B
trammel
protractor
micrometer
caliper rule
blade from bending
cut from clogging
leaking compressor
suction valves
a slightly higher than
normal liquid level in
the receiver
A pneumatic pressure tank is installed in a sanitary
system to __________.
reduce excessive
cycling of the
sanitary pump
One of the many troubles occurring with centrifugal
pump shaft packing is the excessive wear on the rings
nearest the packing gland, while the rings nearest the
impeller remain in good condition. This wear may be
caused by __________.
air entrained in the
fluid pumped
While calibrating a bourdon tube pressure gage, all
readings are found to be 10 pounds higher throughout
its entire range. An adjustment should be made by
__________.
increasing the sector resetting the pointer
to pivot point length on its shaft
heat of friction
blade from
overheating
a minor accumulation a constant loss of
refrigerant
of air or
noncondensable
gases in the system
123
prevent the sanitary
pump from losing
suction
provide a higher
pressure in the
system then the
pump can deliver
packing rings rotating some packing rings
in the stuffing box
being cut too short
decreasing the
sector to pivot point
length
increase water flow
through the system
improper adjustment
of the gland nuts
increase the set
screw length
Illustr
GS-0077
Book Num
Ans
11
1758
A
11
1759
C
11
1760
C
11
1761
C
11
1762
C
11
1763
B
11
1764
B
11
1765
A
Question
Return lines to hydraulic systems reservoirs should
__________.
Answer A
Answer B
end the return line as end the return line as
far as practicable
close to the pump
from the pump
suction as possible
suction
Answer C
provide a "P" or "S"
trap in the return line
as close to the
reservoir as possible
to trap sediment from
entering the tank
Answer D
connect the return
lines directly to the
cleanout and
inspection plates to
limit the number of
openings on the
reservoir
How often must a U.S. Coast Guard engineering license
be renewed?
The temperature differential occurring between the inlet
temperature of the fluid to be cooled and the outlet
temperature of the cooling medium in a shell-and-tube
heat exchanger is greatest in which of the flow designs
listed?
The designation E7028-A1 is typically located on an arc
welding electrode. Which of the listed letters and/or
digits correctly identifies the welding position for which
the electrode is recommended?
The center head of a combination square set is used to
__________.
A pipe or Stillson wrench should only be used on
__________.
High suction pressure to a refrigeration system
compressor is caused by __________.
Annually
Every 3 years
Every 5 years
Every 10 years
Cross
Counter
Parallel
Circular
E
70
2
A1
check degrees of
angle
hexagonal objects
find right angles
locate the center on
round stock
square objects
check the angle of
thread cutting tools
flat objects
the expansion valve
is insufficiently
opened
the expansion valve the king valve is
being open too wide insufficiently open
a dirty dehydrator
Which material can be drilled at the highest speed?
Aluminum
Medium cast iron
Copper
High carbon steel
Hydraulic
accumulators
Air receivers with no Bulk storage tanks
manholes or other
for refrigerated
inspection openings liquefied CO2
Which of the pressure vessels listed is required under
Tubular heat
Coast Guard Regulations (46 CFR) to be hydrostatically exchangers
tested once every three year period?
11
1766
C
11
1770
C
The general purpose of a heat exchanger is to
__________.
11
1771
C
To ensure a good weld, post heating is required
whenever an arc weld repair is made __________.
11
1772
A
11
1773
A
To get an accurate measurement using a 12 inch
machinist's steel rule, you should measure
__________.
A pipe, or Stillson wrench functions best when
__________.
round objects
eliminate hot air from maintain steady
heat, or cool one
the condenser
pressure in a system fluid by means of
another fluid
with a straight
with a reverse
to a cast component
polarity rod
polarity rod
(casting)
reduce the engine
room temperature in
tropical climates
to a part of the ship's
main structure
from the one inch
graduation mark
from the zero end on on the narrow edge
the scale
of the rule
on the unmarked
edge of the rule
the bite is taken
midway up the jaw
teeth
the wrench jaws are
at the widest open
setting
an extension is
placed on the wrench
handle
124
a maximum pull is
exerted with one
hand
Illustr
Book Num
Ans
11
1774
D
11
1775
D
11
1776
C
11
1777
A
11
1778
A
11
1779
A
11
1780
D
11
1781
A
11
1782
A
11
1783
B
11
1784
D
Question
Which of the following problems could cause the high
pressure cutout switch to shut down the compressor in
a refrigeration system?
Which of the following procedures is used to bring a
hole to finished size with high accuracy?
A crackling noise coming from a centrifugal pump
casing is an indication of __________.
When a bourdon tube pressure gage is tested and
found to be inaccurate, adjustment must be made to
obtain the correct readings. The distance between the
pointer spindle and the link connection to the sector
gear will be changed when the __________.
Answer A
A shortage of liquid
refrigerant.
Answer B
Excessive frost on
the evaporator.
Coring
Boring
insufficient packing
an oversized lantern
ring
proportional amount
of pointer travel for
each weight added is
correct, but the total
reading is wrong
excessive suction lift reversed pump
rotation
reading is correct
readings are correct
only at the working
only at the minimum
pressure
and maximum ends
of the scale
A simple hydraulic system is made up of a pump, reliefvalve, manual-control valve, and a linear actuator. If the
piping connected to the actuator 'cap end' is
accidentally crushed to one half of its diameter, this will
result in __________.
The heat required to raise the temperature of a unit
mass of a substance one degree is called its
__________.
Which of the following statements represents a
disadvantage associated with a spool-type, solenoid
direct operating, directional control valves?
slower actuator
retraction speed
faster actuator
retraction speed
faster actuator
extension speed
pointer does not
travel the correct
distance as test
weight is added
Answer C
Answer D
Excessive condenser Insufficient
cooling water.
condenser cooling
water flow.
Broaching
Reaming
all of the above
GS-0107
specific heat capacity latent heat
entropy
adiabatic heat
Back pressure on the
outlet line must be
steady to drain the
lower spool chamber.
The valve sealing
surface is often
damaged through
excessive throttling
action.
The spool does not
have hydro cushion
capabilities to handle
shock.
Close fitting spools
occasionally stick
due to the
accumulation of
hydraulic oil
residues.
The welding symbol reference line using the inverted
"V", indicates __________.
a "V" groove weld is
to be made
The tool shown in the illustration is called a
__________.
Needle nosed pliers are best used to __________.
center gage
the arrow side of the
weld is to be surface
finished
thread gage
the opposite side of
the weld is to be
surface finished
crotch center
the first pass of the
weld is to be back
gouged
drill gage
cut recessed cotter
pins
tighten electrical wire
clamps
system relief valve
would open
high pressure cutout
switch would function
If the water failure switch should fail to shut down the
refrigeration compressor, the refrigerant pressure will
build up in the high pressure side of the system to the
point where the __________.
Illustr
strip insulation from grasp items
electric wire or cable positioned in tight
places
compressor
condenser tubes
discharge valves
would rupture
would be damaged
125
GS-0076
GS-0072
Book Num
Ans
11
1785
C
11
1786
B
11
11
11
1787
1788
1789
B
B
1790
B
11
1792
B
1794
Answer B
Flat nonparallel
surfaces
Answer C
Answer D
Flat inflexible parallel All of the above
surfaces
surfaces will sustain
a hydrodynamic film
while in motion under
a load
If you heard a 'crackling' noise in a centrifugal pump,
the most probable cause of the problem would be
__________.
A proportional band, or range adjustment of a bourdon
tube pressure gage is accomplished by __________.
insufficient speed
cavitation
excess discharge
pressure
adjusting the
effective moment
arm length between
the bourdon tube and
the quadrant gear
fulcrum
adjusting the pointer changing out the
position relative to
pointer pinion
the shaft on which it
is mounted
An electric motor driven (torque producing) remotely
controlled, valve actuator is installed on the high sea
suction with the 'red' indicator light illuminated. When
the 'open' push button is depressed, the 'green'
indicator light comes on momentarily and then goes out,
without any appreciable movement of the valve. Which
of the following actions should be carried out?
Alternately depress
the 'close' and 'open'
buttons to get the
valve open.
Manually engage the
actuator handwheel
and 'break' the valve
disk from its seat,
then push the 'open'
button.
The unlicensed crew requirements listed on the
Certificate of Inspection reads as follows: 3
firemen/watertenders; 3 oilers. The vessel is about to
depart on a foreign voyage, and has in the crew: 3
firemen/watertenders, 2 oilers, and one man, whose
Which of the following problems will occur if the internal
drain at either end of a hydraulic, two-way, spool-type
directional control valve cylinder were to become
plugged?
Which of the devices listed can be used to measure any
angle on a blueprint or drawing?
An increasing head pressure in a refrigeration system,
without any corresponding change in the cooling water
inlet temperature, would probably be caused by
__________.
A
11
11
Question
Answer A
Which of the following surfaces will not develop a
Curved surfaces
hydrodynamic film where motion is accompanied by any
appreciable loading?
B
excessive net
positive suction head
flattening the crosssection of the
bourdon tube
Secure power, tag
out system and make
repairs because the
valve stem has
sheared.
Secure the breaker
to this device, then
switch the motor
leads and push the
'open' button.
call the port captain sail because your
and request another crew requirements
are filled
oiler
request a waiver
from the Coast
Guard
check if any of the
firemen have enough
time for an oiler's
endorsement
The reservoir would
become vapor
bound.
The valve would be
placed in hydraulic
lock.
The spring loaded
relief ports would
open.
The buffering
chambers would be
unable to function.
Vernier
Protractor
Planimeter
Compass
restriction in
refrigerant piping
air and
noncondensable
gases in the
condenser
water in the
refrigerant
flooding back of
liquid refrigerant from
the evaporator
126
Illustr
Book Num
11
11
1795
1797
Ans
A
1798
B
11
1799
C
11
1802
1803
Answer B
control action to be
accomplished by a
relatively small
amount of
downstream low
pressure steam
Answer C
complete closing of
the main valve when
pressure
adjustments are
made
The zero set point adjustment of a bourdon tube
pressure gage is accomplished by __________.
adjusting the pointer
position relative to
the shaft on which it
is mounted
adjusting the pointer flattening the cross
position by bending section of the
the free end of the
bourdon tube
pointer
Which of the conditions listed will cause the hydraulic
Bleeding the gas
pump relief valve to remain open during the operation of charge from the
the system?
accumulator.
Reducing the relief
valve spring
compression.
How many BTU's must be added to one pound of water 16 BTU's
at 32° F to raise the temperature to 212° F?
When the axis of the pinion gear is parallel to the center hypoid type
of the bevel gear, similar to right angle drive gear shown
in the illustration the drive is identified as __________.
144 BTU's
Opening the
Removing the
restrictor valve check- restrictor valve
valve spring.
variable orifice by
one third of a turn.
180 BTU's
970 BTU's
spiral bevel type
zerol type
B
11
11
Question
Answer A
In the illustration shown, the operating piston "H" in the control action to be
valve has a larger surface area than the main valve disc accomplished with a
to allow __________.
relatively small
amount of high
pressure steam
B
B
11
1804
A
11
1805
C
11
1806
D
11
1807
D
adjusting the
effective moment
arm length between
the bourdon tube and
the quadrant gear
fulcrum
If you were uncertain as to what type of gasket material turn the old gasket
to install in a pipeline, you should __________.
over and install it
again
check the ship's
plans or
manufacturer's
instructions
leaking discharge
valves
leave the old gasket
in and cover it with
Permatex
leaking suction
valves
Answer D
Illustr
free movement of the
auxiliary valve "B"
during a change in
GS-0044
operating pressure
straight-tooth bevel
type
make up the joint
without a gasket until
you can check with
the chief
liquid refrigerant
flooding back from
the cooling coil
If the refrigeration compressor was developing higher
than normal discharge pressure, this could be a result
of __________.
air or
noncondensable
gases in the system
The tail shaft of an ocean going vessel is usually
supported by the __________.
Frequent bearing replacement in a centrifugal pump,
due to rapid bearing wear, can be a result of
__________.
Which of the following control modes is generally not
used by itself?
spring bearings
tail bearings
stern tube bearings
propeller bearings
leakage through the
pump stuffing box
gland
Two position action
high net positive
suction head
long periods of
cavitation
misalignment
Proportional action
Integral action
Derivative action
127
GS-0106
GS-0128
Book Num
11
11
1808
1809
Ans
D
1810
D
11
1811
D
11
1812
C
1813
Answer A
The pump discharge
pressure will remain
at the same pressure
prior to the relief
valve being repaired.
Answer B
The solenoid
controlled, threeposition, spring
centered control
valve response will
be quicker.
Answer C
Answer D
The fluid viscosity will The movement of
increase during
any system actuator
operation.
will now be slower.
A drop test is carried out on a sample of grease by
__________.
allowing a
suspended cone to
drop into a sample of
grease for five
seconds and
determining the
depth of penetration
dropping a one
ounce grease
sample from one
meter, and observing
the resulting spread
pattern, uniformity of
thickness, and
consistency of
texture
allowing a sample of
grease to drop into a
cup at ambient
temperature and
determining the time
necessary for this to
occur
Cavitation in a hydraulic pump is indicated by noisy
pump operation and can be caused by a/an
__________.
high fluid level in the hydraulic fluid low
reservoir
floc point
excessive discharge clogged suction
strainer in the
pressure from the
pump
reservoir
When welding mild steel with a shielded metal-arc
electrode, and getting only shallow penetration, you
should __________.
The three basic parts of any eductor are the nozzle, the
suction chamber, and the __________.
Which of the following statements is true concerning the
hydrodynamic wedge developed by lubricating oil?
use a lower current
speed up your
electrode travel
use larger electrodes increase the
amperage
injector
compressor
diffuser
siphon
The wedge-shaped
oil film's load carrying
capacity is
determined by its
length and thickness.
The load carrying
capacity is inversely
proportional to the
velocity of the fluid.
Pressures
throughout the oil
wedge are uniform.
The load carrying
capacity is directly
proportional to the
thickness of the oil
film.
If the head pressure of a reciprocating refrigeration
compressor is excessive, __________.
the relief valve
should open before
the high pressure
cutout
the relief valve
should open and
allow the excess
refrigerant to flow to
the receiver
electrolysis
the high pressure
you should close in
cutout switch should on the suction valve
operate before the
relief valve opens
abrasion
corrosion
neutral zone action
range
on-off action
D
11
11
Question
During the repair and overhaul of the pump relief valve,
used in a hydraulic system, the set point was reduced
by 100 psi. Which of the following statements describes
the result of the set point being lowered?
A
11
1814
C
11
1816
A
11
1817
D
Pitting in the suction areas of a centrifugal pump bronze cavitation
impeller is usually caused by __________.
The control mode in which the final control element is
dead band action
moved from one of two fixed positions to the other is
known as __________.
128
determining the
temperature at which
a grease sample
liquefies when
heated and drops
from a cup through a
bottom orifice
Illustr
Book Num
11
1818
Ans
C
11
1819
D
11
1821
C
11
1822
B
11
1823
D
11
1824
A
11
1825
B
11
1826
A
11
1827
C
11
1828
D
11
1830
C
11
1831
A
11
1832
A
Question
Radial thrust developed in high pressure centrifugal
pumps can be eliminated by the use of __________.
Answer A
single volutes
Answer B
a single diffusion
nozzle
A 'Report of Marine Accident, Injury or Death', Coast
Guard form 2692, must be filed with the Officer in
Charge, Marine Inspection when a shipboard casualty
results in __________.
The welding process using an electric arc developed
between a flux covered electrode and the metal being
welded is known as __________.
Devices which utilize the rapid flow of a fluid to entrain
another fluid and thereby move it from one place to
another are called __________.
Which of the following statements indicates compliance
with Coast Guard Regulations (46 CFR Part 56)
concerning a vessel's bilge system?
the incapacitation of
an injured crewman
the death of a yard or the incapacitation of All of the above.
harbor worker in the a yard worker due to
engine room
a boiler flareback
flux cored arc
welding
resistance spot
welding
shielded metal arc
welding
submerged arc
welding
mixed flow pumps
jet pumps
volute pumps
centrifugal pumps
All bilge manifold
suctions shall be
capable of being
locally controlled
from above the floor
plates.
The system must be
capable of operation
under all practicable
conditions after a
casualty, whether the
vessel is upright or
listed.
All of the above.
Peak tanks, chain
lockers, and decks
over peak tanks may
be drained by
eductors, ejectors, or
hand pumps.
One cause of high head pressure occurring in a
refrigeration system can be __________.
insufficient cooling
water flow to the
condenser
hidden line
a low refrigerant
the liquid valve is
charge in the system open too much
high evaporator
superheat
In the illustration, line "J" is used to depict a
_________?
The usual symptoms of cavitation in a centrifugal pump crackling noise and
is __________.
vibration
cutting plane line
outline
centerline
an increase in
discharge pressure
an increase in
suction pressure
lifting of the relief
valve
A control action which produces a corrective signal
relative to the speed at which the controlled variable is
changing is known as __________.
The diffusion ring installed in many high pressure
centrifugal pumps, such as feed pumps, __________.
reset action
integral action
derivative action
proportional action
eliminates axial
thrust
alleviates the need
for a double suction
impeller
eliminates radial
thrust to the impeller
Air trapped in the hydraulic fluid of a steering system
may be indicated by __________.
the steering pumps
overspeeding
imparts kinetic
energy to the water
passing through the
pump
a jammed open relief
valve
excessive ram
pressure
Setting up a welding job, where the work is the positive
pole and the electrode is the negative pole for the arc,
is known as a/an __________.
The steam supplied to operate a steam driven
reciprocating pump is usually obtained from the
__________.
straight polarity
welding circuit
inert-arc welding
circuit
a constantly
occurring improper
rudder response
shielded-arc welding
circuit
desuperheated
steam line via a
reducing station
auxiliary exhaust line main steam line via a contaminated steam
reducing station
generator
129
Answer C
a diffusion ring
Answer D
a modified Kingsbury
thrust bearing
reverse polarity
welding circuit
Illustr
GS-0006
Book Num
Ans
11
1833
C
11
1834
C
11
1836
A
11
11
1837
1838
A
D
Question
Answer A
Which of the following statements concerning the
Reducing station
operation of steam pressure reducing valves is correct? relief valves must be
lifted by hand at least
once a watch.
Answer B
The cut out valve at
the outlet of the
reducing valve
should be throttled
when in operation.
Suction gas heat
exchanger bypassed.
Which of the problems listed would cause the discharge
temperature of an R-12 refrigeration compressor to
increase?
If it were necessary for you to frequently replace the
bearings of the condensate pump, the trouble could be
the result of __________.
A control action which produces a corrective signal
relative to the length of time the controlled variable has
been away from the set point, is known as __________.
Thermal expansion
valve frozen open.
With regards to pilot controlled pneumatic regulating
valves, the spring force of the regulating valve should
be adjusted to __________.
maintain the required maintain the value of maintain the output
steam pressure of
system set point
the manipulated
variable
the system
The insert plate
The lines of new
should cover at least welding should,
one full frame space. where possible, lie in
existing lines of
welding.
compression set or low fluid pressure
wear
misalignment
integral action
11
1839
A
11
1840
A
An O-ring seal in a hydraulic system will begin to leak
when it has lost its interference fit due to __________.
1841
C
When arc welding, the flux that covers the electrode is
used to __________.
control penetration
11
11
1842
D
11
1843
B
allow it to be used as prevent the shank
a pry bar
from bending
Tool steel
Cast iron
11
1844
B
Some heavy duty screwdrivers are made with a square
shank to __________.
When drilling holes in metal, which of the materials
listed does not have to be lubricated?
Low compressor head pressure in a refrigeration
system can be caused by __________.
11
1845
1847
C
B
insufficient
condenser cooling
water
The device used to retain the packing, that keeps water packing nut
from entering the ship through the opening where the
propeller shaft passes through the hull, is called a
__________.
The control mode where the position of the final control two position control
element has a linear relationship with the position or
value of the controlled variable, is known as
__________.
130
Answer D
Reducing valves are
absolutely reliable
and require no
routine maintenance.
Illustr
High pressure cutout
switch inoperative.
a plugged water seal salt water
worn wearing rings
line
contamination of the
condensate
proportional action
rate action
derivative action
When renewing only a portion of an entire hull plate
with an insert plate, which of the listed guidelines
should be followed?
11
Answer C
Reducing valves
should be warmedup and drained
before they are
adjusted.
Condenser clogged
or fouled.
the operating range
of the pilot output
loading pressure
The insert plate
The corners of the
insert plate should be should be at least
square.
9/16 thick.
high fluid flow
reduce metal fatigue reduce oxidation
and warpage
low fluid temperature
increase heat
transfer
permit striking with a allow turning with a
hammer
wrench
Mild steel
Cast steel
excessive condenser air in the refrigeration excessive refrigerant
cooling water
system
in the system
hawsepipe
stuffing box
seal cage
proportion control
reset control
rate control
GS-0051
Book Num
11
1848
Ans
B
11
1849
C
11
1850
D
11
1851
A
11
1852
D
11
1853
B
11
1854
C
11
1855
D
11
1856
A
11
1857
C
11
1858
D
11
1859
D
Question
One function of a replenishing pump installed in many
pressure-closed hydraulic systems, is to supply fluid
flow to __________.
Answer A
the reservoir
Answer B
Answer C
a servo control circuit position a manually
controlled valve
Answer D
the main system
accumulators under
all operating
conditions
obtaining a valid
Certification of
Inspection from the
Coast Guard
Triple screw rotary
pump with end
suction
The duties of a chief engineer upon taking charge of the preparing a list of
department include __________.
engine department
personnel for the
Master's signature
What type of pump is shown in the illustration?
Double screw rotary
pump with suction at
the center for
hydraulic balance
taking a complete
personal inventory of
all engine room
spare parts
Triple screw rotary
pump with suction at
the center for
hydraulic balance
determining if any
vital engine room
equipment is
inoperative
Double screw rotary
pump with end
suction
Coast Guard regulations for small passenger vessels of
less than 100 gross tons require dry-docking or hauling
out at intervals not to exceed 18 months if operated in
__________.
saltwater a total of
more than 9 months
in the 18 month
period since it was
last dry-docked or
hauled out
fresh water a total of
more than 9 months
in the 18 month
period since it was
last dry-docked or
hauled out
saltwater a total of
more than 6 months
in the 18 month
period since it was
last dry-docked or
hauled out
The illustrated system is used as a/an __________.
bilge water
conditioner
6 months in fresh
water and 6 months
in salt water
sludge processor
oily-water conditioner oily-water separator
exclusively in fresh
water
in saltwater a total of in saltwater 6 months
or less within each
9 months in the 18
months since last dry- 12 months period
dock period
since dry-docking
A low refrigeration compressor discharge pressure can
be caused by __________.
An offset screwdriver is best used for __________.
warm food in the
refrigerator
tightening Allen head
screws only
wasted zinc plates in
the condenser
tightening or
loosening 'offset
type' machine screws
leaky compressor
discharge valves
driving self-tapping
screws only
faulty door gaskets
on the refrigerator
screws you cannot
reach with a straight
shaft screwdriver
If the shaft packing for a centrifugal pump requires
replacement more frequently than normal, a possible
cause may be __________.
The ratio of output response to a specified change in
the input is known as __________.
To prevent air pockets from forming in a centrifugal
pump suction line installed angled from normal, any
gate valve should be installed with the __________.
worn bearings
worn mechanical
seals
a flooded pump
suction
wrong direction of
pump rotation
primary feedback
deviation
sensitivity
dead band
The bleeder plug, or docking plug located on a motor
vessel double bottom tank is used to __________.
indicate when the
tank is pressed up
Small passenger vessels of less than 100 gross tons
shall be dry-docked or hauled out at intervals not to
exceed 60 months if it operates __________.
GS-0144
saltwater
continuously for 18
months
bonnet above suction centerline above the stem pointing upward stem horizontal or
pipe centerline
suction pipe
at right angles to the pointing downward
centerline
pipe
below the pipe
131
Illustr
provide a secondary vent air from the tank empty the tank when
means of tank
when bunkering
in dry-dock
sounding
GS-0113
Book Num
11
1860
Ans
D
Question
Answer A
Answer B
The blade for a power hacksaw should be installed with pointing either
pointing away from
the teeth __________.
toward or away from the motor end of the
the motor end of the machine
machine
Answer C
Answer D
pointing toward the pointing toward the
motor if using a 4 or motor end of the
6 tooth blade and
machine
away from the motor
if using a 10 or 14
tooth blade
Which of the following statements is correct concerning First, weld the joints
welding sequences?
that will tend to
contract the most.
Make a weld across
an unwelded plate
joint in adjoining
members.
11
1861
A
11
1862
D
11
1863
A
11
1864
C
11
1866
C
11
1867
D
11
1868
D
11
1869
D
11
1871
D
11
1872
A
11
1873
C
First, weld
attachments which
will restrain points of
maximum
contraction.
Which of the listed types of steam end piston rod
Reinforced rubber
Wire impregnated
packing should be used in a steam reciprocating pump? packing
high temperature
packing
slightly larger than
equal to at least 1/2
When drilling holes larger than 1/2 inch, drilling a
smaller hole first is a good practice. This is called a pilot the web thickness of the diameter of the
larger drill
the larger drill
hole, and the pilot drill should have a diameter
__________.
A pressure drop through the refrigerant liquid line may solenoid valve to
compressor to hunt
cause __________.
seize
Low pressure
braided asbestos
packing
smaller than the
dead center of chisel
edge of the larger
drill
formation of flash
gas in the liquid line
Each successive
welded part should
be restrained to lock
in stresses and avoid
cracking.
High pressure
graphite packing
small enough to
ensure the maximum
cut by the larger drill
expansion valve to
freeze open
Heavy wear in a particular area of the inner
circumference of a packing ring may be caused by
__________.
The steady state difference between the control point
and the value of the controlled variable, corresponding
with the set point, is known as __________.
a high suction head
rotating rings
badly worn bearings a loose stuffing box
gland
dead band
control point
deviation
With regards to the viscosity of lube oil in an operating
system under normal load, the highest viscosity should
occur __________.
just prior to entering
the lube oil cooler
at the lube oil cooler at the main lube oil
outlet
pump discharge
at the narrowest
point of the
hydrodynamic wedge
A Coast Guard issued engineer's license may be
suspended or revoked for __________.
the violation of a
narcotic drug law
all of the above
Which of the factors listed governs the intensity of heat
required for any given welding job?
The strength of the
bond only.
the commission of an the violation of
act of misconduct
federal water
pollution law
The strength of the
The type of metal
bond and the welding being joined only.
process being used.
Which of the listed pumps is NOT a positive
displacement pump?
In the illustration, the reference to 3/4"R indicates that
the __________.
Centrifugal
Reciprocating
Gear
Rotary
hole has a 3/4"
radius
notch has a 3/4"
width
hole has a 3/4" depth hole has a 3/4"
diameter
132
Illustr
offset
The type of metal
being joined and the
welding process
being used.
GS-0021
Book Num
Ans
11
1874
D
11
1875
B
11
1876
A
11
1877
A
11
1878
A
11
1879
D
11
1880
D
11
1881
D
11
1882
A
11
1883
B
11
1884
C
11
1885
A
11
1886
C
Question
If the thermal bulb of an expansion valve is incorrectly
placed at the center of the coil instead of the end, it will
__________.
A grinding wheel is trued with a __________.
When performing a hydrostatic test on a low pressure
evaporator to determine the source of suspected air
leaks you should use __________.
Answer A
Answer B
Answer C
Answer D
increase the capacity increase the
deliver more
decrease the
of the coil
superheat at the bulb refrigerant to the coil capacity of the coil
lathe tool
fresh water at or
above the ambient
temperature
dressing tool
circulated cold fresh
water, while
maintaining all
normal unit operating
pressures
The quantity or condition which is measured and
controlled is known as the __________.
While operating a two-stage flash-type evaporator,
designed to operate in sea water of 70° F, the current
seawater temperature is 50° F, while the salt water feed
temperature is maintained at 170° F. The three-way
solenoid valve trips, directing the distillate pump
discharge to the bilge. Which of the following conditions
is the probable cause for this occurrence?
controlled variable
manipulated variable set point
control point
Excessive and
violent flashing in
each stage.
Insufficient vacuum
developed as a result
of the sea
temperature.
Excessive amount of
feedwater being
supplied to the first
stage.
Insufficient brine
density being
maintained in the
second stage.
What is the purpose of heat treating steel?
Develop ductility
Relieve stresses
All of the above
The major source of chemical contaminants in hydraulic
fluid is __________.
Traps in plumbing drains are designed to help prevent
__________.
microscopic steel
shavings
drain noises in the
living quarters
Improve machining
qualities
abrasive waste
The purpose of the crescent found in the illustrated
internal gear pump is to __________.
cause liquid to be
trapped in between
the gear spaces as
the gear passes the
crescent
anti-oxidant
compounds
drains clogging at the air pockets in the
toilets
sewer lines
maintain tolerances
between the drive
and internal gears
The amount of fluid friction or internal friction inherent in specific gravity
viscosity
a mineral lubricating oil is reflected as a measure of its
__________.
Thermostatic expansion valves can be adjusted for
suction pressure only head pressure only
__________.
A grease gun is generally used to lubricate a
condensate pump
__________.
ball bearing
An internal bypass is provided on some hydraulic
aeration of the oil
system suction strainers to help reduce the possibility of
__________.
133
garnet stone
air and a soap
solution to test all
joints
round file
phosphorescent
hydrazine bisodium
solution visible under
a black light source
oxidation by-products
escape of odors into
the living quarters
remove entrained air prevent flow
pulsations on the
discharge side
S.E. number
hydrolytic stability
superheat only
suction pressure and
box temperature
generator crosshead main turbine bearing
bearing
contamination of the pump cavitation
oil
Illustr
diesel engine wrist
pin bearing
spongy actuator
movements
GS-0127
Book Num
11
1887
Ans
D
11
1888
B
11
1889
B
11
1890
A
11
1891
C
11
1892
C
11
1893
C
11
1894
B
11
1895
B
11
1897
B
11
1898
D
11
1900
A
11
1901
B
Question
The range of values through which the input can be
varied without initiating an output response is known as
__________.
Coast Guard Regulations (46 CFR) require fresh water
tank vents which are open to the machinery space to
terminate above the deep load waterline, unless the
__________.
Answer A
deviation
vents are fitted with
suitable mechanical
closures
tanks have no
vents are fitted with tanks are fitted with
boundaries in
ball float check
suitable pressurecommon with the hull valves or an
vacuum relief valves
equivalent automatic
closure device
If an anchor windlass has been idle for some time, you
should __________.
Water allowed to accumulate in the hydraulic system oil
will cause an oxidation process producing by-products
which are normally __________.
repack all valve
stems
gums, acids, and
varnishes
lubricate it prior to
use
removed by cellulose
type filters
replace the
foundation bolts
neutralized by oil
additives
balance the warping
heads
not removed by
absorbent filters
It is possible to mount a double suction centrifugal
pump impeller with the vanes facing in the wrong
direction. This would cause the pump __________.
head capacity to
improve
discharge to be
reversed
efficiency to
decrease
slippage to decrease
The purpose of chill shocking an evaporator is to
__________.
prepare for a
hydrostatic test
stress relieve the
tubes
test for leaks in the
tubes
If the speed of a drill is too great, the drill will
__________.
A thermostatic expansion valve is properly controlling
evaporator superheat. Adjusting this valve to lower the
superheat will result in a/an __________.
cut faster
cut slower
break loose scale
deposits formed on
the tubes
rapidly dull
evaporator pressure evaporator coil over- evaporator capacity
decrease
feed
increase
expansion valve
diaphragm rupture
Insulation on deck steam piping must be installed
securely because __________.
loose insulation
deck steam lines are steam driven
contributes to steam subject to vibration
machinery cannot
leaks
from water hammer run with loose
insulation
set point
control point
deviation
loose insulation
prevents normal pipe
expansion
offset
yearly
quarterly
monthly
daily
hydraulic fluid
contamination
excessive fluid
friction
turbulent fluid flow
fluid pressure surges
The value of the controlled variable, which under any
fixed set of conditions the automatic controller operates
to maintain, is known as __________.
Air compressor receivers should be 'blown down' at
least __________.
Hydraulic machinery failures are commonly caused by
misalignment of the system components and by
__________.
Which of the problems listed could happen if you
attempted to force open a valve 'frozen' in position by
using a wrench on the hand wheel?
Answer B
offset
Answer C
sensitivity
Over compression of Bending of the valve Rapid corrosion of
the packing
stem
the valve disc
134
Answer D
dead band
not cut
Cracking of gaskets
upstream of the
valve
Illustr
Book Num
Ans
11
1902
D
11
1903
B
Question
A double suction centrifugal pump impeller has been
installed in the reverse direction, and will __________.
Answer A
Answer B
have a greater head operate with
capacity
increased impeller
efficiency
If a centrifugal pump were continually operated with the motor controller
pump would
discharge valve closed, the __________.
overload would open eventually overheat
When you adjust a thermostatic expansion valve
__________.
11
1904
C
11
1905
C
11
11
11
1906
1907
1908
B
A
A
11
1909
A
11
1910
C
11
1911
D
refrigerant must be
bled off the sensing
line before
adjustments are
made
If water were a semisolid, the linear distance a propeller blade thickness
would advance in one revolution is the __________.
fraction
all refrigerant must
be pumped into the
receiver before
adjustments are
made
mean width ratio
Answer C
discharge through
the suction side of
the pump casing
relief valve would
continuously cycle
open
time must be allowed
for conditions to
stabilize in the
evaporator before
further adjustments
are made
Answer D
require more power
to turn the shaft
pitch
skew back factor
motor would
overheat
all refrigerant must
be routed through
the dehydrator while
changing the
superheat setting
To ensure adequate lubrication and to prevent a high
operating temperature, the recommended amount of
grease injected into a ball or roller bearing is
approximately __________.
When the pressure applied to a Bourdon tube-type
pressure gage is reduced to atmospheric pressure, the
tube will begin to 'bend' towards the center of arc. Small
variations develop preventing the tube from returning to
its exact original shape due to the
50-75% of the
75-95% of the
25-50% of the
10-25% of the
original void space in original void space in original void space in original void space in
the bearing
the bearing
the bearing
the bearing
hysteresis
compression
homiostatious
deformation
gas eddys
The shaft sleeves have recently been replaced on a
centrifugal salt water service pump. The packing gland
is now drawn tightly up against the casing. Despite the
use of standard procedures to tighten the packing
gland, water continues to pour out along the shaft. The
probable cause for this situation is that the
__________.
the shaft sleeve "O"
ring seals were not
installed
suction head
pressure has
become excessive
the sealing water
flow to the stuffing
box is blocked
only two sections of
the lantern ring were
installed
Your Coast Guard engineer's license __________.
can be suspended or must be renewed
revoked upon
every 2 years
satisfactory proof of
negligence
Hydraulic machinery failures are commonly caused by
contamination of the hydraulic fluid and __________.
fluid friction
A weld with triangular cross sections is used to join two seam weld
surfaces at right angles to each other, and is called a
__________.
135
fluid turbulence
plug weld
serves in lieu of a U. entitles you to be
S. Passport
master of
uninspected motor
vessels under 100
tons
component
pressure surges
misalignment
tack weld
fillet weld
Illustr
Book Num
Ans
11
1913
B
11
1914
C
11
1915
A
11
1916
B
11
1917
B
11
1918
C
11
1919
D
11
1920
Question
Before drilling a hole in a piece of metal, the location of
the hole center should be __________.
The refrigeration system low pressure cutout switch is
actuated by __________.
Answer A
marked with chalk
Answer B
center punched
condenser pressure
The movement of steam piping, as a result of changes
in temperature, is compensated for by the use of
__________.
Traps at plumbing drain connections prevent
__________.
Devices, such as a pressure gage, that are subject to
continuous expansion and contraction are affected by
hysteresis. This is a natural process that __________.
expansion joints
a sensing bulb at the pressure changes in failure of the king
tail coil of the
the suction line
solenoid valve
evaporator
flexitallic gaskets
rigid brackets
union rings
system clogging
escape of odors
air pockets
drain noises
allows a material to
return to its exact
original shape
The manipulated
variables are
adjusted only from
the input demand
signals without
monitoring the outlet
conditions or
variables.
allows a resilient
material to resist
permanent
deformation
The controlled
variable must always
deviate from its set
point before any
corrective action is
initiated by the
controller.
is directly related to a
material's elastic limit
In an automated control system, which of the following
statements would apply to any type of closed loop
system?
permits a resilient
material to return to
its almost original
shape
Another term
commonly used in
conjunction with this
type of system is
'feed forward.'
A knocking sound emitted from an unloaded air
compressor is probably caused by __________.
Which of the following statements is true concerning
low pressure distilling units?
damaged intake
valves
High conductivity of
the distillate indicates
distillate salinity is
excessive.
insufficient cylinder
lubrication
Mesh separators are
used in evaporators
to filter the distillate.
a loose piston
A
11
1921
B
11
1923
D
11
1924
C
If the high pressure port became plugged in the springloaded, internal pilot, self-operated, steam pressure
reducing valve illustrated, which of the following
problems would probably occur?
excessively tight
mounting bolts
Increasing the
absolute pressure of
the shell will increase
the distiller's
capacity.
The main valve
The opening of the
would open wide and auxiliary valve "D"
deliver high pressure would have no effect
steam.
on the positioning of
the piston 'H.'
A piece missing from one blade of a four-bladed
accelerated stern
propeller could result in __________.
bearing wear
The sensing line for the low pressure cutout switch to a in the chill box
refrigeration system is located __________.
136
excessive shaft
vibrations
before the receiver
Answer C
scribed
Answer D
Illustr
blued
In order for a system
to fall under the
category of closed
loop control, there
should be no
adjustments required
to be made manually
by the operator.
Reducing the brine
density will reduce
the heat lost
overboard.
Main valve "B" would Spring "F" would
be opened by spring open valve "D"
'A.'
causing spring "A" to
GS-0044
compress.
unusual noises
all of the above
on the suction side of on the discharge side
the compressor
of the compressor
Book Num
Ans
11
1925
A
11
1926
A
11
1927
D
11
1930
D
11
1931
B
11
1933
C
11
1934
A
11
1935
C
11
1936
D
11
1937
D
11
1938
B
11
1939
C
11
1940
C
Question
A taper tap is correctly used for __________.
Answer A
starting threads in a
hole
Answer B
producing tapered
threads in a hole
Answer C
Answer D
deepening the extent finishing the
of existing threads in threading operation
a hole
in a blind hole
Two
Four
Six
Phillips
Allen
Standard
distillation
dehydration
condensation
Steel
Brass
Monel
Tungsten
drill socket
tapered sleeve
drill chuck
morse sleeve
0.5 psig
5 psig
15 psig
20 psig
operating at low
speed
high water pressure
under the hull
cavitation
operating in deep
river channels
The main valve "B"
will open wider
compressing the
main valve spring 'A.'
Downstream
pressure will be
greater than the
desired setting.
All of the above.
How many hidden lines are shown in the right side
None
(end) view of the drawing illustrated?
Which type of screwdriver listed would have a
Torx
'Keystone' type vertical cross-sectional tip?
In the production of freshwater from seawater through a evaporation
process of heating and cooling, the cooling phase of
production is usually called __________.
Which of the listed metals can usually be drilled without
lubrication?
All straight shanked twist drills must be mounted or held
in a __________.
The low pressure cutout switch used on a refrigeration
system compressor is set to cut in at approximately 5
psig and cutout at __________.
Excessive propeller vibration may occur as a result of
__________.
Which of the problems listed will occur if diaphragm "E", The auxiliary valve
in the illustration shown, develops a significantly large
will open wider due
hole?
to the action of
spring 'F.'
more than 9 months
in the last 18 month
period
The process of boiling seawater in order to separate it
into freshwater vapor and brine is usually defined as
__________.
dehydration
137
condensation
evaporation
GS-0021
GS-0044
less than 9 months in 30 months in the last 6 months or less in
36 months since dry- each 12 month
each of the last 12
months
docking or haul out period since it was
last dry-docked or
hauled out
secure the machine
evaluate a series of monitor off limit
evaluate only the
Information from a data-logger can be helpful in
conditions only when under relatively
latest logged data as readings to obtain
determining the long term probability of machinery
steady state
announced by an
operating trends
this is the best
failure if you __________.
conditions
audible and visual
indication of plant
signal
status
A Coast Guard engineer's license can be suspended or failure to attend
having your wages
being responsible for conviction of any
revoked for __________.
safety meetings
garnished
an oil spill ashore
misdemeanor ashore
Small passenger vessel of less than 100 gross tons
shall be dry-docked or hauled out at intervals not to
exceed 36 months if it is operated in saltwater a total
of___________.
Illustr
dissolution
Book Num
Ans
11
1941
D
11
1943
B
11
11
1944
1946
C
B
11
1947
A
11
1948
D
11
1949
D
11
11
11
1952
1953
1954
C
B
C
Question
Answer A
Which of the following statements is true concerning the The splash guard
shaft seal shown in the illustration?
remains stationary in
relation to the
rotating shaft.
Answer B
Answer C
Answer D
The face, seat, and The entire assembly All of the above.
sealing strip may be is of the split-type
repaired or replaced construction.
in an emergency
situation without
drawing the shaft or
dry-docking.
If the cutting edges of a drill are ground at different
angles, the __________.
The purpose of the low pressure cutout switch is to
__________.
hole will be oversized hole will be
undersized
maintain a preset
start and stop the
suction pressure to compressor at preset
the compressor
operating pressures
drill will seize
immediately
operate at minimum
efficiency
low pressure in the
steam supply to the
valve
reduced steam
pressure acting on
the underside of the
valve diaphragm
high pressure steam
acting upon the
auxiliary valve
Failure of the steam pressure reducing valve to deliver
proper steam pressure could be caused by
__________.
drill will not cut
maintain liquid
refrigerant at the
suction of the
compressor
frictional losses
downstream of the
valve
Partially clogged or scored nozzles in a two stage air
ejector unit of a flash distilling plant could result in a
__________.
fluctuating vacuum in flooded seawater
the flash chamber
feed heater shell
high water level in
the air ejector after
condenser
malfunctioning check
valve in the air
ejector discharge
In modern ship construction, high tensile steel (HTS)
may be permitted in __________.
A check run on a hydraulic anchor windlass during long
periods of inactivity should be carried out to
__________.
If two centrifugal pumps, driven by two independent
electric motors, operating at unequal speeds are
discharging an inflammable liquid through a common
discharge line, the higher speed pump may cause the
slower pump to __________.
the sheer strake
the keel strake
the margin strake
all of the above
prevent chemical
breakdown of
hydraulic fluid
stop
remove
condensation from
the fluid reservoir
turn backward
prevent the anchor
from seizing in the
hawsepipe
overheat
renew the internal
coating of lubrication
The dimension of the thinnest hydrodynamic film
developed within a full journal bearing, when all other
factors remain constant, depends upon the
__________.
The purpose of the refrigeration system low pressure
cutout switch is to __________.
pour point of the
lubricant
fluidity of the
lubricant
dielectric strength of interfacial tension of
the lubricant
the lubricant
protect the
compressor from
liquid flood back
protect the
start and stop the
compressor from low compressor upon
discharge pressure system demand
138
overspeed the
driving end
start the compressor
after a drop in the
evaporator pressure
Illustr
GS-0135
GS-0044
Book Num
Ans
11
1955
B
11
1956
B
Question
Mechanical shaft seals used on water service pumps
require lubrication of the seal faces to minimize
deposits of foreign matter on those surfaces. Which of
the following pressures and lubricants are required?
1957
Answer B
Answer C
Water under positive Oil under positive
pressure.
pressure.
Which of the following conditions can develop if a valve The valve disk will
with a badly scored valve stem is repacked?
crack.
Which of the following statements best describes a
'Keystone' shaped tip on a standard screwdriver?
11
Answer A
Water under
negative pressure.
Leaking and
premature failure of
the packing.
A straight shank that A four way tip cut at
does not widen at the right angles.
top of the blade.
C
11
1958
B
11
1959
B
11
1960
C
11
1961
C
11
1962
D
11
1963
C
11
1964
A
11
1965
D
11
1966
D
Answer D
Oil under negative
pressure.
The valve seat will
sustain damage due
to fretting.
A blade whose width A four way tip with
is approximately that 30° flukes.
of the shank
diameter with
flattened tapered
sides.
The valve disk will
become eroded.
Which of the following statements correctly describes
the construction of the close coupled sanitary pump
shown in the illustration?
The pump suction
and discharge
connections are
made with screwed
pipe fittings.
The pump and motor The pump impeller is The pump housing
classified as double and motor frame
have a common
suction.
provide for radial
shaft.
adjustment of the
shaft coupling.
In the diagram illustrated, item "4" represents a
__________.
Overheating of a hydraulic system may be a result of
__________.
check valve
globe valve
relief valve
motor operated valve
changing pump
discharge pressure
in response to
normal load
variations
a high oil level
incorrect fluid
viscosity
continued slow
recirculation of the oil
Condensate must be drained periodically from the air
compressor receivers to prevent __________.
When a flash-type evaporator is to be secured for an
extended period of time, the entire unit should be
drained, cleaned, and __________.
Rapid wear on the extreme outer corners to the cutting
edges of a drill bit is the result of the drill having
__________.
The oil separator (trap) used in a large shipboard
refrigeration system would be located between the
__________.
Which of the following types of nuts would be best
suited to use when it is important that a nut not work
itself loose due to vibration?
What type of material is used to construct the rotor of
the pump illustrated?
second stage
cylinder lockup
completely filled with
saltwater
oil sump
contamination
filled with descaling
compound
faulty operation of
pneumatic valves
tightly closed to
exclude air
corrosion of air
receiver baffles
vented to the
atmosphere
too much cutting
speed
not enough cutting
speed
too much clearance
angle
not enough margin
width
compressor
discharge valve and
the condenser
Square nut
condenser and the
receiver
receiver and the king receiver and the
valve
expansion valve
Wing nut
Cap nut
Castellated nut
Monel
Brass sheet
Bearing bronze
Steel
139
Illustr
GS-0070
GS-0125
GS-0144
Book Num
Ans
11
1969
D
11
1970
D
11
1971
D
11
1972
C
11
1973
B
11
1974
C
11
1975
C
11
1976
D
11
1977
C
11
1980
A
11
1981
A
Question
Answer A
In pressure measurement, absolute pressure is defined any two pressures
as the difference in pressure between __________.
measured with
respect to a common
reference
Answer B
atmospheric
pressure and
barometric pressure
at a given point
Answer C
Answer D
gage pressure and
a perfect vacuum
ambient atmospheric and the total
pressure
pressure at a given
point
According to Coast Guard Regulations (46 CFR), a
fresh water evaporator is classified as a/an
__________.
The nameplate of a reciprocating pump lists the
following dimensions: "7 X 6 X 4". The diameter of the
liquid cylinder is __________.
Which of the following nondestructive testing methods
can be used to detect a suspected subsurface defect in
a tail shaft liner?
The neutralization number obtained from a test sample
of lubricating oil will tell you precisely __________.
auxiliary boiler
fired pressure vessel auxiliary condenser
unfired pressure
vessel
4 inches
7 inches
6 X 4 inches
6 inches
Dye penetrant
Magnetic particle
Ultrasonic
All of the above
the amount of
mineral and metallic
solids that will not
burn
the number of
milligrams of
potassium hydroxide
used to neutralize a
measured sample
what type of acid
contaminants are
present in a
measured sample
how much sulfuric
acid the oil has
absorbed during
operations
An oil separator is a device used to remove oil from the
__________.
A decision has been made to change out 1,000 gallons
of lube oil in a vessel's main propulsion unit. Which of
the following statements is true regarding this decision?
liquid refrigerant
receiver
gaseous refrigerant
expansion valve
The neutralization
number has
decreased below
minimum levels.
The sole use of the
increase in the
neutralization
number need only be
the basis for this
decision.
In addition to the
increase in the
neutralization
number, the viscosity
of oil has also
increased.
A small rise in the
neutralization
number over several
years of use has
prompted this
decision.
In an automation system, the effect of a control action
sensed by a controller is known as __________.
command input
set point signal
output
feedback
Purging air from a hydraulic system is necessary when
__________.
adding small
the system has been the system has been the system has been
amounts of oil to the overheated
drained and then
idle for a long period
system
filled with new oil
of time
Which of the following statements concerning deep well A pumproom is not
cargo pumps is correct?
necessary.
The impeller is
located at the upper
end of the shaft.
Special priming
provisions are
necessary.
Joiner bulkheads on a MODU provide __________.
watertight integrity
structural support
compartmentation
140
The prime mover is
connected at the
lower portion of the
shaft.
tank boundaries
Illustr
Book Num
Ans
11
1984
C
11
1985
B
Question
Answer A
Oil separators installed in refrigeration systems serve to remove excess oil
__________.
from the system
Answer D
all of the above
The brine density in a submerged tube evaporator
should be maintained at __________.
Answer B
Answer C
remove oil entrained return oil entrained in
in high pressure
refrigerant vapor
liquid lines
back to the
compressor
crankcase
1.0 pounds of salt
1.5 pounds of salt
2.0 pounds of salt
per 32 pounds of
per 32 pounds of
per 32 pounds of
water
water
water
remains centered to shifts to direct port
shifts, blocking the
allow the servo pump replenishing flow to replenishing pump
discharge to build
the service tank
flow to the service
pilot pressure to shift
tank, thus building
the port unit
the required pilot
distributor valve
pressure to shift the
distributor valve "A"
3.5 pounds of salt
per 32 pounds of
water
shifts to block the
servo pump
discharge from the
starboard unit when
started, thus building GS-0123
pilot pressure to shift
the starboard unit
distributor valve
A screwdriver should never be used as a __________.
pry bar
chisel
punch
all of the above
The converter pneumatic control bypass valve, shown
in the illustration, receives it low pressure signal from
the __________.
Which of the following conditions will prevent a
shipboard pump from achieving its maximum suction
lift?
hot water return
manifold
converter
hot water circulating hot water supply line
pump discharge line
GS-0151
Leaks developed in
the suction piping.
Friction losses as a
result of improperly
sized pipe.
All of the above.
Gases or vapors
released in the liquid
as a result of greater
than normal pressure
drops.
Structural bulkheads on a MODU are usually
__________.
Plug valves installed in hydraulic systems are most
suitable for use as __________.
In a disk-type lubricating oil purifier, __________.
continuous
watertight
transverse
nonwatertight
main supply line
throttle valves
the purifier driving
gears are lubricated
by the reclaimed oil
as it leaves the bowl
variable flow control
valves
all dirt and sludge
are automatically
discharged with the
cooling water
two position flow
control valves
sealing water must
never be supplied
until after oil is fed to
the unit
check and choke
valves
deterioration of the
bowl ring gasket will
cause the purifier to
lose its water seal
low wax content
high pour point
high viscosity
all of the above
stroke filing
cross filing
draw filing
standard form filing
grease
oil
water
tallow
When the port power unit is started, as shown in the
illustration, the unloading valve "C" __________.
11
1986
C
11
1987
D
11
1988
A
11
1989
D
11
1991
B
11
1992
C
11
1993
D
11
1994
A
11
1995
B
11
1997
C
Properties of a good refrigeration oil include
__________.
Pushing the file endways (or with the axis), under
pressure, against the work, is called __________.
The lignum vitae in a stern tube bearing is normally
lubricated with __________.
141
Illustr
Book Num
11
1998
Ans
B
Question
The distributor valves, labeled "A" in the illustration,
provide several of the following functions, with the
EXCEPTION of __________.
Which of the following guidelines is considered to
reflect good design practices for shipboard steam
heating systems?
11
1999
B
11
2000
C
11
2001
C
11
2002
B
11
2003
B
11
2004
B
11
2005
C
11
2006
B
11
2008
D
11
2009
D
Answer A
a means for
recirculating oil flow
from the main
variable stroke pump
Answer B
aligning the servo
pump "I" discharge
for replenishing oil
lost from the main
system
Provide orifice-type Provide a dirt pocket
bypasses for all traps and strainer ahead of
and automatic
the steam trap on a
valves.
unit heater return.
Answer C
aligning the main
variable stroke pump
discharge/return with
the main rams
Answer D
placing a hydraulic
lock on the rams if
there is a failure of
the hydraulic power
unit
Provide all units with Wherever possible
a dirt trap and gate
install vertical runs
valve in the supply
for condensate
and a check valve on piping.
the return.
and let cool slowly in cherry red and
and carbonize it
the air
quench in water
intercostals
stiffeners
brackets
To anneal a copper gasket, you should heat the gasket
__________.
Reinforcing frames attached to a bulkhead on a MODU
are called __________.
Hydraulically, servo-operated, automatic, change over
valves, utilized in a two ram hydraulic steering gear,
serve to __________.
and quench it in oil
allow an alternate
main pump to start in
the fully loaded
condition thus
developing
immediate full torque
prevent either main
pump from being
hydraulically motored
when idle by cross
pressure flow
all of the above
prevent both units
from operating
simultaneously which
could result in
doubling the flow of
oil and pressure
leading to over
pressurization of the
system
Ball peen hammers are sized according to their
__________.
If a stateroom has a 6" by 12" opening through which air
travels at 100 feet per minute, what is the volume of air
being supplied to the stateroom?
Liquid is kept from leaking out at the shaft ends of a
helical gear pump by __________.
overall length
head weight
face diameter
peen head size
36 cu ft/min
50 cu ft/min
72 cu ft/min
100 cu ft/min
overlapping spaces
between gear teeth
a roller bearing
a stuffing box
the use of shaft end
caps
The stern tube flushing connection can be used to
_________,
assist in flushing out
all packing strips
when renewing
packing underway
provide a positive
flow of water through
the stern tube for
lubricating, cooling,
and flushing when
required
flush out brackish
water resulting from
extended in port
operation
serve as the only
source of supply of
water for the stern
tube bearing
side longitudinals
A Bourdon tube-type steam pressure gage is fitted with pressure shock
uneven expansion
a siphon loop to prevent damage from the direct effects
of __________.
The size of the discharge ring used for the efficient
rated capacity of that viscosity of the oil
operation of a disk type purifier is dependent upon the purifier
being purified
__________.
142
entering condensate entering steam
maximum design
specific gravity of the
speed of that purifier oil being purified
Illustr
GS-0123
Book Num
Ans
11
2010
D
11
2011
C
11
11
2012
2014
Question
A vessel is in compliance with federal regulations
regarding the discharge of sewage by __________.
Answer A
holding all sewage
onboard
Answer B
Answer C
Answer D
treating sewage in an pumping the sewage all of the above
approved system
ashore to an
approved container
In MODU construction, beams are transverse girders
which provide support to __________.
In the illustration, component "C" is used to replace
__________.
bulkheads
deckhouse structures decks
vertical frames
the rudder position
follow up gear
the necessity for
the hydraulic
manual repositioning telemotor receiver
of the six-way valve
the mechanical
method for
positioning of the
variable stroke
control of the main
pump
51.6 cu. ft/min
61.6 cu. ft/min
81.6 cu. ft/min
They are normally
lubricated and cooled
by the fluid being
pumped.
Once placed into
service, leakage
between the dynamic
seal surfaces may be
reduced by monthly
adjustment of the
spring compression.
size of the hole
tap drill size
clearance drill size
distance between the
face and the edge of
the file
Sliding spool
distance between the
point and the heel of
the file
Elongated ball or
cone
length of the tang
only
B
A
11
2015
C
11
2016
A
11
2017
C
11
2019
B
11
2020
A
11
2021
11
2022
If a stateroom has a 5 inch by 12 inch opening through
which the air travels at 100 feet per minute, what is the
volume of air being supplied to the stateroom?
41.6 cu. ft/min
Which of the following statements is true regarding
mechanical seals?
They may be used in They are not suitable
lieu of conventional for use on fuel oil
packing glands for
transfer pumps.
any service other
than saltwater.
The number "8" in the notation of an '8-32' tap, indicates thread diameter
the __________.
File lengths are determined by the __________.
overall length of the
file
Nutating disk
bulkhead
frame
stanchion
deck longitudinal
B
Which of the following is the most common type of
valving element used in hydraulic system directional
control valves?
Coast Guard regulations concerning marine sanitation
devices may be found in __________.
In MODU construction, beam brackets are triangular
plates joining the deck beam to a __________.
Restricted orifice
poppet
The cylinders and intercoolers of most low pressure air
compressors are cooled by __________.
water
oil
air
CO2
C
33 CFR Section 159 33 CFR Section 153 33 CFR Section 155 33 CFR Section 156
143
Illustr
GS-0123
Book Num
11
11
2023
2026
Ans
D
2029
A
11
2031
C
11
2032
C
11
2034
D
11
2035
D
11
2036
B
2037
Answer B
1/2 inch long having
a total of 20 threads
Answer C
a total of 20 threads
with a pitch of 1/4
inch
Which of the following problems will occur if a disk-type Contamination of the
centrifugal lube oil purifier contains insufficient sealing lube oil by
water prior to admitting oil flow to the bowl?
emulsification will
result.
The lube oil will not
be subjected to the
proper centrifugal
force.
The lube oil will
overheat and flash.
Feed water supplied to a flash type distilling plant will
flash to vapor in the first-stage due to __________.
flash chamber
pressure being lower
than the saturation
pressure
corresponding to the
feedwater
temperature
temperature being
higher than the
evaporation
temperature of the
supplied feedwater
Stanchions prevent the entire deck load on a MODU
from being carried by the __________.
The Phillips screwdriver has a blunt end and flukes with
an angle of __________.
An important consideration in selecting a lubricating oil
for use in a refrigeration compressor is for the oil to
__________.
If the intercooler relief valve lifts while an air compressor
is operating under load, you should check for
__________.
bulkheads
stringers
10°
45°
The output from shaft "K", shown in the illustration,
becomes an actual control factor when component(s)
__________.
Assuming valve "A" is correctly aligned in the no-flow
position as shown with the system in operation, which of
the following statements is true?
'F4' is rotating
A
11
11
Question
A tap marked '1/4-20' will cut a thread __________.
D
Answer A
1/4 inch in diameter
with a pitch of 20
threads per inch
Answer D
1/20 of an inch long
and 1/4 inch in
diameter
Illustr
Lube oil will
discharge from the
heavy phase
discharge port to the
sludge tank.
heat exchange
orifices finely
surfaces being
atomizing the heated
directly in the path of feedwater entering
the entering
the flash chamber
feedwater
frames and beam
brackets
30°
deck longitudinals
60°
have a high viscosity mix readily with
index
refrigerant
have a high freezing have a low pour point
point
a defective pressure a leak in the
switch or pilot valve intercooler piping
leakage through the
low pressure
unloader control
diaphragm
'F2' and 'F3' are
energized
leaking high pressure
discharge valves
Valve "C" would be
closed.
Valve "D" would
normally open before
valve "B".
GS-0049
The fixed delivery
pump would be
stopped
automatically by a
pressure switch.
144
'F4' is hydraulically
locked
Valve "B" would be
open before valve
"D".
'F1' and 'F2' are
energized
GS-0123
Book Num
11
2038
Ans
Question
Which of the following statements represents the main
difference between a stuffing box gland and a
mechanical seal for sealing the shaft of a centrifugal
pump?
Answer A
Packed stuffing box
glands are subject to
wear, but mechanical
seals are not.
Answer B
Packed stuffing box
glands must be
cooled by the liquid
being pumped, but
mechanical seals do
not require cooling.
In a shell-and-tube type hydraulic fluid cooler, the
amount of heat transferred from the hydraulic fluid to
the cooling water depends upon __________.
the temperature of
the hydraulic fluid
the flow rate of both the temperature of
the cooling water and the cooling water
the hydraulic fluid
all of the above
Support of MODU side plating is provided primarily by
transverse __________.
With regards to the American National Screw Thread
nomenclature, 'pitch' is the __________.
beams
girders
bulkheads
angle formed by
adjacent flanks of a
thread
distance between
number of threads
divided by the length corresponding points
on adjacent threads
of the threaded
portion of the screw
angle of taper formed
by the centerline of
the screw and the
crests of the thread
The presence of scale and dirt on the saltwater side of a clogged lube oil
lube oil cooler is usually indicated by __________.
strainers
seawater leaking into decreasing lube oil
the lube oil system
pressure
gradually increasing
lube oil temperature
One refrigeration ton is equal to __________.
A leaking suction valve in the second stage of a two
stage, high pressure, air compressor can cause
excessively high __________.
When the steering gear receives a command signal for
a 15° right rudder, during the initial period of movement
of the rudder __________.
2,000 BTU/hr
12,000 BTU/hr
first stage discharge pressure in the
pressure
aftercooler
C
11
2040
D
11
2041
C
11
2042
C
11
2043
D
11
2044
C
11
2045
B
11
2046
A
11
2047
B
11
2048
A
180 BTU/hr
second stage
discharge pressure
shaft "K" will rotate,
but its output to "M"
will be nullified
Answer C
If packing fails, the
pump can be kept
running temporarily
by tightening the
gland, but if a
mechanical seal fails
it must be totally
renewed to stop the
leakage.
frames
Answer D
The sealing surface
of a mechanical seal
is parallel to the
shaft, but the sealing
surface of a packed
gland is
perpendicular to the
shaft.
2,880,000 BTU/day
compressor final
discharge
temperature
shaft "K" will rotate
shaft "L" will cause
shaft "L" will rotate,
causing "M" to rotate shaft "K" to rotate via but its output to "M"
reducing linkage
the planetary
will be nullified
length
differential gear
gear puller
drift pin
come along
The tool used to remove a ball bearing from the shaft of slugging wrench
a motor is called a __________.
Fabric type packing, such as flax or hemp, is best
low temperature use high temperature use use where alignment superheated steam
suited for __________.
is critical
applications
145
Illustr
GS-0123
Book Num
11
2049
Ans
2050
B
11
2051
A
2052
Answer A
vent accumulated air
that would interfere
with the operation of
the controller
C
11
11
Question
The port labeled "J", shown in the illustration, serves to
__________.
B
11
2053
D
11
2054
A
11
2055
B
11
2056
D
11
2057
D
11
2059
A
11
2061
C
11
2062
B
Answer B
provide oil flow under
pressure from the
compressor lube oil
pump to activate the
cylinder unloading
mechanisms to load
up the necessary
cylinders
Answer C
bleed off pressurized
oil from the cylinder
unloading
mechanism to allow
the cylinders to
unload
Answer D
sense crankcase
suction pressure as
the required
feedback for proper
operation of the
unloader control
device
Which of the listed problems is occurring if a coil type
high pressure evaporator constantly requires an
increase in the coil steam pressure in order to maintain
capacity?
Lighter longitudinal stiffening frames on the MODU side
plating are called __________.
The follow-up gear on an electro-hydraulic steering gear
__________.
The brine density is
improper.
Heat transfer
surfaces are being
layered with scale.
Impure distillate is
being produced.
Shell vapor pressure
is constantly
decreasing.
stringers
side frames
side stiffeners
intercostals
relieves excessive
fluid pressure.
Raw water is the
cooling medium.
How much heat can a 5 ton refrigeration unit remove
from a refrigerated space?
Leaking valves in an air compressor can be a result of
__________.
60,000 BTU/hr
allows for rudder
movement faster
than the movement
of the ship's wheel.
The surge tank must
be located a
minimum of 4 feet
above the highest
finned tube.
100,000 BTU/hr
returns the rudder to
amidships when the
wheel is released.
Which of the following statements is true concerning a
radiator type heat exchanger?
takes the pump off
stroke when the
desired rudder angle
is attained.
Water cooled
exhaust elbows
remove the heat.
120,000 BTU/hr
excessive
compressor speed
irregular
compression strokes
Six-way valve
Motor controller onoff switches
80,000 BTU/hr
excessive discharge abrasion, dust, and
pressure
dirt
In order to change over the main pumps shown in the
"A"
illustrated steering gear, which of the components listed
must be manually actuated?
When renewing spiral packing in a centrifugal pump
left in that position
stuffing box, after the packing is firmly seated, the
packing gland nuts should be __________.
Aftercoolers are used with air compressors to
__________.
reduce the
temperature of
compressed air
The heavier outboard strake of deck plating on a MODU stiffener
is called the deck __________.
In which of the following types of evaporators is the
Solo shell
control of brine density least important?
evaporators
146
"C"
loosened until the
gland clears the
stuffing box
RA-0013
Air flow provided by a
fan is used as the
cooling medium.
loosened, and then
retightened until they
are only finger tight
tightened an
additional 10% to
compress the
packing
decrease the density dampen pressure
of compressed air
pulses in the
discharge air
beam
stringer
ensure complete
expansion of the
compressed air
doubler
Flash evaporators
Basket evaporators
Submerged tube
evaporators
Illustr
GS-0123
Book Num
Ans
11
2063
D
11
2064
C
Question
Heat exchanger tubes can be protected against erosion
and abrasion by the use of __________.
What is the equivalent tonnage of a refrigeration system
rated at 48,000 BTU per hour?
Leaking valves in a low pressure, reciprocating, air
compressor can result from __________.
Answer A
metallic packing on
the inlet end
2.5
Answer B
Answer C
fiber bushings in the zinc pencils on the
ferrules
waterside
3
4
Answer D
plastic tube end
protectors
5
excessive
compressor
discharge pressure
operating the
compressor at
excessive speed
uneven piston stroke abrasion by dust and
in the compressor
dirt
positive
displacement
impeller
six-way valve
centrifugal impeller
Illustr
11
2065
D
2066
C
The impeller shown in the illustration is an example of
a/an __________.
axial piston impeller
11
2067
C
Rudder motion is prevented from exceeding the
movement of the steering wheel by the __________.
return springs
11
An air compressor is equipped with an intercooler and
an aftercooler to __________.
prevent overheating
inject water vapor
into the compressed of first stage valves
air
increase compressor reduce the
compressed air
efficiency and
charge density
economy
Return lines in a non-pressurized hydraulic system
reservoir should enter the tank well below the fluid
surface level to __________.
Evaporator priming can be caused by high water level,
fluctuating steam pressure, or __________.
Where is thicker plating usually found in the
construction of integral tanks on a MODU?
If it were possible to simultaneously operate both main
pumps shown in the steering gear illustration, which of
the following statements would be true if the starboard
power unit were to be brought on line with the port unit
already in operation?
prevent foaming
prevent moisture
accumulation
prevent vacuum
formation
fluctuating shell
vacuum
On the outside of the
tank.
The indicated valve
spool in "C" would
shift to the left
low brine density
low feed temperature a brine overflow weir
set too low
At the top of the tank. At the center of the
tank.
The starboard
Pump "G" would
distributor valve "A" supply servo control
would allow
oil flow to control the
recirculation of the
main pump stroke
GS-0123
starboard main pump control mechanism
11
2068
C
11
2069
A
11
2070
A
11
2071
B
11
2072
C
11
2073
B
11
2074
B
11
2076
B
At the bottom of the
tank.
Pump "I" would
supply replenishing
oil to the system
follow-up gear
When renewing the shaft packing on a centrifugal pump always turn down the ensure that the
check the stuffing
equipped with an external liquid sealing supply, you
shaft in a lathe to
lantern ring is aligned box for irregularities
should __________.
ensure a snug fit
with the sealing
with a dial indicator
supply opening
If an air conditioning system were rated at 24,000 BTU, 1 ton
the equivalent tonnage of the unit would be
__________.
In order to adjust the temperature set point of the
A
temperature regulating valve illustrated, you should
adjust the device indicated by the letter __________.
high pressure
impeller
GS-0130
differential gear
accommodate
thermal expansion
2 tons
3 tons
make sure the seal
cage is always
positioned at the
base of the stuffing
box
4 tons
B
M
L
GS-0045
147
Book Num
Ans
11
2077
A
11
2078
B
11
2079
D
11
2080
D
11
2081
D
Question
Answer A
If a ship service air compressor operating in intermittent compressor would
service were failing to unload, the __________.
stop abruptly when
power was secured
Answer B
compressor would
run continuously
On an electro-hydraulic steering gear, which of the
listed devices will keep the rudder from over traveling
the bridge signal?
A multistage flash evaporator will be unable to produce
consistently pure distillate if the __________.
Rudder angle
indicator
Follow-up gear
distillate cooler is
dirty
tubes of the saltwater distillate meter stops vacuum is fluctuating
feed heater are
flooded internally
The Reed and Prince screwdriver has a sharp pointed
end with flukes that have an angle of __________.
10°
30°
4 ton
4.5 ton
5 ton
eliminate scaling
problems on the
saltwater side
reduce erosion of
heat exchanger
surfaces
ease the load on the prevent
saltwater service
contamination should
pump
leaks develop
Which of the following is the probable cause for a motor Defective pressure
driven, low pressure, reciprocating air compressor to
switch
repeatedly trip the circuit breaker upon starting?
Leaking suction
unloader
Compressor starting Compressor starting
against full load
without any load
Most hydraulic steering gears are fitted with relief valves function when the
which __________.
rudder is amidships
relieve excess whip
pressure from the
hydraulic oil system
D
11
2083
C
On tankers with manually operated tank valves, the type butterfly valve
of valve most commonly used is the __________.
11
2084
D
11
11
11
2086
2087
2088
D
C
C
C
Trip the three way
dump valve.
3 ton
2082
If a refrigeration box develops a heat load of 60,000
BTU/hour, what size refrigeration unit would be
required?
In heat exchangers, seawater pressure should be
maintained lower than freshwater pressure to
__________.
Steam supply piping to deck machinery is insulated in
order to __________.
maintain good
turbulent free steam
flow through the pipe
148
Secure the casing
vapor vent line.
protect the piping
assembly from
external rudder
shock
prevent superheating reduce heat loss
of the steam
from the system
Illustr
45°
check valve
11
2085
60°
Secure the stuffing
box sealing water
line.
varying the direction moving the cylinder
block off center from
of rotation of the
the reaction ring
prime mover and
throttling the pump
output
globe valve
gate valve
When securing a centrifugal type distillate pump, which Close the pressure
of the listed steps should be carried out first?
gage isolation
valves.
Regarding the pump shown in the illustration, the
varying the direction
quantity and direction of fluid flow is controlled by
of rotation and size
of the pintle valve
__________.
11
Answer C
Answer D
air receiver indicated compressor would
pressure would be
require more than
excessively low
the normal amount of
lubrication
Electric transmitter
Rudder angle limit
switch
moving the reaction
ring off center from
the cylinder block
relieve excessive
telemotor pressure
contain small steam
leaks
GS-0059
Book Num
Ans
11
2089
B
11
2090
B
11
2092
A
11
2093
B
11
2094
B
11
2096
C
11
2098
D
11
2099
D
11
2101
D
11
2102
A
11
2103
C
11
2104
D
11
2105
A
Question
A piece of tapered round stock 36 inches long, 4 inches
in diameter at the large end and 2 1/2 inches in
diameter at the small end. What tailstock set over was
used to machine the taper?
What is the maximum steam pressure allowed by Coast
Guard Regulations (46 CFR) to be provided in the
steam heating system of the living spaces?
When a heat exchanger is used as a cooler, excessive
cooling water flow should be avoided to prevent
__________.
After the installation of new impeller wearing rings by
pressing them onto the pump impeller hub, it is
advisable to __________.
Answer A
0.375 inch
Answer B
0.750 inch
Answer C
1.500 inch
Answer D
2.500 inch
30 psig
45 psig
60 psig
75 psig
erosive tube failure
waterside deposit
buildup
tube sheet bowing
water hammer
damage
dynamically balance check the shaft and visually inspect the
the shaft and
impeller assembly on rings after about an
impeller
centers to see if the hour of service
ring surfaces are true
If a refrigeration system extracted 48,000 BTU per hour, 2 tons
the equivalent tonnage of the unit would be
__________.
If a ship service air compressor failed to unload the
compressor would
__________.
run continuously
4 tons
6 tons
all of the above
8 tons
air receiver pressure belts could slip when
would be excessively starting
low
In an electro-hydraulic steering system, rudder shock is a differential gear
return springs
a hydraulic
limited by __________.
accumulator
Which of the following statements is true regarding a
Theoretically, there is Theoretically it is self The discharge side
priming.
should be protected
positive displacement rotary pump?
no limit to shut off
against excessive
head pressure.
pressure build up via
a relief valve.
compressor would
pump lube oil
Rapid fluctuation of the last effect shell vacuum in a
submerged tube evaporator can cause __________.
erratic air ejector
operation
air leaks in the tube
nest
priming in that effect
In a heat exchanger, excessive fluid velocity should be
avoided to prevent __________.
Compensated flow control, or constant flow valves are
used in hydraulic systems to __________.
erosive tube failure
water hammer
damage
assure constant fluid
temperature
An air conditioning system, required to remove from
33,000 to 35,000 BTU per hour, should have a
minimum capacity of __________.
Carryover in a flash type distilling plant can be a result
of __________.
1.5 tons
waterside deposit
tube sheet bowing
buildup
maintain the original allow for changes in
fluid viscosity
pressure and
temperature within
the system
2.0 tons
2.5 tons
a pressure drop
high distillate
through the loop seal conductivity
low distillate
conductivity
compensate for
major leaks in the
system
faulty operation of
the brine overboard
pump
149
rapid scaling in all
effects
relief valves
All of the above.
3.0 tons
Illustr
Book Num
11
11
11
2106
2107
2108
Ans
C
C
A
11
2109
A
11
2110
B
11
2112
B
11
2113
C
11
2114
A
11
2115
B
11
2116
A
11
2119
A
11
2121
C
11
2122
D
Question
If a ship service air compressor failed to unload, the
__________.
Answer A
compressor would
dangerously
overspeed
If the controlled system temperature downstream of the Stem "C" moves
valve shown in the illustration, decreases below the set down.
point, which of the listed actions will occur?
Answer B
air receiver pressure
would be excessively
low
Power piston "H"
moves up.
Answer C
circuit breaker may
open on starting
Answer D
compressor would
pump lube oil
Spring "F" is
compressed.
Valve "D" closes.
If a centrifugal pump develops insufficient discharge
Replace the rings.
pressure as a result of worn wearing rings, which of the
following corrective actions is required?
Throttle in on the
discharge valve.
Always replace the
Throttle in on the
wearing rings and
suction valve.
the impeller as a set.
Accidental flooding of the engine room bilges through
the bilge system is prevented by __________.
GS-0045
installing eductors in installing a swing
all bilge rose boxes check before each
bilge valve
using a positive
displacement
reciprocating bilge
pump
When the compressed air reservoir is placed in line with fitted with a manhole frequently drained of
an air compressor and is used as an aftercooler, the
condensed water
reservoir must be __________.
In an electro-hydraulic steering system, damage due to buffer springs
relief valves
rudder shock is prevented by __________.
A device incorporating a variable orifice placed in series allow free movement allow fluid flow in one
with a check valve in a hydraulic system, is used to
of hydraulic fluid in
direction only
__________.
both directions
oil flowing through
the pumps
allow throttled fluid
flow in one direction
only
restrict hydraulic fluid
flow in both
directions
The receiver used in a refrigeration system
__________.
stores liquid
refrigerant
allows refrigerant
subcooling
prevents compressor
surging
Zinc anodes are installed in a marine sea water heat
exchanger cooling system to __________.
Major repairs or alterations affecting the safety of small
passenger vessels of less than 100 gross tons shall
__________.
inhibit oxidation
prevent scaling
eliminate corrosion
not be made without be permissible
the knowledge and
without the
approval of the OCMI knowledge and
approval of the
Officer in Charge of
Marine Inspection
be made at anytime
convenient to the
vessel operator
without prior approval
be made only when
Coast Guard
Administrative Form
2892 is submitted
If there is a sudden drop in the capacity of a
reciprocating air compressor, you should check for
__________.
The illustrated system is used to __________.
broken compressor
valves
excessive
compressor speed
a defective pressure
switch
When a reciprocating pump is operating at maximum
speed, the cushioning valves should be __________.
stop-check valves
installed in the bilge
suction manifolds
collects
noncondensable
gases
control electrolysis
worn piston rings or
cylinder liners
fitted with a moisture fitted with a sight
trap at the inlet
glass
process sludge found process sludge found process oily-water
on motor vessels
on steam vessels
mixtures present in
the bilge water
wide opened
half opened
3/4 opened
150
Illustr
dashpots
condition reduction
gear lube oil by
removing the water
almost completely
closed
GS-0113
Book Num
Ans
11
2123
A
11
2124
C
11
2125
C
11
2126
D
11
2127
B
11
2128
D
11
2129
D
11
2130
2132
C
11
2133
D
11
2134
C
11
2135
A
2136
Answer A
rudder angle
indicator
L
During the inspection for certification of small
passenger vessel of less than 100 gross tons, a
hydrostatic test of 1-1/4 times the maximum allowable
working pressure shall be made to __________.
tubular heat
exchangers
The root opening dimension shown in the illustration is
used to indicate the __________.
penetration depth of
the desired weld
In the spring-loaded, steam pressure, reducing valve
shown in the illustration, if the downstream pressure
falls below a preset value __________.
If the capacity of a reciprocating air compressor
gradually drops off, the cause could be __________.
spring "A" will be
compressed
leaking compressor
valves
a clogged air filter
Which of the following statements correctly describes
the operation of the pump shown in the illustration?
The pump stuffing
box is externally
supplied for sealing.
The pump suction is The pump shaft is
through the vertical fitted with tapered
flange illustrated on needle bearings
the left.
D
11
11
Question
Rudder position is shown on the bridge by the
__________.
Which lettered component, shown in the illustration,
indicates the location of the receiver?
The purpose of a restrictor valve, as it is used in a
hydraulic hatch cover system, is to __________.
B
prevent oil backflow
to the actuators
Answer B
follow-up gear
Answer C
telemotor position
H
the device between
line 14 and line 15
prevent the hydraulic control the speed of
pump from
the hatch cover
overheating
movement while
closing
hydraulic
refrigeration service
accumulators
heat exchangers
distance across the
bottom of the "V"
groove
valve "D" will open
Answer D
Rapson slide
indicator
K
RA-0012
restrict the oil supply
to the hatch covers
not in use
oil fired boilers
width across the
bottom of the
weldment
diaphragm "E" will
deflect downward
maximum thickness
of the completed
weld
all of the above
worn cylinder liners
all of the above
GS-0076
GS-0044
The pump stuffing
box is provided with
an internal sealing
line.
The static suction head of a horizontal centrifugal pump, discharge liquid level discharge liquid level suction liquid level
is the difference in elevation between the __________. and the suction liquid and the pump
and the pump
level
centerline
centerline
suction submergence
level and the pump
discharge
A drilled hole is accurately finished to size with a
__________.
In a refrigeration plant, one purpose of the receiver is to
__________.
In the radial piston pump shown in the illustration, oil
will enter the cylinder as the piston travels from position
__________.
Emergency lighting on small passenger vessels of less
than 100 gross tons for lounge areas below the main
deck shall be __________.
center drill
finish drill
broach
reamer
cool the refrigerant
gas
1 to position 2
superheat the
refrigerant liquid
2 to position 3
store the refrigerant
condense the
refrigerant
4 to position 1
3 to position 4
Illustr
GS-0070
GS-0060
illuminated at all
illuminated
times while vessel is automatically and
underway
actuated upon failure
of the main lighting
system
151
portable battery
both "A" and "C"
operated and have
sufficient capacity for
8 hours of
continuous
operations
Book Num
11
2137
Ans
Answer B
mechanical linkage
C
Question
Answer A
In the spring-loaded pressure reducing valve illustrated, diaphragm "E"
the auxiliary valve "D" is closed by __________.
When air compressors are arranged for automatic
bypassing the
operation, the cylinders can be unloaded during starting discharge to suction
by __________.
fitting depressors
which hold the
suction valve plates
on their seats
step unloading the
cylinders in a multicylinder machine
all of the above
If a higher than normal water level is observed through
the inspection port of a flash evaporator, you should
suspect __________.
The motor operated valve, shown in the illustration, is
represented by item number __________.
a leak in the
feedwater heater
improper vacuum
a malfunctioning
brine pump
1
2
3
a clogged
desuperheater water
strainer
4
Reciprocating air compressor bearing failure may result
from __________.
In a fixed displacement axial piston hydraulic motor, the
speed is varied by __________.
a misaligned
crankshaft
regulating the ratio
between torque and
speed via the torque
limiter at the motor
When checking zinc plates, or pencils in the
refrigerating system condenser, you should
__________.
For drilling or machining cast iron, which of the cutting
lubricants is it necessary to use?
One of the main differences between a propeller pump
and a centrifugal pump is the absence of a
__________.
paint and insulate the renew the plates at
each inspection
plates to prevent
corrosion
Lard oil
Soluble oil
replace the zincs if
file the plates to
deteriorated by 50% change the negative
value
Kerosene
None of the above
volute in the
centrifugal type
pump
volute in the
propeller type pump
velocity nozzle in the reciprocating piston
centrifugal type
in the centrifugal type
pump
pump
In a flash evaporator, scale as a result of higher than
normal temperatures is most likely to occur in the
__________.
The purpose of the vertical 'grooves' machined on the
main valve "G", in the spring loaded temperature
regulating valve shown in the illustration, is to
__________.
Which of the listed types of seals is used effectively for
pumps handling toxic or highly flammable liquids that
cannot be permitted to escape into the atmosphere?
second stage feed
heater
saltwater feed heater distillate cooler
Conventional stuffing External mechanical Double mechanical
box
seal
seal
Rubber bellows
mechanical seal
No two drills from differing drill sets are of the exact
same size, with the exception of the drills measured as
0.25 inch. These two drills are the 1/4 inch and the
__________.
No. 1 drill
"A" drill
11
2138
D
11
2139
C
11
2140
A
11
2142
D
11
2143
D
11
2144
C
11
2145
D
11
2146
B
11
2147
B
11
11
11
2148
2149
2150
B
C
B
Answer C
a spring
Answer D
high pressure steam
Illustr
GS-0044
GS-0125
over tightened drive
belts
directing the motor
output flow through a
bypass line
provide downstream provide for quieter
turbulence
valve operation
152
"E" drill
contaminated sump
oil
maintaining a
constant flow and
pressure input
compensate for
upstream pressure
surges
No. 80 drill
all of the above
controlling the input
flow rate
second stage vapor
separator
increase sensitivity
GS-0045
Book Num
11
2151
Ans
A
11
2152
D
11
2153
A
11
2154
C
11
2155
C
11
2156
D
11
2157
B
11
2158
A
11
2160
B
11
2161
C
11
2162
D
Question
In MODU construction, a large number of watertight
bulkheads results in __________.
Answer A
Answer B
increased capacity to decreased capacity
set flooding
to set flooding
boundaries
boundaries
Answer C
reduced
compartmentation
Answer D
greater deck load
capacity
Which of the following statements describes the
It eliminates the
It is fully automatic in
advantage of the mechanical shaft sealing system over repairing or renewing operation.
the stuffing box and packing method of shaft sealing for of the shaft sleeve.
propulsion shafting?
It allows for the
removal and
reinstallation of all
parts without
dismantling the
shafts.
Each of the above is
correct.
The dimension of the sensing gap in the left hand limit
sensor assembly shown in the illustration is
__________.
Zinc rods are installed in the refrigeration system
__________.
3/8 inch
1/2 inch
1/8 inch
1/4 inch
GS-0010
A single-acting simplex pump makes 100 single strokes 92 GPM
per minute. The diameter of the water cylinder is 6
inches and the stroke is 10 inches. If the efficiency of
the pump is 90%, what is the capacity of the pump?
61 GPM
saltwater condenser evaporator tail coil
heat exchanger
heads
55 GPM
18 GPM
Deck rails on passenger decks of vessels engaged in a 30 inches high
ferry or excursion type operation shall be at least
__________.
Each vessel designed to carry more than 49
a continuous
passengers must have __________.
longitudinal
watertight bulkhead
36 inches high
39 1/2 inches high
42 inches high
a collision bulkhead
at least one
watertight bulkhead
to prevent fire
advancement for 2
hours
a minimum of four
watertight bulkheads
The pressure side of the radial piston hydraulic motor
as shown in the illustration, is aligned to piston number
__________.
When shifting suction from one fresh water tank to
another, if the fresh water pump loses suction you
should___________.
High salinity distillate being discharged from a flashtype distilling plant may be the result of __________.
2
3
2 and 3
Allowances may be made for the expansion and
contraction in piping by the use of expansion joints or
__________.
Illustr
liquid line strainer
1
liquid line receiver
GS-0059
loosen the
mechanical seal
vent the pump casing check the discharge
strainers
maintaining the
carrying the brine
proper distilling plant level below normal
heat balance
unions
retractable flanges
153
all of the above
leaks in the demister venting of the
baffles
saltwater heater
drain pump
union bulkhead
bends or loops in the
fittings
line
Book Num
Ans
11
2163
B
11
2165
C
11
11
11
11
2166
2167
2168
2169
Question
Answer A
For any given volume of compressed air produced by a increase the power
multistage air compressor, interstage cooling will
required for
__________.
compression
Answer B
decrease the power
required for
compression
Answer C
allow isothermal
compression of the
air charge
In the illustrated heating system, what is the maximum
height the heater should be mounted above the deck?
5"
6"
12"
Solid contaminants are prevented from entering the
main lube oil system by way of the main engine sump,
through the use of __________.
fine mesh screening
placed around the
pump suction line in
the sump
When the steering wheel is turned, oil is directed to the
steering gear rams by __________.
moving the automatic moving the receiving
modulating the oil
flow with the six-way pressure differential telemotor which
regulates the twovalve
valve
way valve
Penetrations and openings in watertight bulkheads in a
vessel of less than 100 gross tons must __________.
only be placed in
transverse watertight
bulkheads that
extend to the bulwark
deck
C
D
D
B
11
2170
D
11
2172
D
11
2174
D
Answer D
allow the
compressed air
volume to remain
constant
24"
Illustr
GS-0150
baffles installed
without limber or
lightening holes to
trap the particles
a suction inlet
located
approximately 10
inches (254 mm)
above the sump
bottom
a 10 inch (254 mm)
dome installed just
below the suction
inlet and provided
with a pipe-opening
within one inch of the
dome
varying the
eccentricity of a
floating ring or angle
of a tilting box
be provided with non- incorporate approved be kept as high and
as far inboard as
packed slip joints for sluice valves
practicable
expansion to permit
passage of piping or
electric cable
Operating a reciprocating air compressor without an air carbon deposits on
filter will cause __________.
valves and pistons
excessive wear on
valves and cylinder
liners
a clogged air intake
excessive
compressor
discharge pressure
Which of the flange types listed identifies the
Raised face flange
construction of a pipe joint where a flange is slipped
over a length of pipe, the pipe end is heated, then setup
(flanged) in a special machine, and then the end of the
pipe is machined to form the actual face of the joint?
Socket joint
Walseal joint
Lap joint (van stone)
flange
Which of the following statements is correct concerning The inner race
antifriction bearings installed on pumps?
should be free to turn
on the shaft.
A water regulating valve controls the refrigeration
cooling water outlet
condenser cooling water flow in response to condenser temperature
__________.
The outer race
should be free to turn
in its housing.
liquid refrigerant
outlet temperature
Alignment is not a
critical factor in their
installation.
liquid refrigerant
outlet pressure
They are usually
pressed onto their
shafts.
refrigerant vapor inlet
pressure
154
Book Num
Ans
11
2175
C
11
2176
A
11
2177
B
11
2178
D
11
2179
C
11
2181
D
11
2182
C
11
2184
D
11
2185
11
2186
11
2187
Question
Which of the screwdrivers listed has a tip surrounded by
parallel fluted ridges resembling the ridges of a splined
socket wrench?
Proper internal lubrication of a hydraulic anchor
windlass left idle for extended periods can be
accomplished by __________.
If the flow rate to a linear actuator is reduced by half of
the original amount, the __________.
Answer A
Phillips
Answer B
Standard
performing a check
run on the unit at
regular intervals
pump discharge
pressure will be
reduced by a
proportional amount
testing the hydraulic
fluid for proper pH
Answer C
Torx
checking the
reservoir for proper
level
speed of the actuator speed of the actuator
will be reduced
will be increased
Answer D
Reed and Prince
cleaning strainers at
regular intervals
the actuator will
move erratically
Irregular feeding or surging of the feedwater supply to a erratic water flow
flash evaporator may be attributed to __________.
through the air
eductor
a clogged vent line
from the air eductor
condenser
excessive pressure a dirty strainer in the
in the seawater feed saltwater feed pump
heater
suction line
Operating a reciprocating air compressor without an air immediate piston
intake filter can result in a/an __________.
damage
immediate clogging
of the intake
possible explosion in deposit of carbon on
the compressor
the valves
#2
The top, front, and right side views of three different
objects are shown in the illustration. In which object are
all three views correct and complete?
#16
#21
All of the above
GS-0004
4 inches
direction of the
closed position
open position
plunger slide
A close watch on the Constant cleaning to Constant testing of
temperature.
remove oil and dirt. the relief valves.
direction of the flow
D
The nameplate of a reciprocating pump lists the
following numerals as indicated 7" X 6" X 4". The
diameter of the steam cylinder is __________.
An arrow stamped on the valve body of a water
regulating valve indicates the __________.
Which of the following frequent maintenance
procedures is required of compressed air receivers?
B
The main difference between a common lathe dog and
a safety lathe dog is that the latter __________.
is more easily
centered
has a headless set
screw
has a spring loaded
catch
allows for misaligned
center holes
The penetration of watertight bulkheads and watertight
decks by rigid non-metallic piping is prohibited except
when __________.
using an acceptable
metallic fitting,
welded or otherwise
is attached to the
bulkhead or deck by
an acceptable
method
the rigid non-metallic
plastic pipe is at least
of schedule 160 and
a metallic shut off
valve is provided
adjacent to the
through deck or
bulkhead fitting
metallic shut off
valves are welded to
nonmetallic hull
materials
two non-remotely
operated metallic
valves are installed
on either side of the
deck or bulkhead
regardless of
accessibility
A
Illustr
155
6 inches
7 inches
8 inches
Frequent draining of
water.
Book Num
11
2188
Ans
C
11
2189
A
11
2191
C
11
2192
D
11
2194
D
11
2195
B
11
2196
A
11
11
2198
2199
C
D
11
2200
D
11
2203
A
Question
The brake horsepower of a centrifugal pump will vary
directly as the __________.
Answer B
square of the
diameter of the
impeller
Answer C
Answer D
cube of the diameter impeller efficiency for
of the impeller
large changes in the
size of the impeller
In the illustrated schematic, the device used to replace "A"
the six-way valve, as found on many older type steering
gears, is the component labeled as __________.
"B"
"F"
Which type of Marine Sanitation Device (MSD) is used
solely for the storage of sewage and flush water at
ambient air pressure and temperature?
Any unusual, or new vibration in the hull or propeller
shafting can be an indication of __________.
Type I
Type II
clutch slippage
overheated bearings high engine speeds
propeller unbalance
A reheater in an air conditioning system functions to
__________.
control inlet air
temperature
control inlet air
volume
maintain relative
humidity at 15%
restore conditioned
air temperature to a
comfortable level
Oiling a file as a rust preventative may cause
__________.
For cutting cast iron or soft steel, the proper hacksaw
blade should have __________.
An air tank rusts out, explodes and causes $(USA)
24,000 damage to the engine room. By law, this
accident is required to be reported to __________.
overheating
pinning
fast cutting
binding
14 teeth per inch
18 teeth per inch
24 teeth per inch
32 teeth per inch
the owner or his
agent
the insurance
underwriter
no one
the U.S. Coast Guard
If the suction pressure increases to a capacity
controlled compressor used in a multi-box refrigeration
system, the actions of the unit shown in the illustration
should cause __________.
"H" to move away
from "I", the pressure
in "M" to drop, "K" to
move down, and "V"
to move "S" upwards
"H" to move towards
"I", the pressure in
"M" to increase, "K"
to move down, and
"S" to move down
against the force of
"V"
"H" move away from
"I", the pressure in
"R" to decrease,
allowing "S" to move
down against the
force of "V"
"H" to move towards
"I", the pressure in
"R" to increase,
forcing "S" to move
down against the
force of "V"
In the device shown in the illustration, what is the
function of item "6"?
It senses
temperature for use
in the temperature
control circuit.
It is used to maintain Both items of #6 are It is used to control
liquid level one inch anodes used to
the oil discharge
below item "8".
provide the tank with mode.
corrosion protection.
Fresh vegetables
Meat
Respiratory heat' is a term applied primarily to which of
the following cargoes?
Answer A
diameter of the
impeller
Illustr
"H"
GS-0123
156
Type III
Frozen vegetables
Type IV
All of the above
RA-0013
GS-0153
Book Num
Ans
11
2204
A
11
2205
C
11
2208
A
11
2210
D
11
2211
B
11
2213
D
11
2214
A
11
2215
C
11
2217
B
11
2218
C
11
2219
B
11
11
2220
2221
D
C
Question
To prevent the unnecessary loading of an air
conditioning system while maintaining the designed dry
bulb temperature and relative humidity in an air
conditioning system, you should __________.
Answer B
reduce the air
reheating system
load
Answer C
lower the
compressor head
pressure
Answer D
operate the purge
recovery unit
continuously
Which of the files listed will have coarsely spaced
Second cut
teeth?
If the signal input to 'P4' is 48psi, and the supply
0 psi
pressure is 50 psi, the output pressure at 'P1', as shown
in the illustration, will be equal to __________.
Dead smooth cut
Bastard cut
Smooth cut
10 psi
25 psi
50 psi
Screwdrivers designed for electrical use should have
__________.
Which of the files listed is produced with two safe
edges?
Which of the listed statements describes specific heat?
longer than normal
shanks
Mill
larger than normal
shanks
Pillar
shorter than normal
shanks
Half round
The amount of heat
required to change
the temperature of
one pound of a
material, one degree
Fahrenheit.
The amount of heat
required to change
the temperature of
one pound of ice,
one degree
Fahrenheit.
The amount of heat All of the above.
required to change
the temperature of
one pound of butter,
one degree
Fahrenheit.
To add refrigerant to the low side of an air conditioning
system, the refrigerant should be introduced through
the __________.
Which of the following devices is not considered to be a
pressure vessel? (46 CFR)
Which of the files listed is commonly referred to as a
'rattail' file?
Which of the screwdrivers listed is fastest and most
convenient when tightening many screws?
Which of the screwdrivers listed is designed for the
precision assembly of small parts?
You discover an air leak at the manhole cover shortly
after pressurizing a P-tank. You must __________.
Answer A
admit only enough
fresh outside air to
provide proper
ventilation
GS-0145
suction service valve suction service valve discharge service
as a vapor
as a liquid
valve as a vapor
insulated handles
Knife
charging valve as a
liquid
Low pressure
evaporator
Small half round
Deaerating feed
heater
Small round
Hydraulic fluid power Fuel oil heater
cylinder
Small triangular
Small flat
Square shank
Offset
Ratchet
Standard
Ratchet
Jeweler's
Allen head
Square-shanked
reduce the P-tank
pressure to 25-30 psi
to complete the dry
material transfer
increase the P-tank
pressure to the
unloading valve
setting to force the
manhole cover to
seat itself
complete the dry
material discharge
before attempting
any repairs
depressurize the
tank, replace the
gasket, then tighten
the bolts securing the
hatch cover
3.56 lb/min/ton
4.75 lb/min/ton
5.55 lb/min/ton
A refrigeration system is operating as a simple
2.56 lb/min/ton
saturated cycle with an evaporator temperature of 0° F,
and a 120° F condensing temperature. Using the table
shown in the illustration, determine the weight of the
refrigerant circulated through the system.
157
Illustr
RA-0023
Book Num
Ans
11
2222
D
11
2223
A
11
2224
C
11
2226
B
11
2227
D
11
2228
D
11
2229
C
11
2230
D
11
2231
D
11
2232
B
Question
What is the normal direction of flow through the device
shown in the illustration while operating in the
processing mode?
Answer A
The oily-water
mixture enters
through valve "14"
and exits with the
processed liquid
through valve "4".
Unusual hull, or propeller shaft vibrations can be
caused by __________.
excessive engine
speed in shallow
water
If a refrigeration compressor in a multi-box system runs high pressure switch
continuously, the cause might be a __________.
stuck in the closed
position
The barge shown in the illustration is 40' X 20' X 10'and 182.9 long tons
weighs 22.9 long tons when empty. The theoretical
maximum amount of machinery and cargo which may
be installed or loaded is __________.
The terms rough, coarse, bastard, second cut, smooth,
and dead smooth refer to the __________.
Answer B
The oily-water
mixture enters
through the pressure
control valve "2" and
exits with the
processed liquid
through valve "14".
Answer C
The oily-water
mixture enters
through valve "4" and
exits as processed
liquid through valve
"14".
Answer D
Illustr
The oily-water
mixture enters
through valve "5" and
exits the separator
through valve "14" as GS-0153
processed liquid.
slop in a hydraulic
clutch
high engine speed in
deep water
clogged mechanical
scale trap
slight overheating of
the line shaft spring
bearings
shortage of
refrigerant
205.6 long tons
228.8 long tons
243.3 long tons
defective thermal
bulb
GS-0157
distance between the size of the file
parallel cuts of a file
coarseness of file
teeth
both A and C are
correct
By which of the listed methods may heat be transferred Radiation
from one body to another?
Which of the screwdrivers listed is designed with the
Square shank
shaft made from double coil wire or tightly coiled steel?
Convection
Conduction
All of the above
Ratchet
Flexible shaft
Jeweler's
A file coated with oil and stowed away will __________. cause the file to
overheat
cause the file to slide
across the work and
prevent fast, clean
cutting
4.75 cu ft/min/ton
cause dust and metal both B and C are
particles to collect in correct
the teeth
Determine the volume of vapor compressed per minute 1.07 cu ft/min/ton
per ton in a simple saturated refrigeration system using
the table shown in the illustration. The evaporator
temperature is 0° F, with a condensing temperature of
120° F.
The length of a file is always measured exclusive of the edge
__________.
158
6.39 cu ft/min/ton
7.77 cu ft/min/ton
RA-0023
tang
point
heel
Book Num
11
2235
Ans
2236
A
11
2237
D
11
2238
B
11
2239
B
11
2240
A
11
2241
C
11
2243
A
11
2244
C
11
2245
2248
Answer A
Heat the bulb by
using a halide torch
or similar device and
observe the valve
stem movement.
Answer B
Remove the power
head from the unit,
heat the bulb with a
torch while using a
scale to measure the
distance the
diaphragm has
moved.
Answer C
Chill the bulb in ice
water while
observing the
compressor for an
increase in suction
pressure.
Answer D
Place the sensing
bulb in ice water and
then warm by hand.
Observe floodthrough and
temperature change
at the suction line.
An operating refrigeration system uses the device
shown in the illustration. The high pressure gage
indicates an abnormal decrease in the head pressure.
The probable cause can be related to __________.
fouling of the unit
labeled as "I"
item "M" being
screwed up to the
stops
component "E"
having backed off
from its seat
component "H" has
exceeded its elastic
limit
Round
Square
Triangular
Reed and Prince
Allen
Torx
18 teeth per inch
24 teeth per inch
32 teeth per inch
200° F (93° C)
212° F (100° C)
300° F (149° C)
315° F (157° C)
4.75 BTU/lb
8.25 BTU/lb
16.79 BTU/lb
Rod
Hardened
Flexible
The correct answer is
not obtainable due to
the insufficient
RA-0023
quantity of data
given.
None of the above
D
11
11
Question
Which of the following statements describes the
accepted method for testing a thermostatic expansion
valve?
A
C
Which of the files listed is tapered on three sides and is Mill
used to file acute internal angles?
Which of the screwdrivers listed is produced with a tip
Standard
to fit screws with a four way or cross slot?
To cut drill rod, light angle iron, or tool steel with a hand 14 teeth per inch
hacksaw, it is best to use a blade with __________.
What is the lowest permissible flashpoint of the oil used
in a hydraulic valve actuating system that operates at
145 psi (1000kPa)? (46 CFR Part 58)
In a simple saturated cycle refrigeration system, the
enthalpy of the vapor after compression is 95 BTU/lb.
with an evaporation temperature of 0° F. Which of the
listed values represents the heat of compression per
pound of refrigerant circulated?
Which of the saw blades listed, when mounted in a
hand held hacksaw frame, will cut on both the forward
and reverse strokes?
Any air mixture whose dew point remains constant will
also have an unchanging __________.
A fluid power system shall be so designed __________.
dry bulb temperature wet bulb temperature specific humidity
that proper
functioning of any
unit shall not be
affected by the back
pressure in the
system
A simple saturated refrigeration cycle is operating with a 11.94 BTU/lb
120° F condensing temperature and a 0° F evaporator
temperature. Using the table provided, determine the
refrigeration effect per pound of refrigerant in
circulation.
159
Illustr
RA-0015
specific volume
to maintain a back
pressure throughout
the power cylinders
operating range
such that the
none of the above
operation of any unit are correct
in the system will
provide for sufficient
back pressure
81.9 BTU/lb
42.05 BTU/lb
44.41 BTU/lb
RA-0023
Book Num
Ans
11
2249
D
11
2250
B
11
2251
B
11
2252
C
11
2253
A
11
2254
A
11
2255
A
11
2256
D
11
2257
B
11
2259
C
11
2260
B
Question
Answer A
If item "1" in the illustrated oily water separator indicates Process water inlet
an abnormally high vacuum, which of the following
valve, item "5", is
conditions is the most probable cause?
open.
Answer B
Coalescer beds are
severely fouled.
Answer C
Answer D
No problem exists as Suction line inlet
a high vacuum
strainer is
should be maintained obstructed.
in the chamber
whose vacuum is be
measured.
A hacksaw blade with 14 teeth per inch should be used
to cut __________.
Which of the files listed will have medium spaced teeth
and is used for general work?
Which of the files listed is tapered on all sides and used
to enlarge rectangular-shaped holes and slots?
angle iron and heavy cast iron and soft
pipe
steel
Dead smooth
Second cut
thin tubing or sheet
metal
Bastard cut
drill rod and tool
steels
Smooth cut
Round
Half round
Square
None of the above
A refrigerated container filled with 10,000 lbs. of
strawberries has been loaded on your ship. The set
point of the box is 35° F and the interior box
temperature is 90° F, and after 7 hrs. 37 minutes the
box is lowered to 60° F. Based on the following
information, which of the listed steps should be taken?
[Specific Heat of cargo is 0.94 BTU/lb/ ˚F, heat gain by
container equals 4000 BTU/hr, and refrigeration
capacity = 3.42 tons]
Do nothing as the
system is operating
correctly.
The compressor is
Replace the liquid
worn out and should line strainer.
be replaced.
The dew point is reached when the wet bulb
temperature is __________.
equal to the dry bulb twice the dry bulb
temperature
temperature
100° F less than the 50° F above the dry
dry bulb temperature bulb temperature
the suction line will
be hot due to a
reduced amount of
refrigerant returning
to the compressor
the temperature of
the refrigerant within
the condenser will
remain the same
the temperature of
the refrigerant
passing through the
subcooler will
decrease
The ball float shown in the illustration is 12 inches in
120 inch pounds
diameter, with an effective float arm of 35 inches and
floats in a liquid with a specific gravity of 0.5. What is
the available operating torque?
Using a file without a handle may result in __________. your work becoming
rounded
A new file should be broken in carefully by filing a piece monel stock using
of __________.
heavy pressure
200 inch pounds
240 inch pounds
280 inch pounds
The edge of a file not having any teeth is known as a
__________.
160
GS-0153
Add Freon to the unit
to increase the
refrigeration effect.
If the superheat value of a thermostatic expansion valve the suction line will
is set too low, the __________.
be abnormally cold
and liquid may slug
back to the
compressor
smooth edge
Illustr
GS-0158
injury to your hand
pinning
brass stock using
heavy pressure
overheating of the
file
bronze stock using
light pressure
safe edge
flat edge
dead edge
stainless steel stock
using light pressure
Book Num
Ans
11
2261
B
11
2263
B
11
2264
C
11
2265
2266
A
11
2267
D
11
11
2269
2270
2271
Answer A
78.21 BTU/min/ton
A
A
D
Answer B
79.75 BTU/min/ton
Answer C
90.15 BTU/min/ton
Answer D
95.00 BTU/min/ton
Illustr
A saw blade produced of bonded tungsten-carbide
particles and mounted in a hacksaw frame is known as
a __________.
In the refrigeration system shown in the illustration, part
"K" is the __________.
If a thermostatic expansion valve is adjusted for too
high a superheat value __________.
wave set blade
rod saw blade
hardened blade
flexible blade
compressor
condenser
expansion valve
evaporator
all of the system
liquid will flow to the
evaporator coil
an insufficient
amount of liquid will
be fed to the
evaporator
an excessive amount only the required
of liquid will be fed to amount of refrigerant
the evaporator
will enter the
evaporator
regardless of the
required superheat
value
36
The ball float shown in the illustration is 9 inches in
diameter and is floats in a liquid with a specific gravity
of 0.9. If the effective length (EL) is 18 inches and "L" is
3 inches, how many pounds of force will be available at
"X" if there is no mechanical loss?
108
162
Pinning is often caused by __________.
dropping the file
chalking the file
cleaning the file
Which of the items listed is used to prevent over
pressurization in the device shown in the illustration?
Item "2"
Item "14"
Item '16'
bearing too hard on
the file
This device is never
exposed to excessive
GS-0153
internal pressures.
Which of the following conditions will occur if the power The valve will move
element of a thermostatic expansion valve fails?
towards the closed
position.
The valve will begin
to close, but the
external equalizing
line will assist in
keeping the valve
unseated.
The valve will fail
open as designed to
provide continuous
cooling.
The valve will fail
open and the cooling
capacity will be
RA-0007
increased.
Which of the following represents the primary cause of The reduction of
the pressure drop between points A and A', as shown in pressure is due to
the illustration?
the decrease in
velocity of the liquid
refrigerant leaving
the receiver.
The condensing of
the flash gas causes
the volume to be
decreased thereby
reducing the
pressure.
The adiabatic
expansion causes an
isentropic effect on
the liquid.
The pressure drop is
a result of the
frictional loss of the
liquid flow through
RA-0022
the receiver and the
liquid line.
RA-0023
B
11
11
Question
In a simple saturated cycle refrigeration system, the
enthalpy of the compressed gas is 95 BTU/lb and the
weight of compressed vapor is 4.75 lb/min/ton,
operating at an evaporation temperature of 0° F, and a
condensing temperature of 120° F. Using the data
RA-0012
324
GS-0158
161
Book Num
11
11
2272
2273
Ans
A
B
Question
Answer A
It is not necessary to 'chalk' a file when the metal being steel
filed is __________.
Which of the saws listed would be more suitable for
Coping saw
cutting metal in tight quarters or flush to a surface
where a hand held hacksaw frame could not be used?
The function of a heat interchanger used in a
refrigeration system is to __________.
11
11
2274
2275
D
B
11
2276
C
11
2277
C
11
11
11
11
2279
2282
2283
2284
C
D
B
B
According to regulations (46 CFR), who may grant an
extension of the tail shaft examination interval?
In a refrigeration system, the valve shown in the
illustration is used as a __________.
It is necessary to 'chalk' a file when the metal you are
filing is __________.
What is the theoretical time necessary to reduce the
temperature of 40,000 pounds of onions (placed in a
refrigerated container) from 75° F to a set point
temperature of 46° F? [The specific heat of onions is
0.90 BTU/LB/° F. The trailer heat gain is 6,500 BTU/hr,
with a properly operating refrigeration cooling capacity
of 45,000 BTU/hr]
Which of the relays shown in the illustration may be
used to replace the relays used to energize the
compressor contactor and the evaporator fan high
speed contactor?
lower the
temperature of liquid
refrigerant before
entering the
expansion valve
Officer in Charge,
Marine Inspection
office
lead
Answer D
aluminum
Stab saw
Back saw
Hole saw
Answer C
Commandant (GMOC)
Authorized
Representative of the
American Bureau of
Shipping
pressure actuated,
condenser cooling
water regulating
valve
aluminum
Official
Representative of the
Naval Pollution
Control Office
gas pressure
reducing valve
13 hours 16 minutes 26 hours 48 minutes 52 hours 12 minutes
The relays labeled
'K1' and 'K6',
provided a suitable
jumper is used.
The relays labeled
'K1' and 'K4', the
latter relay not being
necessary for frozen
loads.
The relays should
never be exchanged
due to very
distinctive current
and power ratings for
each.
blocks of wood
pieces of sand paper pieces of cloth
should turn valves
must first remove the should examine the
slowly to avoid
seal cap
gasket frequently to
thermal stresses due
ensure that it is flat
to low temperatures
RA-0014
monel
6 hours 5 minutes
162
Illustr
reduce the possibility minimize sweating of All of the above.
of liquid refrigerant
the suction line
from flooding back to
the compressor
thermostatic,
thermostatic, back
pressure regulator
evaporator,
refrigerant regulating
valve
mild steel
stainless steel
When cutting sheet metal too thin to be held in your
blocks of steel
hand while using a hand held hacksaw, the sheet metal
should be placed between two __________.
When opening or closing compressor service and line
valves on a typical refrigeration system, you
__________.
Answer B
copper
All of the relays
indicated in the
microprocessor are
interchangeable,
however, in this case RA-0020
replace K7 with K6.
should never tighten
the packing gland
Book Num
Ans
11
2286
A
11
2287
B
Question
Answer A
The set point adjustment of the device shown in the
"A"
illustration is made by rotating __________.
While filing, you can prevent pinning by keeping the file light oil
clean and rubbing the teeth of the file with __________.
11
2288
B
An obstructed expansion valve may be indicated by an
incompletely cooled evaporator and __________.
a higher than normal frosting at the
discharge pressure evaporator inlet
11
2289
C
The dashed line to the illustrated pump is the
__________.
pump relief valve
outlet to the sump
11
2290
B
The components indicated as "7" and "8" as shown in
the illustration, are known as the __________.
outlet weir and outlet inlet weir and inlet
baffle
baffle
Which of the following statements describes the
thermodynamic changes to the refrigerant occurring
between points C' and C'', as shown in the illustration?
The specific volume
is decreasing as a
result of an apparent
reduction in pressure
developed by the
displacement volume
of the compressor.
The specific volume
is increasing along
with a reduction in
pressure resulting
from the flow of
refrigerant through
the suction piping.
Mill files are always __________.
Which term applies to a hacksaw blade having short
sections of teeth bent in opposite directions?
double cut
Alternate
single cut
Double alternate
If a liquid drying agent is used in a refrigeration system
already equipped with a solid drying agent, the liquid
drying agent will __________.
release the moisture react violently with
cause toxic gases to solidify the
already trapped in
the solid drying agent form in the
refrigerant oil in the
the solid drying agent
refrigerated space
compressor
crankcase
Sprocketed keyway Stress relief grooves Keyway is to be cut All of the above.
and slotted key.
at the forward end of so as to give a sharp
the propeller and aft rise from the bottom
end of the liner.
of the keyway to the
shaft surface.
11
2291
B
11
2292
B
11
2293
D
11
11
11
2294
2295
2296
A
B
B
One of the determining factors regulating the time
interval for drawing a vessel's tail shaft depends upon
the design to reduce stress concentrations. Which of
the following factors, in part, would be considered to
meet this design criteria?
According to Coast Guard regulations (46 CFR) lamp,
paint and oil lockers, and similar compartments shall
__________.
suitably insulated
from any woodwork
or other combustible
matter
163
Answer B
Answer C
Answer D
Illustr
"B"
"D"
"H"
chalk
talc
graphite
a decrease in the
amount of frosting
across the drier
casing drain
frosting at the suction
side of the
compressor
system replenishing
line
GS-0049
first stage oil
separator and drip
pan
The entire process
can be
mathematically
explained by the
PASS system of
analytical
thermodynamic
procedures.
second stage oil
separator and drip
pan
None of the above
describes the
changes that are
occurring.
Swiss patterned
Rake
second cut
Wave
pump capacity
control feedback loop
be constructed of
steel or shall be
wholly lined with
metal
not be located at the
end of a corridor in
excess of forty feet in
length
RA-0014
GS-0153
RA-0022
be so arranged to
prevent excessive
movement of its
contents during
periods of foul
weather
Book Num
Ans
11
2297
D
11
2298
A
11
11
11
11
2299
2300
2301
2303
D
Question
Double cut files are used for __________.
Answer B
finish work
Answer C
rough work
Answer D
both A and C
Which of the files listed will have closely spaced teeth
for finishing to a smooth surface?
Your vessel has received a refrigeration container of 16 Saturday at 0012
long tons of cabbage, loaded at 1700 hours on Friday, hours.
with a beginning temperature of 80° F. At what time on
Saturday will the box theoretically reach its set point
temperature of 50° F, assuming the system is operating
correctly? [Specific Heat of cabbage is 0.94 BTU/lb/ ˚F.
The container has a heat gain of 6000 BTU/hr, and the
refrigerating system capacity is 40,000 BTU/hr.]
Bastard cut
Second cut
Rough cut
Saturday at 0724
hours.
Saturday at 1242
hours.
Saturday at 2242
hours.
If an expansion valve is adjusted for too low a
superheat value __________.
the refrigeration
effect will increase
contributing to
uncontrolled box
temperatures
the flow of the
the flow of the
the flow of the
refrigerant through
refrigerant through
refrigerant through
the cylinder heating
the passages and
the liquid line
solenoid
suction valves of the device
compressor
water hammer action fluid friction
steam knock
B
C
A
2304
the efficiency of the too much liquid will
unit will be increased be passed back to
the compressor
The apparent pressure drop between points C'' and C''', the flow of the
as shown in the illustration, is a result of __________.
refrigerant through
the dehydrator
Reduced capacity, accompanied by vibration and noise vapor pockets
at the suction of a centrifugal pump, results from
cavitation in the fluid being pumped. Cavitation
describes the formation of __________.
Overcharging an air-cooled refrigeration system will
cause the __________.
11
Answer A
quick removal of
metal
Smooth cut
relief valve to lift
The actual position of the needle valve in the device
The pressure
shown in the illustration is dependent upon which of the developed as the
following conditions?
liquid flows through
the expansion valve.
11
2305
B
164
the box temperature
will increase causing
an expansion of the
volume of air
compressor to run
continuously
system to
compressor to short
automatically change cycle
over to the hot gas
defrost cycle
The effects of the
pressure developed
in the sensing bulb
opposed in part by
the pressure acting
against the
diaphragm provided
by the equalizing
line.
The force of the
valve spring only.
D
Illustr
RA-0022
The amount of
superheat added to
the gas discharged
to the condenser.
RA-0007
Book Num
11
11
11
2306
2307
2308
Ans
B
C
A
11
2309
C
11
2310
C
11
2311
D
11
2312
D
11
2313
C
11
2314
Question
Which of the problems listed could happen if you
attempted to force open a valve 'frozen' in position by
using a wrench on the hand wheel?
The ball float shown in the illustration is 9 inches in
diameter, with an effective float arm of 27 inches and
floats in a liquid with a specific gravity of 1.0. How much
operating torque will be available?
Archimedes' principle states that the resultant pressure
acting on a body immersed in a fluid __________.
B
Answer A
Bending of the
bonnet assembly
Answer B
Answer C
Bending of the valve Damage to the
stem
pressure seal
Answer D
Distortion of the
valve body
120 inch pounds
143 inch pounds
243 inch pounds
GS-0158
acts vertically upward
through the center of
gravity of the
displaced fluid and is
equal to the weight of
the fluid displaced
What device shown in the illustration is used to prevent An automatic valve,
excessive internal pressures within the unit during its
item #14 opens to
prevent excessive
operation?
pressure.
When mounted in a hand held hacksaw frame, which of
the blades listed could cut smoothly through a metal
file?
As shown in the illustration, point D'' is slightly higher
than point D'. This difference is representative of
__________.
180 inch pounds
Illustr
will cause the body
to have a reduction
in mass equal in
magnitude to the
effective mass of the
structure located
above the line of
floatation
is proportional in
magnitude and
direction, regardless
of the direction
originally developed
when the object was
submerged
is applied equal and
in all directions
throughout the
vessel in which it is
contained
This device is never
A rupture disc, item Internal tank
#16 ruptures causing pressure overcomes exposed to excessive
internal pressures.
the pressure to drop. the spring force in
GS-0153
item #2 causing it to
open.
Wave set
Hardened
the higher degree of
superheat absorbed
during the
compression process
an esoteric condition
of the refrigerant
during adiabatic
contractions
Rod
Flexible
the additional
pressure found in the
system due to
normal amounts of
air
Which of the following statements represents the
The contacts shown When phase
The programmed
function of the power factor correction capacitors (PCC) at PCC are only used sequence anomalies circuit control
shown in the illustration of the refrigeration system
for reversing the
exist, the PCC is
functions to maintain
controller?
compressor rotation used to automatically the high starting
if the phase
remove all inductive torque required for
sequence of the unit loads from the
refrigeration
is incorrect.
compressor motor.
compressors.
the additional
pressure required to
force the discharge
valves open
Which of the valves listed for the device shown in
valve "4"
illustration will be open while the unit is operating in the
back flush mode?
Which of the listed components, shown in the
J
illustration is designed to close when the refrigerant low
side pressure reaches its upper normal limit?
valves "4", "5", and
"14"
165
valves "4" and "5"
E
valves "4" and "14"
F
RA-0022
The capacitors lower
the current drawn by
the compressor drive
motor and effectively
lowers the total
RA-0020
current drawn by the
unit.
GS-0153
I
RA-0005
Book Num
11
11
2315
2316
Ans
C
11
2320
B
11
2322
Answer B
Independent remote
control of pitch is to
be provided at or
near the oil
distribution box.
Tests of its operation
are to be performed
in the presence of
the Surveyor.
Answer C
After installation in
the vessel, the
complete piping
system is to be
subjected to a
hydrostatic test equal
to 1.25 times the
design pressure.
Answer D
The arrangement of
piping is to be such
that a single failure in
one part of the piping
or pump unit will not
impair the integrity of
the remaining parts
of the system.
According to Coast Guard regulation (46 CFR), an "A"
class division, bulkhead or deck shall be constructed
__________.
with approved
incombustible
materials and made
intact from deck to
deck and to shell or
other boundaries
of approved
incombustible
materials, but need
meet no
requirements relative
to the passage of
flame
that if subjected to
the standard fire test,
they would be
capable of
preventing the
passage of flame for
one half hour
that if subjected to
the standard fire test,
they would be
capable of
preventing the
passage of flame
and smoke for one
hour
58.84 BTU/min/ton
In a simple saturated refrigeration cycle, which of the
listed values represents the quantity of heat rejected by
the refrigerant circulated at the condenser? The
enthalpy of the compressed gas is 95 BTU/lb, with a
condensing temperature of 120° F and an
78.21 BTU/min/ton
279.86 BTU/min/ton
451.25 BTU/min/ton
A fine wire bristled brush used for cleaning files is called file brush
a __________.
The pressure drop of the refrigerant occurring to the
A' and B'
flow through the discharge line and condenser, shown
in the illustration, is represented by points __________.
file card
pulling brush
cleaning card
B' and C'
C' and D
D' and A
What is the function of the device labeled PSC shown in The pressure sealed
the illustration of the refrigeration system controller?
container (PSC) is
incorporated into the
controller to
environmentally
protect all overload
devices.
This device insures
the operator never
having to change the
connections within a
power supply plug.
The PSC is part of
All of the above.
the phase sequence
selector and is used
to ensure proper
rotation of all motors
utilized with this
system.
alternate
The type of tooth set on a hacksaw blade where the
teeth are continuously staggered with one to the left and
one to the right is known as __________.
double alternate
raker
wave
Relative humidity can be determined by using a
psychometric chart and a/an __________.
sling psychrometer
aneroid barometer
compound barometer
D
2319
2321
Answer A
A pitch indicator is to
be fitted on the
navigation bridge for
vessels 400 gross
tons and above.
D
11
11
Question
Which of the statements listed accurately applies to
controllable pitch propeller systems?
D
C
11
2323
A
11
2324
B
hydrometer
166
Illustr
RA-0023
RA-0022
RA-0020
Book Num
11
11
11
11
11
2325
2326
2328
2331
2332
Ans
Question
Answer A
A small obstruction at the thermostatic expansion valve Suction pressure
inlet will result in which of the following conditions?
fluctuation.
Answer B
Answer C
Hunting as indicated Expansion valves are
by fluctuations of the designed to pass
discharge pressure. small foreign
particles so no
adverse condition will
occur.
Answer D
Ice is the sole cause
of this and will soon
melt due to
superheat; no
adverse condition will
occur.
According to Coast Guard regulations (46 CFR), a "B"
class bulkhead shall be constructed __________.
of steel or equivalent
metal construction,
suitably stiffened and
made intact from
deck to deck and to
shell or other
boundaries
of approved
incombustible
materials, but need
meet no
requirements relative
to the passage of
flame
that if subjected to a
standard fire test,
they would be
capable of
preventing the
passage of flame for
one half hour
that if subjected to
the standard fire test,
they would be
capable of
preventing the
passage of flame
and smoke for one
hour
If the head pressure of a refrigerating system, serviced
by the device shown in the illustration begins to drop
below set point, which of the following statements would
hold true?
The outlet pressure
would be fed back
through "P" to
directly act upon the
upper surface of "H".
Component "C"
would be forced off
of its seat, allowing
the water pressure
via "J" to increase to
act upon and force
"H" down, causing
"F" to close.
As the feedback
pressure through "O"
would decrease, the
direct mechanical
linkage of "L", "C",
and "G" would cause
the main valve "F" to
close.
Component "C"
would be reseated,
allowing the increase
in the force acting
above "H" to reseat
RA-0015
the main valve "F".
A refrigeration system has a condensing temperature of 45.20 BTU/lb
110° F, with subcooling to 90° F, and an evaporator
temperature of 40° F, with the gas temperature to the
compressor suction at 70° F superheat. Using this
information and the chart shown in the illustration
determine the refrigeration effect per pound of
refrigerant circulated.
54.01 BTU/lb
70.74 BTU/lb
101.41 BTU/lb
The evaporator fans of the refrigeration system as
shown in the illustration are two speed. Which of the
following statements properly describes the factors
controlling the speed of the fans?
Two sets of
contactors vary the
operating voltages of
four winding
configurations,
allowing dual speed
capabilities for two
separate motors.
A
C
D
B
D
The fans will
exclusively operate in
the high speed range
when both the 'EFH'
and the 'EF'
operating coils are
energized.
167
Illustr
RA-0023
The evaporator
blower speed is
determined by the
output of the current
coil. As the
compressor load is
increased, the blower
speed is reduced to
eliminate electrical
overloading.
Evaporator blower
speed is determined
by the evaporator
return air sensor.
RA-0020
Book Num
Ans
11
2333
A
11
2334
D
11
2335
C
11
2336
B
11
2337
B
11
2338
D
11
2339
Question
The term referring to the amount or degree the teeth of
a hacksaw blade are pushed out or canted from the
blade center is known as __________.
11
11
2340
2341
2342
D
D
Answer C
choke
Answer D
blade cut
low relative humidity triple banded squirrel air circulation is a
is maintained
cage fans are used maximum
high relative humidity
is maintained
pump suction valve
The teeth of a file may 'clog up' with metal filings and
scratch your work. This condition is known as
__________.
If the input signal at 'P4' is 51 psi, and the supply
pressure is 50 psi, then the output pressure at 'P1',
shown in the illustration will be __________.
According to Coast Guard regulations (46 CFR Part 92),
a standard fire test is one __________.
C
C
Answer B
pitch
A lower thermostatic temperature setting will provide a
desired degree of comfort in a room where
__________.
The valve labeled "4", for the device shown in the
illustration, is the __________.
According to Coast Guard regulation (46 CFR), a "C"
class division, bulkhead or deck shall be constructed
__________.
If the superheat value of the thermostatic expansion
valve is adjusted too high the __________.
11
Answer A
set
oily water inlet
regulating valve
of approved
incombustible
materials, but need
meet no
requirements relative
to the passage of
flame
oil discharge valve
flow control valve
that if subjected to
the standard fire test,
they would be
capable of
preventing the
passage of flame for
one half hour
that if subjected to
the standards fire
test, they would be
capable of
preventing the
passage of flame or
smoke for one hour
binding
pinning
drawing
jamming
0 psi
25 psi
40 psi
50 psi
with approved
incombustible
materials and made
intact from deck to
deck and to shell or
other boundaries
Illustr
GS-0153
GS-0145
of many initial
operating tests
performed on newly
commissioned
boilers
which is used to
determine the flash
point of various
marine fuels
which develops a
series of time
temperature
relationships in a test
furnace
box temperature will rate at which
suction line of the
continually rise
condensation occurs compressor will be
on the evaporator
abnormally warm
coils will increase
A refrigeration system has an evaporating temperature 1.97 lb/min/ton
of 40° F, and the liquid is sub cooled to 90° F. Calculate
the weight of refrigerant circulated per minute per ton
using the table shown in the illustration.
2.41 lb/min/ton
If the amount of current flow through the operating coils CB2
of the various contactors, shown in the illustration,
increases above three amps, which of the circuit
breakers listed will trip?
CB3
2.82 lb/min/ton
in which all
emergency
firefighting and
related safety
equipment are tested
rate at which
condensation occurs
within the coils will
increase
3.70 lb/min/ton
RA-0023
CB4
none of the above
RA-0020
168
Book Num
11
2343
C
11
2344
D
11
2345
D
Question
Sawing faster than a rate of 40 to 50 strokes per minute
while using a hand held hacksaw will generally
__________.
In an air conditioning system, moisture is removed from
the air by __________.
What maintenance may be carried out on a
thermostatic expansion valve?
valve "4"
B
Which of the valves listed is connected to the suction
side of the pump used in conjunction with the device
shown in the illustration?
If the microprocessor shown in the illustration is
indicating the fault 'Defrost Terminated on Time Limit',
which of the following statements indicates the problem
and the action taken by the controller?
As no electric cycle
defrosting has
occurred, the
microprocessor
initiates the hot gas
defrost cycle.
As shown in the illustration, an increase in pressure in
the TXV equalizing line tends to __________.
close the expansion
valve
Which statement about calibrating a newly installed
thermostatic expansion valve is correct?
The procedure
requires a
refrigeration wrench
and a digital
thermometer to
measure box
temperature.
11
11
11
2346
2347
2348
Ans
C
A
11
2349
D
11
2350
B
11
2351
C
Answer A
sharpen the blade
Answer B
cause the blade to
cut faster
Answer C
dull the blade
Answer D
not change how the
blade cuts
filters
separators
ducted traps
dehumidifiers
The thermal bulb
may be recharged.
The rate action may
be increased.
The proportional
The inlet screen may
action may be varied. be cleaned.
valve "14"
valve "5"
A valve is not
required as the pump
is directly attached to GS-0153
the bottom of the
tank.
The three way valve The microprocessor The pneumatic relay
main contacts have
has not shifted and has terminated the
the microprocessor defrost cycle after 45 closed, causing the
unit to return to the
minutes of elapsed
automatically turns
cooling cycle.
on the electric heater time, not having
RA-0020
sensed a coil
elements.
temperature of 23.9°
C.
increase the delivery coincide with a
of refrigerant to the decrease in the
suction line
evaporator
temperature
No special tools are This procedure is
required as long as done at the factory
the solid state circuit with tools not
control panels are
available to a
functioning properly. mariner.
adversely affect the
operation of the
system
RA-0018
An accurate
thermometer and
suction pressure
gage are essential to
this process.
Which of the files listed can be used for sharpening a
A triple cut file.
A single cut file.
Any bastard cut file. Only a double
tool?
bastard cut file.
A refrigeration system has an evaporator temperature of 0.79 cubic ft/min/ton 1.97 cubic ft/min/ton 2.93 cubic ft/min/ton 3.70 cubic ft/min/ton
40° F and a refrigerant circulation rate of 3.7 lbs/ min/
ton. Using the table shown in the illustration, determine
the volume of gas being compressed.
169
Illustr
RA-0023
Book Num
Ans
11
2352
C
11
2353
C
11
2354
A
11
2355
A
11
2356
C
11
2357
B
11
11
11
2358
2359
2360
B
Question
Which of the listed procedures can be carried out to
insure that the modulation valve, shown in the
illustration, is opened completely?
When using a hand held hacksaw the correct maximum 10 to 20 strokes per
rate of speed for cutting should be __________.
minute
Routine maintenance on a Central Control Room
hermetically sealed air conditioning unit should include
__________.
When a thermostatic expansion valve is installed in a
container refrigeration system, the sensing bulb may
not require insulation if the bulb is installed
__________.
The type of tooth set on a hacksaw blade where every
third tooth remains straight, while the other two are
alternately set is known as __________.
The valve labeled "5", in the device shown in the
illustration is the __________.
Answer B
When the lift button
is depressed the
valve is held open
due to the action of
the indented cam
assembly.
Answer C
The valve may be
opened by opening
the circuit breaker
labeled CB1.
80 to 100 strokes per 40 to 50 strokes per
minute
minute
Answer D
The head of the
modulation valve
must be removed in
order to prevent its
residual magnetism
from drawing the
valve into a closed
position.
Illustr
RA-0020
70 to 80 strokes per
minute
changing the air filter recharging the
system
changing
renewing container
compressor lubricant vacuum
outside of the cooled in the cooled air
air stream
stream
on the tail end of the at the mid-horizontal
condenser outlet
level of a vertically
pipe
run tail coil
Alternate
Double alternate
Raker
pump suction valve
oily water inlet valve flow control valve
overboard discharge
regulating valve
GS-0153
Which of the following alarms and instrumentation is not Pitch indicator
required for a vessel incorporating a controllable pitch
propeller in its main propulsion system?
Low oil temperature
High oil pressure
Low oil pressure
Each pressure vessel containing refrigerants, which
may be isolated, shall be __________. (46 CFR)
subject to annual
hydrostatic tests to
be performed in the
presence of a marine
inspector
protected by a relief
valve set to relieve at
a pressure not
exceeding 110
percent of the
maximum allowable
working pressure of
the vessel
stored in an upright
position in addition to
being secured so as
to prevent accidental
release of the
refrigerant within a
confined space
protected by a relief
valve set to relieve at
a pressure not
exceeding the
maximum allowable
working pressure of
the vessel
The type of tooth set on a hacksaw blade where two
adjoining teeth are staggered to the right, then two to
the left, and continue to alternate in this manner is
known as __________.
Alternate
Double alternate
Racker
Wave
D
B
Answer A
The jacking device
not shown is utilized
to achieve this
desired effect when
the device appears
to be malfunctioning.
170
Wave
Book Num
11
11
11
2361
2362
2363
Ans
D
Question
In a typical refrigeration system, the liquid refrigerant in
the condenser is 90° F with an evaporator temperature
of 40° F. Using the table shown in the illustration,
determine the amount of heat absorbed by the liquid
flashing to gas.
If the microprocessor shown in the illustration indicates
a fault code representing 'Microprocessor Faulty', which
of the following conditions is indicated and what
corrective action should be taken?
A
D
Expansion valve maintenance should include which of
the following procedures?
Which of the installation steps listed is necessary for
the proper operation of the thermostatic expansion
valve?
11
11
11
2365
2366
2367
B
C
A
Answer A
5.23 BTU/lb
Answer B
6.67 BTU/lb
Answer C
7.33 BTU/lb
Answer D
11.7 BTU/lb
Illustr
RA-0023
The self checking
feature of the
microprocessor
locates a malfunction
due to a circuit or
component failure,
necessitating the
replacement of the
microprocessor.
If the unit initiates
such an alarm, the
unit is obviously
functioning correctly
and just needs to be
reset.
Cleaning of in-line
filters.
Ensuring that the
thermal bulb is in
good contact with the
suction line.
Clean outlet pipe and Clean off oxidation
from the surface of
secure bulb
tangential to the flow the suction line and
sensing bulb with
of refrigerant.
fine abrasive cloth.
This fault code does None of the above.
not exist and this
situation will never
occur due to
standard
manufacturing
criteria.
All of the above.
Checking that the
thermal bulb is in the
proper location.
Remove excess
lengths of the
sensing bulb
capillary tube from
the device to
increase sensitivity.
Heat shrink
insulating material
around the device
once the bulb has
been properly
secured.
Ultrasonic
examinations of the
propeller may be
performed in lieu of
required dry-docking
periods, provided
certified copies are
distributed to the
proper regulatory
bodies.
Which of the following statements is correct concerning A propeller may not
requirements for propellers?
be changed with one
of a different pitch
unless stress
evaluations are
supplied and
permission is granted
by a Marine
Surveyor.
When steel
propellers are used,
zinc anodes are to
be fitted on the
aftermost strut
bearing housing and
on the forward most
section of the rudder
assembly.
The exposed steel of
the shaft is to be
protected from the
action of the water by
filling all spaces
between the cap,
hub and shaft with a
suitable material.
When the oily water separator, shown in the illustration, The water level
is in operation and processing clear bilge water, what
should be located in
should be the internal water level?
the upper section of
the tank.
The water level
should be located in
the lower section of
the tank as controlled
by flow control valve
"14".
The water level in the No water level is
tank should be
maintained in the
slightly above the
tank.
upper coalescer bed
"9".
171
RA-0020
GS-0153
Book Num
11
11
11
11
11
2368
2369
2370
2371
2372
Ans
D
B
C
A
2373
A
11
2374
C
2375
B
Answer C
coalescer bed, item
"9"
Answer D
coalescer bed, item
"12"
29.92 psia
2.16 psig
Illustr
GS-0153
GS-0154
Which of the following statements is correct concerning
the regulations (46 CFR) regarding internal combustion
engine exhausts, boiler and galley uptakes, and similar
sources of ignition?
They shall be kept
clear of and suitably
insulated from any
woodwork or other
combustible matter.
All exhausts and
uptakes shall run as
close as possible to
the horizontal and
shall exit the
machinery space at a
point above the
highest load line.
The general
construction of the
vessel shall be such
as to minimize noise
hazards in the upper
machinery spaces.
This protection shall
be such as to be
capable of
preventing an
excessive
temperature rise in
the upper machinery
spaces.
The locking plates shown in the illustration are used in
many marine applications. Which figure indicates the
improper method for using these devices?
"A"
"B"
"C"
"D"
The compressor contactor assembly shown in the
illustration has burnt out. If all safety devices are
operating correctly, which of the following conditions
could be a probable cause?
Regarding the device shown in the illustration, what
would be the most probable cause if item "1" indicated
an unusually high vacuum while the oily water separator
was operating in the processing mode?
Low line voltage
supplied to the
system controller.
A
11
11
Question
Answer A
Answer B
Concerning the device shown in the illustration, which of valves, items "4" and weir, item "7"
the listed components would be removed or
"5"
disconnected last during cleaning and inspection of the
tank internals?
The differential height of the left hand side of the tube
4.32 psia
4.32 psig
from the zero mark to the open end for device "C" is
4.4". If the barometric pressure is 14.7 psia, and the "U"
tube contains mercury, what minimum pressure applied
to "A" would just force the liquid out of the tube?
GS-0156
Twenty amperes of
current flowing
through relay contact
'K7'.
An unusually high
An unusually high
vacuum indicates a vacuum is the result
restriction in the inlet of the flow control
piping.
valve '# 14' being
excessively throttled.
The latent heat of water vapor in air is dependent upon dry bulb temperature
the __________.
When replacing a thermostatic expansion valve sensing apply a light film of
bulb, it is necessary to __________.
oil to increase heat
transfer
172
Steady, continuous Excessive refrigerant
running for periods of in system.
RA-0020
12 hours or more.
An unusually high
vacuum is the result
of the coalescer beds
being installed in
reverse order.
This type of oilywater separator
always operates with
GS-0153
an unusually high
vacuum.
wet bulb temperature dew point
dry point
apply a light film of
oil to prevent
oxidation
carefully coat the
device with silicone
sealant to reduce the
effects of convective
cooling
apply a heavy
coating of grease to
function as a heat
sink
Book Num
Ans
11
2376
B
11
2378
D
11
11
11
11
2379
2380
2381
2382
B
Question
You are observing the operation of the oily-water
separator shown in the illustration. Item "1" initially
indicates a vacuum and a moment later indicates a
positive pressure. Which of the following statements
describes what has occurred?
Answer A
Answer B
The unit has just
The unit has just
begun the oily-water begun the oil
mixture processing
discharge mode.
mode.
Answer C
The unit is obviously
flooded and needs to
be drained to the
proper operating
level.
A hacksaw blade will break if __________.
the rate of cutting is
too great
the blade becomes
loose in the frame
too much pressure is all the above
applied to the blade
Hydraulic hose assemblies are permitted by 46 CFR to
be installed between two points of relative motion
__________.
provided proper
releasing
mechanisms are
available to enable
quick disconnect
capabilities
but shall not be
subjected to torsional
deflection under any
conditions of
operation
provided the entire
length of the device
is visible to the
operator at all times
to prevent the
formation of loading
stresses
If air is continuously allowed to enter the device shown
in the illustration while operating in the processing
mode __________.
the air will
accumulate in the top
of the unit and will be
manually vented off
using valve "2"
the accumulation of
air in the top of the
unit will be sensed as
oil by item "6" and
initiates the oil
discharge mode
the air will present no
problem to the
operation of the unit,
it is entrained with
the treated water and
is pumped overboard
the unit will prevent
this as the
associated pump is
normally controlled
with a level control
device
What is the primary function of the devices shown in the The transit washers
illustration?
transmit the rotary
motion of the cap
screw to the
actuating assembly.
These abrasion
resistors prevent
damage to the
surface around the
bolt holes when
tightening the bolts.
The grounding straps
help prevent
electrolysis by
improving the
conductivity between
the components.
The locking plates
are used to prevent
the fastening devices
from vibrating loose. GS-0156
The refrigeration system shown in the illustration utilizes
a modulation valve, providing suction modulation
capacity control, and produces some distinctive
operating characteristics. Which of the following
statements represents the peculiarities encountered
when operating this system?
The discharge
pressure will
moderate according
to the relative
movement of the
modulation valve to
limit excessive head
pressure.
Suction and
discharge pressures
may drop below
expected normal
readings when the
unit is in the power
limit or modulating
cool mode.
As the modulation
valve closes, the
contacts at PCC
close, reducing the
speed of the
RA-0020
compressor and
increasing the overall
operating efficiency
of the unit.
B
D
C
The operation of the
valve will always
cause compressor
crankcase frosting,
giving the impression
of heat loss and
operational
inefficiencies.
173
Answer D
The unit is operating
incorrectly and must
be secured
immediately.
Illustr
GS-0153
GS-0153
Book Num
Ans
11
2383
C
11
2384
C
11
2385
C
11
2386
D
11
2387
B
11
2388
C
11
2390
D
11
2391
D
11
2392
C
11
2394
D
11
2396
Question
Answer A
The vessel has received a refrigerated container loaded 6 hours 48 minutes
with 9 long tons of ice cream. The current box
temperature is 31° F but has a normal set point of
minus 10° F. Under ideal conditions how long will it take
to pull the box temperature down to set point, if the
equipment is operating properly? [Specific Heat of
cargo is 0.39 BTU/lb/˚F, with a container heat gain of
6000 BTU/hr, and a refrigeration system capacity of 3.5
tons]
Rather than design an infinite variety of valve sizes for
use as thermostatic expansion valves, some
manufacturers use __________.
Which of the following statements represents the last
step to be followed when replacing the power element
of the device shown in the illustration?
The ball float shown in the illustration has a
circumference of 18.85" and is used in water with a
specific gravity of 1.0. If 16 pounds of force is available
at "X", and the effective length of the float arm is 24
inches, what is the length of "L"?
The device shown in the illustration is a __________.
Answer B
7 hours 58 minutes
Answer C
8 hours 57 minutes
Answer D
9 hours 38 minutes
an adjusting cap to
a flexible diaphragm
meet the various size
differences
Replace all removed Calibrate the sensing
shrouding.
bulb.
internal restrictors of a feeler bulb with an
different sizes
adjustable pressure
line
Measure evaporator Remove all excess
tail coil superheat.
capillary tubing.
2.00 inches
2.75 inches
2.50 inches
Illustr
RA-0007
3.00 inches
GS-0158
relief valve
flushometer valve
hydro-kineter
The device shown in the illustration is used to
__________.
maintain proper
sanitary system
operating pressure
provide pressure
control flush water
relief in low pressure flow to toilets and
urinals
systems
back pressure
regulator
inject emergency
feed water into high
pressure vessels
The diaphragm orifice labeled "H", as shown in the
illustration is used as a/an __________.
Which figure shown in the illustration, is the nut lock
improperly used?
As shown in the illustration, the gage labeled "C"
contains mercury and both devices "B" and "D" indicate
'zero' units when exposed to atmospheric pressure. If
the pressure indicated on "A" is 16.2 psia, the
corresponding readings of the gages "B", and "
pressure reducer
check valve
injector
time delay
"A"
"B"
"C" and "D"
"C" and "E"
B = 2.1 psig, D =
450" H2O, h = 3"
B = 40.9 psig, D =
450" H2O, h = 3"
B = 1.5 psig, D =
41.59" H2O, h = 3"
B = 2.1 psig, D = 42"
H2O, h = 6"
Constant superheat is maintained at the evaporator
outlet of a refrigeration coil by a __________.
solenoid valve
low pressure cutout
switch
king valve
Water flow is established through the unit shown in the
illustration when __________.
"E" is moved from
the position shown
"A" is tilted off of its
seat
total force above "C" all of the above
is reduced below the
value of the total
force acting beneath
"C"
GS-0155
GS-0155
GS-0155
GS-0156
GS-0154
D
174
thermal expansion
valve
GS-0155
Book Num
11
11
11
11
11
2397
2398
2400
2401
2402
Ans
A
Question
Answer A
Answer B
Which of the following statements is correct concerning The tilting of "A" from Only by releasing "E"
the operation of the device shown in the illustration?
its seat releases the will the unit be able
pressure from above to shut itself off.
"C".
a thick solid line
dashed line having
alternating long and
short dashes
If water continues to trickle into the toilet bowl after the
device shown in the illustration has apparently closed,
the problem is likely due to __________.
"E" being stuck or
held in a position
other horizontal
a problem with "H"
that allows
continuous low flow
across the device
"A" being cocked into "C" having developed
a fully open position a warp or ripple at
the seating surface
GS-0155
When should the nut lock shown in the illustration, be
replaced with standard lock washers or other similar
devices used in the industry?
Flat locks are no
longer used in the
marine industry and
should be replaced
during the next
maintenance
procedure.
When torque values
of 25 foot pounds or
greater are being
used, replacement
with spring washers
is mandatory.
Bellvue washers are
the ideal substitute
for these locking
devices provided a
thread locking
adhesive is used.
The pressure applied to the instruments via port "A", as B = 1.3 psig D = 36
inches of H2O
shown in the illustration, is 16 psia. What will be the
equivalent pressure readings for "B" and "D"?
B = 16 psig D = 63
inches of H2O
B = 17.4 psig D = 42 B = 14.7 psig D = 32
inches of H2O
inches of H2O
During the operation of a large multi-box refrigeration
system, using a fixed capacity compressor, only two of
the five boxes are in the process of actively being
cooled. If two additional boxes were to be brought into
the cooling process simultaneously, the __________.
amount of subcooling low side pressure
via the condenser
would temporarily
would increase by
increase
approximately 5° F
D
A
11
2403
C
11
2404
B
Answer D
Illustr
The movement of "E"
will directly push "D"
in a smooth vertical GS-0155
motion.
Edges on objects not visible in the view shown are
represented in blueprints by __________.
C
D
Answer C
For the unit to be
activated, "A" can
only be moved
initially in line with
the axis of the unit.
dashed lines having
approximately equal
length dashes
high side pressure
would drop by 25 psi
at the beginning of
the cooling period
If a refrigeration system is overcharged with refrigerant, low suction pressure higher than normal
one result will be __________.
compressor head
pressure
175
increased system
operating efficiency
Hidden edges are
not represented
because they are
'hidden'.
Replacement with
another nut locking
device is
unnecessary.
low side pressure
would temporarily
decrease
short cycling on the
low pressure cutout
GS-0156
GS-0154
Book Num
11
11
2405
2406
Ans
D
2407
A
11
2408
B
11
2409
A
2410
Answer B
Determine the
suction/ discharge
temperature
differential and
multiply by the
constant of .0967.
Answer C
Multiply the travel of
the expansion valve
stem by the
conversion factor.
During the operation of a five box refrigeration system, remain the same,
using a fixed capacity compressor, two additional boxes with a decrease in
suction pressure
came on line with the two boxes already in the active
cooling process. At the beginning of the cooling period
for the two additional boxes, the operating conditions of
the system would require the quantity (flow rate) of
refrigerant to the compressor suction to __________.
increase, while
maintaining the
previous suction
pressure
remain the same with increase, with an
an increase in
increase in suction
suction pressure
pressure
The device shown in the illustration is used as a/an
__________.
air conditioning
proportional-plusreset, humidity/
temperature ratio
controller
B
multi-box back
pressure regulator
with accumulator
A
11
11
Question
Which of the listed statements describes the method
used to determine the amount of superheat to be
developed in the evaporator coil?
The compressor crankcase (suction pressure) is
sensed through the port in the illustration labeled as
__________.
A liquid is being transferred by a centrifugal pump. As
the liquid passes through the volute, its velocity
decreases and __________.
The watch engineer finds the cargo refrigeration
compressor has blown the shaft seal. In this situation,
he should __________.
Answer A
Note the evaporator
pressure, determine
corresponding
saturation
temperature, and
subtract it from the
temperature
measured at the
thermostatic
expansion valve
sensing bulb.
refrigeration
compressor capacity
unloading
mechanism
D
X
Answer D
Illustr
Subtract the
temperature of the
gas after the unit has
been pumped down
from its operating
temperature as
determined by the
RA-0016
evaporator test gage
during normal
operation.
combined box
temperature
thermostat and
thermal expansion
device
J
RA-0013
RA-0013
its pressure
increases
its pressure
decreases
secure the
pump the system
compressor at once down and isolate the
and close the suction leak
and discharge valves
A
176
the potential energy
decreases
the kinetic energy
increases
close the suction
valve, secure the
compressor, and
then replace the
shaft seal
tighten the shaft seal
packing to reduce
leakage, slow the
compressor, and
operate the
expansion valves by
hand until repairs
can be made
Book Num
11
2411
Ans
C
11
2412
B
11
2413
A
11
2414
B
11
2415
B
11
2416
A
11
2417
B
11
2418
B
11
2419
C
11
2420
C
Question
Answer A
It is necessary to replace a branch suction section of
2" (nominal size)
bilge system piping within the machinery space. The
schedule 40
machinery space is 100' in length and 85' in breadth.
The molded depth of the bulkhead deck is 25'. Which of
the listed pipe sizes should be used?
Answer B
3" (nominal size)
schedule 80
Answer C
4" (nominal size)
schedule 80
Answer D
5" (nominal size)
schedule 60
Illustr
If "A" were open to the atmosphere, as shown in the
illustration, the pressure gage would read zero and the
levels in the "U" tube would be equalized. If "D" is
manufactured to indicate inches of water, what will be
indicated reading of the diaphragm gage if the
atmospheric pressure is 14.7 psia?
D = 407.6 inches of
water
D = 0.0 inches of
water
D = 14.76 inches of
water
D = 27.73 inches of
water
Protective equipment to be used while carrying out
oxyacetylene welding should always include
__________.
When the refrigeration system compressor suction
pressure corresponds to an elevation in coil
temperature, a low pressure cutout switch is set to
automatically start the compressor. The normal
stopping point of the compressor is set by adjusting the
____
goggles
Which of the following statements represents the
information obtained by the indication on the gage
shown in the illustration?
The absolute
pressure of the
refrigerant
corresponding to the
saturation
temperature.
The corresponding
saturation
temperature of the
refrigerant to the
indicated gage
pressure.
The pressure of the
refrigerant and the
corresponding
superheat
temperature.
The indicated
pressure of the
refrigerant and the
RA-0016
saturation
temperature of water.
In an emergency, the electro-hydraulic steering units
can be directly controlled by the __________.
trick wheel
rapson slide
follow-up gear
receiver unit
Which nondestructive testing method is suitable for use Magnetic particle
in detecting and identifying a diameter subsurface void
in a six inch diameter stainless steel shaft?
Radiography
Ultrasonic
Dye penetrant
One function of the thermal expansion valve is to
__________.
act as a pilot from
the solenoid valve
regulate the amount
of refrigerant flow to
the coil
regulate the water
flow
turn the compressor
off and on
The safety heads of most large reciprocating
compressors used in refrigeration systems are held in
place by __________.
The device shown in the illustration is a __________.
discharge pressure
in the safety return
line
ball check valve
large Teflon gaskets heavy coil springs
tack welding on the
sides
lift check valve
piston check valve
GS-0154
ear plugs
cut-in point of the low low pressure cutout
switch differential
pressure cutout
switch
177
non-sparking tools
steel toe safety
shoes
high pressure cutout
cutout point of the
high pressure cutout switch differential
switch
swing check valve
GS-0056
Book Num
Ans
11
2422
B
11
2423
C
11
2425
C
11
2426
D
11
2427
C
11
2428
D
11
2429
A
11
11
11
2430
2432
2433
Question
Dry bulk material transfer to an offshore drilling rig has
just begun when you discover air leaks at the P-tank
manhole cover. You must __________.
Answer A
complete the
discharge before
attempting any
repairs
Regarding the hydraulic transmission illustrated, the "A" variable stroke motor
end is a __________.
The coil temperature measured at the expansion valve The filter drier needs
sensing bulb of an operating system is 33° F. The coil
to be changed to
pressure gage, similar to the device shown in the
increase the suction
illustration, indicates 25 psig. What adjustments or
pressure.
changes, if any, should be made to the system?
Answer B
de-pressurize the
tank, inspect, clean
and reseat the
gasket
fixed displacement
pump
The evaporator coils
need to be steam
cleaned or high
pressure washed.
Answer C
reduce the P-tank
pressure to 25-30 psi
to complete the
transfer
variable stroke pump
If the valve "A" on the pump illustrated is closed, the
__________.
packing will tend to
wear rapidly
shaft sleeve may
All of the above.
become excessively
worn
In hydraulics, the graphic symbol illustrated in Fig. A is
used to represent a/an __________.
What is the reading of the vernier micrometer caliper
scale shown in figure "A" in the illustration?
The reading indicated on a vernier micrometer caliper
scale is .8388 inches. Which of the figures illustrated
represents this reading?
While cleaning out a P-tank __________.
variable resistor
pump may loose
suction if the suction
is from below the
pump
expansion joint
spring
flexible mount
0.8158 inch
0.8228 inch
0.8358 inch
0.8388 inch
Figure A
Figure C
Figure D
Figure F
C
D
D
A pressure gage, similar to device "D" shown in the
illustration, is installed on the vessel's ventilation
system. The gage is indicating 30 inches of water
(7.465 kPa), but the accuracy of the gage is in doubt.
Using a piece of clear hose, you construct a simple Utube mercury manometer, similar to device "C"
illustrated. Once installed, the distance between levels
is 12.7 centimeters. How inaccurate is the existing draft
gage?
Answer D
place a burlap bag
around the leaking
manhole flange
fixed displacement
motor
The expansion valve The liquid line
should not be
strainer is obviously
adjusted, as the
fouled and needs to
degree of superheat be cleaned.
is within the
accepted range.
Illustr
GS-0057
RA-0016
GS-0070
GS-0068
GS-0091
GS-0091
provide a gas mask
when using
petroleum based
solvents for cleaning
standard tank safety
precautions are
unnecessary if the
manway hatch is off
provide properly
grounded and
electrically safe
portable lighting
use a combustible
gas indicator when
working in the tank
The gage reads
slightly lower, but the
inaccuracy is too
insignificant to be
concerned.
The draft gage is
correct when
acknowledging the
effects of absolute
pressure on the
system.
The existing draft
gage indicates a
pressure equal to
atmospheric
pressure.
The mechanical draft
gage is indicating an
error incorrect by 55
percent of the true
measured value.
In the illustrated device, what is the function of the short It senses
sensing element attached to "S" in figure "A"?
temperature for use
in the temperature
control circuit.
178
It is used to maintain Both sensing
It is used to control
liquid level one inch elements are anodes the oil discharge
below the wier plate. used to provide the mode.
tank with corrosion
protection.
GS-0154
GS-0113
Book Num
Ans
Question
At ambient temperature and atmospheric pressure, R12 is a/an __________.
The reading indicated on a vernier micrometer caliper
scale is .2928 inches. Which of the figures in the
illustration represents this reading?
The reading on the micrometer scale shown in figure "II"
in the illustration is __________.
What is the reading of the vernier caliper scale shown in
figure "F" in the illustration?
Which of the illustrated figures represents the use of a
right hand roughing tool?
Which chemical symbol represents ammonia?
If a vessel is not provided with duplicate service
systems, which of the systems listed will satisfy the
regulations if serviced by two pumps? (46 CFR)
Answer A
corrosive liquid
Answer B
flammable gas
Answer C
odorless gas
Answer D
superheated liquid
Figure B
Figure C
Figure E
Figure F
11
2434
C
11
2436
A
11
2437
D
11
2438
B
11
2439
C
11
2440
D
11
2441
D
11
2443
A
A centrifugal pump gradually develops insufficient
Replace the wearing Throttle in on the
discharge pressure. What corrective action is required? rings.
discharge valve.
B
refrigerant has too
differential pressure expansion valve
The low pressure cutout switch will cause the
expansion valve
freezes in the closed much oil in
compressor in a refrigeration system to short cycle if the thermal bulb loses its between the cut-in
circulation
pressure and cutout position
__________.
charge
pressure is too small
11
2444
If the "B" end of the hydraulic transmission illustrated,
were provided with a variable position tilting box, and
the 'A: end displacement were to be constant, the
__________.
11
2445
A
11
2446
A
11
2447
D
Illustr
GS-0091
0.321 inch
0.350 inch
0.351 inch
0.371 inch
1.719 inch
1.723 inch
1.812 inch
1.871 inch
Figure P
Figure S
Figure T
Figure V
AM3
Main condensate
AMn3
Fuel oil service
NM3
Lube oil service
NH3
All of the above
Replace the lantern
rings.
Throttle in on the
suction valve.
speed output of the
"B" end would
increase in
proportion as the
tilting box angle
would approach zero
Which piping material is recommended to be used in
Steel
extra heavy duty sizes in ammonia refrigeration system
construction?
When cleaning out a P-tank __________.
it will be necessary to
use approved
petroleum base
solvents and a gas
mask
179
GS-0095
GS-0092
GS-0090
available horsepower
at the "B" end would
increase in
proportion as the
tilting box angle
would approach zero
stroke
speed output of the
"B" end would
increase in
proportion to
increasing the "B"
end tilting box angle
available horsepower
at the "B" end would
increase in
proportion to
decreasing the angle GS-0057
of the "B" end tilting
box towards zero
Monel
Bronze
Copper
a combustible gas
indicator must be in
use during the
cleaning process
standard tank safety
precautions are not
necessary when the
manway is open to
provide light and
ventilation
provide a safety
harness that permits
an unconscious
person to be pulled
out through the
manway
Book Num
Ans
11
2448
B
11
2449
C
11
2451
C
11
2452
C
11
2453
C
11
2454
D
11
2455
B
11
2456
D
Question
Answer A
What is the reading of the vernier caliper scale shown in 3.7850 inch
figure "B" in the illustration?
If your skin comes in contact with liquid ammonia
contact physicians
refrigerant, you should immediately __________.
health care
Answer B
5.3700 inch
apply an antibacterial flush the affected
ointment
area with water
remove all necessary
clothing
It is necessary to test the hydraulic system of a
controllable pitch propeller. According to 46 CFR what
should be done?
The vessel must be
dry-docked and the
propeller removed
when performing this
test.
The system pressure
should be prevented
from exceeding the
maximum allowable
operating pressure
set forth by the
manufacturer.
The system should
be tested at a
pressure of 1 1/2
times the maximum
allowable pressure.
All necessary repairs
must approved by
the Chief Engineer of
the vessel.
Using the information given, solve for "H", "I", and "J" in
the table accompanying the psychometric chart shown
in the illustration.
Which materials should be used for ammonia
refrigeration system evaporator cooling coil
construction?
When checking the oil level in a refrigeration
compressor, the most accurate reading is obtained
__________.
H = 33.0 BTU/lb, I =
15.5 cubic ft/lb, J =
.0127 lbs/lb
Copper tubing with
copper fins
H = 33.0 BTU/lb, I =
13.97 cubic ft/lb, J =
78.0 grains/lb
Copper tubing with
aluminum fins
H = 34.1 BTU/lb, I =
13.97 cubic ft/lb, J =
88.0 grains/lb
Aluminum tubing with
copper fins
H = 34.1 BTU/lb, I =
14.97 cubic ft./lb, J = RA-0021
98.0 grains/lb
All of the above may
be used.
immediately after
purging
immediately after
charging
after being secured immediately after
for 3 hours with the shutdown following a
sump heater secured prolonged period of
operation
If an evaporator or condenser coil of a container
refrigeration system becomes dirty and requires
cleaning, one of the suggested methods is to use the
__________.
Ammonia is lighter than air and if a leak should occur its
concentration will be __________.
When cleaning a P-tank __________.
11
2457
A
The illustrated device is used to __________.
11
2458
B
Answer C
5.8050 inch
Answer D
6.3700 inch
Illustr
GS-0092
'Binks' gun with weak pressure wash or a
acid solvent
steam cleaning
system
copper wire rotary
brush
all of the above
lower near the top of dependent upon
an enclosed space
available free
hydrogen ions
wear a dust mask to only use approved
filter out mud and
petroleum based
cement particles
solvents
of minimum
importance during
venting procedures
it is not required to
use standard tank
safety procedures
lower near the deck
of an enclosed space
force a uniformly
heated sample of oil
by applied pressure,
through the bottom
orifice with in a
specified time
determine the
temperature at which
vapors are produced,
ignited, and
extinguished
measure the volatility
of an oil sample, by
determining the
resulting pressure as
the volume of vapor GS-0069
is continually
increased
180
allow a uniformly
heated 60 c.c.
sample of oil to
gravitate through the
bottom orifice, using
the time as a
measurement
viscosity
an explosimeter must
be provided to test
the tank atmosphere
Book Num
11
2459
Ans
D
Question
The pressure in a high pressure refrigeration system
about to be opened for repair should be __________.
Answer A
1 to 2 psig
Answer B
4 to 7 psig
Answer C
11 to 12 psig
Answer D
0 psia
19.50° F
12.50° F
4.90° F
1.50° F
suction line solenoid thermostatic
expansion valve
liquid line box
solenoid
activated charcoal or special chemicals to
silica gel
increase adsorption
rates
refrigeration effect
unit will begin to
increases
subcool
activated alumina or all of the above may
silica gel
be used
vapor will cease to
condense
process of
sublimation will begin
pink
white
yellow
blue
the worker must be
provided with an
OBA
have a person
standing by on deck
a short length of rope
should be worn
around the waist to
pull the worker to
safety
butt weld
an explosimeter must
be provided to test
the tank atmosphere
11
2463
D
11
2464
C
The relative humidity is 90% and the dry bulb
temperature is 50° F. Using the information shown in
the illustration, determine the difference between the
dew point and wet bulb temperature.
The unit shown in the illustration has just been internally
cleaned. An inspection was carried out and the unit
found to be properly lined up, although item "1"
indicates an unusually high vacuum. Your next step
should be to __________.
The temperature in a refrigerated space is controlled by
adjusting the thermostat connected to the __________.
11
2465
C
Standard driers used in many container type
refrigeration systems may contain __________.
11
2462
D
11
2466
C
11
2467
B
11
2468
B
11
2469
C
11
2471
B
If the temperature of the ammonia gas in the discharge
piping and the condenser of a refrigeration system
remains above 266° F, the __________.
The flame of a sulphur candle in the presence of an
ammonia leak will turn __________.
When manually cleaning a P-tank __________.
Illustr
RA-0021
retighten all the cap
screws on the lid
reseat the relief
valve, item "2"
close off control
valve, item "14"
check the bilge water
inlet strainer
GS-0153
The type of welded joint illustrated is referred to as a/an socket weld
__________.
According to Coast Guard Regulations (46 CFR) an
device in which bilge
accumulator is a/an __________.
water may be stored
prior to being
pumped ashore
181
edge weld
unfired pressure
vessel in which
energy is stored
under high pressure
in the form of a gas
or a gas and a
hydraulic fluid.
industry accepted
term for the
equipment which is
used to collect oily
bilge liquids
low pressure cutout
switch
annulus weld
test procedure in
which the relieving
capacity of the safety
valves are verified
GS-0078
Book Num
Ans
11
2472
B
11
2473
A
11
2474
B
11
2476
B
11
2477
A
11
2478
D
Question
Sample #5 in the table shown in the illustration
indicates a relative humidity of 90%. Using the
accompanying psychometric chart, determine which of
the samples contains the greatest amount of moisture
per pound of dry air.
Which of the following devices is the safest to use when Litmus paper
locating ammonia leaks?
The water regulating valve installed in a refrigeration
compressor
system is operated by the __________.
discharge
temperature
Which of the following refrigerants will normally require R-134
water cooled compressor components?
The receiver used in a refrigeration system
stores liquid
__________.
refrigerant
Theoretically, if the "B" end of the hydraulic
transmission illustrated were provided with a variable
position tilting box, and the "A" end displacement were
to be constant, the __________.
2479
C
11
2480
D
11
2482
D
11
2483
D
11
2484
D
Answer B
Sample 2
Answer C
Sample 3
Answer D
Illustr
None of the above
are correct, as it is
contradictory to
measure moisture on RA-0021
a weight per pound
of 'dry' air basis.
Sulphur candle
Halide torch
compressor
discharge pressure
solenoid
All of the above are
recommended.
sensing line from the
tail coil
Ammonia
R-22
All of the above are
correct.
collects
allows refrigerant to prevents liquid
noncondensable
be subcooled
refrigerant from
gases
slugging to the
compressor
speed output of the available horsepower speed output of the available horsepower
at the "B" end would "B" would increase in at the "B" end would
"B" end would
increase in
proportion to
increase in
decrease in
proportion to the
increasing the "B"
proportion as the
proportion as the
GS-0057
tilting box would
end tilting box angle increasing angle of
tilting box would
the "B" end tilt box
approach zero stroke approach zero stroke
angle
Recirculation will not Satisfactory venting
be available at low
of the pump casing
flow.
would not be
possible.
The interval of
All of the above.
replacing the packing
will become more
frequent.
Average condensing pressures of an ammonia
refrigeration system range between __________.
Using the psychometric chart, which of the air samples
listed below has the identical specific volume to an air
sample having a dry bulb temperature of 70° F, and a
moisture content of 11 grains per pound of dry air?
120 and 160 psig
140 and 180 psig
150 and 190 psig
Dry bulb 72° F, Dew Dry bulb 63.0° F,
point 33.5° F.
Relative humidity
60%.
Dry bulb 69.0° F,
Heat content 23.25
BTU/lb.
Dry bulb 63.4° F,
Wet bulb 59.5° F.
An ammonia leak will turn moistened pink litmus paper
__________.
The thermal expansion valve reacts directly to the
__________.
orange
red
purple
blue
temperature in the
space being cooled
liquid refrigerant
pressure at the
solenoid valve
pressure drop across temperature of the
the evaporator coils evaporator coil outlet
What would occur if "A" shown on the illustrated pump
is closed?
11
Answer A
Sample 1
182
130 and 170 psig
GS-0070
RA-0021
Book Num
Ans
11
2486
A
11
2488
B
11
2489
C
11
2490
C
11
2491
D
11
2492
D
11
2493
B
11
11
2494
2495
C
B
11
2496
C
11
2497
D
11
2498
B
Question
Under normal conditions ammonia refrigerants should
be added at the __________.
Answer A
high side of the
system
Answer B
suction service
connection
Answer C
discharge service
connection
To service a 60 ton air conditioning package, the
easiest way to determine the type of refrigerant used is
to __________.
If a block and tackle arrangement were rigged as shown
in figure "D" in the illustration, the amount of force "P"
required to hold the 225 pound load stationary would be
__________.
Pure anhydrous ammonia is considered non-corrosive
to __________.
If auxiliary machinery vital to the main propulsion
system is not provided with independent duplicate
systems, which of the systems listed would satisfy
regulations if serviced by two pumps? (46 CFR)
The introduction of outside air to the air conditioning
system is 90° F with a relative humidity of 60%. The air
has been conditioned to 56° F with a relative humidity of
80%. Using the psychometric chart, shown in the
illustration, determine the quantity of moisture removed
from one pound of the conditioned air.
use your service
gage set and
refrigeration card
34 lbs.
look at the unit name ask the Chief
plate
Engineer
look on the top of the
TXV
45 lbs.
90 lbs.
75 lbs.
Answer D
expansion valve side
port connection
Illustr
GS-0110
iron only
steel only
Lube oil service
copper-bearing
metals
Fuel oil service
None of the above
are correct.
All of the above
Main condensate
44 grains
54 grains
64 grains
74 grains
RA-0021
When used as a refrigerant, ammonia containing
steel components
moisture will act as a corrosive mixture to __________.
brass and bronze
metals
stainless steel
components
All of the above are
correct.
When hot gas defrosting a refrigeration system, one
way to overcome the possibility of a large slug of liquid
refrigerant entering the compressor suction is to use the
installed __________.
If the combination moisture indicator and sight glass
indicates an accumulation of moisture within the
system, which of the listed procedures would be the
most practical to follow?
subcooler
liquid extractors
re-evaporator
drain lines
Secure the system,
disassemble and deice the thermostatic
expansion valve.
Close the king valve,
pump down the
system, isolate the
drier, remove and
replace with new
drier element.
Purge the entire
system to the
atmosphere, replace
the drier, and add
Freon.
Using a vacuum
pump, draw the
system down to
1,270 microns for a
period of three hours.
While the illustrated oily-water separator is operating in
the processing mode, if item "1" indicates higher than
normal absolute pressure, what is the probable cause?
The bilge suction is
completely flooded.
The flow control
valve "14" is
completely open.
The coalescer beads There is minor air
are severely fouled. leakage from the
pump discharge.
Which of the listed valves should be closed when
adding ammonia to a refrigeration system?
Which refrigeration system will require the use of an oil
trap?
Master valve
Suction service
Discharge service
King valve
Brine
Ammonia
Methyl Chloride
All of the above.
183
GS-0153
Book Num
Ans
11
2499
B
11
2500
B
11
2502
D
11
2503
Question
Answer A
The distillate pump for a 10,000 GPD evaporator,
5.9 gpm
should be rated at a minimum of __________.
Axial thrust of the pump shaft illustrated is compensated a balancing piston
for by the use of __________.
A machinery space supply fan is delivering 5000 cubic 22,222.22 lbs/day
feet of air per minute. The temperature of the air is 71°
F, with a relative humidity of 38%. How many pounds of
air are delivered to the space in a 24 hour period?
feed discharge
pressure to the
suction line
aid in hot gas
defrosting
pass liquid slugs
equalize system
pressure for
compressor cycling
3.3500 inch
3.4750 inch
4.3750 inch
thread series
class of finish
class of fit
2
A
11
2507
B
What is the reading of the vernier caliper scale shown in 3.3750 inch
figure "C" in the illustration?
In the illustration shown, the letters "UNC" used in the
thread profile
notation "1/4-20 UNC-2" indicates the __________.
2508
A
Oil is returned to the illustrated radial piston hydraulic
pump piston(s) numbered as __________.
1
11
Refrigerant recovery equipment that is considered as
being system dependent __________.
must have its own
power source
11
2511
RA-0021
A flapper valve, also known as a beam valve, is
frequently used in refrigeration compressor discharge
valves, and is designed to __________.
2505
C
GS-0070
stand the flange on
end vertically
position the pipe on
the flange, tack weld, GS-0078
then lay flat to
complete the
fabrication
11
2510
tapered needle thrust shaft lantern rings
bearings
432,000.00 lbs/day 533,333.33 lbs/day
slip a temporary
sleeve around the
pipe
C
11
equalizing holes in
the impeller
67,500.00 lbs/day
Illustr
tack weld flat iron
straps from the
flange to the pipe to
complete the
fabrication
A
B
Answer D
416.7 gpm
insert a temporary
sleeve into the pipe
for alignment
2504
2509
Answer C
208.3 gpm
The best method in assisting the proper alignment and
welding of the flange and pipe shown in the illustration
is to __________.
11
11
Answer B
6.9 gpm
GS-0092
GS-0037
3
2 and 3
GS-0059
If a block and tackle arrangement were rigged as shown 35 lbs.
in figure "D" in the illustration, the amount of force "P"
required to hold the 233 pound load stationary would be
__________.
A P-tank system, as used on oilfield supply boats
must be kept free of
__________.
moisture and water
A
184
recovers refrigerant
with the aid of
components in the
system
47 lbs.
are portable units
can only recover
liquid refrigerant
78 lbs.
93 lbs.
GS-0110
is designed to
transfer viscous
liquids
is capable of
answers B and C
pumping chunks of
above
cement that find their
way into the system
Book Num
Ans
11
2512
A
11
2514
A
11
2515
D
11
2516
C
11
2517
C
11
2519
A
11
2520
D
11
2521
C
11
2522
C
11
2523
C
11
2524
D
Question
Answer A
The preconditioned air temperature is 90° F with a
62.00 grains
relative humidity of 66%. After the air has been
conditioned, its temperature has been reduced to 60° F
and is saturated. Using the psychometric chart shown in
the illustration, calculate the number of grains of
moisture removed from one pound of the air.
Answer B
78.00 grains
Answer C
140.0 grains
Answer D
218.0 grains
Illustr
RA-0021
The suction pressure switch controlling the refrigeration pressure acting on a temperature acting
compressor operation is actuated by __________.
bellows
on a bellows
What function is provided by the holes located at the
bottom of the loop within the item "20" shown in the
illustration?
The holes permit
draining of the loop
when the unit is
secured.
The holes are not
holes at all, but
rather an indication
of gas bubbles
flowing through the
system.
temperature acting
pressure acting on
on a thermal element compressor suction
valves
The holes are
The holes aid in the
provided to allow for return of the
any expansion of ice refrigeration oil to the
RA-0018
which may form
compressor.
when the unit is
secured.
Which of the listed illustrated figures represents the
correct use of a lathe threading tool?
Refrigerant entering the compressor of a refrigeration
system should be in which of the following conditions?
Figures L/P
Figures L/U
Figures V/L
Figures V/P
Sub-cooled liquid
Sub-cooled vapor
Superheated vapor
Liquid
The petcock "B" installed on the illustrated pump is
used to __________.
vent the casing at
start-up
supply sealing water provide recirculation provide a sensing
to the stuffing box
at low flow
signal to control the
GS-0070
pump discharge rate
GS-0090
Inhalation of high concentrations of CFCs may have
drowsiness
which of the following effects?
The chemical formula for ozone is represented as
O
__________.
Using the psychometric chart shown in the illustration, 12.2 BTU
determine the quantity of heat removed from one pound
of air as it is cooled from 85° F at 80% relative humidity
to 57° F at 70% relative humidity?
loss of concentration cardiac arrhythmia's all of the above
The device illustrated is used as a __________.
refrigeration system
packless valve
quick closing valve
pressure reducing
valve
high pressure diesel
engine air start valve GS-0054
R-12 has been a suitable refrigerant for use in high
temperature applications with __________.
reciprocating
compressors
rotary compressors
centrifugal
compressors
all of the above
185
O2
O3
Oz
17.2 BTU
22.5 BTU
64.9 BTU
RA-0021
Book Num
11
11
2525
2527
Ans
C
11
2529
C
2532
D
11
2533
C
11
2534
D
2535
The function of the device illustrated is to __________.
control steam input
to a heat exchanger
control condensate
output from a heat
exchanger
provide on/off control provide air purging of
of drain pump
low pressure
refrigeration or air
GS-0048
conditioning systems
When taking readings at the suction service valve of an the pressure, or
operating refrigeration compressor __________.
temperature reading
is only required, as
the refrigerant is
saturated
the pressure and
temperature reading
is required as the
refrigerant is
probably subcooled
the pressure and
temperature reading
is required as the
refrigerant is
superheated
the readings at this
location must always
be recorded as
pressure absolute
and degrees
centigrade
Refrigerant leaving the metering device in a
refrigeration system is a __________.
sub-cooled liquid
sub-cooled vapor
saturated
liquid/vapor mixture
saturated liquid
Operating pressure on a P-tank system should be
__________.
a constantly
the same pressure
required for
maintained range of
repressurization and 15 to 18 psi
cleaning the system
C
11
11
Answer B
Answer C
The device is used to The device is used to
ensure that all
provide flow through
returns go to the
the pilot solenoid.
compressor
discharge.
B
2528
2531
Answer A
The device
determines whether
the unit will be in the
cooling, or heating
and defrost modes of
operation.
A
11
11
Question
What is the function of the device shown in the
illustration?
B
The quarters steam heating system warms the outside 28.7 BTU, 26%
air from 30° F at 80% relative humidity to 105° F.
relative humidity
Additional humidification is not provided and the air
feels very dry. Using the psychometric chart, determine
the amount of heat added to each pound of air and its
approximate relative humidity after being heated.
14.8 BTU, 6%
relative humidity
If you know that a refrigeration system is leaking
refrigerant, you would first___________.
Which of the devices listed will indicate the proper
operation of a refrigeration system dryer?
The pilot solenoid valve used in conjunction with item
#5 shown in the illustration is __________.
Answer D
Illustr
The device is utilized
to reduce the amount
of blowback
occurring in the
RA-0017
condenser due to
propagated wave
fronts.
slightly below the
slightly below the
pilot unloading valve safety valve setting
setting
10.3 BTU, 16%
relative humidity
18.4 BTU, 6%
relative Humidity
RA-0021
recover the
refrigerant
Dryer sensing bulb
charge the system
look for traces of oil
evacuate the system
McLeod gage
Particulate test
Moisture indicator
in the open position
when the unit is in
the heating mode
and the solenoid is
de-energized
a normally closed
energized only
valve when the unit is during the defrost
in the cooling mode mode
and the solenoid is
de-energized
186
normally open if the
unit is in the defrost
and heating mode
and the solenoid is
de-energized
RA-0018
Book Num
Ans
11
2536
B
11
2537
D
11
2538
A
11
2540
B
11
2541
C
11
2542
B
Question
What will cause the throughput of the oily-water
separator shown in the illustration to decrease when
operating in the processing mode?
Answer A
The flow control
valve "14" is open
excessively wide and
permitting an
excessive amount of
bilge water to enter
the separator,
resulting in an
overload.
Answer B
A decrease in the
processing ability
may be caused by a
worn pump internals.
Which of the following base oils cannot be refined
without developing a change in chemical composition?
animal
The function of the illustrated device is to __________.
The device illustrated would be best used as a
__________.
Answer C
The throughput of
the separator may be
reduced if the inlet
valve "4" remains
open during
processing mode.
Answer D
The throughput of
the separator varies
while in the
processing mode as
determined by the
quantity of oil in the
emulsion.
vegetable
mineral
both A and B
relieve compressed
air from the
intercooler after the
compressor has
cycled off
relieve compressed
air directly from the
low pressure cylinder
after the compressor
has cycled off
provide variable
discharge air flow to
the compressed air
system depending on
the load on the
system
direct compressed
air from the air
receiver directly to
the low pressure
cylinder unloading
device
variable capacity
pump
variable or constant
speed motor
power take-off driven hydraulic hatch
lube oil pump
supply pump
ionosphere
stratosphere
troposphere
variable output
alternator
fixed output
alternator
hydraulic crane
power supply
R-123
R-134a
none of the above
since all require a
lube oil change out
and replacement with
a different type of
lube oil
Large quantities of halogenated floro-carbons when
bathosphere
released from refrigeration systems, will contribute to
ozone depletion in the __________.
If the "B" end were driven by an electric motor and the mooring winch
"A" end were disconnected from the line terminals of the
motor controller, the unit illustrated could then be used
as a __________.
Which can be considered as a drop-in replacement
R-500
refrigerant?
11
2543
D
the oil separator
B
each expansion
valve
the condenser
2544
In a multi-evaporator refrigeration system, a solenoid
valve is installed in the liquid line before __________.
the receiver
11
0.9403 inch
0.9453 inch
0.9553 inch
2547
C
What is the reading of the vernier micrometer caliper
scale shown in figure "D" in the illustration?
0.9253 inch
11
Illustr
GS-0153
GS-0034
GS-0058
GS-0057
GS-0091
187
Book Num
Ans
11
2549
D
11
2550
A
Question
Answer A
Industrial process and commercial CFC type
15 pounds (6.8 kg)
refrigeration equipment with annual leak rates of 35% or
more, require leak repair of the system if it contains a
refrigerant charge of more than __________.
Answer B
25 pounds (11.4 kg)
Answer C
40 pounds (18.1 kg)
Answer D
50 pounds (22.6 kg)
Which of the listed welded joints represents the least
amount of preparation?
A light dust trail from the storage tank vent, plus a
fluctuating P-tank pressure and constant movement of
the material discharge hoses indicates __________.
3A
3B
4A
1B
satisfactory
a clogged discharge chunks of material
movement of weight line
are moving through
material
the system and
transfer will stop
momentarily
0.216 psi
0.228 psi
0.325 psi
0.433 psi
0.2228 inch
0.3028 inch
2551
A
11
2552
C
11
2553
B
A boiler forced draft pressure gage indicates nine (9)
inches of water. This corresponds to a pressure of
__________.
What is the reading of the vernier micrometer caliper
scale shown in figure "B" in the illustration?
11
2554
B
The liquid line, thermostatically controlled, solenoid
valve is operated in response to the __________.
superheat in the tail
coil
temperature of the
box
compressor suction
pressure
compressor
discharge pressure
When the device shown in the illustration is in the
defrost mode, the __________.
solenoid valve is deenergized and the
valve assembly
moves to the right
compressor
discharge pressure
acts on the right side
of the piston causing
it to move to the left
condenser pressure
acts on the back of
the valve forcing it to
move towards the left
the solenoid valve is
energized and the
valve assembly is
moved to the right
ammonia and carbon
dioxide
If the valve disk is
damaged, the entire
valve unit must be
replaced.
ammonia and ethane methane and sulfur
dioxide
The plug, located in The cap determines
the upper left portion the height of lift of
of the valve body can the swinging valve
be removed to install disk.
a feedback pipe line
if the valve is to be
used as a pilot
choke.
ethane and methane
amount of torque
required to position
this rudder
positioning, directly
aft of the propeller
necessity to
construct the rudder
in one large casting
pump should
discharge directly to
the reservoir
cylinder should
retract
11
2555
D
11
2557
D
11
2558
Most Freon refrigerants are originated primarily from
which of the following base molecules?
Which of the following statements regarding the
illustrated device is true?
GS-0091
D
11
2559
B
11
2560
D
The greatest drawback in the use of the device
illustrated on large ocean going vessels is the
__________.
0.3008 inch
GS-0077
inadequate fluidizing
of the weight material
11
0.2928 inch
Illustr
use of a skeg for
mounting
If solenoid "B" illustrated is energized, the __________. pump should reverse cylinder should
the direction of flow extend
188
RA-0017
The valve disk alone
can be removed for
replacement or
reconditioning.
GS-0056
GS-0101
GS-0041
Book Num
Ans
Question
If a block and tackle arrangement were rigged as shown
in figure "D" in the illustration, the amount of force "P"
required to hold the 266 pound load stationary would be
__________.
In a refrigeration system, the condenser cooling water
regulating valve is directly controlled by the
__________.
In a refrigeration system, the component installed
downstream of the thermal expansion valve is called the
__________.
What type of valve is shown in the illustration?
11
2562
D
11
2564
B
11
2566
A
11
2567
D
11
2568
D
11
2569
B
Refrigerant recovery cylinders are color
coded__________.
The purpose of nozzles in a liquid mud system is
to_________.
11
2570
C
A pneumercator is an instrument used to indicate
__________.
11
11
2571
2573
D
D
Movement of the material discharge hoses, fluctuating
P-tank air pressure and a light dust trail from the
receiving tank vent indicates __________.
11
2576
2577
Answer B
53 lbs.
temperature of the
cooling water
compressor
discharge pressure
evaporator
receiver
Globe valve - rising
stem
gray top and yellow
lower body
aerate the mud to
insure proper oxygen
content
air pressure in the
diesel engine starting
circuit
a clogged discharge
line
Gate valve - rising
stem
gray top and light
blue lower body
maintain the quality
of the mud
Answer D
89 lbs.
Illustr
improper movement chunks of material
of the weight material are in the system
and will stop the flow
momentarily
The pumps are
To reduce the
unable to handle the amount of free
greater quantity of
communication
mud carried by one therefore, reducing
or two tanks.
the center of gravity
of the OSV.
a leaking sea valve any leakage can
decreases stability of destroy the product
the OSV
being transported
Which of the following steps should be taken before
Inspect tanks to
Test a sample to
taking on a load of liquid mud for transport to a MODU? insure they are clean insure that the
and dry.
emulsifying amines
do not exceed a
STEL of 25 ppm.
189
amount of refrigerant temperature of the
in the system
refrigerant after
expansion
compressor
solenoid valve
Globe valve - rising
disk
light blue top and
yellow lower body
clean the mud from
the bottom of the
tanks
phosphates in boiler tank fluid level
water
B
A
Answer C
56 lbs.
GS-0110
Why do OSV's with a liquid mud system generally have To increase the
more than two tanks?
quantity of mud
carried.
In a liquid mud system, the sea valve must be tightly
secured and not leak because___________.
11
Answer A
40 lbs.
Gate valve - rising
gate
yellow top and gray
body
Prevent barate from
damaging the pump
micro ohms in
condensate
satisfactory operation
of the system
To prevent list and
stability problems
when receiving half a
load of fluid from the
rig.
leaking oil-base mud more liquid mud will
creates an
be discharged to the
environmental
MODU than ordered
hazard according to
Coast Guard
regulations (33 CFR)
Flood the tanks with
carbon dioxide and
test product with an
explosimeter (gas
detector).
All of the above.
GS-0047
Book Num
11
11
2578
2579
Ans
D
11
2582
C
C
11
2585
C
11
2586
B
11
2587
A
11
2588
D
11
2589
It is important to circulate liquid mud on an OSV
to_______.
insure that the liquid reduce damage to
mud maintains a
the mud due to salt
weight of less than
water contamination
8.3 lbs/gal.
ensure that the pump
suctions remain
unplugged and keep
the liquid mud in
good condition
reduce corrosion
damage due to the
acidic nature of zinc
bromide
Unless told otherwise by the mud dock representative,
the recommended circulation time and rate for most
new water based liquid mud for each tank
is___________.
once a day for three
hours with a diesel
powered mud pump
at half throttle
thirty to sixty minutes
every twelve hours
with a diesel
powered pump at full
throttle or by a high
capacity electric mud
pump
one day circulating,
three days off with a
small electric mud
pump
fifteen minutes every
six hours with a small
pump, or diesel
pump at half throttle
The reading on the micrometer scale shown in figure
"A" in the illustration is __________.
A multiple evaporator coil unit is equipped with an
evaporator back pressure regulating valve. This valve
must be bypassed when pumping down the system for
repairs because reduction of suction pressure would
cause the valve to __________.
When the system shown in the illustration is operating
in the defrost or heating mode, the majority of the gas
flows through the defrost pan heater. A small quantity of
the remaining gas is used to __________.
0.066 inch
0.071 inch
0.076 inch
0.081 inch
rupture
open
close
chatter
create a pressure
drop to increase all
flow velocities
assist in the
defrosting of the
equalizing line
force the remaining
liquid out of the
receiver and into the
system
reduce the chances
of any thermohydraulic lock
occurring during the
defrost cycle
0.178 inch
0.193 inch
0.250 inch
partially
hydrogenated
fully carbonated
completely filled with
hydrogen atoms
Figure C
Figure G
Figure H
C
2580
2584
Answer A
keep the mud
ingredients in
suspension and
retain weight
properties
A
11
11
Question
It is important to circulate the liquid mud on an OSV at
regular intervals to___________.
A
The reading on the micrometer scale shown in figure "3" 0.133 inch
in the illustration is __________.
The refrigerants referred to as CFC's are __________. fully halogenated
A micrometer scale reading is indicated as 0.438 inches Figure A
and is represented in the illustration by __________.
All refrigerant recovered from burned out small
appliances must be __________.
Answer B
reduce the free
surface effect and
increase the
metacentric height
(GM) during transport
sent to a designated contained in a
reclamation facility
refillable cylinder
for processing
190
Answer C
Answer D
increase the free
minimize the release
surface effect and
of explosive gases
reduce the
during transport
metacentric height
(GM) during transport
Illustr
GS-0093
RA-0018
GS-0094
GS-0013
destroyed although it used to clean out
can be reused
burn-outs
Book Num
11
2591
D
11
2592
B
Question
Which of the following refrigerants is an interim retrofit
replacement for R-11?
The lathe tool shown as figure "Q" in the illustration is
commonly known as a/an __________.
11
2593
A
Excess pressure used in a P-tank system will more than rupture the P-tank
likely __________.
11
2594
Ans
B
11
2595
D
11
2596
B
11
2597
C
11
2598
C
11
2600
D
11
11
2601
2603
In preparing to remove the air from a refrigeration
condenser for a large multi-box water cooled type III
system, all of the refrigerant in the system should be
__________.
If the three way valve shown in the illustration
malfunctions while at sea, which of the following
procedures can be carried out to correct the situation?
Answer A
R-500
Answer B
R-134a
R-12
cutting-off tool
left-cut, side-facing
tool
right hand turning
tool
universal turning tool
discharge the
material at an
excessive rate
pumped to the
receiver
plug up the fixed
discharge line with
weight material
pumped to the
evaporator
damage the air
compressor
The pilot solenoid
valve should be
changed out even if it
appears to be
operating
satisfactory.
The device may be
removed from the
unit using swaging
tools.
The device may be
rebuilt using the
proper rebuild kit if
provided.
0.349 inch
0.361 inch
0.453 inch
80%
90%
99%
active only
either active or
passive
do not need to
recover the
refrigerant
R-123
at a superheated
temperature
The unit should be
bypassed to insure
the system always
operates in the
cooling mode.
The reading on the micrometer scale shown in figure
0.325 inch
"C" in the illustration is __________.
75%
When recovering R-12 from a small appliance with a
working compressor, using a recovery device
manufactured after November 15, 1993, what
percentage of the remaining charge must be removed
from the system?
Technicians servicing small refrigeration appliances can passive only
employ what type of recovery equipment?
Answer D
R-123
at a saturated
temperature
R-12
R-22
R-502
self-contained
recovery devices can
only be used on
large CGC and
HCFC units
self-contained
recovery devices
usually contain a
compressor, systemdependent recovery
devices do not
the system
there is no difference
compressor must be between the devices
working to use
system dependent
devices, the system
compressor may or
may not be
operational when selfcontained devices
are used
Overfilling a refrigerant container is extremely
dangerous because of the high pressures generated.
The generation of pressure is the_________.
vapor pressure of the discharge pressure
refrigerant
of the recovery
compressor
191
Illustr
GS-0090
Which of the following represents a low-pressure
refrigerant as defined by EPA regulation?
What differentiates 'system-dependent' and 'selfcontained' recovery devices in refrigeration systems?
B
C
Answer C
hydrostatic pressure discharge pressure
of the expanding
from the recovery
liquid
cylinder
RA-0017
GS-0013
Book Num
11
2604
Ans
C
11
2605
A
11
2607
C
11
2608
A
11
2609
C
11
2610
D
11
2611
C
11
2612
C
11
2613
B
11
2614
C
11
2615
Question
The reading indicated on a vernier micrometer caliper
scale is .3107 inches. Which of the figures in the
illustration represents this reading?
How do the modulating valves, found in some container
refrigeration systems, differ in operation from solenoid
valves found in the same system?
Answer A
Figure B
Answer B
Figure C
Answer C
Figure E
Answer D
Figure F
Illustr
GS-0091
An unenergized
modulation valve is
in the normally open
position.
An unenergized
modulation valve is
in the completely
closed position.
All refrigeration systems must be protected with a
high pressure cut-out refrigerant receiver
__________.
The hydraulic graphic symbol illustrated in Fig. B is
variable orifice
piloted choke
used to represent a/an __________.
low side only
If passive recovery is used on a refrigeration unit with a high side only
non-operating compressor, the recovery should be
made through____________.
The process of removing refrigerant from a system and reclaiming
storing it without testing or processing is known as
__________.
Figure "D" in the illustration is an improperly installed
right hand fitting
hose with a restriction developed at the __________.
being smaller than
required
Which of the following is not part of the high side of a
condenser
refrigeration system?
Refillable tanks used to ship CFC and HCFC
the United States
refrigerants or used to recover these refrigerants must Coast Guard
meet the standards of __________.
If you find an extremely large refrigerant leak while
change from blue to
using a halide torch, your flame will __________.
orange
How does a refrigeration solenoid valve differ from a
A solenoid valve can
modulating valve?
only be installed in
liquid lines.
B
192
An unenergized
solenoid valve is in
the normally open
position.
All modulation valves
have the identical
operating
characteristics as
solenoid valves used
in refrigeration
systems.
pressure relief device low pressure cut-out
belle ville spring
check valve
high and low side
venting to
atmosphere, cannot
be recovered
recouping
recycling
recovering
severe bend in loop
sharp bend formed at indicated radial twist
the left
receiver
accumulator
liquid line
the United States
Department of
Transportation
'flare up' and remain
lighted
A liquid line solenoid
valve is either
completely opened
or closed, whereas a
modulation valve is
positioned according
to the strength of the
applied electrical
signal.
Underwriters
Laboratories
the Environmental
Protection Agency
probably go out
stay blue
Solenoid valves are
only used in low
voltage refrigeration
control systems,
while modulation
valves are used in
high voltage
applications.
Both valves operate
in exactly the same
manner, only the
manufacturer's
terminology is the
differentiating factor.
GS-0068
GS-0063
Book Num
11
2617
Ans
C
11
2619
C
11
2620
C
11
2622
B
11
2623
D
11
2624
B
11
2626
B
11
2627
D
11
2628
D
11
2631
B
11
2632
B
11
2633
A
11
2634
D
11
2635
D
Question
Answer A
A micrometer scale reading is indicated as 0.148 inches Figure D
and is represented in the illustration by __________.
Answer B
Figure E
Within the territorial limits of the United States,
$5,000
violations of the Clean Air Act of 1990, that includes the
intentional release of R-11, R-12, R-22 and other
related class I or class II substances may result in fines
for each violation per day of __________.
$10,000
$25,000
$50,000
The reading on the micrometer scale shown in figure
"B" in the illustration is __________.
The reading indicated on a vernier micrometer caliper
scale is .4715 inches. Which of the figures in the
illustration represents this reading?
Operating a P-tank system with excessive pressure in
the tank will most likely cause __________.
0.402 inch
0.410 inch
0.412 inch
0.415 inch
Figure A
Figure C
Figure E
Figure F
damage to the air
compressor
the dry bulk material the discharge to plug damage to the slope
sheets
to be discharged at up with weight
material
an excessive rate
Which of the following instruments can be used to
measure the rate of air flow?
The illustrated thread form would be used with a/an
__________.
When using nitrogen to pressure leak test a system, the
nitrogen tank should always have a __________.
Thermometer
Anemometer
The weld type illustrated and indicated as '5B' is known
as a/an __________.
Consultation should be made prior to beginning the
conversion of an existing CFC-12 system to HFC-134a
with __________.
If a block and tackle arrangement were rigged as shown
in figure "D" in the illustration, the amount of force "P"
required to hold the 283 pound load stationary would be
__________.
If a block and tackle arrangement were rigged as
illustrated in figure "D", the amount of force "P" required
to hold the 283 pound load stationary would be
__________.
When air is at its dew point, it is at its __________.
The movement of the armature within a modulating
valve as used on some refrigeration systems is
opposed by the __________.
Answer C
Figure F
Answer D
Figure I
Illustr
GS-0013
GS-0093
GS-0091
Psychrometer
Aerometer
pump shaft coupling lathe lead screw
nut
cut off valve
blue top
schedule 80 heavy
iron pipe
level indicator
3/4-10 NC threaded
stock
regulator
X
K
double bevel
double J
the Environmental
Protection Agency
the system's
manufacturer
the United States
Coast Guard
the owner of the
system
42 lbs.
94 lbs.
113 lbs.
114 lbs.
GS-0088
GS-0077
GS-0110
94 lbs.
107 lbs.
114 lbs.
125 lbs.
GS-0110
lowest absolute
humidity
pressure of the flash
gas developed
193
lowest relative
humidity
vacuum formed as
the refrigerant flows
through the valve
highest absolute
humidity
weight of the
armature
highest relative
humidity
spring force
Book Num
11
11
2637
2638
Ans
B
A
Question
Which of the refrigerants listed is considered as a
suitable replacement for R-11?
If you have a simplex single acting reciprocating pump
making 100 strokes/minute with 6" diameter cylinder,
and an 11" stroke with 90% volumetric efficiency, what
is the capacity of this pump?
R-22
Answer B
R-123
Answer C
R-134a
Answer D
R-227
61 gpm
121 gpm
242 gpm
407 gpm
When the oily-water
mixture is an
emulsion the
effectiveness of the
separator is greatly
reduced.
Without detergents
the effectiveness of
the separator is
greatly reduced.
When there are
small air leaks in the
discharge piping, the
effectiveness of the
separator will greatly
reduced.
When the oily-water
separator is in the
process mode it will
effectively handle
emulsions.
Which of the illustrated lathe tools would be used to
produce figure V?
Persons recovering refrigerant from small appliances
must be certified as a __________.
Which of the refrigerants listed is considered as a
suitable and limited ozone producing alternative for R11?
The air compressor for a P-tank unit should be operated
for several minutes with its discharge valves open to the
atmosphere to __________.
As the amount of moisture in the air increases, the
difference between the dry bulb and wet bulb
temperatures will __________.
In the hydraulic anchor windlass system illustrated, if
the power to the electric motor is on, but the wildcat
turns slowly or not at all, even without a load being
applied, and nearly normal pressure is indicated on the
high side of the system, the probable cause is the
__________.
A
B
D
E
Type II technician
Type III technician
All of the above
R-22
R-123
Type I or Universal
technician
R-134a
assist in unloading
the compressor
during its start up
increase
remove bulk material check the pilot
dust from the
unloader operation
discharge lines
decrease
remain unchanged
replenishing pump
coupling is broken
relief valve "L" is not manual transfer
closing
valve is in the wrong
position for the main
pump being operated
pressure from "E"
has failed to bleed off
when "J" is placed in
GS-0160
the operating
position
Alkyl benzene ISO 32 cSt refrigerant oil is miscible and
suitable to use with___________.
Refrigerant leaks in a small shipboard water cooler
__________.
R-22
R-32
R-134a
R-143a
must be repaired
within 30 days
must be repaired if
the annual leak rate
is 35% of the total
charge above 50 lbs
must be repaired if
the annual leak rate
is 15% of the total
charge
do not have to and
are not required to
be repaired
The reading on the micrometer scale shown in figure
"III" in the illustration is __________.
0.631 inch
0.642 inch
0.687 inch
0.692 inch
Under what conditions would the oily-water separator,
shown in the illustration, fail to effectively process a
mixture of oily-water?
11
2639
A
11
2640
D
11
2641
C
11
2642
B
11
2643
D
11
2644
B
11
2646
B
11
2647
A
11
2649
D
11
2650
C
Answer A
194
Illustr
GS-0153
GS-0009
R-227
assist in delivering
moisture free air
be greatest at dew
point
GS-0095
Book Num
11
2651
Ans
C
11
2653
D
11
2654
D
11
11
2656
2657
Question
As shown in the illustration, a section of standard
weight, seamless steel pipe, has an external diameter
of 7.8 inches. When the pipe, is bent into a 90 degree
turn, the length of the outside edge of the curve "A-B"
will exceed the length of the inside
According to the data provided in the table, if the
evaporator pressure is 29.4 psia and the temperature of
the refrigerant leaving the evaporator is 35° F,
approximately how much superheat was picked up in
the evaporator?
The speed of a belt driven ventilation fan can be
increased without changing the motor speed by using a
__________.
What will cause the throughput of the oily-water
separator illustrated to decrease when operating in the
processing mode?
B
C
11
2658
C
11
2659
D
11
2660
B
11
2662
A
Answer A
8.626 inches
Answer B
10.786 inches
Answer C
12.252 inches
Answer D
14.514 inches
Illustr
GS-0108
10° F
15° F
20° F
25° F
RA-0023
smaller diameter fan smaller diameter
drive pulley
The flow control
valve 'V-3' is open
excessively wide and
permitting an
excessive amount of
bilge water to enter
the separator,
resulting in an
overload.
A decrease in the
processing ability
may be caused by
worn pump internals.
larger diameter fan
larger diameter drive
pulley
The throughput of
the separator may be
reduced if the inlet
valve 'V-4' remains
open during
processing mode.
The throughput of
the separator varies
while in the
processing mode as
determined by the
quantity of oil in the
emulsion.
26 gpm
91 gpm
GS-0113
If you have a simplex single acting reciprocating pump 104 gpm
making 160 strokes/minute, with a 4" diameter cylinder,
a 7" stroke and operating with 85% volumetric
efficiency, what is the capacity of this pump?
52 gpm
With a service gage manifold connected to a refrigerant
compressor as illustrated, which arrangement of the
gage manifold valves and compressor service valves
would allow for the reading of the compressor suction
pressure?
A flat piece of sheet metal can be fastened to the
device illustrated and would require the use of which
listed type of fastener?
The approximate quantity of hydraulic oil available to
the system can be determined by __________.
Valves "A" and "B"
open, valves "C" and
"D" closed on their
front seats.
Valves "A" and "B"
Valve "A" closed and
closed, valves "C"
valve "D" just off its
and "D" open just off back seat.
the back seats.
Valves "A" and "B"
open, valves "C" and
"D" open in midRA-0003
position.
pop rivet
cap screw
removing "G" and
measuring the level
in the sump with a
'dip stick'
flat head
countersunk machine
screw
observing the color
change of the
column in "J" and its
comparative height
The device illustrated is referred to as a/an
__________.
inverted bucket trap
upright bucket trap
195
carriage bolt
GS-0036
removing "D" and
measuring the height
of the remaining
liquid with a float
stick
"P" type trap
removing the cap
from "A" and
measuring the height GS-0118
of the hydraulic oil
none of the above
GS-0048
Book Num
Ans
11
2663
C
11
2665
C
11
11
11
11
11
11
2666
2668
2669
2672
2673
2674
D
D
B
Question
All shipboard personnel responsible for the
maintenance and repair of air conditioning systems
must be certified through an approved Environmental
Protection Agency (EPA) program __________.
Answer A
Answer B
if the system is using before they can set
HFC-134A or HCFC- the operating
123
controls of the
system
Answer C
Answer D
if they will be
all of the above
performing
maintenance, service
or repair that could
reasonably be
expected to release
Class 1 or Class 2
refrigerants into the
atmosphere
Solenoid valves used in refrigeration systems may be
classified as __________.
normally open, deenergized
normally closed,
energized
normally open or
normally closed
If you have a simplex single acting reciprocating pump 183 gpm
making 160 strokes/minute, with a 5" diameter cylinder,
a 7" stroke and operating with 96% volumetric
efficiency, what is the capacity of this pump?
91 gpm
128 gpm
normally energized
or normally deenergized
46 gpm
If you have a duplex double acting reciprocating pump 54 gpm
making 180 strokes/minute, with a 4" diameter cylinder,
a 6" stroke and operating with 92% volumetric
efficiency, what is the capacity of this pump?
81 gpm
27 gpm
108 gpm
Small appliances with less than three pounds of
refrigerant should be __________.
liquid charged
vapor charged
either vapor or liquid initially liquid charged
charged
and then topped with
a vapor charge
The steering gear shown in the illustration, when
compared to the more conventional linear actuator ram
units is/are __________.
less likely to sustain
oil leaks
considered by
inspection societies
to be more
dependable than the
more conventional
units due to the use
of the vane motor
designed to be of
all of the above are
lesser weight and
correct
size when compared
with conventional
units producing the
same torque
C
D
C
The air compressor for a P-tank unit should be operated discharge moisture dry out fixed
assist in producing
for several minutes with its discharge valves open to the formed during the
discharge piping and water free
atmosphere to __________.
compression process hoses
compressed air
all of the above
In a chilled water air conditioning unit using a
reciprocating compressor, the refrigerating effect of the
primary refrigerant can be increased by __________.
superheating the
refrigerant in the
compressor
increasing refrigerant increasing chilled
pressure in the coil
water flow through
the cooler
196
subcooling the
refrigerant in the
condenser
Illustr
GS-0116
Book Num
Ans
11
2676
B
11
2677
D
11
2678
B
11
2680
D
11
11
11
11
11
11
2681
2684
2685
2686
2687
2688
B
D
A
B
B
B
Question
A flat piece of thin sheet metal fastened to the device
illustrated, would most likely require the use of which
listed type of fastener?
Moisture is removed from CFC-12 using a recycler by
__________.
The type of heat indicated in section "2" in the
illustration is known as __________.
I. latent heat of fission
II. latent heat of fusion
The thread machined on the device illustrated is a/an
__________.
Answer A
countersunk flat
head, Phillip screw
Answer B
Answer C
round head machine fitted or body bolt
screw
bleeding
opening a drain
noncondensables off petcock on the oil
separator
I only
II only
Answer D
molly screw
Illustr
GS-0036
condensing the water using a dehydrator
in the condenser
cartridge
Both I and II
Neither I nor II
SG-0001
one-eighth inch right- one inch, right-hand
hand national coarse national coarse
highest system
pressure with the
lowest boiling point
one-eighth inch, left- one inch, left-hand
hand national coarse national coarse
lowest system
pressure with the
highest boiling point
GS-0038
highest system
pressure with the
highest boiling point
Of the four refrigerants CFC-11, CFC-12, HFC-134a,
and HCFC-22; HCFC-22 operates at the __________.
lowest system
pressure with the
lowest boiling point
The expansion valve used in a refrigeration system
regulates the __________.
superheat of the gas back pressure in the temperature in the
leaving the
evaporator
refrigerated space
compressor
degree of superheat
of the gas leaving the
evaporator
The carbon ring of a refrigeration compressor
crankshaft mechanical seal is held in position against
the stationary ring by using a/an __________.
spring
snap ring
woodruff key
thrust washer
If you have a simplex single acting reciprocating pump 131 gpm
making 160 strokes/minute, with a 4" diameter cylinder,
a 10" stroke and operating with 75% volumetric
efficiency, what is the capacity of this pump?
33 gpm
65 gpm
163 gpm
If oil under pressure is supplied to the space between
"N" and "I" in the illustration __________.
"O" will rotate
clockwise as oil is
returned from the left
side of vane "N"
"O" will rotate
counter-clockwise as
oil is returned from
the area between "N"
"U" will rotate counterclockwise as oil is
returned from the
area between "N"
and the vane located GS-0116
at "P"
11.467 inches
13.886 inches
16.467 inches
"O" will be
hydraulically locked
in place even though
oil is returned to the
main pump from the
left side of "N" and
the area to the right
of "P"
As shown in the illustration, a section of standard
10.263 inches
weight, seamless steel pipe, has an external diameter
of 7.3 inches. When the pipe, is bent into a 90 degree
turn, the length of the outside edge of the curve "A-B"
will exceed the length of the inside edge of the curve "CD" by __________.
197
GS-0108
Book Num
11
11
11
11
11
11
2690
2691
2692
2694
2695
2697
Ans
D
A
B
B
B
2698
C
11
2700
C
2701
Answer A
CFC-12
Answer B
CFC-11
Answer C
HCFC-22
Answer D
HFC-134a
I only
II only
Both I and II
Neither I nor II
in the middle of the
evaporator coils
near the evaporator
coil outlet
near the evaporator
coil inlet
at the beginning of
the bottom row of the
evaporator coils
When installing a mechanical shaft seal on a
refrigeration compressor, extreme care must be taken
to prevent __________.
any lubricant from
contacting the
carbon surface that
would cause the
expulsion of the
saturated Teflon film
dirt and foreign
particles from coming
in contact with the
highly polished
sealing surfaces
the Teflon film from
being damaged by
the corrosive effects
of excessive
handling
shaft scoring due to
improper use of the
installation tools
provided with the
seal kits
What would be the result of throttling the suction valve
to the point where the flow was less than that
recommended by a centrifugal pump manufacturer?
I. The designed discharge head would be reduced.
II. The packing life would be greatly reduced.
I only
II only
Both I and II
Neither I nor II
In order to maximize the performance of an operating
centrifuge, you can adjust the fuel oil __________.
I. viscosity
II. through-put
I only
II only
Both I and II
Neither I nor II
The reading on the micrometer scale shown in figure
"H" in the illustration is __________.
The type of thread illustrated is a/an __________.
0.418 inch
0.428 inch
0.438 inch
0.448 inch
acme thread
national coarse
thread
square thread
can not be
determined from
information provided
B
11
11
Question
An untagged refrigerant cylinder is found in your
storage area. It is light (sky) blue, and the refrigerant it
contains is __________.
The heat removed from a fluid as indicated by line "3" in
the illustration is known as __________.
I. subcooling
II. latent heat of condensation
In the illustration, the item labeled as '31' is
__________.
I. used to vent off air from the stuffing box
II. used to supply sealing water to the stuffing box
In a refrigeration system, the bulb for the thermal
expansion valve is always located __________.
Illustr
SG-0001
I only
II only
Both I and II
Neither I nor II
GS-0012
B
198
GS-0013
GS-0038
Book Num
Ans
Question
What will cause the throughput of the oily-water
separator shown in the illustration to decrease when
operating in the processing mode?
11
2702
B
11
2703
B
P-tank dry bulk material discharge hoses must be
connected __________.
C
Refrigeration systems using forced air circulation
evaporators have a tendency to cause rapid
dehydration of foods unless __________.
11
2704
11
2705
C
11
2706
C
11
2708
B
11
2710
C
11
2711
C
11
11
2712
2714
C
A
The color of the refrigeration oil can indicate various
operating conditions of the compressor/ refrigeration
system in which it is used. Black oil can be an indication
of __________.
Potable and non-potable water systems aboard ship
__________.
If you have a duplex double acting reciprocating pump
making 190 strokes/minute, with a 3" diameter cylinder,
a 12" stroke and operating with 90% volumetric
efficiency, what is the capacity of this pump?
Which of the figures in illustration GS-0080 would be
used in conjunction with figure "B" of the device shown
in illustration GS-0124?
HCFC-123 presents health threats to service
technicians, which may include its __________.
Answer A
The flow control
valve 'V-3' is open
excessively wide and
permitting an
excessive amount of
bilge water to enter
the separator,
resulting in an
overload.
Answer B
A decrease in the
processing ability
may be caused by
worn pump internals.
Answer C
The throughput of
the separator may be
reduced if the inlet
valve 'V-4' remains
open during
processing mode.
Answer D
The throughput of
the separator varies
while in the
processing mode as
determined by the
quantity of oil in the
emulsion.
after admitting
compressed air to
the P-tank
a complete change
of air takes place
within each 30
second interval
before admitting
compressed air to
the P-tank
foods are packaged
in corrugated storage
boxes
after opening the jet
air
before the P-tank is
loaded
copper plating
caused by moisture
in the system
bearing wear or
piston scoring
carbonization
resulting from air in
the system
gasket breakdown
may be temporarily
connected with a
removable spool
63 gpm
are permanently
connected through a
double stop valve
126 gpm
may never be crossconnected by any
means
251 gpm
may be connected if
they are used only
for wash water
31 gpm
figure B
figure C
figure F
figure G
Illustr
GS-0113
the air is circulated
a humidifier is
slowly with a
installed within the
minimum
refrigeration system
temperature change
GS-0080
flammability as a
liquid
The type of heat indicated in section "4" in the
I only
illustration is known as __________.
I. latent heat of condensation
II. latent heat of vaporization
The valve shown in the illustration is installed on the
"E" is the inlet.
suction side of the compressor in a refrigeration system.
Which of the following statements about this valve is
correct?
199
freezing in the
compressor
toxic threat
being caustic and
strong offensive odor
II only
Both I and II
Neither I nor II
SG-0001
"D" is the back seat. The valve is of the
packless type.
All of the above.
RA-0008
Book Num
Ans
11
2715
D
11
2716
A
11
2717
A
11
11
2718
2719
B
A
11
2720
D
11
2721
C
11
2722
Question
The oil observed in the sight glass of an operating
refrigeration compressor appears to be brownish in
color. This is indicative of __________.
Answer A
Answer B
carbonization caused bearing wear or
by air in the system piston scoring
Answer C
head gasket
breakdown
Answer D
copper plating
caused by moisture
in the system
In a hydraulic system using the device illustrated, the
high pressure return is provided by __________.
A
C
D
In addition to the recovery of refrigerant, recovery
machines not necessarily able to pull a vacuum can
also evacuate a system of __________.
If a block and tackle arrangement were rigged as shown
in figure "D" in the illustration, the amount of force "P"
required to hold the 346 pound load stationary would be
__________.
If you have a simplex single acting reciprocating pump
making 100 strokes/minute with a 6" diameter cylinder,
and a 10" stroke at an 80% volumetric efficiency, what
is the capacity of this pump?
non-condensable
gases
oil
moisture
acids
52 lbs.
115 lbs.
129 lbs.
138 lbs.
49 gpm
98 gpm
196 gpm
272 gpm
If you have a simplex single acting reciprocating pump
making 120 strokes/minute with a 5" diameter cylinder,
a 5" stroke, and operating with a 93% volumetric
efficiency, what is the capacity of this pump?
61 gpm
38 gpm
30 gpm
24 gpm
CFC refrigerants exposed to high temperature or direct
flame, will decompose and may produce __________.
methyl chloride
ammonia
hydrofluoric acid
ozone
When operating the oily-water separator shown in the
illustration, why is it necessary to avoid detergents
mixing with the bilge water?
The detergent will
agitate within the
separator and cause
it to explode.
The detergent will
damage the special
protective coating in
the inside of the unit.
The detergents may
cause the oil and
water to become an
emulsion which this
unit is not capable of
separating.
The detergent will
foam causing the
main bilge pump to
become air bound.
blast bulk material
out of the fill line by
using high air
pressure
E
fluidize dry material
in the material
discharge line
fill the P-tank
pressure the P-tank
B
C
F
C
11
2723
B
11
2724
C
The purpose of the jet air line in a P-tank system is to
__________.
Which of the lettered components shown in the
illustration indicates the high pressure cutout?
B
Illustr
GS-0118
GS-0110
200
GS-0153
RA-0005
Book Num
Ans
11
2725
A
11
2726
B
Question
Answer A
The color of the oil observed in the sight glass of an
gray or metallic
operating refrigeration compressor experiencing bearing
wear or piston scoring would appear __________.
11
2727
2728
90 fathoms
chillers are often
opened for
maintenance
one - 15 foot
segment
because of the
refrigerant's low
boiling point
If you have a simplex single acting reciprocating pump
making 200 strokes/minute with 3" diameter cylinder, a
4" stroke, and operating with a 93% volumetric
efficiency, what is the capacity of this pump?
11 gpm
23 gpm
40 gpm
46 gpm
If you have a simplex single acting reciprocating pump
making 100 strokes/minute with a 6" diameter cylinder,
a 7" stroke, operating with a 90% volumetric efficiency,
what is the capacity of this pump?
105 gpm
39 gpm
77 gpm
107 gpm
The reading on the micrometer scale shown in figure
"E" in the illustration is __________.
If you have a simplex single acting reciprocating pump
making 100 strokes/minute with a 6" diameter cylinder,
a 4" stroke, operating with a 90% volumetric efficiency,
what is the capacity of this pump?
0.112 inch
0.137 inch
0.148 inch
0.151 inch
22 gpm
20 gpm
88 gpm
44 gpm
If you have a simplex single acting reciprocating pump
making 110 strokes/minute with a 7" diameter cylinder,
a 8" stroke, operating with a 91% volumetric efficiency,
what is the capacity of this pump?
267 gpm
67 gpm
133 gpm
152 gpm
Which of the listed statements describes the reason
why oil foaming occurs when starting a refrigeration
compressor?
If the oil level is not
initially high, this
condition is the result
of agitation created
by the movement of
the mechanical
components.
This condition is the This will occur only if
result of the sudden crankcase heaters
low pressure created are used.
in the crankcase at
start up causing the
release of refrigerant
accumulated within
the oil.
A
A
11
2729
B
11
2730
B
11
11
11
2732
2733
2735
A
B
B
Answer C
Answer D
clear, because the
as a light blue-green
heavier particles
would gravitate to the
bottom of the sump
one - 90 foot
segment
such a chiller can
evacuation of all air
operate at a pressure from a chiller is not
below atmospheric
possible
pressure
A shot of anchor chain is equal to __________.
A purge cycle is required on all low pressure chillers
because __________.
11
Answer B
black
one chain link
201
This phenomenon is
inherent only in
hermetically sealed
units and is always
provisional.
Illustr
GS-0013
Book Num
Ans
11
2736
A
11
2737
D
11
2738
C
11
11
11
11
2739
2740
2741
2742
D
C
C
C
11
2743
D
11
2744
B
11
2746
D
Question
Answer A
As shown in the illustration, a section of standard weight 11.153 inches
seamless steel pipe, has an external diameter of 7.1
inches. When the pipe, is bent into a 90 degree turn,
the length of the outside edge of the curve "A-B" will
exceed the length of the inside edge of the curve "C-D"
by __________.
Answer B
13.635 inches
What is the cooling medium used for most portable
recovery unit condensers aboard ship?
If you have a simplex single acting reciprocating pump
making 190 strokes/minute with a 6" diameter cylinder,
a 5" stroke, and operating with an 88% volumetric
efficiency, what is the capacity of this pump?
condenser water
vapor at the outlet
102 gpm
air conditioner drains chiller water taken at potable water
inlet
85 gpm
51 gpm
205 gpm
If you have a simplex single acting reciprocating pump
making 100 strokes/minute with a 6" diameter cylinder,
a 5" stroke, and operating with a 90% volumetric
efficiency, what is the capacity of this pump?
55 gpm
110 gpm
38 gpm
28 gpm
When a horizontal type centrifugal pump is used for
dewatering the engine room bilges, you would
__________.
I. use a rotary, liquid piston type pump to obtain a
prime
II. partially open the sea suction valve, then gradually
switch over to the required
I only
II only
Either I or II
Neither I nor II
The most cost-effective method of recovering refrigerant liquid pump
from a chiller with more than 5 lbs of refrigerant, to meet
EPA requirements is to use a __________.
vapor recovery
machine
liquid followed by
vapor recovery
vapor followed by
liquid recovery
If you have a simplex single acting reciprocating pump
making 100 strokes/minute with a 7" diameter cylinder,
a 9" stroke, and operating at a 90% volumetric
efficiency, what is the capacity of this pump?
233 gpm
135 gpm
67 gpm
270 gpm
The bitter end is the __________.
looped end of a
mooring cable
end of the chain
shackled to the
anchor
fixed end of the
end of the anchor
mooring cable
chain fastened to the
fastened to the
vessel
mooring winch drum
Which of the listed refrigerants has been more suitable
than the others for use in a centrifugal refrigeration
compressor?
P-tanks on board a supply boat are filled through the
__________.
R-12
R-11
Ammonia
Carbon dioxide
jet air or purge line
discharge line
fill line by gravity
pressurized fill line
202
Answer C
16.153 inches
Answer D
20.106 inches
Illustr
GS-0108
Book Num
11
11
11
2747
2748
2749
Ans
D
D
A
11
2750
B
11
2751
A
11
2752
B
11
2753
C
11
2754
B
11
2756
B
11
2757
A
11
2758
A
11
2759
C
11
2760
C
Question
An estimated 15% of all refrigerant emissions from
chillers occur during __________.
If you have a simplex single acting reciprocating pump
making 100 strokes/minute with a 7" diameter cylinder,
an 11" stroke, and operating with a 90% volumetric
efficiency, what is the capacity of this pump?
Answer A
servicing
Answer B
purging
Answer C
charging
Answer D
normal operation
165 gpm
330 gpm
407 gpm
82 gpm
If you have a simplex single acting reciprocating pump
making 100 strokes/minute with a 7" diameter cylinder,
a 12" stroke, and operating with a 90% volumetric
efficiency, what is the capacity of this pump?
90 gpm
180 gpm
360 gpm
529 gpm
If you have a simplex single acting reciprocating pump 390 gpm
making 100 strokes/minute with 7" diameter cylinder,
and a 13" stroke with a 90% volumetric efficiency, what
is the capacity of this pump?
97 gpm
672 gpm
195 gpm
In refrigeration systems, which type of contamination
will the reclamation process be unable to separate?
mixed refrigerants
acid
moisture
air
In the hydraulic anchor windlass system illustrated, if
the power to the electric motor is on, but the wildcat
does not turn, and pressure can not be developed on
either side of the system, the probable cause is the
__________.
What is the maximum volume to which refillable
refrigeration cylinders should be filled?
In addition to moisture, a refrigerant dehydrator charged
with silica gel is designed to absorb __________.
replenishing pump
coupling is broken
relief valve is not
closing
spring set point for "I"
manual transfer
valve is in the wrong is too low
position for the main
GS-0160
pump being operated
60% full
70% full
80% full
90% full
refrigerant
acids
noncondensable
gases
refrigerant oil
In checking the level of a tank, three pneumercator
readings have been taken. If each reading is higher
than the last, this indicates that __________.
excessive charging
air was supplied
insufficient charging the relief valve is
air has been supplied sticking
In a refrigeration system, The push-pull technique can
be used for the recovery of __________.
both liquid and vapor liquid only
vapor only
All of the links in the next to the last inboard shot of
chain are painted __________.
A rupture disc on a recovery tank for low pressure
refrigerants relieves at __________.
The reading on the micrometer scale shown in figure
"F" in the illustration is __________.
yellow
white
red
should never be
used with low
pressure systems
orange
1 psig
10 psig
15 psig
25 psig
0.120 inch
0.137 inch
0.148 inch
0.173 inch
203
Illustr
the tubing between
the tank and the
gauge has a leak
GS-0013
Book Num
11
11
2761
2762
Ans
C
D
11
2763
C
11
2764
A
11
2765
A
11
2766
B
11
2767
C
11
2768
A
11
2769
B
11
11
2770
2772
D
B
Question
If you have a simplex single acting reciprocating pump
making 100 strokes/minute with a 6" diameter cylinder,
a 14" stroke with a 90% volumetric efficiency, what is
the capacity of this pump?
Answer A
154 gpm
Answer B
840 gpm
Answer C
77 gpm
Answer D
308 gpm
If you have a simplex single acting reciprocating pump
making 100 strokes/minute with a 6" diameter cylinder,
a 13" stroke, at 90% volumetric efficiency, what is the
capacity of this pump?
When removing the primary refrigerant from a system
using water as a secondary refrigerant, it is important to
follow which procedure(s) to safeguard the equipment?
143 gpm
286 gpm
672 gpm
72 gpm
Insure that the water
doesn't become
contaminated with oil
in the direct contact
heat exchanger.
Insure that the water
and refrigerant
separator is
functioning properly.
Insure that the water
is drained or
continually circulating
to avoid freeze-up.
Leave some
refrigerant in the
system to prevent
the water from
contaminating the
refrigerant if there is
a leak.
In a vapor compression refrigeration system with a
freeze, dairy, and thaw box, a solenoid valve should be
installed __________.
Which of the listed components of the refrigeration
system shown in the illustration provides the functions
similar to an evaporator during the heating cycle of the
unit?
P-tanks are filled through the __________.
immediately before
each expansion
valve
The accumulator,
device "20".
on the inlet side of
the receiver
The condenser,
device "6".
in the liquid line
bypassing the
expansion valve
The receiver, device
"9".
in the vapor line
bypassing the oil
separator
The defrost pan
heater, device '26'.
discharge line
pressurized fill line
fill line by gravity
the hatch or manway
in the top of the tank
by gravity
All of the links in the last shot of anchor chain are
yellow
painted __________.
If you have a simplex single acting reciprocating pump 66 gpm
making 100 strokes/minute with a 6" diameter cylinder,
a 12" stroke with a volumetric efficiency of 90%, what is
the capacity of this pump?
white
red
orange
132 gpm
264 gpm
529 gpm
The rupture disc on a low pressure centrifugal unit
economizer
relieves pressure directly from the __________.
If a block and tackle arrangement were rigged as shown 79 lbs.
in figure "D" in the illustration, the amount of force "P"
required to hold the 396 pound load stationary would be
__________.
If you have a duplex single acting reciprocating pump
82 gpm
making 100 strokes/minute with a 7" diameter cylinder,
an 11" stroke and operating at a 90% volumetric
efficiency, what is the capacity of this pump?
chiller
condenser
compressor
98 lbs.
118 lbs.
132 lbs.
204
Illustr
RA-0018
GS-0110
165 gpm
330 gpm
407 gpm
Book Num
Ans
11
2773
C
11
2774
D
11
2775
D
11
2777
B
11
2779
D
11
2780
B
11
2781
C
11
2782
B
11
2783
A
11
2785
D
11
2786
B
Question
Answer A
If you have a duplex single acting reciprocating pump
360 gpm
making 100 strokes/minute, with a 7" diameter cylinder,
a 12" stroke and operating with 90% volumetric
efficiency, what is the capacity of this pump?
Answer B
90 gpm
The thermostat controlling the operation of the solenoid evaporator coil inlet
valve to a refrigerated box senses __________.
temperature
evaporator coil outlet compressor
temperature
discharge
temperature
8
18
Which of the listed item numbers represents the drip
pan heater used in the refrigeration system shown in
the illustration?
Charging liquid CFC-11 into a system under a heavy
vacuum could cause __________.
As shown in the illustration, a section of standard weight
seamless steel pipe, has an external diameter of 6.1
inches. When the pipe, is bent into a 90 degree turn,
the length of the out side edge of the curve "A-B" will
exceed the length of the inside edge of the curve "C-D"
by __________.
6
Answer C
180 gpm
Answer D
529 gpm
Illustr
the refrigerated box
temperature
26
RA-0018
the purge unit to
operate
6.189 inches
system secondary
refrigerant to freeze
7.291 inches
air and moisture to
enter the receiver
9.006 inches
rupture disk to
rupture
9.582 inches
GS-0108
If you have a duplex single acting reciprocating pump
77 gpm
making 100 strokes/minute, with a 6" diameter cylinder,
a 14" stroke and operating with 90% volumetric
efficiency, what is the capacity of this pump?
154 gpm
308 gpm
840 gpm
The EPA allows a large low pressure system to be
pressurized during repairs by __________.
adding nitrogen
adding heat with
controlled hot water
adding CFC-22
72 gpm
If you have a duplex single acting reciprocating pump
making 100 strokes/minute, with a 6" diameter cylinder,
a 13" stroke and operating with 90% volumetric
efficiency, what is the capacity of this pump?
143 gpm
286 gpm
672 gpm
number 1 and 2
In order to recognize the amount of anchor chain paid
shots of chain
out, specific portions of the chain are color coded and
wrapped with wire. A red painted detachable line would
be found between the __________.
number 2 and 3
shots of chain
number 3 and 4
shots of chain
all of the above
Which of the listed item numbers represents the low
24
pressure cutout of the refrigeration system shown in the
illustration?
Dust covers or plugs must be placed on all dry material maintain good
fill and discharge lines P-tanks to __________.
seamanship
28
29
30
adding excess
refrigerant
205
RA-0018
prevent moisture
from entering the
tank
prevent accidental
discharge on deck
prevent accidental
filling of the tank
Book Num
11
11
2787
2789
Ans
C
C
11
2790
D
11
2791
B
11
2792
D
11
2793
B
11
2794
C
11
2795
B
11
11
2796
2797
C
D
Question
Answer A
The high pressure cut-out switch used on refrigeration 1 psig
units for low pressure systems is set to shut off the
compressor at __________.
If you have a duplex single acting reciprocating pump
529 gpm
making 100 strokes/minute, with a 6" diameter cylinder,
a 12" stroke and operating with 90% volumetric
efficiency, what is the capacity of this pump?
Answer B
5 psig
Answer C
10 psig
Answer D
15 psig
66 gpm
132 gpm
264 gpm
If you have a duplex single acting reciprocating pump
242 gpm
making 100 strokes/minute, with a 6" diameter cylinder,
a 11" stroke and operating with 90% volumetric
efficiency, what is the capacity of this pump?
407 gpm
61 gpm
121 gpm
economizer
The inlet of the purge units used with some
compressors in low pressure refrigeration systems is
connected to the __________.
Which illustrated device would be best suited for
Figure A
measuring the flow rate of wet gases using a primary,
differential pressure, flow element?
98 gpm
If you have a duplex single acting reciprocating pump
making 100 strokes/minute, with a 6" diameter cylinder,
a 10" stroke and operating with 80% volumetric
efficiency, what is the capacity of this pump?
condenser
compressor
evaporator
Figure D
Figure E
All of the above
49 gpm
196 gpm
A properly adjusted thermostatic expansion valve will
supply pressure
have a constant valve opening under a condition of
constant __________.
Which of the listed item numbers represents the device 6
specifically termed the "heat exchanger" of the
refrigeration system shown in the illustration?
If you have a simplex single acting reciprocating pump 49 gpm
making 150 strokes/minute, with a 5" diameter cylinder,
a 4" stroke and operating with 97% volumetric
efficiency, what is the capacity of this pump?
suction pressure
refrigerant superheat compressor speed
13
18
99 gpm
25 gpm
32 gpm
If you have a simplex single acting reciprocating pump 92 gpm
making 200 strokes/minute, with a 5" diameter cylinder,
a 7" stroke and operating with 77% volumetric
efficiency, what is the capacity of this pump?
180 pm
183 gpm
46 gpm
206
Illustr
GS-0126
272 gpm
26
RA-0018
Book Num
Ans
11
2798
B
11
2799
C
11
11
11
2800
2801
2802
A
B
C
11
2803
C
11
2804
D
11
2805
C
11
2806
C
11
2807
D
11
2808
D
Question
In order to recognize the amount of anchor chain paid
out, specific portions of the chain are color coded and
wrapped with wire. The third shot of chain should have
__________.
Answer B
three turns of wire
wrapped around the
stud of the third link
on each side of the
detachable link
Answer C
three turns of wire
wrapped around the
stud of the link on
each side of the
detachable link
Answer D
one turn of wire
wrapped around the
stud of the third link
on each side of the
detachable link
Liquid recovery alone will typically remove the total
50%
refrigerant charge from a low pressure system up to
__________.
If you have a simplex single acting reciprocating pump 25 gpm
making 120 strokes/minute, with a 5" diameter cylinder,
a 6" stroke and operating with 81% volumetric
efficiency, what is the capacity of this pump?
60%
70%
75%
50 pm
59 gpm
96 gpm
If you have a duplex double acting reciprocating pump 61 gpm
making 100 strokes/minute, with a 6" diameter cylinder,
a 11" stroke and operating with 90% volumetric
efficiency, what is the capacity of this pump?
242 gpm
407 gpm
121 gpm
If you have a duplex double acting reciprocating pump 529 gpm
making 100 strokes/minute, with a 6" diameter cylinder,
a 12" stroke and operating with 90% volumetric
efficiency, what is the capacity of this pump?
132 gpm
264 gpm
66 gpm
If you have a duplex single acting reciprocating pump
15 gpm
making 120 strokes/minute, with a 5" diameter cylinder,
a 5" stroke and operating with 93% volumetric
efficiency, what is the capacity of this pump?
38 gpm
47 gpm
61 gpm
Hot gas bypass is one of the methods used to
__________.
produce flash gas at reduce flooding of
the expansion valve the receiver at low
loads
27
29
Which of the listed item numbers represents the liquid
line solenoid valve for the refrigeration system shown in
the illustration?
In order to recognize the amount of anchor chain paid
out, specific portions of the chain are color coded and
wrapped with wire. The second shot of the chain is
painted __________.
The rupture disc used on low pressure refrigerant
containers is set for __________.
A micrometer scale reading is indicated as 0.246 inches
and is represented in the illustration by __________.
Answer A
three turns of wire
wrapped around the
detachable link
relieve excessive
compressor head
pressure
22
Illustr
defrost the
evaporator coils
17
RA-0018
white on the
detachable link
red for two links on
either side of the
detachable link
white for two links on red on the
either side of the
detachable link
detachable link
1 psig
5 psig
10 psig
15 psig
Figure C
Figure D
Figure F
Figure I
GS-0013
207
Book Num
11
11
11
11
11
2809
2810
2811
2812
2813
Ans
A
A
B
C
D
11
2814
A
11
2815
D
11
2816
B
11
2817
C
11
2818
C
Question
Answer A
If a block and tackle arrangement were rigged as shown 141 lbs.
in figure "D" in the illustration, the amount of force "P"
required to hold the 423 pound load stationary would be
__________.
If you have a duplex single acting reciprocating pump
23 gpm
making 200 strokes/minute, with a 3" diameter cylinder,
a 4" stroke and operating with 93% volumetric
efficiency, what is the capacity of this pump?
Answer B
156 lbs.
Answer C
169 lbs.
Answer D
185 lbs.
11 gpm
40 gpm
46 gpm
If you have a duplex single acting reciprocating pump
39 gpm
making 100 strokes/minute, with a 6" diameter cylinder,
a 7" stroke and operating with 90% volumetric
efficiency, what is the capacity of this pump?
77 gpm
154 gpm
105 gpm
If you have a simplex single acting reciprocating pump 51 gpm
making 110 strokes/minute, with a 6" diameter cylinder,
a 5" stroke and operating with 91% volumetric
efficiency, what is the capacity of this pump?
61 gpm
31 gpm
123 gpm
In order to recognize the amount of anchor chain paid
out, specific portions of the chain are color coded and
wrapped with wire. The first shot of chain is painted
__________.
white on the
detachable link and
red on each link to
either side of the
detachable link
white on the
detachable link and
white on each link to
either side of the
detachable link
red on the
detachable link and
red on each link to
either side of the
detachable link
red on the
detachable link and
white on each link to
either side of the
detachable link
Which of the precautions listed should be taken before
opening any part of a refrigeration system?
Make certain that a
positive pressure
exists in the system
to prevent entrance
of moisture.
Find the leaks in the Set the high pressure Use the hot gas
system with a Halide cutout on manual to defrost line to
torch.
prevent automatic
remove frost on coils.
starting.
Which of the item numbers listed represents the
accumulator of the refrigeration system shown in the
illustration?
During normal operation, how is most of the refrigerant
released to the atmosphere from low pressure
systems?
A short weighted hose is attached to the end of the Ptank fixed discharge line on board a supply boat to
__________.
8
12
The reading on the micrometer scale shown in figure
"H" in the illustration is __________.
0.154 inch
Illustr
GS-0110
13
20
RA-0018
through water-side
systems
through the purge
unit
through a leaking
rupture disk
prevent accidental
maintain a nonprevent dry material
back flow of dry bulk vibrating delivery rate from being
material
discharged on deck
208
0.413 inch
0.438 inch
through the
compressor shaft
seal
All of the above
0.450 inch
GS-0013
Book Num
11
2819
Ans
B
11
2820
A
11
2822
D
11
2823
A
11
2824
B
11
2825
A
11
2826
A
11
2827
C
11
11
2828
2830
D
B
Question
A high reading is only indicated at the salinity cell
labeled "6" shown in the illustration. This would be the
probable result of __________.
Answer A
a minor tube leak in
the distillate
condenser in item
"III"
As shown in the illustration, a section of standard weight 10.367 inches
seamless steel pipe, has an external diameter of 6.6
inches. When the pipe, is bent into a 90 degree turn,
the length of the outside edge of the curve "A-B" will
exceed the length of the inside e
Answer B
a faulty cell at this
location
13.006 inches
Answer C
the compensating
temperature is set
too low for this cell
location
15.367 inches
Answer D
All of the above
Illustr
GS-0053
19.059 inches
GS-0108
The lathe tool shown as figure "O" in the illustration is
commonly used for __________.
Minor repairs may be performed on low pressure
refrigerant systems without recovering the refrigerant
charge if the pressure in the system is raised to
atmospheric. How may this be accomplished?
cutting acme threads left hand side facing
right hand turning
heat the refrigerant
pressurize the
charge the system
system with nitrogen until it is completely
filled with liquid
refrigerant
Before charging a refrigeration unit, the refrigerant
charging lines should be __________.
flushed with clean
refrigerant oil
purged with the
refrigerant
Which of the numbers listed represents the main
component of the refrigeration system, shown in the
illustration, used to determine whether the unit is to
operate in the cooling or heating mode?
Under what conditions would the oily-water separator
system illustrated fail to effectively process a mixture of
oily-water?
5
14
grooving
GS-0090
open the system vent
to the atmosphere
and allow the
pressure to equalize
washed with an
grounded to the
ammonia and alcohol compressor
solution
29
30
RA-0018
When the oily-water
mixture is an
emulsion the
effectiveness of the
separator is greatly
reduced.
In a low pressure refrigeration system, excessive
faulty purge system
running of the purge system generally indicates which
vent valve
probable condition?
If you have a duplex single acting reciprocating pump
28 gpm
making 100 strokes/minute, with a 6" diameter cylinder,
a 5" stroke and operating with 90% volumetric
efficiency, what is the capacity of this pump?
If you have a duplex single acting reciprocating pump
44 gpm
making 100 strokes/minute, with a 6" diameter cylinder,
a 8" stroke and operating with 90% volumetric
efficiency, what is the capacity of this pump?
209
Without detergents
the effectiveness of
the separator is
greatly reduced.
When there are
small air leaks in the
discharge piping, the
effectiveness of the
separator will greatly
reduced.
When the oily-water
separator is in the
process mode it will
effectively handle
emulsions.
overcharged system system leaks
high ambient
temperature
110 gpm
38 gpm
55 gpm
88 gpm
157 gpm
176 gpm
GS-0113
Book Num
Ans
11
2831
A
11
2832
A
11
2833
C
11
2834
B
11
2835
C
11
2836
Question
Design characteristics of lubricating oil sump tanks
include __________.
Answer A
Answer B
Answer C
installation of baffles sufficient capacity to cooling coils made of
to prevent excessive contain all the lube
welded seamless
sloshing of oil
oil in the system
steel pipe
except for the
contents of the
gravity tank
Answer D
insuring the bottom
of the sump is
integral with the shell
plating
Excessive moisture being collected in the purge unit of
a low pressure refrigeration system could indicate which
probable condition?
If a block and tackle arrangement were rigged as shown
in figure "D" in the illustration, the amount of force "P"
required to hold the 423 pound load stationary would be
__________.
Low side passive charging of a refrigeration system
may be speeded up by __________.
leaking condenser or low efficiency purge
chiller tubes
unit
dryer core needs
replacement
improper charging of
refrigerant
118 lbs.
141 lbs.
150 lbs.
Which of the numbers listed represents the equalizing
line shown in the illustration?
In a refrigeration system, what is meant by the term
'high efficiency purge unit?'
4
warming the service
cylinder with hot
water
11
Those purge units
which discharge the
highest percentage
of refrigerant with the
air being removed.
Those purge units
Those purge units
which discharge very which draw very little
little refrigerant with electrical power.
the air being
removed.
Those purge units
which need the least
amount of on-going
maintenance.
keep the end of the
hose under water
and prevent dust
from blowing on the
boat
2.4 tons
maintain a low
discharge flow rate
keep the end of the
fixed discharge line
from excessively
vibrating
All of the above
3.9 tons
3.1 tons
3.3 tons
If you have a duplex double acting reciprocating pump 672 gpm
making 100 strokes/minute, with a 7" diameter cylinder,
a 13" stroke and operating with 90% volumetric
efficiency, what is the capacity of this pump?
195 gpm
970 gpm
390 gpm
If you have a duplex double acting reciprocating pump 308 gpm
making 100 strokes/minute, with a 6" diameter cylinder,
a 14" stroke and operating with 90% volumetric
efficiency, what is the capacity of this pump?
154 gpm
77 gpm
840 pm
B
11
2837
A
A short, weighted hose is attached to the end of the Ptank fixed discharge line on board a supply boat to
__________.
11
2838
A
If your vessel burns 5 tons of fuel per hour at 23 knots,
how many tons per hour will it burn at 18 knots?
11
11
2839
2840
D
A
127 lbs.
Illustr
GS-0110
warming the service
cylinder with a torch
210
inverting the service
cylinder
inclining the service
cylinder
16
19
RA-0018
Book Num
11
2841
Ans
B
Question
Answer A
If you have a duplex double acting reciprocating pump 143 gpm
making 100 strokes/minute, with a 6" diameter cylinder,
a 13" stroke and operating with 90% volumetric
efficiency, what is the capacity of this pump?
Answer B
286 gpm
Answer C
726 gpm
Answer D
672 gpm
If you have a duplex single acting reciprocating pump
23 gpm
making 150 strokes/minute, with a 4" diameter cylinder,
a 6" stroke and operating with 95% volumetric
efficiency, what is the capacity of this pump?
34 gpm
47 gpm
93 gpm
raise the pressure in
the system above
atmospheric
a large flame is more
sensitive than a
small flame
cool the refrigerant
add HCFC-22 to the
system
The refrigerant is
heavier than air and
will be detected
below the leak
all of the above
27
29
30
11
2842
C
11
2843
B
What must be done to use standard leak detection
methods on a low pressure refrigeration system?
When using the test set up shown in the illustrated to
find a leak in an evaporator coil, it is important to
remember that __________.
11
2844
C
11
2845
A
11
2846
B
11
2847
D
11
2848
D
11
2851
D
11
2853
B
11
2854
C
lower the pressure in
the system below
atmospheric
the flame will turn
blue in the presence
of a refrigerant
Which of the item numbers listed represents the device 24
used to activate the three way valve of the refrigeration
system shown in the illustration?
The reading on the micrometer scale shown in figure "I" 0.220 inch
in the illustration is __________.
If you have a duplex double acting reciprocating pump 105 gpm
making 180 strokes/minute, with a 4" diameter cylinder,
a 12" stroke and operating with 89% volumetric
efficiency, what is the capacity of this pump?
Illustr
RA-0004
RA-0018
0.246 inch
0.250 inch
0.253 inch
314 gpm
52 gpm
209 gpm
GS-0013
While the illustrated system is operated at sea the
strainer in line "4" becomes fouled, this will result in
__________.
a significant
pump "K" becoming
reduction in distillate vapor bound
production
the temperature
regulated by "L"
difficult to maintain
nothing unusual for
the area of operation
GS-0053
indicated
Which of the figures in illustration GS-0080 would be
used in conjunction with figure "C" in illustration GS0015?
As shown in the illustration, a section of standard
weight, seamless steel pipe, has an external diameter
of 5.2 inches. When the pipe, is bent into a 90 degree
turn, the length of the outside edge of the curve "A-B"
will exceed the length of the inside
A quick method used to test a water cooled condenser
for refrigerant leaks is to test the __________.
figure A
figure F
figure K
figure D
GS-0080
7.980 inches
8.168 inches
13.168 inches
16.127 inches
GS-0108
cooling water for
proper pH
211
receiver for water
content
air vents on the
condenser heads
with a halide torch
condenser tubes
hydrostatically
Book Num
11
11
11
2855
2856
2857
Ans
B
D
C
11
2858
A
11
2859
C
11
11
11
11
2860
2861
2862
2864
C
Question
Answer A
Which of the item numbers listed represents the device 24
used to prevent refrigerant flow into the 'drip pan heater'
during normal cooling periods of the refrigeration
system shown in the illustration?
If you have a duplex single acting reciprocating pump
25 gpm
making 150 strokes/minute, with a 5" diameter cylinder,
a 4" stroke and operating with 97% volumetric
efficiency, what is the capacity of this pump?
C
Answer C
29
Answer D
RA-0018
32 gpm
Why is a short, weighted hose attached and secured to To keep the end of
the end of the fixed discharge line from a supply boat P- the hose from lifting
tank?
off the deck of the
supply boat.
To keep down the
discharge flow rate.
To prevent injury
All of the above
when pressurized air
discharges from the
open end of the hose
92 gpm
If you have a duplex single acting reciprocating pump
making 200 strokes/minute, with a 5" diameter cylinder,
a 7" stroke and operating with 77% volumetric
efficiency, what is the capacity of this pump?
46 gpm
180 gpm
183 gpm
If your vessel burns 6 tons of fuel per hour at 22 knots,
how many tons per hour will it burn at 17 knots?
3.9 tons
2.8 tons
1.7 tons
If you have a duplex double acting reciprocating pump 98 gpm
making 100 strokes/minute, with a 6" diameter cylinder,
a 10" stroke and operating with 80% volumetric
efficiency, what is the capacity of this pump?
272 gpm
196 gpm
49 gpm
All watertight doors and watertight hatches on small
passenger vessels of less than 100 gross tons are
required to be marked in letters __________.
not to exceed 1-inch of at least 1-inch,
'watertight door-close 'emergency exit,
in emergency' or
keep clear'
'watertight hatchclose in emergency'
not to exceed 1-inch,
'emergency exit,
keep clear'
If you have a duplex double acting reciprocating pump 12 gpm
making 150 strokes/minute, with a 4" diameter cylinder,
a 6" stroke and operating with 95% volumetric
efficiency, what is the capacity of this pump?
25 gpm
50 gpm
93 gpm
Which of the processes listed would be the most
satisfactory method to use to lower the humidity of the
air being circulated by an air conditioning system?
Heating the air to a
point at which
moisture will boil off,
then recooling it.
Cooling the air to a
point below dew
point, then reheating
it.
Heating the air and
then cooling it to a
point below dew
point.
4.6 tons
of at least 1-inch,
'watertight door-close
in an emergency' or
'watertight hatchclose in emergency'
Cooling the air to a
temperature just
above dew point.
212
Illustr
30
99 gpm
A
D
Answer B
27
49 gpm
Book Num
11
2866
Ans
A
11
2867
B
11
2868
A
11
11
11
11
11
11
2869
2870
2871
2872
2873
2874
A
B
D
C
D
B
Question
Answer A
If you have a duplex double acting reciprocating pump 107 gpm
making 170 strokes/minute, with a 4" diameter cylinder,
a 6" stroke and operating with 96% volumetric
efficiency, what is the capacity of this pump?
Answer B
53 gpm
Answer C
80 gpm
Answer D
27 gpm
If you have a duplex double acting reciprocating pump 49 gpm
making 150 strokes/minute, with a 5" diameter cylinder,
a 4" stroke and operating with 97% volumetric
efficiency, what is the capacity of this pump?
99 gpm
32 gpm
25 gpm
If the discharge valves on a refrigeration compressor
are leaking slightly, the compressor will __________.
run continuously
not start
short cycle on the
high pressure switch
In the illustration, the item labeled as '27' is
__________.
I. used to vent off air from the casing
II. to supply sealing water to the stuffing box
If a block and tackle arrangement were rigged as shown
in figure "G" in the illustration, the amount of force "P"
required to hold the 236 pound load stationary would be
__________.
According to the Regulations, all escape hatches and
other emergency exits on small passenger vessels of
less than 100 gross tons shall be marked on
__________.
I only
II only
short cycle on the
water low pressure
switch
Both I and II
Illustr
Neither I nor II
GS-0012
47 lbs.
59 lbs.
79 lbs.
94 lbs.
GS-0110
exterior side only, in
at least 2-inch letters
'emergency exit-keep
clear'
both sides, in at least
2-inch letters
'watertight door-close
in emergency'
both sides, in at least
2-inch letters
'emergency exit-keep
clear'
If you have a duplex double acting reciprocating pump 46 gpm
making 200 strokes/minute, with a 5" diameter cylinder,
a 7" stroke and operating with 77% volumetric
efficiency, what is the capacity of this pump?
92 gpm
183 gpm
180 gpm
If you have a simplex single acting reciprocating pump 25 gpm
making 120 strokes/minute, with a 5" diameter cylinder,
a 6" stroke and operating with 81% volumetric
efficiency, what is the capacity of this pump?
59 gpm
50 gpm
99 gpm
A cargo hold has been determined to have a relative
humidity of 80% and a dry bulb temperature of 85° F.
When the hold is closed and the dry bulb temperature
decreases, the relative humidity in the space will
__________.
increase
decrease to zero
remain unchanged
exterior side, in less
than 2-inch letters
'watertight openingkeep clear'
decrease
213
Book Num
11
2875
Ans
B
11
2876
C
11
2878
C
11
2879
B
11
11
2880
2881
A
B
11
2882
C
11
2883
C
11
2884
C
Question
Answer A
If you have a duplex double acting reciprocating pump 11 gpm
making 200 strokes/minute, with a 3" diameter cylinder,
a 4" stroke and operating with 93% volumetric
efficiency, what is the capacity of this pump?
Answer B
46 gpm
Answer C
23 gpm
Answer D
40 gpm
If you have a duplex double acting reciprocating pump 39 gpm
making 100 strokes/minute, with a 6" diameter cylinder,
a 7" stroke and operating with 90% volumetric
efficiency, what is the capacity of this pump?
77 gpm
154 gpm
175 gpm
When a P-tank has been properly emptied, the tank
pressure will immediately __________.
If your vessel burns 8 tons of fuel per hour at 15 knots,
how many tons per hour will it burn at 19 knots?
decrease to 35-37
psi
16.3 tons
decrease to 3-5 psi
increase to 35-37 psi
10.6 tons
10.1 tons
If you have a simplex single acting reciprocating pump 110 gpm
making 100 strokes/minute, with a 6" diameter cylinder,
a 5" stroke and operating with 90% volumetric
efficiency, what is the capacity of this pump?
28 gpm
55 gpm
38 gpm
If you have a duplex double acting reciprocating pump 31 gpm
making 110 strokes/minute, with a 6" diameter cylinder,
a 5" stroke and operating with 91% volumetric
efficiency, what is the capacity of this pump?
123 gpm
61 gpm
51 gpm
If you have a duplex double acting reciprocating pump 22 gpm
making 100 strokes/minute, with a 6" diameter cylinder,
a 4" stroke and operating with 90% volumetric
efficiency, what is the capacity of this pump?
44 gpm
88 gpm
20 gpm
If your vessel burns 8 tons of fuel per hour at 15 knots,
how many tons per hour will it burn at 20 knots?
10.7 tons
19.0 tons
14.2 tons
partially opened
liquid service valve
reduction in
condenser air flow
(dirty condenser)
fully closed
discharge service
valve
increase to 3-5 psi
12.8 tons
11.7 tons
The compressor used in an air-cooled air conditioning
loosely fitted
system is short cycling. A service check determines the compressor drive
suction pressure is above the normal cut-in point with
belt
an exceptionally high head pressure and high superheat
at the evaporator. This is probably a result of a
__________.
214
Illustr
Book Num
11
11
2885
2886
Ans
D
A
11
2887
B
11
2889
D
11
2890
D
11
2891
A
11
2892
B
11
2893
C
11
2894
C
Question
Answer A
When repairing a refrigeration system, a swedge would Swedges are used to
be used to carry out which of the following operations? remove any sweated
edges formed on the
tubing while
soldering.
Answer B
Swedges are used
during the breakingin of refrigeration
compressors and
drive motors.
Answer C
A swedge is no
longer used with
repairing refrigeration
systems due to
progressive changes
in the tool industry.
Answer D
Swedges can be
used to expand an
end of one tube to fit
onto a tube of the
same external
diameter.
If you have a duplex double acting reciprocating pump 270 gpm
making 100 strokes/minute, with a 7" diameter cylinder,
a 9" stroke and operating with 90% volumetric
efficiency, what is the capacity of this pump?
67 gpm
135 gpm
223 gpm
If you have a duplex double acting reciprocating pump 82 gpm
making 100 strokes/minute, with a 7" diameter cylinder,
a 11" stroke and operating with 90% volumetric
efficiency, what is the capacity of this pump?
330 gpm
165 gpm
407 gpm
One of the primary steps in assisting someone who has loosen all clothing
been overcome by ammonia vapors is to __________.
provide the victim
with smelling salts
rinse the affected
area with water
give the patient
plenty of fresh air
25 gpm
If you have a duplex single acting reciprocating pump
making 120 strokes/minute, with a 5" diameter cylinder,
a 6" stroke and operating with 81% volumetric
efficiency, what is the capacity of this pump?
99 gpm
59 gpm
50 gpm
constant viscosity
lubrication
46.3 gpm
a minimum of 15 psi
to all parts of the
system
85 gpm
The lubrication of a precision high speed bearing
depends upon a system that produces __________.
If you have a simplex single acting reciprocating pump
making 110 strokes/minute, with a 5" diameter cylinder,
a 10" stroke and operating with 91% volumetric
efficiency, what is the capacity of this pump?
adequate quantity at high detergent oil
sufficient pressure
with pressure
additives
21.3 gpm
42.5 gpm
If you have a simplex single acting reciprocating pump 36 gpm
making 140 strokes/minute, with a 4" diameter cylinder,
a 5" stroke and operating with 94% volumetric
efficiency, what is the capacity of this pump?
45 gpm
18 gpm
72 gpm
In a two stage centrifugal air conditioning system, the
evaporator
liquid refrigerant passes through the condenser directly
to the __________.
chiller
economizer
expansion valve
215
Illustr
Book Num
11
2895
Ans
D
11
2896
A
11
2897
D
11
2898
C
11
2899
B
11
2900
C
11
2901
A
11
11
11
2902
2903
2904
C
D
C
Question
Answer A
If you have a simplex single acting reciprocating pump 14 gpm
making 120 strokes/minute, with a 3" diameter cylinder,
a 4" stroke and operating with 95% volumetric
efficiency, what is the capacity of this pump?
Answer B
28 gpm
Answer C
19 gpm
Answer D
7 gpm
If you have a simplex single acting reciprocating pump 43 gpm
making 110 strokes/minute, with a 6" diameter cylinder,
a 7" stroke and operating with 91% volumetric
efficiency, what is the capacity of this pump?
86 gpm
100 gpm
172 gpm
If a refrigeration compressor were short cycling on the
low pressure cutout switch, the cause might be that the
__________.
When all of the dry bulk material has been delivered
from a P-tank, it should be blown out by repressurizing
to __________.
If you have a simplex single acting reciprocating pump
making 110 strokes/minute, with a 6" diameter cylinder,
a 5" stroke and operating with 91% volumetric
efficiency, what is the capacity of this pump?
system was
overcharged with
refrigerant
5-10 psi
system was low on
oil
suction valves were
leaking slightly
system was low on
refrigerant
10-15 psi
25-30 psi
40-50 psi
51 gpm
31 gpm
61 gpm
123 gpm
If you have a simplex single acting reciprocating pump 33 gpm
making 110 strokes/minute, with a 6" diameter cylinder,
a 4" stroke and operating with 91% volumetric
efficiency, what is the capacity of this pump?
49 gpm
25 gpm
98 gpm
Considering equal capacities, which refrigeration
Ammonia
system can employ the smallest compressor?
If a block and tackle arrangement were rigged as shown 13 lbs.
in figure "G" in the illustration, the amount of force "P"
required to hold the 254 pound load stationary would be
__________.
If you have a simplex single acting reciprocating pump 82 gpm
making 130 strokes/minute, with 5" diameter cylinder, a
8" stroke and operating with 93% volumetric efficiency,
what is the capacity of this pump?
Carbon Dioxide
Dichlorodifluorometh Monochlorodifluorom
ane
ethane
64 lbs.
102 lbs.
The primary purpose of the thermostatic expansion
valve as used in most refrigeration plants is to
__________.
43 lbs.
GS-0110
132 gpm
regulate refrigerant ensure that liquid
passage through the refrigerant returning
solenoid valve
to the compressor
has the proper
superheat
216
Illustr
164 gpm
41 gpm
maintain a constant
degree of superheat
at the evaporator coil
outlet
maintain constant
evaporator coil
pressure
independent of
suction pressure
variations
Book Num
11
11
11
11
11
11
11
11
2905
2906
2907
2908
2909
2910
2911
2912
Ans
C
A
D
B
C
D
A
B
Question
In a refrigeration system, once the compound gage
manifold lines are attached to the service connections,
you should ascertain that the valves on the gage
manifold are closed, and then __________.
Answer A
open the discharge
valve service port by
closing the service
valve
Answer B
continue to backseat
the discharge service
valve by turning it
clockwise
Answer C
open the discharge
valve service port by
closing the service
valve approximately
1/4 to 1/2 of a turn
Answer D
open only the valve
connected to the
discharge service
fitting on the outlet of
the king valve
75 gpm
151 gpm
303 gpm
If R-502, which is a mixture comprised of 48.8% R-22
either R-22 or R-115 R-22 only
and 51.2% R-115, is recovered from a refrigeration
system, it must be placed in a recovery tank containing
__________.
120 gpm
If you have a simplex single acting reciprocating pump 240 gpm
making 110 strokes/minute, with a 8" diameter cylinder,
a 11" stroke and operating with 91% volumetric
efficiency, what is the capacity of this pump?
R-115 only
R-502 only
329 gpm
479 gpm
If you have a simplex single acting reciprocating pump 225 gpm
making 110 strokes/minute, with a 6" diameter cylinder,
a 12" stroke and operating with 91% volumetric
efficiency, what is the capacity of this pump?
113 gpm
74 gpm
56 gpm
If you have a simplex single acting reciprocating pump 159 gpm
making 110 strokes/minute, with a 6" diameter cylinder,
a 13" stroke and operating with 91% volumetric
efficiency, what is the capacity of this pump?
345 gpm
319 gpm
80 gpm
If you have a simplex single acting reciprocating pump 86 gpm
making 110 strokes/minute, with a 6" diameter cylinder,
a 14" stroke and operating with 91% volumetric
efficiency, what is the capacity of this pump?
172 gpm
343 gpm
400 gpm
If you have a simplex single acting reciprocating pump 217 gpm
making 110 strokes/minute, with a 7" diameter cylinder,
a 13" stroke and operating with 91% volumetric
efficiency, what is the capacity of this pump?
108 gpm
403 gpm
434 gpm
If you have a simplex single acting reciprocating pump 55 gpm
making 110 strokes/minute, with a 6" diameter cylinder,
a 9" stroke and operating with 91% volumetric
efficiency, what is the capacity of this pump?
217
Illustr
Book Num
11
2914
Ans
C
11
2915
C
11
2916
A
11
11
11
11
2917
2918
2919
2922
C
B
A
D
11
2923
A
11
2924
C
Question
The primary purpose of the thermostatic expansion
valve in a typical multi-box shipboard refrigeration
system is to __________.
Answer A
control the
refrigerated space
temperature
Answer B
regulate the
compressor suction
pressure
Answer C
regulate the amount
of refrigerant
superheat leaving
the evaporator
Answer D
control the refrigerant
temperature entering
the evaporator
When purging a refrigeration gage manifold, which of
the fittings listed is normally tightened last?
The hose fitting at
the discharge valve
is tightened last after
purging the low
pressure line.
The fittings at the
discharge and
suction valves of the
compressor are both
closed
simultaneously to
prevent objective
cross flows.
The hose fitting at
the suction service
valve is tightened
last after purging the
center connection.
The low pressure
hose fitting at the
gage manifold is the
only fitting that is
connected first and
tightened last.
cutting-off tools
parting tools
204 gpm
51 gpm
universal turning
tools
245 gpm
repressurized and
blown out with the
discharge hoses
disconnected
reclaimed
repressurize and
blown out with the
discharge hoses
connected
recycled
allowed to stand
empty, but
pressurized until
refilled
destroyed
If you have a duplex single acting reciprocating pump
120 gpm
making 110 strokes/minute, with a 8" diameter cylinder,
a 11" stroke and operating with 91% volumetric
efficiency, what is the capacity of this pump?
329 gpm
479 gpm
240 gpm
If you have a duplex single acting reciprocating pump
113 gpm
making 120 strokes/minute, with a 5" diameter cylinder,
a 12" stroke and operating with 92% volumetric
efficiency, what is the capacity of this pump?
56 gpm
225 gpm
270 gpm
One benefit of proper air circulation in a refrigerated
cargo space is __________.
increased moisture
content
reduced slime and
mold
increased density of
the air
The lathe tools shown as figure "M" in the illustration
forming tools
are commonly known as __________.
If you have a simplex single acting reciprocating pump 102 gpm
making 110 strokes/minute, with a 5" diameter cylinder,
a 12" stroke and operating with 91% volumetric
efficiency, what is the capacity of this pump?
As soon as all of the pulverized material has been
discharged from a P-tank, the tank should be
__________.
vented and
depressurized
The prohibition against the venting of halogenated floro- recovered
carbon refrigerants to the atmosphere requires that, at a
minimum, the refrigerant must be __________.
more temperature
differential
218
Illustr
GS-0090
Book Num
11
2925
Ans
D
11
2926
C
11
2927
B
11
11
11
11
2928
2929
2930
2931
A
B
C
D
11
2932
A
11
2934
C
Question
Answer A
Answer B
Answer C
Valve "10" in the refrigeration system shown in the
Compressor
Condenser check
Heat exchanger, item
illustration is known to close effectively. The low side of discharge valves are valve, item "7" has a "13" has an internal
the system is pumped down and the compressor is off. not sealing properly. defective valve seat. leak.
The suction pressure gage initially indicates a vacuum,
but slowly increases to '0' psig
Answer D
Illustr
There is a small leak
at the dehydrator
fittings indicated by
the presence of
RA-0018
minute quantities of
oil.
As shown in the illustration, a section of standard
5.246 inches
weight, seamless steel pipe, has an external diameter
of 4.6 inches. When the pipe, is bent into a 90 degree
turn, the length of the outside edge of the curve "A-B"
will exceed the length of the inside edge of the curve "CD" by __________.
7.435 inches
6.113 inches
GS-0108
If solenoid "A" illustrated is energized, the __________. pump should reverse cylinder should
the direction of flow extend
If a block and tackle arrangement were rigged as shown 74 lbs.
in figure "G" in the illustration, the amount of force "P"
required to hold the 294 pound load stationary would be
__________.
If you have a duplex single acting reciprocating pump
80 gpm
making 110 strokes/minute, with a 6" diameter cylinder,
a 13" stroke and operating with 92% volumetric
efficiency, what is the capacity of this pump?
7.226 inches
90 lbs.
pump should
discharge directly to
the reservoir
98 lbs.
cylinder should
retract
118 lbs.
GS-0110
161 gpm
319 gpm
345 gpm
86 gpm
If you have a duplex single acting reciprocating pump
making 110 strokes/minute, with a 6" diameter cylinder,
a 14" stroke and operating with 91% volumetric
efficiency, what is the capacity of this pump?
343 gpm
172 gpm
400 gpm
If you have a duplex single acting reciprocating pump
108 gpm
making 110 strokes/minute, with a 7" diameter cylinder,
a 13" stroke and operating with 91% volumetric
efficiency, what is the capacity of this pump?
434 gpm
403 gpm
217 gpm
If you have a duplex single acting reciprocating pump
102 gpm
making 110 strokes/minute, with a 5" diameter cylinder,
a 12" stroke and operating with 91% volumetric
efficiency, what is the capacity of this pump?
51 gpm
204 gpm
245 gpm
Which of the lettered items correctly identifies the parts
of the refrigeration valve shown in the illustration?
A-front seat, C-back D-front seat, EA-seal cap, D-front
seat, and D-seal cap normal outlet, and G- seat, and F-gage
valve packing
connection
219
GS-0041
B-valve stem, C-front
seat, and F-packing RA-0008
gland
Book Num
11
11
11
11
11
2935
2936
2937
2938
2939
Ans
C
B
C
D
2940
A
11
2941
C
2942
Answer C
Check valve, item
'27' has acquired
foreign matter
preventing it from
closing.
Answer D
Dehydrator, item "12"
is clogged and
requires changing.
If you have a duplex single acting reciprocating pump
67 gpm
making 110 strokes/minute, with a 5" diameter cylinder,
a 10" stroke and operating with 90% volumetric
efficiency, what is the capacity of this pump?
84 gpm
245 gpm
270 gpm
If you have a duplex single acting reciprocating pump
23 gpm
making 110 strokes/minute, with a 5" diameter cylinder,
a 10" stroke and operating with 91% volumetric
efficiency, what is the capacity of this pump?
42 gpm
85 gpm
179 gpm
If you have a simplex single acting reciprocating pump 107 gpm
making 170 strokes/minute, with a 4" diameter cylinder,
a 6" stroke and operating with 91% volumetric
efficiency, what is the capacity of this pump?
80 gpm
53 gpm
25 gpm
An example of a small refrigeration appliance identified
as TYPE I, is __________.
a cargo container
refrigerant system
containing 4.9 lbs of
refrigerant.
each of the above
a 25 ton air
answers is correct
conditioning plant
provided it does not
meet the criteria for a
TYPE II appliance.
If you have a simplex single acting reciprocating pump 25 gpm
making 170 strokes/minute, with a 5" diameter cylinder,
a 4" stroke and operating with 85% volumetric
efficiency, what is the capacity of this pump?
39 gpm
49 gpm
98 gpm
The purpose of nozzles in a liquid mud system is
to_________.
clean the mud from
the bottom of the
tank
26 gpm
circulate the mud to
prevent barite from
settling
72 gpm
Prevent barite from
damaging the pump
A
11
11
Question
Answer A
Answer B
The refrigeration system shown in the illustration is
There is a discernible The system contains
pumped down and the compressor is cycled off. The
hole in the suction
excessive refrigerant.
compressor suction and discharge valves and valve
piping.
"10" have been checked and found to be in good order.
Which of the problems listed is indicated if the suction
pressure rises rapidly from a vacuum to above
atmospheric pressure?
B
If you have a simplex single acting reciprocating pump
making 110 strokes/minute, with a 5" diameter cylinder,
a 7" stroke and operating with 79% volumetric
efficiency, what is the capacity of this pump?
A water cooler with
four pounds of
refrigerant
aerate the mud to
insure proper oxygen
content
52 gpm
220
Illustr
RA-0018
103 gpm
Book Num
Ans
11
2943
C
11
2944
D
11
11
11
2945
2946
2947
D
C
A
Question
Answer A
If you have a duplex double acting reciprocating pump 79 gpm
making 130 strokes/minute, with a 4" diameter cylinder,
a 12" stroke and operating with 93% volumetric
efficiency, what is the capacity of this pump?
Answer B
237 gpm
Answer C
158 gpm
Answer D
39 gpm
The high pressure cutout switch will stop the
refrigeration centrifugal compressor when there is
__________.
The refrigeration system shown in the illustration has
been operating in the cooling mode for twenty minutes
and has not entered the programmed defrost period.
Which of the following is indicated if the line marked '25'
feels hot, even though the box temperature has been
gradually decreasing?
fouled condenser
tubes
excessive air in the
system
all of the above
If you have a duplex double acting reciprocating pump 44 gpm
making 160 strokes/minute, with a 4" diameter cylinder,
a 12" stroke and operating with 94% volumetric
efficiency, what is the capacity of this pump?
2948
B
11
2949
C
11
11
2952
2953
C
D
Drip pan heater, item Solenoid valve, item Three way valve,
'26' is no longer
"24" is operating
item "5" is not
melting ice.
correctly and is
seating properly.
opened.
98 gpm
196 gpm
RA-0018
266 gpm
What three (3) types of drilling fluids can be transported water based mud, oil salt water mud, fresh offshore mud, inland barite, oil and zinc
water mud and
mud and dry
bromide
by an OSV?
based mud and
correction fluids
chemicals
completion fluids
The operation of a P-tank depends upon __________.
11
a stoppage of
condenser cooling
water flow
Check valve, item
'27' is leaking.
Illustr
liquefying the dry
bulk material
A micrometer scale reading is indicated as 0.349 inches Figure A
and is represented in the illustration by __________.
directing the bulk
material to a central
discharge point
within the pressure
vessel
Figure B
providing a central
suction point to the
liquid mud pump
All of the above
Figure C
Figure G
GS-0013
Which of the following steps should be taken before
Flood the tanks with
taking on a load of liquid mud for transport to a MODU? carbon dioxide and
test product with an
explosimeter (gas
detector)
Test a sample to
insure that the
emulsifying amines
do not exceed a
STEL of 25 ppm.
Insure that the sea
All of the above.
chest valve is closed
and not leaking.
If a block and tackle arrangement were rigged as shown 54 lbs.
in figure "G" in the illustration, the amount of force "P"
required to hold the 334 pound load stationary would be
__________. (See illustration GS-0110)
61 lbs.
77 lbs.
221
84 lbs.
GS-0110
Book Num
11
11
11
11
11
11
2954
2955
2956
2957
2958
2960
Ans
Question
An economizer, or heat interchanger, is installed in a
refrigeration system to __________.
Answer A
Answer B
reduce the possibility reduce the
of sweating of the
temperature of liquid
suction line
refrigerant prior to
entering the
expansion valve
Answer C
Answer D
reduce the possibility all of the above
of liquid refrigerant
flooding back to the
compressor
The refrigeration system shown in the illustration is
operating in the cooling mode. The discharge head
pressure is slightly above normal and the suction
pressure is lower than normal, with the ball in the sight
glass floating high. Which of the following indicates the
probable cause?
There is a restriction There is a restriction
at the three way
at the pilot valve
valve.
controlling the three
way valve.
The condenser
check valve is not
operating correctly
causing the
condenser coils to
become flooded.
There is a restriction
in the liquid line.
314 gpm
D
D
B
B
C
B
11
2961
D
11
2962
B
11
2964
C
Illustr
RA-0018
If you have a simplex single acting reciprocating pump 209 gpm
making 180 strokes/minute, with a 4" diameter cylinder,
a 12" stroke and operating with 89% volumetric
efficiency, what is the capacity of this pump?
52 gpm
105 gpm
Federal regulations permit refrigerant to be released to
the atmosphere under which conditions?
When release is
considered 'De
Minimis'.
When adding oil to a During replacement
compressor.
of a compressor.
71 gpm
30 gpm
119 gpm
The separator
operation would stall
as a result of oil
remaining on the
longer probe of item
"S".
The separator
operation would stall
do to the presence of
water at the shorter
probe of item "S".
The separator
operation would
continue as valve
'V4' is only used
during the remote
manual mode.
If you have a duplex single acting reciprocating pump
59 gpm
making 180 strokes/minute, with a 4" diameter cylinder,
a 5" stroke and operating with 96% volumetric
efficiency, what is the capacity of this pump?
24 gpm
94 gpm
47 gpm
In the hydraulic schematic illustrated, the pump symbol
indicates the use of a __________.
constant flow gear
type pump
constant flow screw
type pump
bi-directional rotating
constant flow pump GS-0041
The amount of refrigerant in a storage cylinder is
measured by __________.
pressure
constant flow pump
of indefinite
construction
volume
weight
temperature
If you have a simplex single acting reciprocating pump
making 140 strokes/minute, with a 5" diameter cylinder,
a 6" stroke and operating with 83% volumetric
efficiency, what is the capacity of this pump?
If valve 'V2A' in the illustration does not open when the
oily-water separator shifts into the oil discharge mode,
which of the following statements describes what would
occur?
When testing a
system for leaks
using R-12 and
nitrogen.
59 gpm
Backflush water
would cause the oil
accumulated in the
upper section of the
tank to be forced
back into the bilge
spaces.
222
GS-0113
Book Num
11
11
11
11
11
2965
2966
2967
2969
2970
Ans
D
C
Question
Which of the conditions listed would indicate the
refrigeration system shown in the illustration is
insufficiently charged?
Answer B
A suction pressure
whose saturation
temperature is equal
to the existing box
temperature.
Answer C
Answer D
The existence of, or All of the above.
the ability to develop,
a 150 psi head
pressure.
If you have a duplex single acting reciprocating pump
626 gpm
making 180 strokes/minute, with a 6" diameter cylinder,
a 14" stroke and operating with 87% volumetric
efficiency, what is the capacity of this pump?
134 gpm
268 gpm
537 gpm
Newly developed refrigerants, used to reduce
stratospheric ozone depletion, are sometimes referred
to as azeotropic. This means that the resulting
liquid_________.
will condense at a
temperature lower
than the boiling point
of the component
with the lowest
boiling point
boils at a
temperature equal to
the boiling point of
the component with
the lowest boiling
point
will condense at a
temperature equal to
the highest
condensation point of
the component with a
condensation point
equal to any one of
the components
boils at a
temperature
independent of any
individual
components in the
mixture
When checking the level of a fuel oil tank using a
pneumercator, the initial reading obtained can be
quickly verified by __________.
repeating the
process and getting
the same reading
again
sounding the tank
with a tape coated
with a fuel indicating
paste
a gauge reading of
zero when the control
handle is in the
purge position
If you have a duplex double acting reciprocating pump 39 gpm
making 110 strokes/minute, with a 5" diameter cylinder,
a 10" stroke and operating with 83% volumetric
efficiency, what is the capacity of this pump?
67 gpm
135 gpm
a gauge reading
equal to supply air
pressure when the
control handle is in
the purge position
155 gpm
If you have a duplex single acting reciprocating pump
30 gpm
making 130 strokes/minute, with a 3" diameter cylinder,
a 5" stroke and operating with 91% volumetric
efficiency, what is the capacity of this pump?
9 gpm
36 gpm
18 gpm
D
A
D
11
2971
D
11
2972
A
11
2973
C
11
2974
B
Answer A
The position of the
floating ball in the
receiver tank sight
glass.
In the illustrated system, what pressure will be indicated 800 psi
8,000 psi
80,000 psi
on the gauge if the load (x) is 8000 lbs and the piston
area is 10 sq. in?
If solenoid "A" of the valve illustrated is energized, the
extend with rate of
retract with rate of
extend with rate of
cylinder will __________.
movement controlled movement controlled movement
uncontrolled
Dehydrators are usually located in the liquid line of
remove oil from the prevent icing of the reduce compressor
refrigeration systems in order to __________.
refrigerant
expansion valve
discharge line
sweating
223
Illustr
RA-0018
80 psi
GS-0062
retract with rate of
movement
uncontrolled
prevent liquid
slugging in the
suction line
GS-0041
Book Num
11
2975
Ans
D
11
2976
D
11
2977
D
11
2978
B
11
2979
D
Question
The suction pressure of the refrigeration system shown
in the illustration is abnormally low, with a normal
discharge pressure. Which of the following statements
describes the probable cause and corrective action?
Answer A
Excessive refrigerant
is circulating within
the system; bleed
excess to the
atmosphere.
Answer B
Filter drier is too
large for the system;
replace with proper
size.
Answer C
Compressor check
valves are leaking;
replace only the
damaged valves.
Answer D
Moisture is frozen in
the expansion valve;
thaw valve and
replace drier.
As shown in the illustration, a section of standard
weight, seamless steel pipe, has an external diameter
of 3.8 inches. When the pipe, is bent into a 90 degree
turn, the length of the outside edge of the curve "A-B"
will exceed the length of the inside e
1.097 inches
1.571 inches
4.712 inches
5.969 inches
With regards to the illustrated rudder, the pivot point
and connection to the vessel is provided by
__________.
The compressor in figure 4, if permitted to operate as
illustrated will __________.
rudder stock
variable stroke pump main pump (item
(item #3)
#13)
11
2980
D
The direction and rate of rotation for the cab in the
hydraulic crane circuit shown, is controlled by the
__________.
The wire rope drum used in the illustrated hydraulic
crane circuit is prevented from accidentally paying out
by __________.
11
2981
B
If solenoid "B" of the valve illustrated is energized, the
cylinder will __________.
11
2982
B
11
2983
A
11
2984
B
RA-0018
GS-0108
stern post
clevis post
gudgeon and pintle
GS-0131
lose its volumetric
efficiency
slightly shifting the
hoist valve into
position "I" to hold
the load in a steady
position
extend with rate of
movement controlled
If a block and tackle arrangement were rigged as shown 88 lbs.
in figure "G" in the illustration, the amount of force "P"
required to hold the 362 pound load stationary would be
__________.
If you have a duplex single acting reciprocating pump
42 gpm
making 130 strokes/minute, with a 5" diameter cylinder,
a 4" stroke and operating with 96% volumetric
efficiency, what is the capacity of this pump?
A liquid line solenoid valve controls refrigerant flow to
the evaporator by __________.
Illustr
throttling the
refrigerant
224
damage the bearings trip the breaker when
of the motor
being restarted for
the first time after
replacing the belts
the installation of a
braking valve in line
"K" to the hydraulic
motor
control valve (item
#1)
result in a constant
enlargement of the
clearance expansion GS-0159
volume
manual control valve
(item #10)
GS-0161
the use of a spring
components labeled
set, electric solenoid 4 and 5
released brake
retract with rate of
extend with rate of
movement controlled movement
uncontrolled
91 lbs.
121 lbs.
retract with rate of
movement
uncontrolled
145 lbs.
GS-0161
GS-0041
GS-0110
34 gpm
21 gpm
85 gpm
fully opening or
closing
sensing the
superheat in the tail
coil
sensing the
temperature in the
liquid line
Book Num
11
2985
Ans
A
11
2986
A
11
2988
C
11
2989
A
11
2990
D
11
2991
C
Question
Answer A
Which of the following conditions would indicate that the Normal discharge
drier of the refrigeration system shown in the illustration pressure with an
became restricted and required replacement?
abnormally low
suction pressure.
Answer B
Frosting at the outlet
of the drier and an
excessively high
suction pressure.
Answer C
Answer D
Illustr
Frosting at the outlet Suction pressure low
of the drier and
with a normal
frosting at the three discharge pressure. RA-0018
way valve.
If you have a duplex double acting reciprocating pump 204 gpm
making 110 strokes/minute, with a 5" diameter cylinder,
a 12" stroke and operating with 91% volumetric
efficiency, what is the capacity of this pump?
102 gpm
245 gpm
51 gpm
The operation of a P-tank depends upon __________.
using nozzles to
recirculate the dry
bulk material
28 gpm
aerating the barite
All of the above
11 gpm
43 gpm
If you have a simplex single acting reciprocating pump 126 gpm
making 190 strokes/minute, with a 3" diameter cylinder,
a 12" stroke and operating with 90% volumetric
efficiency, what is the capacity of this pump?
63 gpm
251 gpm
31 gpm
saturation pressure
volume
weight
a reduction in
distillate purity
the pump becoming
vapor bound
If you have a duplex single acting reciprocating pump
making 180 strokes/minute, with a 3" diameter cylinder,
a 4" stroke and operating with 97% volumetric
efficiency, what is the capacity of this pump?
moving the dry barite
with a liquid mud
pump
21 gpm
11
2992
C
The amount of HCFC-123 in a storage cylinder is
measured by __________.
The discharge valve of pump "O" in the system
illustrated is only opened by 25%, this will result in
__________.
11
2994
A
The lubrication oil in the sump of a secured refrigeration reduce absorption of prevent refrigerant
compressor is heated to __________.
refrigerant by the oil vaporization
An excessive amount of oil is circulating throughout the
refrigeration system shown in the illustration. Which of
the following statements would indicate this improper
operating condition?
11
2995
The oil p.p.m.
sensor, device '30'
would initiate an
electronic signal.
B
225
The suction pressure
would be low, with
the discharge
pressure normal and
an associated lack of
space cooling.
saturation
temperature
valve "S" being
nothing unusual for
actuated and
the type of operation
dumping to the bilges indicated
GS-0053
after a few hours of
operation
remove entrained
remove wax and gum
water
All pressures would
be normal, but the
box temperature
would be above set
point.
The three way valve
and the thermostatic
expansion valve
would each have a
tendency to operate
more efficiently due
to the reduction of
internal frictional
forces.
RA-0018
Book Num
11
11
2996
3000
Ans
B
B
11
3001
D
11
3004
B
11
11
3005
3006
C
D
11
3007
C
11
3010
D
Question
Answer A
If you have a duplex single acting reciprocating pump
119 gpm
making 150 strokes/minute, with a 5" diameter cylinder,
a 7" stroke and operating with 95% volumetric
efficiency, what is the capacity of this pump?
Answer B
85 gpm
Answer C
42 gpm
Answer D
170 gpm
If you have a duplex single acting reciprocating pump
45 gpm
making 140 strokes/minute, with a 4" diameter cylinder,
a 5" stroke and operating with 94% volumetric
efficiency, what is the capacity of this pump?
36 gpm
18 gpm
72 gpm
When the insulation breaks down within a metal
encased, portable, electric tool, __________.
care should be taken
to insert the plug
correctly when
energizing the tool
you should stand on
a grounded deck
plate before
energizing the tool
line voltage may be
placed on the tool
casing making it
dangerous to operate
solenoid valves
back-pressure valves regulation of the
cooling water
The three way valve
has become lodged
in the mid position
requiring prompt
disassembly and
cleaning.
The power element
of the expansion
valve has lost its
charge due to a
break in the capillary
tube; therefore, it is
necessary to change
the power element.
The individual box temperatures of a multi-box
refrigeration system are controlled by __________.
A refrigeration container is fitted with a cooling system
similar to the one shown in the illustration. The suction
pressure drops rapidly just after the compressor is
started. Although the evaporator coil is warm, frost is
forming at the expansion valve outlet. Which of the
following statements describes the most probable
cause and the corrective action to be taken?
added safety
features are built into
the receptacle to
allow continued use
of the tool
expansion valves
There is a shortage
of refrigerant
requiring an
immediate charge.
These start-up
characteristics are
normal and no
additional actions are
necessary.
Acetylene should never be used at pressures in excess acetylene cylinders fusible plug will blow relief valve will lift
of 15 psig because the __________.
have a maximum
out
allowable pressure of
15 psig
slightest shock could
cause an explosion
If you have a duplex single acting reciprocating pump
84 gpm
making 170 strokes/minute, with a 6" diameter cylinder,
a 5" stroke and operating with 97% volumetric
efficiency, what is the capacity of this pump?
202 gpm
In the circle illustrated, the circumference is 157.6
inches. What is the area of the shaded portion?
50 gpm
101 gpm
394.0 square inches 168.5 square inches 337.0 square inches 179.6 square inches
226
Illustr
RA-0018
GS-0134
Book Num
11
11
3011
3012
Ans
C
C
11
3013
A
11
3014
C
11
11
11
11
11
3015
3016
3017
3019
3022
Question
Oil is supplied to the illustrated steering gear
__________.
D
A
B
D
A
Answer A
Answer B
through flexible
via the connections
hydraulic hoses via indicated as "J"
the connection ports
located in the top
surface of "O"
If you have a duplex single acting reciprocating pump
19 gpm
making 120 strokes/minute, with a 3" diameter cylinder,
a 4" stroke and operating with 95% volumetric
efficiency, what is the capacity of this pump?
A 'P-tank', as used aboard oilfield supply boats is
__________.
Water regulating valves are installed to vary the water
flow through the water cooled refrigeration condensers
in response to __________.
The three way valve of the refrigeration system shown
in the illustration leaks internally while the system is in
the cooling mode. Which of the following statements
indicates this condition?
7 gpm
Answer C
Answer D
through high
via hydraulic hoses
pressure piping at
connected to the
"A" and then internal orifices in "B"
ports provided in the
housing assembly
"U"
14 gpm
a pressurized vessel a tank which is used a pneumatically
designed to carry dry to store compressed operated tank used
pulverized materials air at 100 psi
to transport liquid drill
mud
compressor
compressor speed
compressor
discharge pressure
discharge
temperature
Higher than normal The inability of the
Low discharge
condenser air outlet unit to properly pump
pressure with an
down the high side.
associated low
temperature with a
suction pressure.
higher than normal
suction temperature.
If a block and tackle arrangement were rigged as shown 95 lbs.
in figure "G" in the illustration, the amount of force "P"
required to hold the 378 pound load stationary would be
__________.
If you have a duplex single acting reciprocating pump
140 gpm
making 150 strokes/minute, with a 6 inch diameter
cylinder, a 4 inch stroke and operating with 95%
volumetric efficiency, what is the capacity of this pump?
119 lbs.
126 lbs.
GS-0116
28 gpm
All of the above
condenser discharge
temperature
Low discharge
pressure and a
normal or high
suction pressure.
RA-0018
151 lbs.
GS-0110
70 gpm
35 gpm
20 gpm
If you have a duplex single acting reciprocating pump
47 gpm
making 150 strokes/minute, with a 6" diameter cylinder,
a 4" stroke and operating with 95% volumetric
efficiency, what is the capacity of this pump?
35 gpm
140 gpm
70 gpm
If you have a simplex single acting reciprocating pump 73 gpm
making 190 strokes/minute, with a 5 inch diameter
cylinder, a 12 inch stroke and operating with 75%
volumetric efficiency, what is the capacity of this pump?
291 gpm
145 gpm
349 gpm
227
Illustr
Book Num
11
3023
Ans
C
11
3025
D
11
3026
B
11
3027
D
11
3028
D
11
11
11
11
3029
3030
3031
3032
A
B
Question
In the circle illustrated, the circumference is 125.6
inches. What is the area of the shaded portion?
If the suction line of the refrigeration system shown in
the illustration sweats excessively during operation, the
expansion valve may be stuck open. Which of the
following statements would indicate the most probable
cause of this situation?
The power element
and sensing bulb
have lost their
charge.
The equalizing line
The box door is open The sensing bulb has
has become clogged creating excessive
become detached
with wax and ice.
thermal loading.
from the suction line.
Illustr
GS-0134
RA-0018
Which of the following listed pressures is the maximum 10 psi
acetylene gas pressure that can be safely used in gas
welding?
If you have a duplex single acting reciprocating pump
100 gpm
making 110 strokes/minute, with a 6" diameter cylinder,
a 7" stroke and operating with 91% volumetric
efficiency, what is the capacity of this pump?
15 psi
25 psi
35 psi
43 gpm
172 gpm
86 gpm
In the illustration, line "K" is a __________.
dimension line
leader line
cutting plane line
phantom line
The illustrated shaft has an overall length of 42 inches.
If the diameter of "E" = 4.750" and "F" = 6", with an
indicated radius of "R" = .125" and the taper per foot,
"L" = 1.5"; then the tapered length "X" is __________.
6.000 inches
7.812 inches
8.000 inches
10.00 inches
In the illustrated 8,000 GPD evaporator the salt water
feed pump and pump "N" are identically constructed. If
the vapor pressure in chamber "II" is 2.1 psia, with a
feed temperature of 170° F; operating pump "N" with
the discharge valve 100% open will __________.
contribute to
increase the purity of produce a higher
produce the
than normal brine
designed quantity of chamber "II" and "III" the distillate
concentrate
distillate
operating at the
same absolute
pressure
The function of item "7" shown in the illustration is to
__________.
direct the flow of the support the tank
oily-water mixture
access panel
against the coalescer
bed
allow the oil
prevent separated oil
accumulated to exit from mixing with the
the device, while
incoming bilge water
GS-0153
remaining separated
from the liquid
The illustrated shaft has an overall length of 15 inches.
If the diameter of "E" = 2.5" and "F" = 3.5", with an
indicated radius of "R" = .125" and the length of the
tapered section "X" is to be 5"; then the amount of
tailstock offset should be __________.
0.750"
1.250"
D
A
Answer A
Answer B
Answer C
Answer D
234.0 square inches 107.0 square inches 114.1 square inches 214.0 square inches
GS-0006
GS-0133
0.833"
GS-0053
1.500"
GS-0133
228
Book Num
11
11
3033
3034
Ans
D
B
11
3035
A
11
3036
A
11
3037
A
11
3038
B
11
3039
A
11
3041
C
11
3042
B
11
3044
C
11
3045
B
Question
Answer A
If you have a duplex single acting reciprocating pump
211 gpm
making 130 strokes/minute, with a 6" diameter cylinder,
a 4" stroke and operating with 95% volumetric
efficiency, what is the capacity of this pump?
Answer B
130 gpm
Answer C
118 gpm
Answer D
60 gpm
Thermostatic expansion valves are opened
__________.
by spring pressure
and closed by
refrigerant pressure
by refrigerant
and closed by spring and closed by
pressure and closed pressure
refrigerant pressure
by spring pressure
The refrigeration system shown in the illustration has a
frosted and frozen suction line and the surrounding air
has a high relative humidity. The box temperature is 10°
F above set point, with the unit operating in the cool
mode. Which of the listed actions should be taken?
Initiate the defrost
cycle and ascertain
the proper operation
of the three way
valve.
Add Freon to the unit Change the rotation
to establish an
of the condenser
operating discharge fans.
pressure of 150 psig.
Using an 'amp
clamp', determine if
the electric drip pan
heaters are
ungrounded and
operating correctly.
When gas welding or burning, the acetylene working
explosion
pressure must be kept below 15 psi to prevent a
possible __________.
If you have a duplex single acting reciprocating pump
263 gpm
making 170 strokes/minute, with a 8 inch diameter
cylinder, a 8 inch stroke and operating with 89%
volumetric efficiency, what is the capacity of this pump?
torch backfire
torch flameout
acetone fire
132 gpm
66 gpm
33 gpm
In the circle illustrated, the circumference is 75.36
inches. What is the area of the shaded portion?
The valve in the line, labeled "C" in the illustrated
system, should be opened __________.
65.0 square inches
41.1 square inches
38.5 square inches
77.0 square inches
when filling the tank
after the tank is full to when the tank is
empty to prevent
check the level of
condensation from
bulk material
accumulating
1.749 inches
3.752 inches
expansion flange
threaded flange
The maximum diameter of the device illustrated is
__________.
The section of flange illustrated and indicated as "D" is
a __________.
Which of the following statements describes the
characteristics of precision manufactured roller
bearings?
1.275 inches
when discharging the
pulverized material
after it has been
fluidized and
aerated.
1.522 inches
van stone flange
socket weld flange
They are not capable They have a
They are well
of maintaining
relatively high power adapted to variable
alignment over long loss due to friction.
speed operation.
periods of time.
Their lubrication is
complicated and
requires constant
attention.
Concerning the operation of refrigeration systems,
frosting or sweating of a liquid line is usually indicative
of __________.
high surrounding
relative humidity
proper cooling taking
place
229
a refrigerant line
restriction
water in the system
Illustr
RA-0018
GS-0134
GS-0163
GS-0008
GS-0018
Book Num
11
11
11
3046
3048
3049
Ans
C
A
3050
A
11
3051
A
11
3052
C
11
3054
A
11
3055
3058
Answer C
99 lbs.
Which of the listed conditions will occur if valve "14" of
the unit shown in the illustration is secured while the
unit is operating in the processing mode?
The water in the
bilges will rise until
probe "6" causes the
automatically
operated valve "5" to
open.
The water in the
bilges will continue to
rise if no other pump
is operated because GS-0153
the pump suction
valve has been
secured.
D
11
11
Question
Answer A
Answer B
If a block and tackle arrangement were rigged as shown 70 lbs.
82 lbs.
in figure "G" in the illustration, the amount of force "P"
required to hold the 394 pound load stationary would be
__________.
The hydraulic pump which would be mounted on the
"D" is not kept clean "A" is allowed to
unit shown in the illustration, may begin to cavitate if
remain open
__________.
"B" is over tightened "H" were to be
removed and the
system operated for
thirty minutes without GS-0118
it being replaced
56 gpm
34 gpm
135 gpm
The backlash of the gear illustrated is represented by
G
__________.
If you have a duplex double acting reciprocating pump 33 gpm
making 110 strokes/minute, with a 4" diameter cylinder,
a 6" stroke and operating with 93% volumetric
efficiency, what is the capacity of this pump?
M
N
O
50 gpm
67 gpm
17 gpm
flushed with clean
refrigerant oil
purged with
refrigerant gas
grounded to the
compressor
a normal pressure
differential between
the suction and
discharge valve
assemblies
retightened
compressor
foundation bolts
washed with an
ammonia and alcohol
solution
an excessive amount
of oil in the
crankcase
I only
II only
Both I and II
Neither I nor II
Immediately before the actual charging process is
started, refrigerant oil charging lines should be loosely
connected and __________.
A noisy compressor in the system shown in the
illustration may be caused by __________.
In the illustration, the item labeled as '30' is
__________.
I. used to prime the pump at start-up
II. to supply sealing water to the stuffing box
Illustr
GS-0110
If you have a duplex single acting reciprocating pump
68 gpm
making 120 strokes/minute, with a 6" diameter cylinder,
a 5" stroke and operating with 92% volumetric
efficiency, what is the capacity of this pump?
C
A
The water in the
The water in the
bilges will continue to bilges will rise until
be discharged.
probe "6" activates
the separator.
Answer D
131 lbs.
GS-0111
all of the above are
correct
RA-0018
GS-0012
230
Book Num
Ans
11
3059
C
11
3060
C
11
11
3062
3064
C
B
11
3065
D
11
3066
B
11
11
11
3067
3068
3069
C
D
D
Question
Answer A
If you have a duplex double acting reciprocating pump 308 gpm
making 150 strokes/minute, with a 7" diameter cylinder,
a 13" stroke and operating with 95% volumetric
efficiency, what is the capacity of this pump?
Answer B
491 gpm
Answer C
617 gpm
Answer D
1146 gpm
In the hydraulic anchor windlass system illustrated,
pressure relief of the main pressure piping is provided
by __________.
A 'P-tank' as used aboard oilfield supply boats is
__________.
E
L
M
D
Illustr
GS-0160
a pressure vessel
a pneumatically
designed to transport operated tank used
liquid drill mud
transfer liquid drill
mud
a pneumatically
operated tank used
to transfer dry,
pulverized drilling
materials
Valves "A" and "B"
Valves "A" and "B"
With a service gage manifold connected to a refrigerant Valves "A" and "B"
closed and, back
open, valves "C" and closed, valves "C"
compressor as illustrated, which arrangement of the
and "D" open just off seated valves "C"
"D" closed on their
gage manifold valves and compressor service valves
and "D" back seated.
the back seats.
would allow for simultaneous reading of the compressor front seats.
suction and discharge pressures?
All of the above
Valves "A" and "B"
open, valves "C" and
"D" open in midRA-0003
position.
A noisy compressor, in a system similar to the
installation shown in the illustration exhibits a high
discharge pressure. This may be caused by
__________.
the formation of ice
at the expansion
valve due to the
presence of moisture
in the system
the thermostatic
the formation of wax all of the above are
expansion valve
at the thermostatic
correct
being restrained in a expansion valve
closed position
In the illustration, line "F" is a/an __________.
assembly line
break line
cutting plane line
phantom line
If you have a duplex double acting reciprocating pump 134 gpm
making 130 strokes/minute, with a 5" diameter cylinder,
a 13" stroke and operating with 93% volumetric
efficiency, what is the capacity of this pump?
347 gpm
267 gpm
67 gpm
If you have a simplex single acting reciprocating pump 196 gpm
making 170 strokes/minute, with a 5" diameter cylinder,
a 7" stroke and operating with 97% volumetric
efficiency, what is the capacity of this pump?
98 gpm
137 gpm
49 gpm
In the diagram, items '2A and 2B' represent the
overboard discharge valves of the ballast system
illustrated. According to 46 CFR Part 56, which of the
following statements is correct if the vessels length
between perpendiculars is 500 feet, and the thro
Valve 2B must be
positive closing, in
addition to the
indicated automatic
non-return valve
feature.
Both valves must be
positive closing, in
addition to the ability
to provide the
automatic non-return
feature.
Only one valve is
required, but must be
positive closing and
include the automatic GS-0125
non-return feature.
Valve 2A must be
positive closing, in
addition to the
indicated automatic
non-return valve
feature.
231
RA-0018
GS-0006
Book Num
11
11
3070
3072
Ans
A
A
11
3073
B
11
3074
C
11
3075
C
11
3076
D
11
3078
D
11
3079
C
11
3080
D
Question
Answer A
If a hole were to form in the division plate between
I only
stages of a flash type evaporator __________.
I. vaporization of the feed water would continue
II. 2nd stage vacuum would increase
The illustrated shaft has an overall length of 42 inches. 4.750 inches
If the diameter of "F" = 6" and "X" = 6", with an indicated
radius of "R" = .125" and a taper per foot of "L" = 1.5";
then the small diameter "E" is __________.
3081
Answer C
Both I and II
Answer D
Neither I nor II
6.000 inches
6.333 inches
7.812 inches
Illustr
GS-0133
If you have a duplex single acting reciprocating pump
33 gpm
making 110 strokes/minute, with a 6" diameter cylinder,
a 4" stroke and operating with 91% volumetric
efficiency, what is the capacity of this pump?
49 gpm
49 gpm
98 gpm
A V-belt that is too tight will cause excessive wear of
both the belt and the __________.
A refrigeration system similar to the one shown in the
illustration will only operate correctly in the cooling
mode. Which of the following statements indicates the
most probable cause?
compressor slave
pulley
A very large pressure
drop is apparent
between the
condenser and the
evaporator.
main bearing of the
compressor
The pilot valve
solenoid has failed to
become energized
due to an open in the
electrical circuit.
prime mover drive
pulley
An excessive amount
of compressor surge
due to an overcharge
RA-0018
of refrigerant.
111 lbs.
115 lbs.
120 lbs.
shaft of the prime
mover
The thermostatic
expansion valve is
improperly adjusted.
If a block and tackle arrangement were rigged as shown 82 lbs.
in figure "G" in the illustration, the amount of force "P"
required to hold the 478 pound load stationary would be
__________.
If you have a duplex double acting reciprocating pump 207 gpm
making 130 strokes/minute, with a 6" diameter cylinder,
a 14" stroke and operating with 93% volumetric
efficiency, what is the capacity of this pump?
In the circle illustrated, the circumference is 35.84 feet. 2.7 square feet
What is the area of the shaded portion?
If you have a duplex double acting reciprocating pump 244 gpm
making 150 strokes/minute, with a 6" diameter cylinder,
a 14" stroke and operating with 95% volumetric
efficiency, what is the capacity of this pump?
A valve connected to the vent line labeled "C" in the
illustration should be opened __________.
11
Answer B
II only
when flushing the
pressure tank with
firemain water
D
232
GS-0110
483 gpm
104 gpm
414 gpm
0.5 square feet
9.3 square feet
17.4 square feet
570 gpm
122 gpm
488 gpm
by a pressure relief
valve when the
pressure exceeds
the preset level,
usually 42 psig (2.98
kg/cm2)
at all times, except
when the tank is
pressurized for
discharging or
aerating the bulk
material
when filling the tank
or to insure that the
tank is not
pressurized prior to
entering for cleaning
and inspection
GS-0134
GS-0163
Book Num
11
11
3082
3083
Ans
A
C
11
3084
B
11
3085
D
11
3086
D
11
3087
B
11
3088
C
11
11
3089
3090
A
C
11
3091
A
11
3092
B
11
3095
C
Question
Answer A
In the hydraulic anchor windlass system illustrated,
A
pressurized fluid flow to provide rotation of the wildcat is
produced by __________.
If you have a duplex single acting reciprocating pump
152 gpm
making 110 strokes/minute, with a 7" diameter cylinder,
a 8" stroke and operating with 91% volumetric
efficiency, what is the capacity of this pump?
Answer B
F
Answer C
J
Answer D
GS-0160
67 gpm
133 gpm
267 gpm
To test for a suspected large refrigerant leak from a
refrigeration system in an enclosed area, you should
__________.
apply liquid ammonia apply a soap solution a halide leak detector apply a hydrostatic
to the suspected leak to the area of the
to all piping joints
test with water
suspected leak
A low oil level maintained in an operating compressor,
similar to the unit shown in the illustration, may be
caused by __________.
When arc welding, you can reduce the chance of a
dangerous electric shock by __________.
an internal leak
within the heat
exchanger
using insulated
electrode holders
an improperly
operating filter/ drier
a properly operating
filter/ drier
wearing dry welding
gloves
avoiding wet or damp all of the above
areas while using arc
welding equipment
tooth fillet
bottom land
top land
0.324 inch
0.349 inch
0.351 inch
134 gpm
347 gpm
67 gpm
If you have a duplex double acting reciprocating pump 81 gpm
making 170 strokes/minute, with a 6" diameter cylinder,
a 4" stroke and operating with 97% volumetric
efficiency, what is the capacity of this pump?
54 gpm
161 gpm
40 gpm
The illustrated shaft has an overall length of 42 inches.
If the diameter of "E" = 4.75" and "F" = 6", with an
indicated radius of "R" = .125" and the length of "X" =
8"; then the TPF (taper per foot) is __________.
1.250 TPF
1.500 TPF
1.875 TPF
The letter "H" of the illustrated gear, represents the
tooth profile
__________.
The reading on the micrometer scale shown in figure
0.301 inch
"C" in the illustration is __________.
If you have a duplex double acting reciprocating pump 267 gpm
making 130 strokes/minute, with a 5" diameter cylinder,
a 13" stroke and operating with 93% volumetric
efficiency, what is the capacity of this pump?
1.125 TPF
Illustr
K
a worn piston or
cylinder sleeve
RA-0018
GS-0111
GS-0013
GS-0133
Operating pressure range for an oilfield supply boat 'P- 5-15 psi
tank' generally varies from __________.
If you have a duplex single acting reciprocating pump
49 gpm
making 110 strokes/minute, with a 6" diameter cylinder,
a 9" stroke and operating with 91% volumetric
efficiency, what is the capacity of this pump?
233
15-40 psi
50-100 psi
100-150 psi
75 gpm
110 gpm
150 gpm
Book Num
11
3096
Ans
B
11
3098
A
11
3099
B
11
11
3102
3103
A
B
11
3104
D
11
3105
A
11
3106
D
11
3107
D
11
3108
A
11
3109
A
Question
Before welding is permitted on a fuel tank, it must be
certified or declared __________.
In the hydraulic anchor windlass system illustrated,
pressurized fluid flow is provided to the main system for
automatic replenishment and to __________.
Answer A
safe for personnel
Answer B
safe for hot work
provide fluid flow for engage the spring
the horsepower
brake
limiter unit operation
Answer C
not safe for
personnel
shift valve "L" to line
up the fluid motor
relief valve
Answer D
not safe for hot work
move stored oil
across the indicated
filter to maintain the
oil in a water free
condition
In the circle illustrated, the circumference is 43.96 feet. 10.5 square feet
What is the area of the shaded portion?
If a block and tackle arrangement were rigged as shown 149 lbs.
in figure "G" in the illustration, the amount of force "P"
required to hold the 594 pound load stationary would be
__________.
99 gpm
If you have a duplex single acting reciprocating pump
making 270 strokes/minute, with a 4" diameter cylinder,
a 6" stroke and operating with 75% volumetric
efficiency, what is the capacity of this pump?
14.0 square feet
2.4 square feet
26.2 square feet
160 lbs.
198 lbs.
238 lbs.
66 gpm
33 gpm
132 gpm
A room humidistat initiates the lowering of the humidity raising the cooling
of the conditioned supply air to a space, while the actual coil temperature and
lowering the reheater
process is accomplished by __________.
temperature
raising both the
cooling coil
temperature and the
reheater temperature
lowering both the
cooling coil
temperature and the
reheater temperature
lowering the cooling
coil temperature and
raising the reheater
temperature
smoothed surfaced
only
threaded with
opposing machined
flats
all of the above
The physical feature indicated for each of the smallest
diameter ends of the device illustrated is that they are
__________.
Safe welding practice requires __________.
smooth surfaced with
opposing machined
flats
checking the area for that a fire watch be
items that may catch posted
fire
one
three
234
GS-0160
GS-0134
GS-0110
threaded
As shown in the illustration, the total number of
materials indicated is __________.
In the circle illustrated, the circumference is 62.8 feet.
28.5 square feet
What is the area of the shaded portion?
If you have a duplex double acting reciprocating pump 319 gpm
making 110 strokes/minute, with a 6" diameter cylinder,
a 13" stroke and operating with 91% volumetric
efficiency, what is the capacity of this pump?
Illustr
checking for
explosive gases
four
five
38.5 square feet
15.1 square feet
53.5 square feet
159 gpm
345 gpm
80 gpm
GS-0008
GS-0018
GS-0134
Book Num
11
3111
Ans
D
11
3112
C
11
3113
B
11
11
11
11
11
11
3115
3116
3117
3118
3119
3120
C
B
D
A
A
C
Question
Answer A
What would be the probable cause if a pump were
I only
unable to maintain necessary discharge pressure to a
system?
I. failure of the coupling used on a close-coupled pump
II. fracture of one packing gland bolt
Answer B
II only
Answer C
Both I and II
Answer D
Neither I nor II
In a typical hydraulic system, a baffle is installed in the I only
reservoir to __________.
I. insure proper lubrication of the hydraulic pump
II. assist in the removal of solid contaminants entrained
in the returning oil
Supply air pressure to an oilfield supply boat 'P-tank'
15 psi
system should generally not be above __________.
II only
Both I and II
Neither I and II
50 psi
100 psi
150 psi
35 gpm
If you have a duplex single acting reciprocating pump
making 150 strokes/minute, with a 3" diameter cylinder,
a 5" stroke and operating with 92% volumetric
efficiency, what is the capacity of this pump?
11 gpm
21 gpm
42 gpm
If you have a duplex single acting reciprocating pump
104 gpm
making 180 strokes/minute, with a 4" diameter cylinder,
a 7" stroke and operating with 87% volumetric
efficiency, what is the capacity of this pump?
60 gpm
30 gpm
119 gpm
III
IV
V
In the unit illustrated, the feedwater temperature is
required to be increased to 165° F or greater and must
exist at this temperature when leaving __________.
I
Illustr
GS-0053
If you have a duplex single acting reciprocating pump
29 gpm
making 220 strokes/minute, with a 3" diameter cylinder,
a 5" stroke and operating with 87% volumetric
efficiency, what is the capacity of this pump?
49 gpm
59 gpm
113 gpm
Salinity cells are strategically installed in distilling units
to indicate the __________.
I. location of a saltwater leak
II. size of the leak
In the diagram, items '2A and 2B' represent the
overboard discharge valves of the ballast system
illustrated. According to 46 CFR Part 56, which of the
following statements is correct if the length between
perpendiculars of a vessel is 500 feet, and the through
hull opening is eleven feet above the summer loadline?
I only
II only
Both I and II
Neither I nor II
Valve 2A must be
positive closing, in
addition to the
indicated automatic
non-return valve
feature.
Valve 2B must be
positive closing, in
addition to the
indicated automatic
non-return valve
feature.
Only one automatic
non-return valve
feature is required.
Both valves are
correct as required
and indicated in the
illustration.
235
GS-0125
Book Num
11
3121
Ans
C
11
3122
B
11
3123
A
11
3124
C
11
3125
C
11
3126
A
11
11
3127
3128
C
A
11
3129
B
11
3130
B
Question
In the hydraulic anchor windlass system illustrated, the
main pressure relief valve opens as the load increases
its strain on the system. The probable cause is the
__________.
Answer A
replenishing pump
discharge check
valves are
continuously open
The illustrated shaft has an overall length of 42 inches.
If the diameter of "E" = 2.50" and "F" = 3.750", with an
indicated radius of "R" = .125" and the taper per foot,
"L" = 1.5"; then the tapered length "X" is __________.
5.000 inches
The gear clearance of the illustrated gear is
represented by __________.
The thermostatic expansion valve is designed to
maintain constant __________.
A valve attached to line "H" in the illustration, should be
opened __________.
B
D
G
refrigerant flow
box temperature
coil outlet superheat coil pressure
Which statement describes the function of the filler
material used in acetylene cylinders?
Answer B
relief valve control
shuttle has shifted to
the wrong position
during windlass
operation
6.000 inches
Answer C
Answer D
manual transfer
spring set point "I" is
valve is in the wrong set too high for
position for the main normal loads
pump being operated
8.000 inches
Illustr
GS-0160
10.00 inches
GS-0133
M
as a gravity
to backflush the
pressure vessel with discharge for the
fluidized material if
jet air
the discharge line
becomes clogged
to drain moisture and to precharge the
dirt from the bottom bottom of the
of the tank
pressure vessel with
dry nitrogen prior to
discharging bulk
material
It reduces the danger It chemically reacts
of explosion.
with acetone to
produce acetylene.
I only
II only
It neutralizes the gas It is fire resistant and
to render it harmless. reduces fire hazards.
What would be the probable cause if a pump were
unable to maintain necessary discharge pressure to a
system?
I. failure of the internal parts of the pump
II. failure of the pump relief valve spring
An air compressor is equipped with an intercooler to
I only
__________.
I. increase the efficiency of the compressor
II. reduce the low pressure cylinder designed operating
temperature
If you have a duplex double acting reciprocating pump 172 gpm
making 110 strokes/minute, with a 6" diameter cylinder,
a 14" stroke and operating with 91% volumetric
efficiency, what is the capacity of this pump?
The pitch radius of the gear illustrated is represented by D
__________.
236
Both I and II
Neither I nor II
II only
Both I and II
Neither I nor II
343 gpm
400 gpm
86 gpm
E
L
P
GS-0111
GS-0163
GS-0111
Book Num
Ans
11
3132
D
11
3133
C
11
11
11
11
11
3134
3135
3136
3137
3138
C
B
A
A
B
11
3140
C
11
3141
A
Question
Answer A
If you have a duplex single acting reciprocating pump
120 gpm
making 230 strokes/minute, with a 4" diameter cylinder,
a 7" stroke and operating with 78% volumetric
efficiency, what is the capacity of this pump?
Answer B
34 gpm
Answer C
137 gpm
Answer D
68 gpm
In the illustration, the portion of the work piece which is
indicated as being 7/8" in length, is an example of a
__________.
In multi-box refrigeration systems, the sensing bulb of
the thermostatic expansion valves used on refrigerated
boxes with elevated temperatures should be located
__________.
When the helm angle position is changed, the series of
corresponding events of the steering gear will include
__________.
I. rate of steering gear ram movement will be
proportional to amount of helm angle input
II. degree of tilting plate (box) angle will be proportional
to the amount of helm angle input
radius
taper
chamfer
uniform diameter
Illustr
GS-0016
in the diffuser fan
inlet air stream
in the diffuser fan
outlet air stream
before the back
pressure regulating
valve
after the back
pressure regulating
valve
I only
II only
Both I and II
Neither I nor II
II only
Both I and II
Neither I nor II
65 gpm
274 gpm
109 gpm
A set point adjustment to a bourdon tube pressure gage I only
is accomplished by __________.
I. adjusting the effective moment arm length between
the end of the bourdon tube and the quadrant gear
fulcrum
II. adjusting the pointer position relative to the pi
II only
Both I and II
Neither I nor II
If you have a duplex double acting reciprocating pump 217 gpm
making 110 strokes/minute, with a 7" diameter cylinder,
a 13" stroke and operating with 91% volumetric
efficiency, what is the capacity of this pump?
403 gpm
434 gpm
108 gpm
If your ship burns 8 tons of fuel per hour at 15 knots,
how many tons per hour will it burn at 18 knots?
11.5 tons
10.7 tons
9.5 tons
I only
A compressor operating with an accumulation of dust
and grease on the surfaces of an intercooler would
result in __________.
I. a high consumption of lube oil
II. higher than normal air pressure in the receiver
If you have a duplex single acting reciprocating pump
54 gpm
making 120 strokes/minute, with a 5" diameter cylinder,
a 6" stroke and operating with 89% volumetric
efficiency, what is the capacity of this pump?
13.8 tons
237
Book Num
11
3143
Ans
Question
A P-tank system __________.
Answer B
Answer C
is designed to pump must be kept free of
chunks of cement
foreign objects
Answer D
answers B and C
above
hold water vapor on
the cold side of the
insulation
reduce the possibility
of moisture laden
warm air entering the
insulation
reduce the possibility
of moisture laden
cold air from entering
the insulation
If a block and tackle arrangement were rigged as shown 132 lbs.
in figure "G" in the illustration, the amount of force "P"
required to hold the 642 pound load stationary would be
__________.
62 gpm
If you have a duplex single acting reciprocating pump
making 210 strokes/minute, with a 4" diameter cylinder,
a 7" stroke and operating with 77% volumetric
efficiency, what is the capacity of this pump?
161 lbs.
214 lbs.
257 lbs.
108 gpm
31 gpm
123 gpm
The following results were obtained when an
I only
uncalibrated bourdon tube pressure gage was
compared to a test pressure gage. Which adjustment(s)
is/are necessary?
True Pressure
Indicated Pressure
20
35
30
45
40
55
50
65
II only
Both I and II
Neither I nor II
If you have a duplex double acting reciprocating pump 37 gpm
making 130 strokes/minute, with a 3" diameter cylinder,
a 10" stroke and operating with 93% volumetric
efficiency, what is the capacity of this pump?
74 gpm
123 gpm
18 gpm
I only
II only
Both I and II
Neither I and II
B
In a typical hydraulic system, a baffle is installed in the
reservoir to __________.
I. provide a critical reduction in free surface effect of
the hydraulic pump
II. retard flow of oil through reservoir to assist in heat
removal
II only
Both I and II
Neither I nor II
C
The unloading of an air compressor may be provided by I only
__________.
I. holding the intake valve off of its seat
II. temporarily relieving the intercooler to the
atmosphere
C
Vapor seals used in the insulation on refrigerated
spaces serve to __________.
11
11
11
11
11
11
11
3144
3145
3146
3147
3148
3149
3150
C
B
A
A
B
Answer A
is designed to
transfer thick viscous
liquids
prevent Freon vapor
from saturating the
insulation
238
Illustr
GS-0110
Book Num
11
3151
Ans
D
11
3152
B
11
3154
D
11
11
11
11
11
3155
3156
3157
3159
3160
A
C
A
C
D
11
3162
C
11
3164
C
Question
Answer A
If you have a duplex single acting reciprocating pump
80 gpm
making 170 strokes/minute, with a 4" diameter cylinder,
a 6" stroke and operating with 96% volumetric
efficiency, what is the capacity of this pump?
Answer B
27 gpm
Answer C
107 gpm
Answer D
53 gpm
Your ship has steamed 1786 miles at 17 knots using
652 tons
515 tons of fuel oil. The distance remaining to your next
port is 1922 miles. If you increase speed to 20 knots,
how much fuel will be used to reach that port?
767 tons
858 tons
902 tons
Which of the design features listed for a refrigeration
Back seating
valve are used to reduce the possibility of loss of
refrigerant from the system?
If you have a simplex single acting reciprocating pump 27 gpm
making 180 strokes/minute, with a 4" diameter cylinder,
a 6" stroke and operating with 92% volumetric
efficiency, what is the capacity of this pump?
Valve caps
Packless diaphragms All of the above.
108 gpm
54 gpm
81 gpm
The effective temperature of air is dependent upon
__________.
I. relative humidity
II. air velocity
The illustrated shaft has an overall length of 42 inches.
If the diameter of "F" = 3.75" and "X" = 6", with an
indicated radius of "R" = .125" and a taper per foot, of
"L" = 1.5"; then the small diameter "E" is __________.
I only
II only
Both I and II
Neither I nor II
2.500 inches
4.333 inches
5.333 inches
10.00 inches
GS-0133
If you have a duplex double acting reciprocating pump 31 gpm
making 100 strokes/minute, with a 4" diameter cylinder,
a 7" stroke and operating with 82% volumetric
efficiency, what is the capacity of this pump?
55 gpm
62 gpm
16 gpm
Salinity cells are strategically installed in flash type
I only
distilling units to indicate the __________.
I. presence of leaks in the flash chambers
II. quantity of the distillate produced
If you have a duplex double acting reciprocating pump 145 gpm
making 190 strokes/minute, with a 5" diameter cylinder,
a 12" stroke and operating with 75% volumetric
efficiency, what is the capacity of this pump?
II only
Both I and II
Neither I nor II
349 gpm
291 gpm
73 gpm
The device which normally stops the refrigeration
compressor before the relief valve starts to open is the
__________.
Illustr
low pressure cutout
switch
239
back pressure cutout high pressure cutout relief valve bypass
switch
switch
Book Num
11
11
11
11
11
11
11
11
3165
3166
3167
3168
3169
3171
3172
3173
Ans
C
B
A
A
D
D
B
A
Question
If your ship burns 8 tons of fuel per hour at 15 knots,
how many tons per hour will it burn at 19 knots?
Answer A
10.1 tons
Answer B
12.8 tons
Answer C
16.3 tons
Answer D
19.1 tons
If you have a duplex double acting reciprocating pump 40 gpm
making 170 strokes/minute, with a 3" diameter cylinder,
a 10" stroke and operating with 77% volumetric
efficiency, what is the capacity of this pump?
80 gpm
134 gpm
20 gpm
When the helm angle position is changed in the wheel I only
house, a series of corresponding events of the steering
gear will occur and include the following:
I. The length of time the steering gear pump remains
on stroke is proportional to helm angle input
II. System pressure will be higher when the vessel is
operating "full astern"
II only
Both I and II
Neither I nor II
If you have a duplex single acting reciprocating pump
49 gpm
making 170 strokes/minute, with a 5" diameter cylinder,
a 4" stroke and operating with 85% volumetric
efficiency, what is the capacity of this pump?
39 gpm
25 gpm
98 gpm
If you have a duplex double acting reciprocating pump 206 gpm
making 180 strokes/minute, with a 6" diameter cylinder,
a 11" stroke and operating with 85% volumetric
efficiency, what is the capacity of this pump?
378 gpm
103 gpm
412 gpm
If you have a duplex double acting reciprocating pump 21 gpm
making 150 strokes/minute, with a 3" diameter cylinder,
a 5" stroke and operating with 92% volumetric
efficiency, what is the capacity of this pump?
35 gpm
11 gpm
42 gpm
If high relative humidity is maintained in a cargo hold,
there is a significant possibility that __________.
I. there will be an accumulation of static electricity
II. mold will grow and contaminate the cargo
I only
II only
Both I and II
Neither I nor II
The proper valve alignment for circulating mud in the
starboard forward tank in the illustration, is for valves
__________.
"E", "F", "J" and "K"
open, and all other
valves closed
"E", "R", "J", "K" and "E", "F", "B" and "D"
"S" open and a
open and all other
weighted hose
valves closed
connecting "R" and
"S"
240
"E", "F", "A", "B" and
"D" open. all other
valves closed
Illustr
GS-0162
Book Num
11
11
11
11
3174
3176
3177
3178
Ans
A
C
D
C
11
3179
A
11
3182
D
Question
Answer A
Answer B
Answer C
A liquid line economizer or heat exchanger in a
reduce the possibility raise the temperature cool the suction
of liquid refrigerant
vapor returning to the
refrigeration system, using a reciprocating compressor, of liquid refrigerant
functions to __________.
slugging the
compressor
compressor
Answer D
raise the refrigerant
saturation
temperature in the
evaporator
If you have a duplex double acting reciprocating pump 260 gpm
making 190 strokes/minute, with a 6" diameter cylinder,
a 14" stroke and operating with 80% volumetric
efficiency, what is the capacity of this pump?
608 gpm
521 gpm
130 gpm
Your ship has steamed 1856 miles at 18 knots using
690 tons
545 tons of fuel oil. The distance remaining to your next
port is 1978 miles. If you increase speed to 22 knots,
how much fuel will be used to reach that port?
710 tons
772 tons
868 tons
If you have a duplex double acting reciprocating pump 52 gpm
making 160 strokes/minute, with a 4" diameter cylinder,
a 7" stroke and operating with 85% volumetric
efficiency, what is the capacity of this pump?
91 gpm
104 gpm
26 gpm
Neither I nor II
A proportional band or range adjustment to a bourdon
tube pressure gage is accomplished by __________.
I. adjusting the effective moment arm length between
the end of the bourdon tube and the quadrant gear
fulcrum
II. adjusting the pointer position relative to the pinion
shaft upon which it is mounted
I only
II only
Both I and II
bilge water
conditioner
I only
sludge processor
oily-water conditioner oily-water separator
II only
Both I and II
Neither I nor II
High boiling point
High freezing point
Low specific heat
Low boiling point
52 gpm
91 gpm
26 gpm
11
3183
D
The unit shown in the illustration is known as a/an
__________.
In order to achieve greater dehumidification, you would
adjust the air conditioning system by __________.
I. reducing the chill water flow through the cooling coil
II. increasing the preheater temperature
11
3184
D
A refrigerant used in a mechanical refrigeration system
should have which of the following characteristics?
11
3185
A
If you have a duplex double acting reciprocating pump 104 gpm
making 150 strokes/minute, with a 4" diameter cylinder,
a 7" stroke and operating with 91% volumetric
efficiency, what is the capacity of this pump?
241
Illustr
GS-0153
Book Num
11
3186
Ans
Question
Answer A
A large evaporator coil has been determined to have a I only
pressure drop of 5 psig and can be compensated for by
__________.
Answer B
II only
Answer C
Both I and II
Answer D
Neither I nor II
21.7 tons
22.4 tons
27.0 tons
If you have a duplex double acting reciprocating pump 29 gpm
making 220 strokes/minute, with a 3" diameter cylinder,
a 5" stroke and operating with 87% volumetric
efficiency, what is the capacity of this pump?
49 gpm
15 gpm
59 gpm
I only
It is necessary to replace the defective thermal
expansion valve in a refrigeration system. If the valve is
improperly sized, this could result in __________.
I. starvation of the evaporator coil
II. constant hunting of the TXV and pressure surging
II only
Both I and II
Neither I nor II
714 tons
Your ship has steamed 1940 miles at 21 knots using
635 tons of fuel oil. The distance remaining to your next
port is 1833 miles. If you increase speed to 25 knots,
how much fuel will be used to reach that port?
850 tons
1012 tons
1214 tons
Which of the listed substances is used as an absorbing Ethylene glycol
agent in the shipboard dehydration of refrigeration
systems?
If you have a duplex single acting reciprocating pump
50 gpm
making 180 strokes/minute, with a 6" diameter cylinder,
a 4" stroke and operating with 85% volumetric
efficiency, what is the capacity of this pump?
Sodium bromide
Silica gel
Methyl glycol
75 gpm
37 gpm
150 gpm
If you have a duplex double acting reciprocating pump 40 gpm
making 180 strokes/minute, with a 5" diameter cylinder,
a 6" stroke and operating with 87% volumetric
efficiency, what is the capacity of this pump?
80 gpm
96 gpm
160 gpm
In the illustration, line "B" is a/an __________.
sectioning line
outline
phantom line
Illustr
B
I. adjusting the TXV spring compression and raising the
super heat value
II. installing an externally equalized TXV
11
11
11
3187
3188
3191
A
D
C
11
3192
B
11
3194
C
11
3195
B
11
3196
D
11
3197
C
If your ship burns 8 tons of fuel per hour at 15 knots,
how many tons per hour will it burn at 20 knots?
19.0 tons
hidden line
242
GS-0006
Book Num
11
11
11
3198
3199
3201
Ans
A
C
C
11
3202
D
11
3203
D
11
11
3204
3206
B
B
11
3207
B
11
3208
B
11
3210
B
Question
Answer A
If you have a duplex double acting reciprocating pump 109 gpm
making 190 strokes/minute, with a 4" diameter cylinder,
a 7" stroke and operating with 75% volumetric
efficiency, what is the capacity of this pump?
Answer B
54 gpm
Answer C
95 gpm
Answer D
27 gpm
If you have a duplex single acting reciprocating pump
81 gpm
making 180 strokes/minute, with a 4" diameter cylinder,
a 6" stroke and operating with 92% volumetric
efficiency, what is the capacity of this pump?
27 gpm
54 gpm
108 gpm
The illustrated shaft has an overall length of 42 inches.
If the diameter of "E" = 2.5" and "F" = 6", with an
indicated radius of "R" = .125" and the length of "X" =
8"; then the TPF (taper per foot) is __________.
1.250 inches
4.500 inches
6.875 inches
0.125 inches
GS-0133
141 gpm
If you have a duplex single acting reciprocating pump
making 190 strokes/minute, with a 3" diameter cylinder,
a 9" stroke and operating with 90% volumetric
efficiency, what is the capacity of this pump?
24 gpm
94 gpm
47 gpm
The base radius of the gear illustrated is represented by D
__________.
An evaporator pressure regulating valve (back pressure prevent compressor
overload
regulator) is installed in the evaporator coils of some
refrigeration systems to __________.
E
L
P
maintain a minimum control liquid
evaporator pressure refrigerant pressure
regulate refrigerant
outlet superheat
Subcooling of the refrigerant to reduce the percent of
I only
flash gas is accomplished __________.
I. as the refrigerant passes through the expansion
valve
II. in most water cooled condensers
If you have a duplex double acting reciprocating pump 47 gpm
making 180 strokes/minute, with a 4" diameter cylinder,
a 5" stroke and operating with 96% volumetric
efficiency, what is the capacity of this pump?
II only
Both I and II
Neither I nor II
94 gpm
59 gpm
24 gpm
22.0 tons
26.1 tons
29.4 tons
129 gpm
77 gpm
32 gpm
If your ship burns 8 tons of fuel per hour at 15 knots,
how many tons per hour will it burn at 21 knots?
Illustr
20.3 tons
If you have a duplex double acting reciprocating pump 64 gpm
making 140 strokes/minute, with a 5" diameter cylinder,
a 6" stroke and operating with 90% volumetric
efficiency, what is the capacity of this pump?
243
GS-0111
Book Num
11
11
3211
3212
Ans
C
3213
D
11
3214
A
11
3215
D
11
11
3216
3218
3219
Answer A
"E", "F", "J", "K" and
"S" open, and all
other valves closed
Answer B
"E", "R", "J", "K" and
"S" open with the
discharge hose
connected to "S"
Answer C
"A", "B" and "D" open
to pressure the tank
with the discharge
valve "R" open and
the discharge hose
connected to "R",
and all other valves
closed
Answer D
"B", "D", "E" and "S"
open with the
discharge hose
connected at "S",
and all other valves
closed
II only
Both I and II
Neither I nor II
94 gpm
125 gpm
170 gpm
just after the receiver before the condenser
In a large refrigeration system having more than one
evaporator, a king solenoid valve should be installed
and located __________.
I only
II only
A partially fouled liquid line strainer in the refrigeration
system will cause __________.
I. an increase in the percent of flash gas
II. desirable subcooling of the liquid
If you have a duplex single acting reciprocating pump
608 gpm
260 gpm
making 190 strokes/minute, with a 6" diameter cylinder,
a 14" stroke and operating with 80% volumetric
efficiency, what is the capacity of this pump?
between the
condenser and
receiver
Both I and II
before the back
pressure regulating
valve
Neither I nor II
130 gpm
521 gpm
If you have a duplex double acting reciprocating pump 21 gpm
making 180 strokes/minute, with a 3" diameter cylinder,
a 4" stroke and operating with 97% volumetric
efficiency, what is the capacity of this pump?
28 gpm
43 gpm
11 gpm
Your ship has steamed 1651 miles at 20 knots using
640 tons
580 tons of fuel oil. The distance remaining to your next
port is 1790 miles. If you increase speed to 25 knots,
how much fuel will be used to reach that port?
722 tons
983 tons
1060 tons
D
11
11
Question
The proper valve alignment for discharging liquid mud
from the starboard forward tank, in the illustrated
system, is for valves __________.
B
C
C
Following the withdrawal of the tail shaft, which nondestructive test could be used to locate cracks?
I. liquid penetrant dye
II. magnetic flux
I only
If you have a duplex double acting reciprocating pump 47 gpm
making 110 strokes/minute, with a 5" diameter cylinder,
a 10" stroke and operating with 91% volumetric
efficiency, what is the capacity of this pump?
244
Illustr
GS-0162
Book Num
11
11
3220
3222
Ans
A
C
11
3223
C
11
3224
B
11
3225
A
11
3226
C
11
3228
C
11
3229
D
11
3230
D
11
3231
C
Question
Answer A
If you have a duplex single acting reciprocating pump
108 gpm
making 180 strokes/minute, with a 4" diameter cylinder,
a 13" stroke and operating with 85% volumetric
efficiency, what is the capacity of this pump?
Answer B
352 gpm
Answer C
54 gpm
Answer D
216 gpm
If you have a duplex double acting reciprocating pump 18 gpm
making 130 strokes/minute, with a 3" diameter cylinder,
a 5" stroke and operating with 91% volumetric
efficiency, what is the capacity of this pump?
30 gpm
36 gpm
9 gpm
The presence of flash gas in the high pressure lines of I only
a refrigeration system is undesirable because
__________.
I. erosion of the TXV valve seat can be increased
II. refrigeration system capacity will be reduced
The thermostat controlling a refrigerated cargo box two- evaporator coil inlet
way solenoid valve senses __________.
temperature
II only
Both I and II
Neither I nor II
the refrigerated box
temperature
evaporator coil outlet degree of refrigerant
temperature
superheat
If you have a duplex double acting reciprocating pump 232 gpm
making 250 strokes/minute, with a 5" diameter cylinder,
a 6" stroke and operating with 91% volumetric
efficiency, what is the capacity of this pump?
114 gpm
86 gpm
57 gpm
If you have a simplex single acting reciprocating pump 327 gpm
making 170 strokes/minute, with a 5" diameter cylinder,
a 13" stroke and operating with 87% volumetric
efficiency, what is the capacity of this pump?
163 gpm
82 gpm
425 gpm
In the illustration shown, the last numeral in the notation thread is right hand
1/4-20 NC-2 indicates the __________.
If you have a duplex double acting reciprocating pump 104 gpm
making 130 strokes/minute, with a 6" diameter cylinder,
a 7" stroke and operating with 93% volumetric
efficiency, what is the capacity of this pump?
thread is left hand
class of thread fit
class of thread finish
121 gpm
52 gpm
207 gpm
If your ship burns 8 tons of fuel per hour at 15 knots,
how many tons per hour will it burn at 22 knots?
11.7 tons
14.2 tons
17.2 tons
25.2 tons
In order to achieve greater dehumidification with an air
conditioning system, you should __________.
I. reduce the cooling coil temperature
II. increase the reheater temperature
I only
II only
Both I and II
Neither I nor II
245
Illustr
GS-0036
Book Num
11
3232
Ans
C
11
3233
B
11
3234
D
11
11
11
3235
3236
3237
C
D
B
11
3238
D
11
3239
C
11
3240
A
11
3241
A
Question
A partially fouled liquid line strainer in the refrigeration
system will cause __________.
I. a loss of refrigeration effect
II. the strainer outlet piping to be cooler than the inlet
Answer A
Answer B
II only
Answer C
Both I and II
Answer D
Neither I nor II
If you have a duplex single acting reciprocating pump
249 gpm
making 170 strokes/minute, with a 4" diameter cylinder,
a 11" stroke and operating with 89% volumetric
efficiency, what is the capacity of this pump?
91 gpm
45 gpm
181 gpm
The output capacity of a centrifugal refrigeration
compressor may be controlled manually by
__________.
If a block and tackle arrangement were rigged as shown
in figure "F" in the illustration, the amount of force "P"
required to hold the 262 pound load stationary would be
__________.
If you have a duplex double acting reciprocating pump
making 150 strokes/minute, with a 5" diameter cylinder,
a 7" stroke and operating with 95% volumetric
efficiency, what is the capacity of this pump?
controlling the
compressor speed
throttling the
compressor suction
reducing condenser
water flow
all of the above
methods
52.lbs.
59 lbs.
66 lbs.
87 lbs.
I only
Illustr
GS-0110
85 gpm
119 gpm
42 gpm
170 gpm
If you have a duplex double acting reciprocating pump 49 gpm
making 170 strokes/minute, with a 5" diameter cylinder,
a 4" stroke and operating with 85% volumetric
efficiency, what is the capacity of this pump?
98 gpm
39 gpm
25 gpm
If you have a simplex single acting reciprocating pump 91 gpm
making 180 strokes/minute, with a 3" diameter cylinder,
a 11" stroke and operating with 75% volumetric
efficiency, what is the capacity of this pump?
45 gpm
167 gpm
23 gpm
The reading on the micrometer scale shown in figure "1" 0.800 inch
in the illustration is __________.
The reading on a vernier caliper scale is indicated as
Figure A
1.500 inches. Which of the figures shown in the
illustration represents this reading?
If you have a duplex double acting reciprocating pump 140 gpm
making 150 strokes/minute, with a 6" diameter cylinder,
a 4" stroke with 95% volumetric efficiency, what is the
capacity of this pump?
0.820 inch
0.850 inch
0.875 inch
Figure D
Figure F
Figure G
246
GS-0094
GS-0082
87 gpm
73 gpm
44 gpm
Book Num
11
3242
Ans
A
11
3243
C
11
3244
D
11
3245
A
11
3246
A
11
3247
D
11
3248
D
11
3249
D
11
3250
B
11
11
3252
3253
B
D
Question
Answer A
Your ship has steamed 1945 miles at 21 knots using
332 tons
635 tons of fuel oil. The distance remaining to your next
port is 1750 miles. If you decrease speed to 16 knots,
how much fuel will be used to reach that port?
Answer B
435 tons
Answer C
522 tons
Answer D
1216 tons
If you have a simplex single acting reciprocating pump 856 gpm
making 170 strokes/minute, with a 8" diameter cylinder,
a 13" stroke and operating with 89% volumetric
efficiency, what is the capacity of this pump?
428 gpm
214 gpm
695 gpm
A thermostatic expansion valve is designed to respond
to __________.
refrigerated space
temperature
compressor suction
pressure
superheat in the tail
coil
piping must be
If the fixed material discharge piping between the Ptank and the on-deck outlet of the supply boat becomes flushed with water
clogged and cannot be cleared using normal system air
pressure, the __________.
If you have a duplex double acting reciprocating pump 202 gpm
making 170 strokes/minute, with a 6" diameter cylinder,
a 5" stroke and operating with 97% volumetric
efficiency, what is the capacity of this pump?
air should be
directed through the
jet air line
vapor discharge
pressure in the
cooling coils
air pressure should
be increased beyond
the safety valve
101 gpm
84 gpm
50 gpm
C
D
L
26 gpm
52 gpm
103 gpm
The chordal addendum of the illustrated gear is
A
represented by __________.
If you have a duplex double acting reciprocating pump 72 gpm
making 110 strokes/minute, with a 5" diameter cylinder,
a 7" stroke and operating with 79% volumetric
efficiency, what is the capacity of this pump?
piping must be
disassembled and
cleaned by hand
Which of the screwdriver tips listed will fit screws with a Standard screwdriver Phillips screwdriver
four way or cross type slot?
What is the distinguishing difference between the
The diameter of the The angle of the tip
Phillips and the Reed and Prince type screwdrivers?
shanks.
flukes.
Reed and Prince
Both B and C are
screwdriver
correct
The overall length of None of the above.
the screwdriver.
If you have a duplex double acting reciprocating pump 94 gpm
making 160 strokes/minute, with a 6" diameter cylinder,
a 5" stroke and operating with 96% volumetric
efficiency, what is the capacity of this pump?
188 gpm
78 gpm
47 gpm
If you have a simplex single acting reciprocating pump 412 gpm
making 180 strokes/minute, with a 6" diameter cylinder,
a 11" stroke and operating with 85% volumetric
efficiency, what is the capacity of this pump?
206 gpm
378 gpm
103 gpm
247
Illustr
GS-0111
Book Num
11
11
11
11
11
3255
3256
3258
3259
3260
Ans
B
B
A
Question
If your ship burns 5 tons of fuel per hour at 23 knots,
how many tons per hour will it burn at 18 knots?
Answer A
1.9 tons
Answer B
2.4 tons
Answer C
3.1 tons
Answer D
3.3 tons
If you have a duplex double acting reciprocating pump 108 gpm
making 180 strokes/minute, with a 6" diameter cylinder,
a 5" stroke and operating with 98% volumetric
efficiency, what is the capacity of this pump?
216 gpm
90 gpm
54 gpm
If you have a simplex single acting reciprocating pump 15 gpm
making 270 strokes/minute, with a 3" diameter cylinder,
a 5" stroke and operating with 75% volumetric
efficiency, what is the capacity of this pump?
62 gpm
31 gpm
52 gpm
A 200 wire mesh
screen will prevent
passage of smaller
particles than a 100
wire mesh screen.
A 200 mesh screen A 100 wire mesh
has larger wires than screen will prevent
a 100 mesh screen. passage of smaller
particles than 200
wire mesh screen.
Why is a chemical covering applied to a welding stick
electrode, rather than using a bare electrode?
Protect the welder
from electric shock.
Prevent arc blow.
Shield the arc during Stabilize the electron
the welding process emission rate and
to prevent oxidation. produce uniform
temperatures in the
heat affected zone.
The components labeled "T" in the illustration are
arranged to __________.
take suction from all
areas of the tank
never point at the
bottom of the tank
prevent barite that
settles to the bottom
of the tank from reentering the system
and preserving the
weight of the mud
introduce inert gas to
all areas of the tank
to prevent vapors
from exceeding the
GS-0162
lower explosive level
Three of the refrigerants covered under the low
pressure system regulations are_________.
The device shown in the illustration is used to
__________.
CFC-11, CFC-113
and R-502
process sludge found
on motor vessels
CFC-11, CFC-113
and HCFC-123
process sludge found
on steam vessels
The tool used to prepare copper tubing for the
installation of fittings is called a __________.
swaging tool
stretcher
CFC-11, R-502 and
HCFC-123
process oily-water
mixtures present in
the bilge water
flaring tool
CFC-11, CFC-114
and R-502
condition reduction
gear lube oil by
removing the water
spreader
C
3261
B
11
3262
B
11
3263
C
11
3265
C
A 200 wire mesh
screen and a 100
wire mesh screen
both prevent
passage of the same
size particles, but
each allows a
different number of
particles to pass
through.
Which of the following statements best describes the
filtering ability of a fine mesh metal lube oil strainer?
A
11
Illustr
248
GS-0153
Book Num
11
11
11
11
3266
3267
3268
3269
Ans
D
C
B
C
Question
Answer A
If you have a duplex double acting reciprocating pump 59 gpm
making 140 strokes/minute, with a 5" diameter cylinder,
a 6" stroke and operating with 79% volumetric
efficiency, what is the capacity of this pump?
Answer B
71 gpm
Answer C
30 gpm
Answer D
113 gpm
If you have a duplex double acting reciprocating pump 59 gpm
making 130 strokes/minute, with a 6" diameter cylinder,
a 4" stroke with 93% volumetric efficiency, what is the
capacity of this pump?
If you have a duplex double acting reciprocating pump 98 gpm
making 170 strokes/minute, with a 5" diameter cylinder,
a 7" stroke and operating with 97% volumetric
efficiency, what is the capacity of this pump?
39 gpm
118 gpm
30 gpm
196 gpm
137 gpm
49 gpm
327 tons
Your ship has steamed 2014 miles at 22 knots using
680 tons of fuel oil. The distance remaining to your next
port is 1766 miles. If you decrease speed to 18 knots,
how much fuel will be used to reach that port?
488 tons
399 tons
1220 tons
If you have a duplex double acting reciprocating pump 64 gpm
making 140 strokes/minute, with a 6" diameter cylinder,
a 4" stroke and operating with 94% volumetric
efficiency, what is the capacity of this pump?
43 gpm
129 gpm
32 gpm
depth gage
manhole cover
sounding tube
globe valve
double-seat poppet
valve
reed valve
Globe valve
Gate valve
Needle valve
Charging
Adding oil
All of the above
11
3270
C
11
3271
D
11
3272
A
11
3273
C
The depth of fuel oil in a double bottom tank is
vent line
measured through the __________.
When in the completely opened position, which of the
gate valve
listed types of valve will offer the least resistance to
flow?
If used for regulating fluid flow through a piping system, Plug valve
which of the valves listed could be damaged?
11
3274
D
Which of the operations listed may be accomplished
using connection "E" shown in the illustration?
11
3275
A
11
3276
C
11
3277
A
Purging
Illustr
RA-0003
If you have a duplex double acting reciprocating pump 72 gpm
making 140 strokes/minute, with a 4" diameter cylinder,
a 5" stroke and operating with 94% volumetric
efficiency, what is the capacity of this pump?
36 gpm
45 gpm
18 gpm
The difference between the pressure at a point being
measured and that of a perfect vacuum is known as
__________.
The root opening of the weld, shown in the illustration,
is indicated to be __________.
internal pressure
gauge pressure
absolute pressure
external pressure
not more than 1/8"
a 60° minimum
0 to 1/16'
not specified
249
GS-0076
Book Num
Ans
11
3278
C
11
3279
D
11
3281
C
11
3282
D
11
3283
A
11
3284
B
11
3285
D
11
11
3286
3287
C
B
11
3289
A
11
3290
A
Question
Answer A
If you have a duplex double acting reciprocating pump 29 gpm
making 140 strokes/minute, with a 4" diameter cylinder,
a 8" stroke and operating with 94% volumetric
efficiency, what is the capacity of this pump?
Answer B
57 gpm
Answer C
115 gpm
Answer D
230 gpm
If your ship burns 6 tons of fuel per hour at 22 knots,
how many tons per hour will it burn at 17 knots?
1.7 tons
2.2 tons
2.8 tons
Globe valve
Check valve
Plug cock
236 gpm
103 gpm
414 gpm
3B
4A
1.4 tons
Which of the valves listed below permits flow in only
Gate valve
one direction?
If you have a duplex double acting reciprocating pump 207 gpm
making 160 strokes/minute, with a 7" diameter cylinder,
a 8" stroke and operating with 97% volumetric
efficiency, what is the capacity of this pump?
Which of the listed welded joints represents the least
amount of preparation?
When adding oil to a refrigeration system, precautions
must be taken to ensure that __________.
1B
3A
the compressor
suction pressure is
not too high
the condenser is
all air is purged from the high pressure
cutout switch is held completely shutdown
the pump and
open to prevent
first
charging fittings
accidental starting
A hazard associated with electric arc welding is
__________.
the effects of
flying sparks
radiation from the arc
electric shock
all of the above
If you have a simplex single acting reciprocating pump 210 gpm
making 180 strokes/minute, with a 5" diameter cylinder,
a 7" stroke and operating with 98% volumetric
efficiency, what is the capacity of this pump?
105 gpm
52 gpm
147 gpm
If you have a duplex double acting reciprocating pump 14 gpm
making 120 strokes/minute, with a 3" diameter cylinder,
a 4" stroke and operating with 94% volumetric
efficiency, what is the capacity of this pump?
28 gpm
19 gpm
7 gpm
If you have a duplex double acting reciprocating pump 118 gpm
making 130 strokes/minute, with a 4" diameter cylinder,
a 9" stroke and operating with 93% volumetric
efficiency, what is the capacity of this pump?
59 gpm
133 gpm
30 gpm
The tooth profile of the illustrated gear is represented by F
__________.
H
I
J
250
Illustr
GS-0077
GS-0111
Book Num
11
11
11
3291
3292
3293
Ans
A
A
B
11
3294
B
11
3295
B
11
3296
D
11
3297
A
11
11
3298
3299
A
C
Question
Answer A
Your ship has steamed 2061 miles at 24 knots using
425 tons
850 tons of fuel oil. The distance remaining to your next
port is 1645 miles. If you decrease speed to 19 knots,
how much fuel will be used to reach that port?
Answer B
537 tons
Answer C
625 tons
Answer D
712 tons
Illustr
If you have a duplex double acting reciprocating pump 157 gpm
making 180 strokes/minute, with a 4" diameter cylinder,
a 9" stroke and operating with 89% volumetric
efficiency, what is the capacity of this pump?
78 gpm
176 gpm
39 gpm
Figure "I" shown in the illustration is a diagram of a
100%
valve hand wheel, with S=8 inches and T=50 lbs. When
an 24 inch cheater bar is used instead, and V=50 lbs.,
as shown in Figure "II", what value of additional torque
is now being applied to the hand wheel valve stem?
300%
400%
500%
The discharge valves used in a refrigeration
compressor are leaking badly and __________.
the reeds should be
replaced
should continue to
operate at minimum
efficiency
Globe
Gate
the high pressure cutout should be
readjusted to operate
efficiently
Butterfly
81 gpm
54 gpm
40 gpm
Which of the listed illustrated figures represents the use Figure P
of a lathe finishing tool?
The branch circuits labeled "T" in the illustration are
equalize mud flow
designed to __________.
through all of the
nozzles
Figure S
Figure T
Figure V
flush all parts of the
tank with seawater
during wash down
comply with oil
pollution prevention
regulations
take suction 12' to
14' above the bottom
GS-0162
of the tank
The valve illustrated is to be constructed so that the
__________.
valve can have
additional turns of
packing added when
there is pressure on
either side of the
valve disk
operating lever is
parallel to the flow
when open and
perpendicular to the
flow when closed
valve seat can be
relapped as needed
GS-0109
the reeds should be
reground
Which of the valves listed below is best suited for
Plug
throttling service?
If you have a simplex single acting reciprocating pump 161 gpm
making 170 strokes/minute, with a 6" diameter cylinder,
a 4" stroke and operating with 97% volumetric
efficiency, what is the capacity of this pump?
operating lever is
parallel to the pipe
center line when
closed and
perpendicular to the
pipe center line when
open
251
GS-0090
GS-0055
Book Num
Ans
11
3300
C
11
3301
B
11
3302
B
11
3303
A
11
3304
D
11
3305
B
11
3306
B
11
3307
C
11
3308
A
11
3309
C
11
3310
D
Question
Which of the following statements is correct if the length
of the vessel between perpendiculars is 500 feet, and
the through hull opening is five feet above the summer
loadline for the overboard discharge of the system
illustrated?
Answer A
The inboard valve
only need be positive
closing, in addition to
being of the
automatic non-return
valve type.
Answer B
Answer C
The outboard valve Only one shutoff
only need be positive valve is required.
closing, in addition to
being of the
automatic non-return
valve type.
Answer D
Illustr
Two valves are
required, and each
must be of the
automatic non-return GS-0125
type.
If your ship burns 4 tons of fuel per hour at 21 knots,
how many tons per hour will it burn at 16 knots?
2.3 tons
1.8 tons
1.3 tons
1.1 tons
Which single illustrated lathe tool could be used to turn
down the stock in figure II?
If item "1" shown in the illustration is a compound gage
indicating zero psig and the water level in the bilges is
one foot high, the unit is __________.
A reheater, as used in an air conditioning system, is
designed to control the __________.
If you have a duplex double acting reciprocating pump
making 130 strokes/minute, with a 5" diameter cylinder,
a 11" stroke and operating with 93% volumetric
efficiency, what is the capacity of this pump?
A
B
C
G
not turned on
in the oil discharge
mode
processing the bilge
water
damaged and should
not be used
GS-0153
chilled water
temperature
113 gpm
dew point
temperature
226 gpm
primary air
temperature
249 gpm
dry bulb room
temperature
57 gpm
If you have a duplex double acting reciprocating pump 48 gpm
making 150 strokes/minute, with a 3" diameter cylinder,
a 11" stroke and operating with 95% volumetric
efficiency, what is the capacity of this pump?
96 gpm
176 gpm
24 gpm
Figure A
The reading on a vernier caliper scale is indicated as
2.505 inches. Which of the figures shown in the
illustration represents this reading?
If you have a duplex single acting reciprocating pump
31 gpm
making 270 strokes/minute, with a 3" diameter cylinder,
a 5" stroke and operating with 75% volumetric
efficiency, what is the capacity of this pump?
Figure B
Figure F
Figure G
If you have a duplex double acting reciprocating pump 86 gpm
making 110 strokes/minute, with a 6" diameter cylinder,
a 7" stroke and operating with 91% volumetric
efficiency, what is the capacity of this pump?
Gate valves should not be used for throttling as
__________.
GS-0082
52 gpm
15 gpm
62 gpm
100 gpm
172 gpm
43 gpm
the pressure drop will air binding will
be excessive
develop
252
GS-0009
the installation of an wire drawing of the
equalizing line will be disc will result
necessary
Book Num
11
3311
Ans
C
11
3312
B
11
3313
A
11
3314
A
11
3315
A
11
3316
C
11
3317
B
11
3318
A
11
11
11
3319
3320
3321
C
B
D
Question
Answer A
Your ship has steamed 1951 miles at 20 knots using
569 tons
580 tons of fuel oil. The distance remaining to your next
port is 1861 miles. If you increase speed to 24 knots,
how much fuel will be used to reach that port?
Answer B
664 tons
Answer C
797 tons
Answer D
956 tons
If you have a duplex single acting reciprocating pump
27 gpm
making 110 strokes/minute, with a 3" diameter cylinder,
a 5" stroke and operating with 97% volumetric
efficiency, what is the capacity of this pump?
16 gpm
8 gpm
33 gpm
Which of the figures illustrated would be LEAST
desirable for use as a set screw?
If the air temperature increases while atmospheric
pressure remains constant, the air will __________.
figure A
figure F
figure G
figure L
have a greater
capacity to absorb
moisture
absorb less free
atmospheric
moisture
become
give up moisture as
supersaturated at
condensation
high relative humidity
The lathe tool shown in the illustration as figure "P" is a round nose tool
__________.
If you have a duplex double acting reciprocating pump 48 gpm
making 140 strokes/minute, with a 3" diameter cylinder,
a 12" stroke and operating with 94% volumetric
efficiency, what is the capacity of this pump?
universal tool
parting tool
right hand facing tool
193 gpm
97 gpm
24 gpm
The device shown in the illustration is a/an
__________.
vane type steering
gear
oil scraper ring
stuffing box for a
crosshead engine
Figure E
mechanical shaft
seal
diesel engine motor
mount
The reading on a vernier caliper scale is indicated as
Figure B
3.380 inches. Which of the figures shown in the
illustration represents this reading?
If you have a duplex double acting reciprocating pump 60 gpm
making 180 strokes/minute, with a 4" diameter cylinder,
a 7" stroke and operating with 87% volumetric
efficiency, what is the capacity of this pump?
104 gpm
119 gpm
30 gpm
In the illustrated mud tank system, valve "A" should be
opened to __________.
clean tanks once
they are empty
thin the mud
because the weight
is excessive
fill tanks to improve
stability by reducing
free surface effect
61 gpm
51 gpm
31 gpm
provide cooling for
the diesel driven
pump
If you have a simplex single acting reciprocating pump 123 gpm
making 110 strokes/minute, with a 6" diameter cylinder,
a 5" stroke and operating with 91% volumetric
efficiency, what is the capacity of this pump?
253
Figure D
Illustr
GS-0080
GS-0090
GS-0116
Figure F
GS-0082
GS-0162
Book Num
11
11
3322
3323
Ans
B
D
Question
Answer A
If you have a duplex single acting reciprocating pump
137 gpm
making 170 strokes/minute, with a 5" diameter cylinder,
a 7" stroke and operating with 97% volumetric
efficiency, what is the capacity of this pump?
Answer B
98 gpm
Answer C
49 gpm
Answer D
196 gpm
If you have a duplex double acting reciprocating pump 68 gpm
making 120 strokes/minute, with a 6" diameter cylinder,
a 5" stroke and operating with 91% volumetric
efficiency, what is the capacity of this pump?
56 gpm
34 gpm
134 gpm
control the quantity
of liquid refrigerant
leaving the coil
control the operation
of the solenoid valve
The main purpose of the thermostatic expansion valve
shown in the illustration is to __________.
11
3324
A
11
3325
D
11
3326
D
11
11
11
3327
3328
3329
D
C
C
11
3330
A
11
3331
A
maintain a constant regulate refrigerant
degree of superheat condensation rate
in the gas leaving the
evaporator coil
RA-0007
Operating the compressor and motor as shown in figure severely damaging
5 of the illustration, will result in __________.
the V-grooves of the
pulley
If your ship burns 2.9 tons of fuel per hour at 20 knots, 4.3 tons
how many tons per hour will it burn at 15 knots?
a decrease in the
axial load on the
crankshaft
2.2 tons
a decrease in the
axial load on the
motor shaft
1.6 tons
a decrease in the
normal life of the
drive belts
1.2 tons
If you have a duplex double acting reciprocating pump 187 gpm
making 180 strokes/minute, with a 6" diameter cylinder,
a 10" stroke and operating with 85% volumetric
efficiency, what is the capacity of this pump?
312 gpm
97 gpm
375 gpm
If you have a duplex single acting reciprocating pump
67 gpm
making 100 strokes/minute, with a 7" diameter cylinder,
a 9" stroke and operating with 90% volumetric
efficiency, what is the capacity of this pump?
223 gpm
135 gpm
270 gpm
If you have a duplex single acting reciprocating pump
91 gpm
making 160 strokes/minute, with a 4" diameter cylinder,
a 7" stroke and operating with 85% volumetric
efficiency, what is the capacity of this pump?
26 gpm
52 gpm
104 gpm
If you have a duplex double acting reciprocating pump 226 gpm
making 170 strokes/minute, with a 5" diameter cylinder,
a 9" stroke and operating with 87% volumetric
efficiency,
what is the capacity of this pump?
The tool shown in the illustration is called a
center gage
__________.
113 gpm
204 gpm
57 gpm
thread gage
crotch center
drill gage
254
Illustr
GS-0159
GS-0072
Book Num
Ans
11
3332
D
11
3333
A
11
11
11
11
3334
3335
3336
3337
C
A
C
A
11
3338
D
11
3339
B
11
3340
D
Question
Answer A
If you have a duplex double acting reciprocating pump 214 gpm
making 150 strokes/minute, with a 7" diameter cylinder,
a 9" stroke and operating with 95% volumetric
efficiency, what is the capacity of this pump?
Answer B
275 gpm
Answer C
107 gpm
Answer D
427 gpm
If your ship burns 3 tons of fuel per hour at 19 knots,
how many tons per hour will it burn at 15 knots?
1.5 tons
1.9 tons
2.4 tons
5.3 tons
Which of the statements listed is applicable to the
thermostatic expansion valve shown in the illustration?
It regulates the
It regulates the
amount of superheat temperature of the
at the solenoid valve. refrigerated space.
The external
equalizing pipe is
connected to the
liquid receiver.
279 gpm
If you have a duplex single acting reciprocating pump
140 gpm
making 150 strokes/minute, with a 6" diameter cylinder,
a 8" stroke and operating with 95% volumetric
efficiency, what is the capacity of this pump?
186 gpm
The control bulb is
located on the
evaporator outlet
coil.
70 gpm
If you have a duplex double acting reciprocating pump 163 gpm
making 170 strokes/minute, with a 5" diameter cylinder,
a 13" stroke and operating with 87% volumetric
efficiency, what is the capacity of this pump?
425 gpm
327 gpm
82 gpm
If you have a duplex double acting reciprocating pump 135 gpm
making 120 strokes/minute, with a 6" diameter cylinder,
a 5" stroke and operating with 92% volumetric
efficiency, what is the capacity of this pump?
68 gpm
56 gpm
34 gpm
If you have a simplex double acting reciprocating pump 10 gpm
making 140 strokes/minute, with a 5" diameter cylinder,
a 11" stroke and operating with 94% volumetric
efficiency, what is the capacity of this pump?
39 gpm
61 gpm
123 gpm
Which of the figures illustrated is not suitable for use as figure C
a hex head set screw?
If you have a duplex double acting reciprocating pump 119 gpm
making 150 strokes/minute, with a 5" diameter cylinder,
a 11" stroke and operating with 85% volumetric
efficiency, what is the capacity of this pump?
figure D
figure G
figure L
262 gpm
60 gpm
238 gpm
255
Illustr
RA-0007
GS-0080
Book Num
11
11
11
11
11
11
11
11
3341
3342
3344
3345
3347
3348
3349
3350
Ans
Question
Item "J" in the pump illustration __________.
B
A
B
D
A
B
B
C
Answer A
should be replaced
by a grease fitting for
semi-annual
lubrication
If you have a simplex single acting reciprocating pump 35 gpm
making 150 strokes/minute, with a 6" diameter cylinder,
a 4" stroke and operating with 95% volumetric
efficiency, what is the capacity of this pump?
Answer B
will need to be piped
to a fitting installed in
place of the plug (in
area "C") when the
pump is used for hot
water circulation
Answer C
will need to be piped
to a fitting installed in
place of the plug (in
area "C") when the
pump is used for cool
potable water
Answer D
is provided to vent
the pump of collected
non-condensable
gases
140 gpm
70 gpm
47 gpm
conserve space
allow for removal or
replacement without
shutting down
Refrigeration isolation valves are of the double seated
type in order to __________.
allow for operation as permit repacking
a suction or
under pressure
discharge valve
The illustrated valve is __________.
opened or closed by
moving the control
lever through one or
more complete turns
required to be closed quickly opened when
by moving the control the control lever is
handle counter
rotated one full turn
clockwise
quickly opened by
moving the control
lever by one-quarter
of a turn
If you have a duplex double acting reciprocating pump 453 gpm
making 150 strokes/minute, with a 6" diameter cylinder,
a 13" stroke and operating with 95% volumetric
efficiency, what is the capacity of this pump?
227 gpm
491 gpm
113 gpm
If you have a duplex single acting reciprocating pump
426 gpm
making 170 strokes/minute, with a 7" diameter cylinder,
a 11" stroke and operating with 87% volumetric
efficiency, what is the capacity of this pump?
271 gpm
136 gpm
542 gpm
If you have a simplex double acting reciprocating pump 81 gpm
making 140 strokes/minute, with a 6" diameter cylinder,
a 10" stroke and operating with 94% volumetric
efficiency, what is the capacity of this pump?
161 gpm
268 gpm
322 gpm
If you have a simplex double acting reciprocating pump 33 gpm
making 110 strokes/minute, with a 3" diameter cylinder,
a 5" stroke and operating with 97% volumetric
efficiency, what is the capacity of this pump?
27 gpm
16 gpm
8 gpm
256
Illustr
GS-0129
GS-0055
Book Num
11
11
3351
3352
Ans
B
D
11
3353
B
11
3354
A
11
3355
B
11
3356
B
11
3357
A
11
3358
C
11
3359
D
11
3360
A
11
3361
B
Question
Answer A
If you have a duplex single acting reciprocating pump
133 gpm
making 130 strokes/minute, with a 4" diameter cylinder,
a 9" stroke and operating with 93% volumetric
efficiency, what is the capacity of this pump?
Answer B
59 gpm
Answer C
30 gpm
Answer D
118 gpm
If you have a duplex single acting reciprocating pump
91 gpm
making 150 strokes/minute, with a 4" diameter cylinder,
a 7" stroke and operating with 91% volumetric
efficiency, what is the capacity of this pump?
26 gpm
104 gpm
52 gpm
If you have a duplex double acting reciprocating pump 49 gpm
making 110 strokes/minute, with a 6" diameter cylinder,
a 4" stroke and operating with 91% volumetric
efficiency, what is the capacity of this pump?
98 gpm
33 gpm
25 gpm
The purpose of the water failure switch in a refrigeration
system is to react to a loss of cooling water by
__________.
If a block and tackle arrangement were rigged as shown
in figure "F" in the illustration, the amount of force "P"
required to hold the 400 pound load stationary would be
__________.
If you have a duplex single acting reciprocating pump
making 160 strokes/minute, with a 4" diameter cylinder,
a 12" stroke and operating with 85% volumetric
efficiency, what is the capacity of this pump?
stopping the
compressor
80 lbs.
bypassing refrigerant closing the high
to the receiver
pressure cutout
switch
100 lbs.
133 lbs.
Illustr
opening the high
pressure cutout
switch
200 lbs.
GS-0110
44 gpm
89 gpm
178 gpm
arc blow will burn
your face
214 gpm
the fumes are highly slag and metal
toxic
splatter will get in
your eyes
428 gpm
856 gpm
What is the reading of the vernier micrometer caliper
0.2513 inch
scale shown in figure "A" in the illustration?
The valve labeled "A" in the illustrated system should be clean tanks once
opened to___________. (See illustration GS-0162)
they are empty
0.2517 inch
0.2610 inch
0.2613 inch
thin the mud to
reduce its weight
all the above
If you have a simplex double acting reciprocating pump 71 gpm
making 110 strokes/minute, with a 5" diameter cylinder,
a 4" stroke and operating with 95% volumetric
efficiency, what is the capacity of this pump?
36 gpm
provide cooling for
the diesel driven
pump
28 gpm
You should never watch the arc generated during
serious flash burns
electric arc welder with the naked eye because
will result
__________.
If you have a duplex single acting reciprocating pump
695 gpm
making 170 strokes/minute, with a 8" diameter cylinder,
a 13" stroke and operating with 89% volumetric
efficiency, what is the capacity of this pump?
257
266 gpm
GS-0083
GS-0162
18 gpm
Book Num
Ans
11
3362
A
11
3364
A
Question
The lathe tool shown as figure "U" in the illustration is
commonly known as a/an __________.
Answer B
left cut side-facing
tool
Answer C
Answer D
Illustr
right side end facing universal turning tool
tool
GS-0090
heat exchangers
Evaporators and condensers are two forms of
__________.
If you have a duplex single acting reciprocating pump
341 gpm
making 160 strokes/minute, with a 8" diameter cylinder,
a 11" stroke and operating with 89% volumetric
efficiency, what is the capacity of this pump?
liquid receivers
storage receptacles
flow inhibitors
469 gpm
170 gpm
682 gpm
Which of the listed illustrated figures would not normally Figure T
be used for rough or finish turning operations?
Figure S
Figure P
Figure U
Which of the illustrated lathe tools would be used to
produce a smooth finish cut for figure I?
The lathe tool shown as figure "A" in the illustration is
called a __________.
The lathe tool shown as figure "R" in the illustration
would best be used to __________.
A
D
left cut finishing tool
round nose turning
right hand facing tool
tool
form a left-cut groove form a right-cut
square shoulder
11
3365
A
11
3366
D
11
3367
A
11
3368
A
11
3369
C
11
3370
C
11
3371
D
11
3372
D
11
3373
D
Which of the illustrated lathe tools would be used to
produce a rough cut for figure I?
Which of the listed illustrated figures represents the
lathe tool used for facing figure VI?
Which of the listed illustrated figures represents the
lathe tool used for facing figure VI?
The lathe tool shown as figure "S" in the illustration is
commonly known as a/an __________.
11
3374
B
11
3375
C
11
3376
A
11
3377
D
Answer A
cutting-off tool
GS-0090
F
G
C
F
right hand turning
tool
perform a left-cut
rough turning
operation
G
A
B
C
F
A
B
C
F
right-cut roughing
tool
left-cut side-facing
tool
right-cut side-facing
tool
left-cut roughing tool
A secondary refrigerant commonly used in shipboard air methyl chloride
conditioning systems is __________.
water
carbon dioxide
trichloroethylene
If you have a duplex double acting reciprocating pump 133 gpm
making 110 strokes/minute, with a 7" diameter cylinder,
a 8" stroke and operating with 91% volumetric
efficiency, what is the capacity of this pump?
152 gpm
267 gpm
67 gpm
If you have a simplex single acting reciprocating pump 39 gpm
making 140 strokes/minute, with a 5" diameter cylinder,
a 7" stroke and operating with 94% volumetric
efficiency, what is the capacity of this pump?
157 gpm
78 gpm
110 gpm
While carrying out electric arc welding, there is always
the danger of __________.
fire
electric shock
all of the above
perform a right-cut
rough turning
operation
B
developing burns to
the retina of the eye
258
GS-0009
GS-0009
GS-0090
GS-0009
GS-0009
GS-0009
GS-0090
Book Num
Ans
11
3378
C
11
3381
D
11
3382
D
11
3383
A
11
3384
C
11
11
3385
3386
B
D
11
3387
A
11
3388
D
11
3389
A
Question
Answer A
If you have a duplex single acting reciprocating pump
262 gpm
making 150 strokes/minute, with a 5" diameter cylinder,
a 11" stroke and operating with 85% volumetric
efficiency, what is the capacity of this pump?
Answer B
60 gpm
Answer C
119 gpm
Answer D
238 gpm
A lubricating oil with a high viscosity index number is
most effectively used __________.
as an additive to
depress pour point
as an additive to
slow oxidation
108 gpm
352 gpm
where a wide
variation range in
temperature exist
54 gpm
38 gpm
If you have a duplex single acting reciprocating pump
making 120 strokes/minute, with a 4" diameter cylinder,
a 7" stroke and operating with 83% volumetric
efficiency, what is the capacity of this pump?
76 gpm
80 gpm
169 gpm
The dehydrating agent normally used in a refrigeration slaked lime
system is __________.
If a block and tackle arrangement were rigged as shown 97.8 lbs.
in figure "F" in the illustration, the amount of force "P"
required to hold the 398 pound load stationary would be
__________.
210° C
Coast Guard Regulations (46 CFR) require small
electric storage tank-type hot water boilers, rated at no
more than 600 volts, must be fitted with a temperature
limiting device to prevent the water in the upper 25% of
the tank from attaining a temperature
sodium chloride
activated alumina
calcium chloride
99.5 lbs.
104.5 lbs.
109.5 lbs.
166° C
125° C
99° C
If you have a simplex single acting reciprocating pump 35 gpm
making 150 strokes/minute, with a 6" diameter cylinder,
a 4" stroke and operating with 95% volumetric
efficiency, what is the capacity of this pump?
44 gpm
87 gpm
73 gpm
Which of the illustrated lathe tools would be used to
C
produce a rough cut to the left for the stock in figure IV?
D
E
F
If you have a duplex double acting reciprocating pump 91 gpm
making 180 strokes/minute, with a 3" diameter cylinder,
a 11" stroke and operating with 75% volumetric
efficiency, what is the capacity of this pump?
45 gpm
If you have a simplex single acting reciprocating pump
making 180 strokes/minute, with a 4" diameter cylinder,
a 13" stroke and operating with 85% volumetric
efficiency, what is the capacity of this pump?
in only very high
temperature
installations
216 gpm
Illustr
GS-0110
GS-0009
259
167 gpm
23 gpm
Book Num
11
11
11
3390
3391
3392
Ans
C
C
D
11
3393
D
11
3394
D
11
3395
C
11
11
11
3396
3397
3398
A
D
C
11
3399
D
11
3400
D
Question
The component labeled "B" in the illustration is the
__________.
Answer A
suction line
The illustration is drawn to a scale of 1/16 inch = 1 inch. 1.625 inches
What is the full size dimension of "X", if the scale
lengths for "E" = 5/8", "F" = 1 3/8", "G" = 2 1/8", and "H"
= 5 3/4"?
If you have a duplex double acting reciprocating pump 76 gpm
making 110 strokes/minute, with a 6" diameter cylinder,
a 9" stroke and operating with 91% volumetric
efficiency, what is the capacity of this pump?
Answer B
vent
0.359 inches
Answer C
fill line
26.00 inches
Answer D
fresh water sprinkler
for fluidizing of
pulverized material
Illustr
GS-0163
92.00 inches
GS-0007
151 gpm
193 gpm
221 gpm
unit is in the oil
discharge mode
compound gage
needs to be replaced
If item "1" shown in the illustration is a compound gage
indicating zero psig while processed water is known to
be discharging overboard, the __________.
unit is fouled and
should be cleaned
unit is operating
correctly
Which of the listed components for a refrigeration
system is required for a two box system, but not for a
one box system?
The lathe tool shown as figure "L" in the illustration is
commonly known as a/an __________.
Hand expansion
valve
Automatic expansion High pressure cutout Liquid line solenoid
valve
switch
valve
boring tool
external threading
tool
internal threading
tool
universal turning tool
If you have a simplex single acting reciprocating pump 25 gpm
making 190 strokes/minute, with a 3" diameter cylinder,
a 11" stroke and operating with 77% volumetric
efficiency, what is the capacity of this pump?
98 gpm
49 gpm
181 gpm
If the distilling plant first stage absolute pressure is
higher than normal, while the second stage absolute
pressure remains satisfactory, the probable fault is due
to __________.
If you have a simplex single acting reciprocating pump
making 140 strokes/minute, with a 6" diameter cylinder,
a 4" stroke and operating with 94% volumetric
efficiency, what is the capacity of this pump?
loss of the distillate
loop seal between
the stages
priming in the second failure of the brine
stage
pump
an air leak through a
vacuum gage line in
the first stage
129 gpm
64 gpm
32 gpm
43 gpm
If you have a simplex single acting reciprocating pump 109 gpm
making 170 strokes/minute, with a 3" diameter cylinder,
a 12" stroke and operating with 87% volumetric
efficiency, what is the capacity of this pump?
54 gpm
217 gpm
27 gpm
Which of the illustrated lathe tools would be used to
C
produce a rough cut to the left for the stock in figure IV?
D
E
F
GS-0153
GS-0090
GS-0009
260
Book Num
11
3401
Ans
C
11
3402
D
11
3403
A
11
11
11
11
11
11
3404
3405
3406
3407
3408
3409
A
A
D
A
A
D
Question
The lathe tool shown as figure "R" in the illustration is
commonly known as a/an __________.
Answer A
right-cut roughing
tool
Answer B
left-cut side-facing
tool
Answer C
right-cut side-facing
tool
Answer D
left-cut roughing tool
If you have a duplex single acting reciprocating pump
163 gpm
making 160 strokes/minute, with a 4" diameter cylinder,
a 10" stroke and operating with 75% volumetric
efficiency, what is the capacity of this pump?
33 gpm
131 gpm
65 gpm
The lathe tool shown as figure "T" in the illustration is
commonly known as a/an __________.
left-cut side-facing
tool
right-cut side-facing
tool
left-cut knurling tool
right-cut roughing
tool
The purpose of heating the oil in the sump of a secured reduce the
refrigeration compressor is to __________.
absorption of
refrigerant by the
lubricating oil
If you have a duplex double acting reciprocating pump 479 gpm
making 110 strokes/minute, with a 8" diameter cylinder,
a 11" stroke and operating with 91% volumetric
efficiency, what is the capacity of this pump?
GS-0090
GS-0090
prevent acidic pitting remove entrained
water
remove wax and gum
240 gpm
329 gpm
120 gpm
If you have a simplex single acting reciprocating pump 78 gpm
making 330 strokes/minute, with a 3" diameter cylinder,
a 4" stroke and operating with 96% volumetric
efficiency, what is the capacity of this pump?
39 gpm
52 gpm
19 gpm
If you have a simplex single acting reciprocating pump 47 gpm
making 160 strokes/minute, with a 6" diameter cylinder,
a 5" stroke and operating with 96% volumetric
efficiency, what is the capacity of this pump?
188 gpm
94 gpm
78 gpm
Prior to testing the pyrometer circuit wiring for continuity the driving voltage of
with a multimeter, you should disconnect the pyrometer the meter batteries
because __________.
can damage the
circuit meter
the pyrometer total
resistance can
damage the
ohmmeter
the reactance of the meter current
pyrometer will give a running through the
false meter reading pyrometer will
permanently
magnetize the
pyrometer's pointer
If you have a simplex single acting reciprocating pump
making 160 strokes/minute, with a7" diameter cylinder,
a 8" stroke and operating with 97% volumetric
efficiency, what is the capacity of this pump?
207 gpm
236 gpm
414 gpm
261
Illustr
103 gpm
Book Num
11
11
11
3410
3411
3412
Ans
B
B
A
11
3413
D
11
3414
B
11
3415
D
11
3416
B
11
3417
A
11
3418
B
11
3419
A
11
3420
A
Question
Answer A
If you have a simplex single acting reciprocating pump 119 gpm
making 180 strokes/minute, with a 4" diameter cylinder,
a 7" stroke and operating with 87% volumetric
efficiency, what is the capacity of this pump?
Answer B
30 gpm
Answer C
60 gpm
Answer D
104 gpm
If you have a duplex single acting reciprocating pump
12 gpm
making 170 strokes/minute, with a 3" diameter cylinder,
a 5" stroke and operating with 93% volumetric
efficiency, what is the capacity of this pump?
24 gpm
40 gpm
48 gpm
If you have a simplex single acting reciprocating pump 19 gpm
making 120 strokes/minute, with a 4" diameter cylinder,
a 7" stroke and operating with 83% volumetric
efficiency, what is the capacity of this pump?
38 gpm
66 gpm
76 gpm
The illustration is drawn to a scale of 1/8 inch = 1 inch.
What is the full size dimension of "X", if the scale
lengths for "E" = 5/8", "F" = 1 3/8", "G" = 2 1/8", and "H"
= 5 3/4"?
When the solenoid valves in a refrigeration system have
closed, the compressor will be stopped by the
__________.
If a block and tackle arrangement were rigged as shown
in figure "F" in the illustration, the amount of force "P"
required to hold the 468 pound load stationary would be
__________.
If you have a duplex double acting reciprocating pump
making 180 strokes/minute, with a 5" diameter cylinder,
a 7" stroke and operating with 98% volumetric
efficiency, what is the capacity of this pump?
0.719 inches
46.00 inches
13.00 inches
1.625 inches
Illustr
GS-0007
low water cutout
low pressure cutout
high pressure cutout spring-loaded relief
valve
103 lbs.
109 lbs.
113 lbs.
117 lbs.
GS-0110
105 gpm
210 gpm
147 gpm
52 gpm
The component labeled "F" in the illustration is a
differential valve
__________.
If you have a duplex double acting reciprocating pump 113 gpm
making 120 strokes/minute, with a 5" diameter cylinder,
a 12" stroke and operating with 92% volumetric
efficiency, what is the capacity of this pump?
fill connection
pneumercator
support stanchion
225 gpm
270 gpm
56 gpm
The lathe tools shown as figure "M" in the illustration
form tools
are commonly known as __________.
If you have a simplex single acting reciprocating pump 18 gpm
making 140 strokes/minute, with a 3" diameter cylinder,
a 9" stroke and operating with 94% volumetric
efficiency, what is the capacity of this pump?
curvature cutting
tools
72 gpm
parting tools
universal turning
tools
109 gpm
262
36 gpm
GS-0163
GS-0090
Book Num
11
3421
Ans
D
11
3422
B
11
3423
D
11
3425
C
11
3426
C
Question
The lathe tool shown as figure "N" in the illustration is
commonly known as a/an __________.
3427
3428
11
3429
D
11
3430
C
11
3431
B
Answer D
knurling tool
Illustr
GS-0090
29 gpm
49 gpm
The lathe tool shown as figure "O" in the illustration is
cutting-off
commonly used for __________.
The rudder shown in the illustration is correctly termed balanced rudder
a/an __________.
If you have a simplex single acting reciprocating pump 170 gpm
making 190 strokes/minute, with a 5" diameter cylinder,
a 7" stroke and operating with 75% volumetric
efficiency, what is the capacity of this pump?
left hand side facing
right hand turning
grooving
unbalanced rudder
semi-balanced
rudder
42 gpm
contra-guided rudder
C
C
Answer C
furling tool
15 gpm
A P-type trap and drain is used __________.
11
Answer B
curling tool
If you have a simplex single acting reciprocating pump 59 gpm
making 220 strokes/minute, with a 3" diameter cylinder,
a 5" stroke and operating with 87% volumetric
efficiency, what is the capacity of this pump?
Which of the following statements would apply to the
principle of operation of the device shown in the
illustration?
11
Answer A
hurling tool
85 gpm
Continuing to hold
down "E" will hold "A"
off of its seat,
allowing water to
continuously flow
from chamber "I" to
chamber "III" via
chamber "II".
Once "A" is reseated,
the total force
developed in
chamber "I" will
gradually rise to
exceed the total
force in chamber "II"
and reseat "C" to
stop water flow
through unit.
"D" will be physically
and directly raised by
the movement of "E",
forcing "C" to
become unseated.
for all lavatory sink
installations, as no
other drain type is
useable
whenever the 'gray'
water drain system
connection is
mounted on the deck
as a condensate
drain for
superheaters
21.2 gpm
4
If you have a simplex single acting reciprocating pump 18.2 gpm
making 130 strokes/minute, with a 5" diameter cylinder,
a 4" stroke and operating with 96% volumetric
efficiency, what is the capacity of this pump?
19.2 gpm
In the diagram, shown in the illustration, the swing1
check valve is represented by the item numbered
__________.
If you have a simplex single acting reciprocating pump 157 gpm
making 140 strokes/minute, with a 4" diameter cylinder,
a 11" stroke and operating with 94% volumetric
efficiency, what is the capacity of this pump?
2
3
263
GS-0131
119 gpm
The pressure in
chamber "I" is
greater than the
pressure in chamber
"II", causing part "A"
to close off, and
force "C" into a
closed position.
whenever the 'gray'
water drain system
connection is
mounted on the
bulkhead
20.2 gpm
GS-0090
GS-0155
GS-0125
39 gpm
79 gpm
217 gpm
Book Num
11
11
11
3432
3433
3434
Ans
D
C
A
11
3436
C
11
3437
D
11
3438
A
11
3439
B
11
3440
B
11
3442
C
11
3443
D
11
3444
C
Question
The drains of lavatory sinks are fitted with P-type or Stype traps to __________.
Answer A
Answer B
reduce water velocity create a strong
and minimize erosion siphon effect
If you have a duplex single acting reciprocating pump
71 gpm
making 140 strokes/minute, with a 5" diameter cylinder,
a 6" stroke and operating with 83% volumetric
efficiency, what is the capacity of this pump?
30 gpm
Answer C
provide a cushion of
water to reduce the
effects of water
hammer
59 gpm
Refrigerant flow through a thermostatic expansion valve evaporator is warm
is greatest when the __________.
and empty of
refrigerant
evaporator is cold
and empty of
refrigerant
low side and high
side pressures are
equal
low side pressure
and thermal element
pressure equalize
If you have a simplex single acting reciprocating pump 109 gpm
making 190 strokes/minute, with a 4" diameter cylinder,
a 7" stroke and operating with 75% volumetric
efficiency, what is the capacity of this pump?
54 gpm
27 gpm
95 gpm
In the diagram shown in the illustration, item "3"
relief valve
represents a __________.
If you have a simplex single acting reciprocating pump 37 gpm
making 180 strokes/minute, with a 6" diameter cylinder,
a 4" stroke and operating with 85% volumetric
efficiency, what is the capacity of this pump?
stop valve
gate valve
check valve
150 gpm
75 gpm
50 gpm
The purpose of the component labeled "F" in the
illustration is to __________.
prevent damage to
the slope sheets
bleed excess air from maintain a minimum
the top of the tank
of 15 psia difference
between the aeration
unit and the top head GS-0163
U.S. Coast Guard
285 gpm
American Bureau of
Shipping
142 gpm
Underwriter's
Laboratories
488 gpm
B
D
E
G
pumping it from the
system to a clean
empty drum
draining the system
through the purge
valve connection
pumping all
refrigerant to the
receiver
exhausting it to the
atmosphere
determine the level
of remaining
pulverized material
Sewage treatment systems aboard U.S. inspected
Environmental
vessels must be approved by the __________.
Protection Agency
If you have a simplex single acting reciprocating pump 570 gpm
making 150 strokes/minute, with a 7" diameter cylinder,
a 12" stroke and operating with 95% volumetric
efficiency, what is the capacity of this pump?
Which of the illustrated lathe tools should be used to
produce the groove in the stock in figure VII?
Prior to making repairs on an evaporator located in a
large, multi-box refrigeration system, you should
remove the refrigerant by __________.
264
Answer D
provide a seal
against sewer gas
rising into the
compartment
119 gpm
Illustr
GS-0125
GS-0009
Book Num
11
3445
Ans
B
11
3446
D
11
3447
C
11
11
11
3448
3449
3450
B
D
D
11
3451
C
11
3452
D
11
3453
D
11
3454
D
11
3455
B
Question
What type of valve is shown in the illustration?
Answer A
Globe valve
Answer B
Gate valve
Answer C
Check valve
Answer D
Butterfly valve
If you have a duplex single acting reciprocating pump
10 gpm
making 140 strokes/minute, with a 3" diameter cylinder,
a 11" stroke and operating with 94% volumetric
efficiency, what is the capacity of this pump?
23 gpm
39 gpm
44 gpm
A vacuum differential is maintained in the distillate
steam trap
circuit between any two stages of a multiple stage
distilling plant by the use of a/an __________.
If you have a duplex single acting reciprocating pump
147 gpm
making 180 strokes/minute, with a 5" diameter cylinder,
a 7" stroke and operating with 98% volumetric
efficiency, what is the capacity of this pump?
butterfly valve
loop seal
adjustable controller
105 gpm
52 gpm
210 gpm
If you have a simplex single acting reciprocating pump 37 gpm
making 120 strokes/minute, with a 6" diameter cylinder,
a 11" stroke and operating with 83% volumetric
efficiency, what is the capacity of this pump?
47 gpm
57 gpm
67 gpm
Sacrificial zinc anodes are used on the saltwater side of keep heat transfer
heat exchangers to __________.
surfaces shiny and
clean
prevent rapid
accumulation of
marine growth
provide a protective
coating on heat
exchanger surfaces
reduce electrolytic
action on heat
exchanger metals
If the orifice in the loop seal of a flash evaporator were
to become significantly enlarged through erosion, the
__________.
evaporator absolute
pressure would
eventually equalize
in both stages to that
of the first stage
evaporator absolute
pressure could
eventually equalize
in both stages to that
of the second stage
salt water feed
heater absolute
pressure would
increase to that of
the evaporator
second stage
.15 gpg
.20 gpg
.25 gpg
52 gpm
227 gpm
26 gpm
filter/drier
evaporator
condenser
150 gpm
50 gpm
37 gpm
distillate produced in
the second stage
would flow towards
the first stage
An automatic solenoid dump valve should be set to trip .05 gpg
if the evaporator produces distillate with salt content
exceeding __________.
If you have a simplex single acting reciprocating pump 105 gpm
making 140 strokes/minute, with a 3" diameter cylinder,
a 13" stroke and operating with 94% volumetric
efficiency, what is the capacity of this pump?
In a refrigeration system, air is purged at the
expansion valve
__________.
If you have a duplex double acting reciprocating pump 75 gpm
making 180 strokes/minute, with a 6" diameter cylinder,
a 4" stroke and operating with 85% volumetric
efficiency, what is the capacity of this pump?
265
Illustr
GS-0047
Book Num
11
11
11
11
11
11
11
3456
3457
3458
3459
3460
3461
3462
Ans
A
Question
Answer A
If you have a simplex single acting reciprocating pump 32 gpm
making 140 strokes/minute, with a 5" diameter cylinder,
a 6" stroke and operating with 90% volumetric
efficiency, what is the capacity of this pump?
Answer B
129 gpm
Answer C
64 gpm
Answer D
77 gpm
Regarding the oily water separator shown in the
illustration, what mode of operation is occurring if item
"1" indicates a positive pressure?
The unit is operating
in the bilge water
removal mode
separating the oil
from the water as it
flows through the
unit.
The unit is operating
in the purge mode
and is only removing
air from the upper
level of the tank.
The unit is operating
in the backflush
mode causing any oil
or air to be
discharged to the oil GS-0153
slop tank.
If you have a duplex double acting reciprocating pump 108 gpm
making 180 strokes/minute, with a 4" diameter cylinder,
a 13" stroke and operating with 85% volumetric
efficiency, what is the capacity of this pump?
352 gpm
216 gpm
54 gpm
If you have a simplex single acting reciprocating pump 42 gpm
making 150 strokes/minute, with a 5" diameter cylinder,
a 7" stroke and operating with 95% volumetric
efficiency, what is the capacity of this pump?
170 gpm
85 gpm
119 gpm
The function of item "6", as shown in the illustration, is
to __________.
terminate the oil
discharge mode
determine when
backflushing is
necessary
initiate the oil
discharge mode
sense discharge
temperature to
control the operation GS-0153
of the internal heater
Coast Guard Regulations (46 CFR Part 56) for bilge
and ballast piping require that __________.
all oil and water
tanks be connected
to the bilge system
the bilge pumping
system be operable
under all practicable
conditions
peak tanks and chain all of the above
lockers have
separate electric
pumps
If you have a simplex single acting reciprocating pump 30 gpm
making 120 strokes/minute, with a 4" diameter cylinder,
a 10" stroke and operating with 92% volumetric
efficiency, what is the capacity of this pump?
120 gpm
60 gpm
150 gpm
The illustration is drawn to a scale of 3/16 inch = 1 inch. 1.078 inches
What is the full size dimension of "X", if the scale
lengths for "E" = 5/8", "F" = 1 3/8", "G" = 2 1/8"', and "H"
= 5 3/4"?
The safest and quickest method of adding refrigerant to discharge service
a refrigeration system is to add the refrigerant through valve as a vapor
the __________.
8.667 inches
30.667 inches
1.625 inches
D
C
A
The unit is operating
in the processing
mode and is
currently separating
emulsified bilge
water.
C
B
A
11
3463
B
11
3464
C
266
Illustr
GS-0007
suction service
valves as a liquid
charging valve as a
liquid
condenser relief
valve as a vapor
Book Num
11
11
11
11
11
11
3465
3466
3467
3468
3469
3470
Ans
Question
The component labeled "E" in the illustration is a
__________.
Answer A
high level
alarm/shutdown
B
B
C
D
B
D
11
3471
B
11
3472
D
11
3473
C
11
3474
B
Answer B
Answer C
Answer D
equalization line with differential safety line fresh water inlet to
filter
with a pressure
fluidize the
regulating valve set pulverized material
for approximately
10.5 psig
If you have a simplex single acting reciprocating pump 186 gpm
making 140 strokes/minute, with a 4" diameter cylinder,
a 13" stroke and operating with 94% volumetric
efficiency, what is the capacity of this pump?
47 gpm
93 gpm
302 gpm
If you have a duplex double acting reciprocating pump 75 gpm
making 250 strokes/minute, with a 4" diameter cylinder,
a 7" stroke and operating with 79% volumetric
efficiency, what is the capacity of this pump?
132 gpm
150 gpm
38 gpm
If you have a duplex double acting reciprocating pump 39 gpm
making 330 strokes/minute, with a 3" diameter cylinder,
a 4" stroke and operating with 96% volumetric
efficiency, what is the capacity of this pump?
52 gpm
19 gpm
78 gpm
excessively warm
distillate from
entering the potable
tanks
freshwater tanks
overfilling and
salty distillate from
reaching the potable overflowing the
tanks
potable tanks
contaminated water
from leaving the
potable tanks
reserve feed tank
distilled water tank
bilge
Measures the
hydrogen ion
concentration.
Measures the
electrical resistance
of the water.
Determines the
conductivity of the
dissolved oxygen.
Measures the voltage
of the chloride ions.
In a submerged tube evaporator, the automatic solenoid 0.10 grains per
dump valve will trip if the salinity exceeds __________. gallon
0.15 grains per
gallon
0.20 grains per
gallon
0.25 grains per
gallon
The compound gage shown in the illustration and
labeled as item "1" indicates a slight vacuum while the
unit is in the oil discharge mode. The separator is
__________.
The best time to check the oil level in the compressor in
a typical refrigeration system is when the compressor is
stopped after a long period of running. This is because
the __________.
fouled and needs
cleaning
A solenoid operated distillate bypass valve is installed
in the discharge line between a distilling plant and the
potable water tanks to prevent __________.
If the distillate temperature is 150° F and the distillate
salinity is 0.35 grains per gallon, the three-way solenoid
trip valve should direct the distillate to the __________.
Which of the following statements represents the basic
principle of operation of an electrical salinity indicator?
operating correctly
without the need for
any modification
Illustr
GS-0163
operating correctly, not operating
but requires the gage correctly and also
GS-0153
to be replaced
needs the gage to be
replaced
oil has had time to
refrigerant has had
oil trap has been
oil heaters are
mix properly with the time to separate from able to return
secured; thereby,
refrigerant
the oil
sufficient oil to the
ensuring that a false
sump
level is not read
267
Book Num
11
11
11
3475
3476
3477
Ans
C
A
C
11
3478
B
11
3479
D
11
3480
D
11
3481
D
11
3482
A
11
3483
A
11
3484
B
Question
In the operation of a two-stage flash-type distilling plant,
which of the pumps listed should be vented to the
second stage shell in order to remove vapors from the
pump suction?
If you have a duplex single acting reciprocating pump
making 180 strokes/minute, with a 6" diameter cylinder,
a 11" stroke and operating with 85% volumetric
efficiency, what is the capacity of this pump?
Answer A
Condenser
circulating water
pump
Answer B
Feedwater heater
drain pump
Answer C
Distillate pump
Answer D
Air ejector condenser
drain pump
206 gpm
378 gpm
103 gpm
412 gpm
If you have a simplex single acting reciprocating pump 291 gpm
making 150 strokes/minute, with a 5" diameter cylinder,
a 12" stroke and operating with 95% volumetric
efficiency, what is the capacity of this pump?
145 gpm
73 gpm
349 gpm
The first stage feedwater temperature and shell
absolute pressure in a multistage flash evaporator is
__________.
equal to the second
stage feedwater
temperature and
shell absolute
pressure
higher than the
second stage
feedwater
temperature and
shell absolute
pressure
lower than the
feedwater
temperature and
shell absolute
pressure in the
second stage
higher than the
second stage
feedwater
temperature but at a
lower shell absolute
pressure
In a two stage flash evaporator, operating conditions in
the second stage, as compared to the first stage, are
__________.
In a flash evaporator, heated water under pressure is
converted into vapor by suddenly __________.
higher temperature
and higher absolute
pressure
increasing its
temperature
higher temperature
and lower absolute
pressure
increasing its velocity
lower temperature
and higher absolute
pressure
decreasing its
density
lower temperature
and lower absolute
pressure
decreasing its
pressure
Vapor is produced in a flash evaporator by introducing
__________.
Feedwater supplied to a flash type distilling plant will
flash to vapor in the first-stage due to the flash chamber
__________.
steam through
heating coils
pressure being lower
than the saturation
pressure
corresponding to the
feedwater
temperature
steam through
cooling coils
temperature being
higher than the
evaporation
temperature of the
supplied feedwater
heated water into a
high pressure area
heat exchange
surfaces being
directly in the path of
the entering
feedwater
heated water into a
low pressure area
orifices finely
atomizing the heated
feedwater entering
the flash chamber
A flash type distilling plant is more efficient than a high
pressure evaporator as __________.
I. vaporization of the feed water occurs in a vacuum
II. boiling of feed water occurs only once on the tube
surfaces
I only
II only
Both I and II
Neither I nor II
When one belt of a multiple V-belt compressor drive
the old belts would
requires replacement, all of the belts must be replaced, otherwise carry all
because __________.
the load
268
new belts are shorter new belts have a
than old belts
tendency to slip
all the above
Illustr
Book Num
11
11
11
3486
3487
3488
Ans
B
C
D
11
3489
D
11
3490
B
11
3491
B
11
3492
D
11
3493
C
11
3494
B
11
3495
D
Question
Answer A
If you have a duplex single acting reciprocating pump
388 gpm
making 180 strokes/minute, with a 5" diameter cylinder,
a 13" stroke and operating with 75% volumetric
efficiency, what is the capacity of this pump?
Answer B
149 gpm
Answer C
75 gpm
Answer D
298 gpm
If you have a simplex single acting reciprocating pump 38 gpm
making 160 strokes/minute, with a 3" diameter cylinder,
a 4" stroke and operating with 95% volumetric
efficiency, what is the capacity of this pump?
19 gpm
9 gpm
25 gpm
If you have a duplex single acting reciprocating pump
217 gpm
making 140 strokes/minute, with a 4" diameter cylinder,
a 11" stroke and operating with 94% volumetric
efficiency, what is the capacity of this pump?
39 gpm
157 gpm
79 gpm
If you have a simplex single acting reciprocating pump 67 gpm
making 110 strokes/minute, with a 4" diameter cylinder,
a 6" stroke and operating with 93% volumetric
efficiency, what is the capacity of this pump?
33 gpm
50 gpm
17 gpm
In a double-effect submerged tube evaporator, the brine
density should be prevented from falling below
1.5/32nds to minimize __________.
In a double-effect submerged tube evaporator, the brine
density should be prevented from falling below
1.5/32nds to minimize __________.
In the operation of a two-stage flash type distilling plant,
the rate of scale formation is greatly reduced by
__________.
scale formation on
the tube nests
loss in capacity and
economy
corrosion in the
evaporator
carryover in the
evaporator
scale formation on
the tube nests
loss in capacity and
maintain plant
efficiency
maintaining a
relatively high
feedwater
temperature
corrosion in the
evaporator
carryover in the
evaporator
the fact that no
boiling occurs on
heat transfer
surfaces anywhere in
the unit
operating the firststage regulator to
maintain a constant
shell pressure
operating the unit at
its rated capacity
The rate of scale formation in a flash type distilling plant operating the unit at
is greatly reduced by __________.
its rated capacity
maintaining a
relatively high
feedwater
temperature
the fact that the firststage regulator
keeps the heater
shell at a constant
pressure
water flashing into
vapor rather than
boiling on the heat
transfer surfaces
A common secondary refrigerant used in air
R-123
conditioning systems aboard ship is __________.
A high reading is indicated at the salinity cells labeled
a leak in item "I"
"Y", "Q", and "6" shown in the illustration. This would be
the probable result of __________.
water
nitrogen
hydrogen
faulty cells at each
location
erosion of item "2"
carryover in first
effect shell
269
Illustr
GS-0053
Book Num
11
3496
Ans
C
11
3497
B
11
3498
D
11
3499
A
11
11
3500
3501
D
D
Question
Answer A
If you have a simplex single acting reciprocating pump 113 gpm
making 190 strokes/minute, with a 3" diameter cylinder,
a 13" stroke and operating with 75% volumetric
efficiency, what is the capacity of this pump?
Answer B
57 gpm
Answer C
28 gpm
A high reading is only indicated at the salinity cells
a tube leak in item
labeled "W" and "6" shown in the illustration. This would 'IV', which
be the probable result of __________.
contributes to a
surging absolute
pressure in "III"
Scale accumulation on evaporator heating surfaces will immediate loss of
cause __________.
vacuum
If you have a duplex single acting reciprocating pump
285 gpm
making 150 strokes/minute, with a 7" diameter cylinder,
a 12" stroke and operating with 95% volumetric
efficiency, what is the capacity of this pump?
a faulty cell at
location "6" and a
tube leak in item 'IV'
erosion of item "3" or carryover from "III"
the valve opened too
wide if used
increased distillate
quality
488 gpm
immediate tube
failure
142 gpm
If the rated distillate production of a submerged tube
chemical feed must
type evaporator cannot be maintained with the supplied be increased
maximum steam flow rate, the evaporator __________.
has a serious brine
leak
temperature switch is heating surfaces are
defective
scaled
If you have a simplex single acting reciprocating pump 189 gpm
making 120 strokes/minute, with a 6" diameter cylinder,
a 7" stroke and operating with 92% volumetric
efficiency, what is the capacity of this pump?
95 gpm
110 gpm
47 gpm
equalize the
pressure between
the top of the tank
and the aeration
device when
discharging material
equalize pressure on
either side of the
slope sheet when
filling tank
GS-0163
The purpose of the component labeled "E" in the
illustration is to __________.
11
3502
D
11
3503
C
11
3505
C
determine the level relieve pressure if
of pulverized material the compressed air
flow rate exceeds
600 CFM
Answer D
246 gpm
164 gpm
82 gpm
55 gpm
When any low pressure distilling plant is operated at
less than the designed vacuum, the __________.
capacity increases
scale formation
increases
distillate purity
increases
270
GS-0053
reduced evaporator
capacity
570 gpm
If you have a duplex single acting reciprocating pump
41 gpm
making 190 strokes/minute, with a 6" diameter cylinder,
a 4" stroke and operating with 88% volumetric
efficiency, what is the capacity of this pump?
heat level drops
Illustr
Book Num
11
11
11
11
3506
3507
3508
3510
Ans
D
B
B
A
11
3511
B
11
3512
C
11
3513
D
11
3514
D
11
11
3515
3516
A
A
Question
Answer A
If you have a simplex single acting reciprocating pump 281 gpm
making 190 strokes/minute, with a 5" diameter cylinder,
a 10" stroke and operating with 87% volumetric
efficiency, what is the capacity of this pump?
Answer B
141 gpm
Answer C
281 gpm
Answer D
70 gpm
If you have a simplex single acting reciprocating pump 56.6 gpm
making 150 strokes/minute, with a 5" diameter cylinder,
a 11" stroke and operating with 85% volumetric
efficiency, what is the capacity of this pump?
59.6 gpm
68.5 gpm
119.2 gpm
If you have a simplex single acting reciprocating pump 167 gpm
making 160 strokes/minute, with a 4" diameter cylinder,
a 11" stroke and operating with 90% volumetric
efficiency, what is the capacity of this pump?
43 gpm
82 gpm
229 gpm
While the illustrated system is operated using the steam a reduction in
supply through "F" the strainer in line "4" becomes
distillate production
fouled, this will result in __________.
pump "K" becoming
vapor bound
the temperature
regulated by "L"
difficult to maintain
nothing unusual for
the type of operation
indicated as this line
was unnecessary in GS-0053
the installation
If you have a duplex single acting reciprocating pump
227 gpm
making 140 strokes/minute, with a 3" diameter cylinder,
a 13" stroke and operating with 94% volumetric
efficiency, what is the capacity of this pump?
52 gpm
26 gpm
105 gpm
An excessively high brine level in a flash evaporator can excessive brine
be caused by __________.
pump motor speed
If you have a duplex double acting reciprocating pump 19 gpm
making 120 strokes/minute, with a 4" diameter cylinder,
a 7" stroke and operating with 83% volumetric
efficiency, what is the capacity of this pump?
an excessive brine
blowdown rate
38 gpm
failure of the brine
pump
66 gpm
excessive distillate
pump speed
76 gpm
The refrigeration system valve shown in the illustration box temperature
is used to control the __________.
If you have a simplex single acting reciprocating pump 34 gpm
making 120 strokes/minute, with a 6" diameter cylinder,
a 5" stroke and operating with 92% volumetric
efficiency, what is the capacity of this pump?
coil back pressure
135 gpm
'on-off' cycle of the
compressor
68 gpm
superheat at the coil
outlet
56 gpm
If you have a simplex single acting reciprocating pump 34 gpm
making 230 strokes/minute, with a 4" diameter cylinder,
a 7" stroke and operating with 78% volumetric
efficiency, what is the capacity of this pump?
137 gpm
68 gpm
120 gpm
271
Illustr
RA-0007
Book Num
11
3517
Ans
A
11
3518
C
11
3519
D
11
3520
B
Question
Answer A
If you have a simplex single acting reciprocating pump 45 gpm
making 170 strokes/minute, with a 4" diameter cylinder,
a 11" stroke and operating with 89% volumetric
efficiency, what is the capacity of this pump?
Answer B
181 gpm
Answer C
91 gpm
Answer D
249 gpm
If you have a simplex single acting reciprocating pump 375 gpm
making 180 strokes/minute, with a 6" diameter cylinder,
a 10" stroke and operating with 85% volumetric
efficiency, what is the capacity of this pump?
187 gpm
94 gpm
312 gpm
In a shell-and-tube type heat exchanger, the most
loose tube bundle
common cause of decreased performance is
baffle plates
__________.
If you have a duplex double acting reciprocating pump 428 gpm
making 170 strokes/minute, with a 8" diameter cylinder,
a 13" stroke and operating with 89% volumetric
efficiency, what is the capacity of this pump?
failure of the baffle
plate
rupture of the tube
bundle
fouling on the
seawater side
856 gpm
695 gpm
214 gpm
a measure of the
water in a lube oil
system
an emulsion of
grades of oil
the ability of oil to
separate from an oil
and water emulsion
If you have a duplex single acting reciprocating pump
526 gpm
making 140 strokes/minute, with a 6" diameter cylinder,
a 14" stroke and operating with 94% volumetric
efficiency, what is the capacity of this pump?
113 gpm
226 gpm
451 gpm
What precaution should be taken when transporting oil The recirculation
based mud, with the system illustrated, as compared to nozzles "T" need to
water based mud?
be changed over to
oil based nozzles.
The sea chest valve
"A" should be closed
to prevent the oil
from entering the
water.
near the evaporator
coil inlet
A spill containment
area must be
provided under the
tank vent.
The tank must be
provided with a
protective coating no GS-0162
less than 20 mil
thick.
at the solenoid valve
outlet
eye shields and
gloves are worn
loose clothing and
all of the above
jewelry are not worn
170 gpm
119 gpm
Demulsibility of lube oil is defined as __________.
11
11
3521
3522
D
C
11
3523
C
11
3524
A
11
3525
D
11
3526
B
In a refrigeration system, the thermal expansion valve
sensing bulb is located __________.
the temperature at
which oil flows
rapidly
near the evaporator
coil outlet
Some of the hazards of working with electric power
they are properly
tools may be avoided if the operator insures that
grounded
__________.
If you have a duplex double acting reciprocating pump 85 gpm
making 190 strokes/minute, with a 5" diameter cylinder,
a 7" stroke and operating with 75% volumetric
efficiency, what is the capacity of this pump?
272
on the liquid line
strainer
42 gpm
Illustr
Book Num
11
3527
Ans
C
11
3528
D
11
3529
A
11
3530
C
11
11
3531
3532
B
B
11
3533
D
11
3534
C
11
3535
C
11
11
3536
3537
C
C
Question
If a bolt or stud were to break off flush at the surface,
which of the listed actions would probably be the best
first step to begin the process of its removal?
Answer A
Tap the bolt with a
starting punch
extractor.
If you have a simplex single acting reciprocating pump 157 gpm
making 180 strokes/minute, with a 4" diameter cylinder,
a 9" stroke and operating with 89% volumetric
efficiency, what is the capacity of this pump?
When using a portable droplight, you should always
insure that __________.
Answer B
Answer C
Heat the bolt with an Drill a hole in the
oxyacetylene torch. center of the broken
stud.
Answer D
Use a tapered screw
extractor only.
78 gpm
176 gpm
39 gpm
the bulb capacity
does not exceed 75
watts
tailstock
all of the above
chuck
the bulb is protected the extension cord is
by a shield or guard yellow and clearly
marked
compound rest
headstock
To properly use a lathe crotch center to drill an oil hole
in a bushing, you would mount the crotch center in the
__________.
If you have a simplex single acting reciprocating pump 108 gpm
making 120 strokes/minute, with a 6" diameter cylinder,
a 4" stroke and operating with 92% volumetric
efficiency, what is the capacity of this pump?
27 gpm
54 gpm
36 gpm
When machining a long piece of work between centers, make sure that the
you must __________.
lathe dog is securely
jammed in the slot of
the face plate
correct for expansion
of the work by
readjusting the
tailstock center
make sure that the
work is only
supported by the
headstock center
make sure the
tailstock is tight
against the work
If you have a duplex single acting reciprocating pump
302 gpm
making 140 strokes/minute, with a 4" diameter cylinder,
a 13" stroke and operating with 94% volumetric
efficiency, what is the capacity of this pump?
47 gpm
186 gpm
93 gpm
In a direct expansion refrigeration evaporator, the coils
are __________.
To ensure the stock is running true in a lathe, you
should use a __________.
If you have a simplex single acting reciprocating pump
making 180 strokes/minute, with a 6" diameter cylinder,
a 5" stroke and operating with 98% volumetric
efficiency, what is the capacity of this pump?
covered with
insulation
center gage
half covered with
insulation
gage block
surrounded by air
surrounded by Freon
dial indicator
micrometer
216 gpm
108 gpm
54 gpm
90 gpm
If you have a duplex double acting reciprocating pump 160 gpm
making 190 strokes/minute, with a 5" diameter cylinder,
a 11" stroke and operating with 90% volumetric
efficiency, what is the capacity of this pump?
352 gpm
320 gpm
80 gpm
273
Illustr
Book Num
11
11
3538
3539
Ans
A
A
11
3540
B
11
3541
D
11
3542
C
11
3543
C
11
3544
B
11
3545
B
11
3546
A
11
11
3547
3548
D
C
Question
Answer A
If you have a simplex single acting reciprocating pump 75 gpm
making 160 strokes/minute, with a 6" diameter cylinder,
a 9" stroke and operating with 85% volumetric
efficiency, what is the capacity of this pump?
Answer B
300 gpm
To properly cut even numbered threads using the lathe any line on the dial
thread dial indicator shown in the illustration, you should
close the lathe split or half-nut on __________.
even numbered lines odd numbered lines
only
only
any unnumbered half
line
To properly cut an odd numbered thread with a lathe
using the thread dial indicator illustrated, you should
close the lathe feed half-nut on __________.
any line on the dial
any numbered line
on the dial
even numbered lines
only
When using a wheel dressing tool to true up a grinding
wheel, you should always __________.
lubricate the dressing operate the grinder in remove the tool rest
tool
neutral
from the grinder
checkering
The operation of machining a uniformly roughened or
checked surface on round stock in a lathe is called
__________.
If you have a simplex single acting reciprocating pump 115 gpm
making 140 strokes/minute, with a 4" diameter cylinder,
a 8" stroke and operating with 92% volumetric
efficiency, what is the capacity of this pump?
Answer C
150 gpm
odd numbered lines
only
Answer D
225 gpm
knurling
swaging
57 gpm
28 gpm
115 gpm
discharge line
bypass
cylinder unloader
suction line bypass
relief valve
hole will be drilled
too large
145 gpm
hole will take longer
to drill
349 gpm
drill will not center
properly
73 gpm
drill will cut
undersized
291 gpm
If you have a duplex single acting reciprocating pump
246 gpm
making 190 strokes/minute, with a 3" diameter cylinder,
a 13" stroke and operating with 75% volumetric
efficiency, what is the capacity of this pump?
28 gpm
113 gpm
57 gpm
If you have a simplex single acting reciprocating pump 35 gpm
making 160 strokes/minute, with a 8" diameter cylinder,
a 9" stroke and operating with 89% volumetric
efficiency, what is the capacity of this pump?
70 gpm
139 gpm
280 gpm
274
GS-0084
GS-0084
wear goggles to
protect your eyes
crosshatching
A device used to hold open the refrigeration
compressor suction valve during starting is called a
__________.
If the point angle of a drill is less than 59°, the
__________.
If you have a duplex single acting reciprocating pump
making 150 strokes/minute, with a 5" diameter cylinder,
a 12" stroke and operating with 95% volumetric
efficiency, what is the capacity of this pump?
Illustr
-
Book Num
Ans
11
3549
B
11
3550
A
11
3551
B
11
3552
D
11
3553
D
Question
As the drill bit is being fed into a metal work piece, a
squeaking sound from the tip of the bit indicates
__________.
In the illustration, line "D" is a/an __________.
3554
C
11
3555
D
11
11
11
3556
3557
3558
B
A
D
Answer D
a continuous chip is
being taken by the
drill bit
phantom line
If you have a duplex single acting reciprocating pump
32 gpm
making 140 strokes/minute, with a 5" diameter cylinder,
a 6" stroke and operating with 90% volumetric
efficiency, what is the capacity of this pump?
64 gpm
77 gpm
129 gpm
If you have a simplex single acting reciprocating pump 164 gpm
making 190 strokes/minute, with a 6" diameter cylinder,
a 4" stroke and operating with 88% volumetric
efficiency, what is the capacity of this pump?
82 gpm
55 gpm
41 gpm
What does "G" represent in the illustration?
The type of material
used for the piece.
A dimension
A reference note
tabulated elsewhere. shown elsewhere.
prevent vibration of
the compressor
connect refrigeration
machinery and
associated piping
when there is a
misalignment
problem
reduce noise and
vibration from
traveling along the
piping which could
ultimately damage
distant downstream
equipment
all of the above
Which of the following problems will cause a twist drill to Improper lip
cut improperly?
clearance
If you have a simplex single acting reciprocating pump 226 gpm
making 170 strokes/minute, with a 5" diameter cylinder,
a 9" stroke and operating with 87% volumetric
efficiency, what is the capacity of this pump?
Improper cutting
angle
57 gpm
Improper clearance
angle
113 gpm
All of the above
204 gpm
If you have a duplex double acting reciprocating pump 48 gpm
making 170 strokes/minute, with a 3" diameter cylinder,
a 5" stroke and operating with 93% volumetric
efficiency, what is the capacity of this pump?
40 gpm
24 gpm
12 gpm
If you have a simplex single acting reciprocating pump 169 gpm
making 120 strokes/minute, with a 5" diameter cylinder,
a 9" stroke and operating with 92% volumetric
efficiency, what is the capacity of this pump?
84 gpm
152 gpm
42 gpm
The refrigeration piping component shown in the
illustration is primarily used to __________.
11
Answer A
Answer B
Answer C
the bit is too large for the bit tip has not
insufficient force has
the hole
been properly ground been applied on the
drill bit
hidden line
sectioning line
outline
275
The surfaces to be
ground.
Illustr
GS-0006
GS-0017
RA-0002
Book Num
11
11
11
3559
3560
3561
Ans
C
B
C
11
3562
D
11
3564
B
11
3566
C
11
11
11
11
3567
3568
3569
3570
C
C
A
A
Question
A dimension line, as used in a drawing or blueprint, is
represented by which of the figures shown in the
illustration?
The illustrated shaft has an overall length of 18 inches.
If the diameter of "E" = 2.5" and "F" = 3.5", with an
indicated radius of "R" = .125" and the length of the
tapered section "X" is to be 8"; then the amount of
tailstock offset should be __________.
Answer A
A
Answer B
B
Answer C
C
Answer D
Illustr
D
GS-0031
0.1110"
0.5625"
0.6250"
1.1250"
GS-0133
If you have a duplex single acting reciprocating pump
270 gpm
making 140 strokes/minute, with a 5" diameter cylinder,
a 11" stroke and operating with 94% volumetric
efficiency, what is the capacity of this pump?
246 gpm
123 gpm
62 gpm
If you have a simplex single acting reciprocating pump 295 gpm
making 170 strokes/minute, with a 5" diameter cylinder,
a 12" stroke and operating with 85% volumetric
efficiency, what is the capacity of this pump?
147 gpm
354 gpm
74 gpm
Which of the fluids listed is suitable for use as a
secondary refrigerant?
The crosshatch design on the end of piece "3" in the
illustration shown indicates that __________.
Brine
Carbon dioxide
Cuprous chloride
Methyl alcohol
the piece is screwed the piece is made of piece #3 is knurled in piece #3 is made of
into piece #2
mild carbon steel
that area
stainless steel
If you have a duplex single acting reciprocating pump
30 gpm
making 170 strokes/minute, with a 4" diameter cylinder,
a 7" stroke and operating with 92% volumetric
efficiency, what is the capacity of this pump?
119 gpm
60 gpm
104 gpm
If you have a duplex single acting reciprocating pump
268 gpm
making 140 strokes/minute, with a 6" diameter cylinder,
a 10" stroke and operating with 94% volumetric
efficiency, what is the capacity of this pump?
81 gpm
161 gpm
322 gpm
If you have a duplex single acting reciprocating pump
45 gpm
making 180 strokes/minute, with a 3" diameter cylinder,
a 11" stroke and operating with 75% volumetric
efficiency, what is the capacity of this pump?
167 gpm
23 gpm
91 gpm
If you have a simplex single acting reciprocating pump
making 120 strokes/minute, with a 6 diameter cylinder,
a 11" stroke and operating with 92% volumetric
efficiency, what is the capacity of this pump?
297 gpm
149 gpm
273 gpm
74 gpm
276
GS-0020
Book Num
11
11
3571
3572
Ans
B
3573
B
11
3574
B
11
3575
D
3576
Answer B
Answer C
allow more time for remove all water
particulate matter to entrained in the
settle out of the oil
returning oil stream
before being pumped
Answer D
maintain a constant
viscosity source of oil
at the pump suction
If you have a duplex single acting reciprocating pump
42 gpm
making 190 strokes/minute, with a 5" diameter cylinder,
a 7" stroke and operating with 75% volumetric
efficiency, what is the capacity of this pump?
85 gpm
119 gpm
170 gpm
What precaution should be taken when transporting oil The recirculation
based mud, with the system illustrated, when compared nozzles "T" need to
to water based mud?
be changed over to
oil based nozzles.
All tank cleaning and
disposal must be
done at an approved
disposal pit.
The seal cage line
valve "C" must be
shifted to fresh water
to prevent damage to
the pump seal.
The tank must be
coated with a
protective covering
no less than 20 mil
thick.
In a refrigeration system, silica gel is used in the
__________.
In the illustration shown, which of the lines are
considered as 'visible lines' in blueprint reading?
dehydrator
liquid strainer
hygrometer
B
11
11
Question
Baffles are provided in the main lube oil sump tank of
the pressurized lube oil system, shown in the
illustration, to __________.
A
If you have a simplex single acting reciprocating pump
making 160 strokes/minute, with a 6" diameter cylinder,
a 13" stroke and operating with 89% volumetric
efficiency, what is the capacity of this pump?
Hidden edges in objects are represented in blueprints
by __________.
11
11
11
3577
3578
3580
Answer A
create a dam effect
to concentrate
heavily contaminated
oil in one area
making it much
easier to clean
condenser
D
SE-0011
GS-0162
The line indicated by The line indicated by The lines indicated
letter "A" only.
letter "B" only.
by the letters "B" and
"D".
113 gpm
453 gpm
227 gpm
The lines indicated
by the letters "A" and GS-0033
"D".
491 gpm
a thin solid line
a thick solid line
dashed lines having
alternating long and
short dashes
dashed lines having
approximately equal
length dashes
If you have a simplex single acting reciprocating pump 62 gpm
making 100 strokes/minute, with a 4" diameter cylinder,
a 7" stroke and operating with 82% volumetric
efficiency, what is the capacity of this pump?
31 gpm
55 gpm
16 gpm
Line "C" as shown in the illustration represents
__________.
a mechanical
connection between
the two items
illustrated
a hidden line
the center of the
items illustrated
D
D
Illustr
the diameter of the
hole
277
GS-0033
Book Num
11
3581
Ans
B
11
3582
B
11
3583
D
Question
Answer A
If you have a simplex single acting reciprocating pump 298 gpm
making 180 strokes/minute, with a 5" diameter cylinder,
a 13" stroke and operating with 75% volumetric
efficiency, what is the capacity of this pump?
Answer B
75 gpm
Answer C
149 gpm
Answer D
388 gpm
If you have a simplex single acting reciprocating pump
making 130 strokes/minute, with a 4 diameter cylinder,
a 12" stroke and operating with 93% volumetric
efficiency, what is the capacity of this pump?
158 gpm
39 gpm
79 gpm
237 gpm
A
B
C
D
control the
refrigerated
compartment
temperature
bypass refrigerant
flow to the
evaporator
maintain the proper stop the compressor
refrigerant superheat when the evaporator
reaches the proper
temperature
rod with a
conventional break
tube with a broken
out section
pipe with a missing
center section
bar with a sawn out
section
If you have a simplex single acting reciprocating pump 526 gpm
making 160 strokes/minute, with a 6" diameter cylinder,
a 14" stroke and operating with 96% volumetric
efficiency, what is the capacity of this pump?
132 gpm
263 gpm
614 gpm
If you have a simplex single acting reciprocating pump 12 gpm
making 170 strokes/minute, with a 3" diameter cylinder,
a 5" stroke and operating with 93% volumetric
efficiency, what is the capacity of this pump?
48 gpm
24 gpm
40 gpm
A 'centerline' depicted in a drawing or blueprint is
represented by which of the figures shown in the
illustration?
Cracks may be prevented from developing at the
corners of welded plate inserts by __________.
The exploded drawing shown in the illustration is
intended to show the __________.
E
D
C
11
3584
A
In a schematic drawing, when an edge of a component
is indicated as being located inside an enclosure, which
line should be used?
The primary purpose of a thermostatic controlled
solenoid valve used in a multi-box refrigeration system
is to __________.
11
3585
A
The illustration shown represents a blueprint of a metal
__________.
11
3586
B
11
3588
A
11
3589
B
11
3590
B
11
3591
B
11
3592
B
If you have a duplex double acting reciprocating pump
making 190 strokes/minute, with a 3" diameter cylinder,
a 13" stroke and operating with 75% volumetric
efficiency, what is the capacity of this pump?
Illustr
GS-0031
A
GS-0028
GS-0031
squaring the corners rounding the corners plug welding the
corners
total number of parts parts aligned for the disassembled
in the assembled
correct order of
component in a one
component
reassembly
point perspective
view
57 gpm
113 gpm
246 gpm
278
slot welding the
corners
parts without using
hidden lines
28 gpm
GS-0025
Book Num
11
11
11
11
3593
3594
3596
3597
Ans
C
B
C
C
11
3598
B
11
3599
D
11
3601
A
11
3602
C
11
3603
D
11
3604
C
11
3606
D
11
3607
D
Question
Answer A
If you have a simplex single acting reciprocating pump 320 gpm
making 190 strokes/minute, with a 5" diameter cylinder,
a 11" stroke and operating with 90% volumetric
efficiency, what is the capacity of this pump?
Answer B
160 gpm
Answer C
80 gpm
Answer D
352 gpm
The purpose of running a refrigeration compressor
motor in short intermittent spurts when starting the
system after a prolonged shutdown is to __________.
insure proper
operation of the
compressor
let the refrigerated
compartment cool
gradually
determine actual
compressor oil level
If you have a simplex single acting reciprocating pump 603 gpm
making 160 strokes/minute, with a 7" diameter cylinder,
a 13" stroke and operating with 87% volumetric
efficiency, what is the capacity of this pump?
301 gpm
151 gpm
560 gpm
If you have a simplex single acting reciprocating pump 20 gpm
making 120 strokes/minute, with a 4" diameter cylinder,
a 13" stroke and operating with 92% volumetric
efficiency, what is the capacity of this pump?
29 gpm
39 gpm
50 gpm
If you have a simplex single acting reciprocating pump 119 gpm
making 170 strokes/minute, with a 4" diameter cylinder,
a 7" stroke and operating with 92% volumetric
efficiency, what is the capacity of this pump?
30 gpm
60 gpm
104 gpm
A hidden line in a drawing, or blueprint is represented in A
the illustration by which of the labeled lines?
B
C
D
In the illustration, line "C" is a __________.
leader line
cutting plane line
phantom line
If you have a simplex single acting reciprocating pump 109 gpm
making 120 strokes/minute, with a 5" diameter cylinder,
a 6" stroke and operating with 89% volumetric
efficiency, what is the capacity of this pump?
54 gpm
27 gpm
65 gpm
By which of the listed methods may heat be transferred
from one body to another?
If only the chill box solenoid valve remains open, the
refrigeration compressor will eventually be stopped by
__________.
Careful handling of compressed gas bottles should
include __________.
Radiation
Convection
Conduction
All of the above
chill box thermostatic low water cutout
temperature switch switch
low pressure cutout
switch
high pressure cutout
switch
stowing, to avoid
them from crashing
into one another
keeping the valve
protection caps in
place
all of the above
Heat may be transferred by __________.
conduction
radiation
all of the above
allow refrigerant
vapor cycling time
Illustr
GS-0031
dimension line
279
keeping them away
from flame, high
heat, and direct
sunlight
convection
GS-0006
Book Num
11
3608
Ans
C
11
3609
D
11
3611
A
11
3612
D
11
3613
B
11
11
3614
3615
B
C
11
3616
C
11
3617
D
11
3618
C
11
3619
A
Question
Answer A
How many BTUs must be added to one pound of water 16 BTU's
at 32° F to raise the temperature to 212° F?
If you have a simplex single acting reciprocating pump 26.7 gpm
making 150 strokes/minute, with a 7" diameter cylinder,
a 9" stroke and operating with 95% volumetric
efficiency, what is the capacity of this pump?
Answer B
144 BTU's
Answer C
180 BTU's
Answer D
970 BTU's
53.4 gpm
80.1 gpm
106.8 gpm
the shank will loosen reverse rotation will
in the tap wrench
make the hole
oversize
441 gpm
95 gpm
9.5 tons
While reaming a hole, the reamer should not be turned
backwards if the hole has not been fully reamed
because __________.
If you have a simplex single acting reciprocating pump
making 120 strokes/minute, with a 6 diameter cylinder,
a 14" stroke and operating with 92% volumetric
efficiency, what is the capacity of this pump?
the cutting edges
may be damaged
378 gpm
turning in the wrong
direction will cause
chatter
189 gpm
If your vessel burns 8 tons of fuel per hour at 15 knots,
how many tons per hour will it burn at 18 knots?
9.6 tons
13.8 tons
When two refrigerated spaces in a refrigeration system
are served by a single compressor and condenser, yet
are maintained at different temperatures, a back
pressure regulating valve serves to provide
__________.
Which of the following conditions must be carried out
before the superheating of saturated vapor can occur?
a higher pressure in a higher pressure in a lower pressure in equal pressures in
the evaporator coil in the evaporator coil in the evaporator coil in the evaporator coils
of both boxes
the warmer box
the colder box
the warmer box
The vapor must be
removed from
contact with the
liquid from which it
was generated.
Which of the following practices is considered to be
Using oxygen as a
Routinely greasing or The storage of the
safe for the handling and use of compressed gas
substitute for
lubricating the valves cylinders in a well
cylinders?
compressed air for
on oxygen cylinders. ventilated
pneumatic tools.
compartment.
After a piece of pipe has been cut, a good shop practice make a taper for
make the taper
remove tool marks
to ream out the burr left in the pipe. This is done to
starting the threading required for pipe
which could interfere
__________.
die
threads
with flow
If you have a duplex double acting reciprocating pump 106 gpm
170 gpm
213 gpm
making 180 strokes/minute, with a 5" diameter cylinder,
a 8" stroke and operating with 87% volumetric
efficiency, what is the capacity of this pump?
An eroded globe valve disk can be repaired by
__________.
The evaporation rate The flow of liquid to
must be increased. the unfired pressure
vessel must be
increased.
taking a light cut in a sandblasting with
lathe
light weight grit
280
dressing the seat
with crocus cloth
11.5 tons
The operating
pressure must be
raised.
Cracking the valve
on a hydrogen
cylinder to clear dust
and dirt.
prevent the burr from
restricting flow in the
pipe
53 gpm
scraping with a
bastard file
Illustr
Book Num
11
3620
Ans
B
11
3621
A
11
3622
B
11
3623
C
11
3624
D
11
3625
A
11
3626
A
11
11
3627
3628
A
D
11
3630
D
11
3631
A
11
3632
D
Question
A graphite additive type grease is best suited for
__________.
I. low temperature applications
II. high temperature applications
If a block and tackle arrangement were rigged as shown
in figure "F" in the illustration, the amount of force "P"
required to hold the 508 pound load stationary would be
__________.
The proper tool used for cutting new external threads is
called a thread __________.
Which of the figures illustrated is known as an Allen
head set screw?
In a vapor compression type refrigeration cycle, the
refrigerant temperature decreases the most when
passing through the __________.
If you have a simplex single acting reciprocating pump
making 120 strokes/minute, with a 8 diameter cylinder,
a 13" stroke and operating with 92% volumetric
efficiency, what is the capacity of this pump?
I only
Answer A
Answer B
II only
Answer C
Both I and II
Answer D
Neither I nor II
127 lbs.
145 lbs.
169 lbs.
203 lbs.
GS-0110
chaser
die
broach
tap
figure B
figure C
figure F
figure G
evaporator
condenser receiver
compressor
expansion valve
156 gpm
625 gpm
312 gpm
507 gpm
upright with the
cylinder caps
screwed on
taper tap
horizontal with the
cylinder caps
screwed on
plug tap
upright with the
cylinder caps off
horizontal with the
cylinder caps off
bottoming tap
finishing tap
If you have a duplex single acting reciprocating pump
352 gpm
making 190 strokes/minute, with a 5" diameter cylinder,
a 11" stroke and operating with 90% volumetric
efficiency, what is the capacity of this pump?
80 gpm
320 gpm
160 gpm
When referring to greases, penetration number is
__________.
the temperature at
which a cone would
begin to penetrate
the sample
the temperature at
which the grease
would become
sufficiently fluid to fill
the voids of a
standard ball bearing
the depth to which a
cone would
penetrate a sample
of grease in 5
seconds
B
C
I
Oxygen and acetylene cylinders should always be
stored __________.
When internal threading for piping where the work
permits the tap to be run entirely through you can begin
and end the tapping of the hole by using a __________.
Illustr
how many seconds
was required for a
cone to penetrate the
sample
The working depth of the gear illustrated is represented A
by __________.
The purpose of the wearing ring used in the illustrated support the suction
pump is to __________.
end of the impeller
281
provide an
provide a
interference fit for the replaceable wear
impeller
surface for the shaft
GS-0080
GS-0111
provide a
replaceable wear
GS-0012
surface for the pump
housing
Book Num
Ans
11
3633
D
11
3634
D
11
3635
C
11
3637
C
11
3638
B
11
3639
B
11
3640
D
11
3641
D
11
3642
A
11
3643
B
11
3644
A
11
3645
A
Question
The function of seal cages, or lantern rings installed in
the centrifugal pump stuffing boxes, is to __________.
Answer A
cool the shaft
Answer B
Answer C
Answer D
lubricate the packing seal air from entering distribute the sealing
along the shaft
liquid within the
stuffing box
If the compressor is heard to knock while pumping
down the low side for repairs, this is an indication of
__________.
Internal pipe threads are cut with __________.
When using a hand die to cut threads on brass stock,
the threads can be dry cut or may be lubricated with
__________.
If you have a duplex single acting reciprocating pump
making 180 strokes/minute, with a 4" diameter cylinder,
a 12" stroke and operating with 80% volumetric
efficiency, what is the capacity of this pump?
worn piston rings
faulty bearings
air being introduced
to the system
foaming of the
crankcase oil
dies
graphite and oil
reamers
white lead
taps
lard oil
tap drills
kerosene
282 gpm
94 gpm
47 gpm
188 gpm
144 gpm
36 gpm
72 gpm
216 gpm
When pipe is properly screwed into a tapped hole, it will the pipe cannot be
give the correct fit when __________.
turned
all the threads are
covered
half of the threads
are covered
all but two or three
threads are covered
A centrifugal pump designed to handle a liquid with a
a semi-mechanical
temperature of 250° F or greater must be provided with seal
__________.
If you have a duplex single acting reciprocating pump
103 gpm
making 190 strokes/minute, with a 4" diameter cylinder,
a 13" stroke and operating with 77% volumetric
efficiency, what is the capacity of this pump?
helical grooved
wearing rings
self adjusting
packing
a liquid seal line
336 gpm
52 gpm
207 gpm
convert velocity to
pressure
B
limit hydraulic end
thrust
C
initiate flow
If you have a simplex single acting reciprocating pump
making 120 strokes/minute, with a 4 diameter cylinder,
a 12" stroke and operating with 92% volumetric
efficiency, what is the capacity of this pump?
The primary function of a centrifugal pump volute is to
__________.
In the refrigeration system shown in the illustration,
which of the valves indicated should be used to purge
the system?
A centrifugal pump with a double volute casing operated
at greater than design capacity, will __________.
develop a high
velocity liquid
A
Illustr
D
RA-0012
be less susceptible
to shaft deflection
than a similar pump
with a single volute
casing operated
under the same
conditions
282
be more susceptible
to shaft deflection
than a similar pump
with a single volute
casing operated
under the same
conditions
develop excessive
radial thrust and
resultant shaft
deflection
develop excessive
radial thrust and
resultant impeller
deflection
Book Num
11
11
11
11
3646
3647
3648
3649
Ans
C
C
C
B
11
3650
B
11
3651
D
11
3652
C
11
3653
D
11
3654
B
Question
Answer A
If you have a duplex single acting reciprocating pump
491 gpm
making 160 strokes/minute, with a 6" diameter cylinder,
a 13" stroke and operating with 89% volumetric
efficiency, what is the capacity of this pump?
In the illustration, a hole is shown in the block. The
shape of the hole is indicated as a __________.
Answer B
113 gpm
blind hole with a 3/4" tapered hole
depth
If you have a duplex single acting reciprocating pump
28 gpm
making 110 strokes/minute, with a 5" diameter cylinder,
a 4" stroke and operating with 95% volumetric
efficiency, what is the capacity of this pump?
36 gpm
90° apart
120° apart
180° apart
The pump packing
will fail causing
irreparable damage
to the pump shaft.
Pump capacity is
reduced and overall
efficiency will be
increased.
discharge volutes
wearing rings
pump suction
74 gpm
149 gpm
297 gpm
water pressure will
lower continually to
shut off head
water pressure will
tend to rise
continuously
liquid may overheat
and vaporize
Which of the following problems will occur when the
suction valve is throttled on a centrifugal pump not
designed to operate in this manner?
Pump efficiency is
The pump will
immediately overheat reduced and
and seize.
cavitation will be
induced.
283
1.5 inch diameter
fully bored hole
18 gpm
45° apart
If the flow of water from a centrifugal pump is allowed to relief valve will open
be stopped by closing the discharge valve while the
pump continues to run for an indefinite period, the
__________.
Which of the valves listed is normally closed when
Dehydrator inlet
charging the refrigeration system through the high side? valve
Answer D
453 gpm
hole laid out for
boring, but not
completed until
needed
71 gpm
When repacking a reciprocating pump with more than
four rings of packing, the packing is cut square,
installed with the ends abutted, and each succeeding
ring staggered with the butted ends __________.
shaft sleeves
If you heard a 'crackling' sound occurring within a
centrifugal pump, the most probable source of the noise
would be the __________.
If you have a duplex single acting reciprocating pump
273 gpm
making 120 strokes/minute, with a 6 diameter cylinder,
a 11" stroke and operating with 92% volumetric
efficiency, what is the capacity of this pump?
Answer C
227 gpm
Liquid line king valve Suction line valve
Thermal expansion
valve
Illustr
GS-0021
Book Num
11
11
11
11
11
11
11
3655
3656
3658
3660
3661
3662
3663
Ans
C
D
D
B
B
D
D
Question
Answer A
The illustrated device is in operation when __________. the output at "B" is
providing negative
feedback of the
manipulated variable
to the pressure
differential relay
Answer B
the output at "B" is
providing positive
feedback of the
manipulated variable
to the force balance
relay
Answer C
suction of the
transferred liquid
occurs at "G" and
discharge at "B"
Answer D
suction of the
transferred liquid
occurs at "B" and
discharge at "G"
If you have a duplex single acting reciprocating pump
110 gpm
making 140 strokes/minute, with a 5" diameter cylinder,
a 7" stroke and operating with 94% volumetric
efficiency, what is the capacity of this pump?
39 gpm
157 gpm
78 gpm
If you have a duplex single acting reciprocating pump
614 gpm
making 160 strokes/minute, with a 6" diameter cylinder,
a 14" stroke and operating with 96% volumetric
efficiency, what is the capacity of this pump?
132 gpm
526 gpm
263 gpm
As demand on the device shown in the illustration
fluctuates in the pressure range of 100 to 110 psi, the
output of the unit is controlled by __________.
complete shut down
until the lower
pressure limit is
reached causing it to
restart
the modulation of the
opening of a butterfly
valve located in the
air intake
proportional
change in control
pressure to modulate modulation of the
the discharge of
compressor speed
compressed air to
the atmosphere
Referring to the device shown in the illustration, the
coiled sensing lines "A" and "B", are used
simultaneously when the pilot is used __________.
to maintain a level in
a tank vented to the
atmosphere,
pressurized, or
operating under a
vacuum
to maintain a tank
level where there
exists a variable
vapor pressure
atmosphere
as a square root
extractor when
variable ratios are
present in the
processing system
to maintain a
constant flow
differential across a
turbine- driven,
centrifugal pump
If you have a duplex single acting reciprocating pump
making 130 strokes/minute, with a 4 diameter cylinder,
a 12" stroke and operating with 93% volumetric
efficiency, what is the capacity of this pump?
237 gpm
39 gpm
158 gpm
79 gpm
If a centrifugal pump is driven by a constant speed
prime mover and produces a flow rate less than the
designed specifications, the cause could be
__________.
suction absolute
excessive suction
pressure greatly
head pressure
exceeds
corresponding vapor
pressure of liquid
being pumped
284
pump packing gland worn wearing rings
misalignment
Illustr
GS-0061
GS-0119
GS-0052
Book Num
11
11
11
11
3664
3665
3666
3667
Ans
A
A
A
A
11
3668
A
11
3669
D
11
11
11
3670
3671
3672
A
B
B
Question
With a service gage manifold connected to a
refrigeration compressor as illustrated, which
arrangement of gage manifold valves and compressor
service valves will allow compressor suction and
discharge pressures to be read simultaneously?
Answer A
Valves "A" and "B"
closed, valves "C"
and "D" open just off
the back seats
Answer B
Valves "A" and "B"
open, valves "C" and
"D" closed on their
front seats
Answer C
Valves "A" and "B"
open and back
seated, valves "C"
and "D" back seated
Answer D
Illustr
Valves "A" and "B"
open, valves "C" and
"D" open in the
RA-0003
midposition
You suspect a problem with the centrifugal fire pump on
your ship, and begin to slowly close the discharge
valve. Your suspicion is confirmed when the
__________.
discharge valve is
closed off and there
is no change in the
discharge pressure
discharge valve is
80% closed and the
relief valve lifts
suction valve is
closed off, and the
discharge pressure
begins to decrease
suction valve is
closed off, yet the
relief valve does not
lift
If you have a duplex single acting reciprocating pump
301 gpm
making 160 strokes/minute, with a 7" diameter cylinder,
a 13" stroke and operating with 87% volumetric
efficiency, what is the capacity of this pump?
560 gpm
151 gpm
603 gpm
I only
The reset process control mode is also considered to
be the same as __________.
I. proportional speed floating control
II. derivative control
If you have a duplex single acting reciprocating pump
94 gpm
making 160 strokes/minute, with a 6" diameter cylinder,
a 5" stroke and operating with 96% volumetric
efficiency, what is the capacity of this pump?
II only
Both I and II
Neither I nor II
78 gpm
47 gpm
188 gpm
all of the above
The heat of compression is partially removed from
compressed air by __________.
In the operation of a proportional-plus-reset controller,
the proportional action __________.
I. aids the reset action during increasing error
transients
II. and the reset action are completely independent of
one another
intercoolers
aftercoolers
I only
II only
compressor water
jackets
Both I and II
The working components of a Bourdon tube pressure
gage are shown in the illustration. When pressure is
applied, the tube element will __________.
curl towards the
center
uncurl from the
center
expand only in a
linear direction
contract along its
linear axis
54 gpm
27 gpm
109 gpm
If you have a duplex single acting reciprocating pump
217 gpm
making 170 strokes/minute, with a 3" diameter cylinder,
a 12" stroke and operating with 87% volumetric
efficiency, what is the capacity of this pump?
285
Neither I nor II
GS-0114
Book Num
11
11
3673
3674
Ans
A
3675
D
11
3677
B
3678
B
11
3679
A
11
3680
D
11
3681
Answer A
78 gpm
Answer B
254 gpm
When one belt of a multiple V-belt drive requires
replacing, it will be necessary to __________.
ensure the proper
belt dressing is
applied
ensure the seasoned season the new belt
belts are reinstalled prior to installation
in their proper
sequence
D
11
11
Question
If you have a duplex single acting reciprocating pump
making 120 strokes/minute, with a 4 diameter cylinder,
a 13" stroke and operating with 92% volumetric
efficiency, what is the capacity of this pump?
Answer C
39 gpm
Answer D
156 gpm
Illustr
replace the entire
belt set
Intercooling of a multistage air compressor provides the condensing part of
advantages of reducing the work of compression on the the original water
succeeding stages, and __________.
vapor content
reducing the
maximum piston
loads
total capacity will be
If the intercooler of a low pressure air compressor
reduced
becomes fouled either internally or externally, the
__________.
43 gpm
If you have a duplex single acting reciprocating pump
making 140 strokes/minute, with a 6" diameter cylinder,
a 4" stroke and operating with 94% volumetric
efficiency, what is the capacity of this pump?
volumetric efficiency discharge pressure
will be decreased
will decrease
normal running time
will be decreased
64 gpm
129 gpm
As a general rule of thumb, the reservoir used in a
hydraulic system should have a capacity, when at the
normal level, approximately equal to __________.
two to three times
the normal flow rate
through the system
the flow rate through ten times the flow
the system
rate through the
system
the pump gpm
Hydraulic system reservoirs should be maintained at
recommended normal levels to reduce __________.
condensation on
inside walls
heat retention of
working fluid
frequency of fluid
changeover
all of the above
The approximate quantity of hydraulic oil available to
the system can be determined by __________.
removing "G" and
measuring the level
in the sump
observing the color
change of "J"
removing "D" and
measuring the height
of the remaining
liquid
removing the cap
from "A" and
measuring the height GS-0118
of the hydraulic oil
If you have a simplex single acting reciprocating pump 519 gpm
making 170 strokes/minute, with a 6" diameter cylinder,
a 14" stroke and operating with 89% volumetric
efficiency, what is the capacity of this pump?
130 gpm
259 gpm
605 gpm
provide storage for
compressed
cryogenic gases
E
act as a cyclonic oil
separator
B
11
3682
B
11
3683
B
One of the functions of the component labeled "E",
shown in the illustration, is to __________.
act solely as a heat
exchanger
act as a lube oil
sump
C
3684
B
The refrigeration system valve illustrated has a 'back
seat', indicated by the part labeled __________.
B
11
increasing the
all of the above
volumetric efficiency
32 gpm
GS-0119
G
RA-0008
286
Book Num
11
11
3685
3686
Ans
B
C
Question
If you have a duplex single acting reciprocating pump
making 120 strokes/minute, with a 6 diameter cylinder,
a 14" stroke and operating with 92% volumetric
efficiency, what is the capacity of this pump?
If you have a duplex single acting reciprocating pump
229 gpm
making 160 strokes/minute, with a 4" diameter cylinder,
a 11" stroke and operating with 87% volumetric
efficiency, what is the capacity of this pump?
The volumetric efficiency of a reciprocating air
compressor, is the ratio of the __________.
11
11
3687
3688
D
C
3689
A
The position of the controlling diaphragm "E", shown in
the illustration of the spring-loaded reducing valve, is
determined by the __________.
11
11
11
3690
3691
3692
A
A
D
Answer B
189 gpm
Answer C
95 gpm
Answer D
378 gpm
42 gpm
83 gpm
167 gpm
air indicated
horsepower from
indicator cards to the
brake horsepower
input
actual amount of air
discharged by the
compressor, to the
theoretical volume
swept by the
movement of the
compressor piston
207 gpm
141 gpm
adiabatic work of
work of isothermal
compression to the compression to the
indicated horsepower brake horsepower of
the motor
236 gpm
If you have a duplex single acting reciprocating pump
making 160 strokes/minute, with a 7" diameter cylinder,
a 8" stroke and operating with 97% volumetric
efficiency, what is the capacity of this pump?
The trap illustrated operates as a __________.
11
Answer A
441 gpm
103 gpm
Illustr
thermostatic bellows thermodynamic
type steam trap
bellows type steam
trap
thermodynamic float
thermostatic bimetallic bellows type type steam trap type
steam trap
steam trap
downward force of
the adjusting spring
"F" and the upward
force of the reduced
steam pressure
acting on diaphragm
"E"
adjusting screw "G"
force exerted on the
adjusting spring "F"
and the auxiliary
valve "D" only
amount of high
pressure steam
admitted beneath the
diaphragm "E" by the
auxiliary valve "D"
equalizing pressures
exerted on auxiliary
valve "D" by high
pressure steam and
GS-0044
reduced pressure
steam flow
II only
Both I and II
Neither I and II
45 gpm
79 gpm
23 gpm
In a typical hydraulic system, return lines to the
I only
reservoir are terminated below the normal oil level to
prevent __________.
I. foaming of the oil
II. condensation of warm oil vapors upon return
If you have a simplex single acting reciprocating pump 91 gpm
making 140 strokes/minute, with a 4" diameter cylinder,
a 7" stroke and operating with 85% volumetric
efficiency, what is the capacity of this pump?
287
GS-0005
Book Num
11
11
3693
3694
Ans
C
C
11
3695
B
11
3696
D
11
11
11
11
11
3697
3698
3699
3700
3701
A
C
A
B
A
Question
The valve shown in the illustration is typically used for
temperature control of a liquid being heated. Which of
the following changes to this unit would be useful in
converting the valve for use in controlling the
temperature of a cooling system?
In an atmosphere of 100% relative humidity, the wet
bulb thermometer would register a temperature
__________.
Answer A
Answer B
Change out parts "B" Remove parts "D"
and "J".
and "I".
above the dry bulb
temperature
below the dry bulb
temperature
the same as the dry
bulb temperature
above the dry bulb
temperature, but
below the saturation
temperature
In a typical hydraulic system, return lines to the
reservoir are __________.
I. terminated at or just above the normal level
II. placed as far from the pump suction as possible
I only
II only
Both I and II
Neither I and II
pressure on the arc
DC
indicated spring
tension
resiliency of the tube
material
GS-0114
II only
Both I and II
Neither I nor II
If you have a duplex single acting reciprocating pump
507 gpm
making 120 strokes/minute, with a 8-inch diameter
cylinder, a 13" stroke and operating with 92%
volumetric efficiency, what is the capacity of this pump?
156 gpm
312 gpm
625 gpm
The characteristic of 'offset' is inherent with which mode I only
of control?
I. proportional control
II. reset control
In the operation of a proportional-plus-reset controller, I only
the proportional action __________.
I. and the reset action are completely independent of
one another
II. opposes reset action during decreasing error
transients
II only
Both I and II
Neither I nor II
II only
Both I and II
Neither I nor II
A pneumercator measures the liquid level in a tank by
sensing __________.
I. head pressure
II. liquid density
II only
both I and II
neither I nor II
pressure on the arc
When pressure is released from a Bourdon tube-type
pressure gage, it will begin to recoil. The reason for this AB
action is due to the __________.
I only
The mandatory operating characteristic of a pure
amplifier is the __________.
I. form of the input and output energy must be the
same
II. ratio of the output change to input change must be a
value greater than 1 (one)
I only
288
Answer C
Answer D
Exchange part "L" for Exchange part "G"
one that is upward
for a heavier force.
seated.
Illustr
GS-0043
Book Num
11
11
11
11
11
3702
3703
3704
3705
3706
Ans
D
C
A
C
A
11
3708
C
11
3709
D
11
3711
D
11
3712
D
Question
Answer A
If you have a duplex single acting reciprocating pump
109 gpm
making 140 strokes/minute, with a 3" diameter cylinder,
a 9" stroke and operating with 94% volumetric
efficiency, what is the capacity of this pump?
Answer B
18 gpm
Answer C
72 gpm
Answer D
36 gpm
In the operation of a proportional-plus-reset controller,
the proportional action __________.
I. opposes the reset action during decreasing error
transients
II. aids the reset action during increasing error
transients
I only
II only
Both I and II
Neither I nor II
Which of the methods listed is most frequently used to
control evaporator refrigerant flow rate in a shipboard
refrigeration system?
Direct expansion
through a TXV with
constant superheat
Indirect expansion
with constant
superheat
Low side float control High side float
control
II only
Both I and II
Neither I nor II
68 gpm
34 gpm
57 gpm
If you have a simplex single acting reciprocating pump 94 gpm
making 190 strokes/minute, with a 3" diameter cylinder,
a 9" stroke and operating with 90% volumetric
efficiency, what is the capacity of this pump?
47 gpm
24 gpm
141 gpm
A compound Bourdon tube type pressure gage is
temperature and
capable of measuring __________.
pressure
If you have a duplex single acting reciprocating pump
216 gpm
making 120 strokes/minute, with a 4-inch diameter
cylinder, a 12" stroke and operating with 92%
volumetric efficiency, what is the capacity of this pump?
wet bulb and dry bulb humidity and
temperatures
temperature
36 gpm
144 gpm
The illustrated device is normally used to __________.
control the flow rate
of liquid being
discharged to the
tank
Reset control is considered to be the same as
I only
__________.
I. proportional speed floating control
II. integral control
If you have a simplex single acting reciprocating pump 17 gpm
making 250 strokes/minute, with a 3" diameter cylinder,
a 5" stroke and operating with 89% volumetric
efficiency, what is the capacity of this pump?
control the flow rate
of liquid being
removed from the
tank
289
Illustr
pressure and
vacuum
72 gpm
regulate the pressure provide a remote
of the liquid being
reading of the liquid
stored in the tank
stored in the tank
GS-0066
Book Num
11
3713
Ans
B
11
3714
D
11
3715
A
11
11
3716
3717
Question
In order for the hydraulic system to operate with fewer
contaminants from the system's operating fluid, the
illustrated device may __________.
Answer A
be increased in
height with all other
dimensions
remaining the same
Answer B
have additional
baffles installed
Answer C
have the horizontal
submerged section
of the suction line
lengthened
Answer D
be increased in
length and have the
width narrowed
When the sensing bulb of a thermostatic expansion
valve is charged with a fluid different from the charge
used in the system, it is said to be __________.
blended charged
Energy imparted to the hydraulic fluid in an operating
hydraulic system is stored in the __________.
straight charged
mixed charged
cross charged
accumulator
actuator
ram
reservoir
The baffle plates installed in the oil reservoir of a
hydraulic system serve to __________.
reduce fluid
turbulence at the
pump suction
minimizes the
chance of return line
contamination
deposits from
entering the pump
suction
all of the above
minimizes the
probability of air
being drawn into the
pump suction
In order for the hydraulic pump installed in a constant
flow system to maintain adequate flow, the pump
suction should __________.
be taken directly off
the reservoir bottom
without regard to
filters or strainers
be arranged to
develop a maximum
vacuum of
approximately 10" of
mercury
be arranged to
develop the
theoretically
maximum attainable
vacuum
be provided with
three to five 1/2 inch
holes in the vertical,
suction line to
prevent pump
starvation should the
strainer become
fouled
If you have a duplex double acting reciprocating pump 105 gpm
making 140 strokes/minute, with a 3" diameter cylinder,
a 13" stroke and operating with 94% volumetric
efficiency, what is the capacity of this pump?
52 gpm
227 gpm
26 gpm
The instrument used to indicate the level of a fluid in a fluid meter
tank is called a __________.
If you have a simplex single acting reciprocating pump 123 gpm
making 210 strokes/minute, with a 4" diameter cylinder,
a 7" stroke and operating with 77% volumetric
efficiency, what is the capacity of this pump?
calorimeter
viscosimeter
pneumercator
31 gpm
62 gpm
108 gpm
center of the hose
sharp bend formed at 90° bend as required
the left
of the installation
GS-0063
D
B
11
3718
A
11
3719
D
11
3720
B
11
3721
B
Figure "C" in the illustration, is an improperly installed
right hand fitting
hose, with the restriction developed at the __________. being small than
required
290
Illustr
GS-0118
Book Num
11
3722
Ans
D
11
3723
A
11
3724
A
11
3725
A
11
3726
B
11
3727
B
11
3728
D
11
3729
C
11
3730
B
11
3731
A
Question
Answer A
If you have a simplex single acting reciprocating pump 150 gpm
making 250 strokes/minute, with a 4" diameter cylinder,
a 7" stroke and operating with 79% volumetric
efficiency, what is the capacity of this pump?
Answer B
75 gpm
Answer C
132 gpm
Answer D
38 gpm
A hydraulic accumulator, used in a hydraulic system
aboard a MODU, is designed to __________.
act as the main fluid
reservoir
provide the only
means of
overpressure relief
front seat
seal cap
act as the singular
source of fluid
replenishment to a
system
normal discharge
273 gpm
149 gpm
273 gpm
451 gpm
526 gpm
113 gpm
ram
accumulator
piping
pump
store fluid until
required by the
system
Unloading valve
provide a place for
contaminants to
settle out
Detented position
valve
Sequencing valve
all of the above
Counterbalance
valve
three-position valve
provide a place for
air to separate out of
the fluid
Counterbalance
valve
Offset, two position
valve
sequencing valve
Unloading valve
unloading valve
counterbalance valve
93 gpm
302 gpm
186 gpm
47 gpm
store fluid under
pressure
Regarding the refrigeration valve illustrated, part "C" is back seat
the __________.
If you have a duplex single acting reciprocating pump
149 gpm
making 120 strokes/minute, with a 6" diameter cylinder,
a 11" stroke and operating with 92% volumetric
efficiency, what is the capacity of this pump?
If you have a duplex double acting reciprocating pump 226 gpm
making 140 strokes/minute, with a 6" diameter cylinder,
a 14" stroke and operating with 94% volumetric
efficiency, what is the capacity of this pump?
The component used in a hydraulic system to store
potential energy in the form of hydraulic fluid under
pressure, is the __________.
A reservoir is used in a hydraulic system to
__________.
Which of the devices listed is considered to be a
hydraulic system directional control valve?
Which of the devices listed would be considered a
hydraulic system directional control valve?
Which of the devices listed would be considered a
hydraulic system directional control valve?
If you have a duplex double acting reciprocating pump
making 140 strokes/minute, with a 4" diameter cylinder,
a 13" stroke and operating with 94% volumetric
efficiency, what is the capacity of this pump?
RA-0008
Sequencing valve
11
3732
C
C
directional control
valve
regenative valve
3733
A valve installed in a hydraulic system to manipulate the relief valve
reversal of fluid flow, is called a __________.
reservoir valve
11
J
K
3734
D
Which of the lettered components shown in the
illustration indicates a thermostatic control switch?
I
11
H
Illustr
RA-0005
291
Book Num
11
11
3735
3737
Ans
C
B
11
3738
A
11
3739
D
11
3740
11
3741
11
3742
D
D
The device shown in the illustration is typically called
a/an __________.
three-position,
directional control
valve
31 gpm
B
A
11
3744
D
11
3746
If you have a duplex double acting reciprocating pump 205 gpm
making 190 strokes/minute, with a 6" diameter cylinder,
a 5" stroke and operating with 88% volumetric
efficiency, what is the capacity of this pump?
Two-position valve
3743
3745
Answer B
reservoir valve
Which of the valves listed is not considered to be a
hydraulic system directional control valve?
If the operator releases the handle of the illustrated
device while the system output is in motion, the valve
will __________.
11
11
Question
Answer A
A valve installed in a hydraulic system to control the
relief valve
reversal of fluid flow is called a __________.
If you have a duplex single acting reciprocating pump
150 gpm
making 120 strokes/minute, with a 4" diameter cylinder,
a 10" stroke and operating with 92% volumetric
efficiency, what is the capacity of this pump?
A
D
60 gpm
Answer C
directional control
valve
30 gpm
120 gpm
102 gpm
85 gpm
51 gpm
Three-position valve Detented-position
valve
drift to an extreme
return to its centered
drift to an extreme
position and the
position and the
position and the
output will increase
output speed will
output speed will
to maximum
increase to maximum drop to zero
Answer D
power valve
Illustr
Counterbalance
valve
return to its centered
position and the
output speed will
GS-0032
drop to zero
variable-position,
directional control
valve
62 gpm
infinite-position,
directional control
valve
52 gpm
two-position,
directional control
valve
15 gpm
Regarding the device shown in the illustration, if the
valve will remain in
operator releases the handle while the system output is position with the
in motion, the __________.
output remaining
unchanged
valve will remain in
position with the
system output
steadily decreasing
valve will drift to the
center position
stopping any further
output of the system
valve will drift to the
opposite position
changing the
GS-0035
direction of output
motion of the system
Which of the listed types of refrigeration compressors
can be designed with short large diameter suction
lines?
The device shown in the illustrated is known as a/an
__________.
Rotary
Screw
Centrifugal
If you have a duplex double acting reciprocating pump
making 270 strokes/minute, with a 3" diameter cylinder,
a 5" stroke and operating with 75% volumetric
efficiency, what is the capacity of this pump?
Reciprocating
three-position,
four-position, spring- rotary, directional
detented, directional centered, directional control valve
control valve
control valve
If you have a duplex single acting reciprocating pump
55 gpm
making 100 strokes/minute, with a 4" diameter cylinder,
a 7" stroke and operating with 82% volumetric
efficiency, what is the capacity of this pump?
292
16 gpm
62 gpm
offset solenoid,
directional control
valve
31 gpm
GS-0024
GS-0035
Book Num
Ans
11
3747
D
11
3748
A
11
3749
B
11
11
11
3750
3751
3752
A
C
A
11
3753
B
11
3754
D
11
3755
B
11
3756
A
Question
A hydraulic fluid flow control circuit, controlling linear
actuator speed, with the pump operating below
maximum operating pressure is known as the
__________.
A hydraulic system flow-control circuit is shown in the
illustration and is known as a __________.
A hydraulic system flow-control circuit is shown in the
illustration and is known as a __________.
A hydraulic fluid flow control circuit, controlling linear
actuator speed during extension, with the pump
operating at system pressure, is known as a
__________.
If you have a simplex single acting reciprocating pump
making 250 strokes/minute, with a 4" diameter cylinder,
a 6" stroke and operating with 92% volumetric
efficiency, what is the capacity of this pump?
Answer A
metered-in circuit
Answer B
metered-out circuit
Answer C
bleed-in circuit
Answer D
bleed-off circuit
metered-in circuit
metered-out circuit
bleed-off circuit
bleed-in circuit
metered-in circuit
metered-out circuit
bleed-in circuit
bleed-off circuit
metered-in circuit
metered-out circuit
bleed-off circuit
bleed-in circuit
114 gpm
57 gpm
38 gpm
86 gpm
542 gpm
271 gpm
426 gpm
metered-in circuit
metered-out circuit
bleed-in circuit
bleed-off circuit
noncondensable
gases and vapors
The oil pressure will
equalize at both ends
of the actuator and
the pump will
discharge through
the reducing valve to
the sump.
oil from the
refrigerant
The load on the
actuator may cause
a difference in
pressure to exist
between the rod and
cap end, and oil
discharging to the
sump across the
relief valve with the
pump operating.
refrigerant from the
oil
A pressure
differential will exist
between the two
ends of the actuator,
with pump discharge
lower than normal
due to flow across
the unloading valve.
moisture from the
system
Oil pressure to both
sides of the actuator
will be equal as the
pump discharge flow
is directed across the
relief valve.
GS-0105
91 gpm
128 gpm
46 gpm
If you have a simplex single acting reciprocating pump 136 gpm
making 170 strokes/minute, with a 7" diameter cylinder,
a 11" stroke and operating with 87% volumetric
efficiency, what is the capacity of this pump?
A hydraulic fluid flow control circuit, used to control
linear actuator speed during retraction, with the pump
operating at above maximum pressure, is known as a
__________.
A dehydrator installed in a refrigeration system is used
to remove __________.
Which of the statements is true concerning the
illustrated hydraulic circuit when the directional control
valve is centered?
If you have a duplex double acting reciprocating pump 183 gpm
making 160 strokes/minute, with a 5" diameter cylinder,
a 7" stroke and operating with 96% volumetric
efficiency, what is the capacity of this pump?
293
Illustr
GS-0105
GS-0106
Book Num
11
3757
Ans
D
11
3758
C
11
3759
C
11
3760
B
11
3761
C
11
3762
D
11
3763
A
11
3764
D
11
11
11
3765
3766
3767
B
B
D
Question
Answer A
Directional control valves used in hydraulic systems
manually
may be positioned __________.
If you have a duplex single acting reciprocating pump
312 gpm
making 180 strokes/minute, with a 6" diameter cylinder,
a 10" stroke and operating with 85% volumetric
efficiency, what is the capacity of this pump?
Answer B
mechanically
Answer C
electrically
Answer D
all of the above
94 gpm
187 gpm
375 gpm
Valve "D" indicated in the illustration is referred to as
a/an __________.
Which of the listed pressure-control valves would be
used in a hydraulic system to temporarily divert some,
or all of the pump discharge until the additional flow was
required?
The determining factor for the strength of a flexible
rubber hydraulic hose is the __________.
If you have a duplex single acting reciprocating pump
making 190 strokes/minute, with a 6" diameter cylinder,
a 5" stroke and operating with 88% volumetric
efficiency, what is the capacity of this pump?
relief valve
sequence valve
unloading valve
Which of the following statements will be true if the
position of the manual control lever, shown in the
illustration, remains unchanged after the pump is placed
on stroke?
Although oil will leak
past part 'B,' the
amount of pump
stroke will be
maintained until the
control handle
position is changed.
counterbalance valve unloading valve
external cover
counter balance
valve
compound, pressure- sequence valve
relief valve
Illustr
GS-0049
synthetic rubber
inner tube
51 gpm
braided layer
Teflon sleeve
205 gpm
102 gpm
Regardless of the
control handle
position, the pump
will gradually return
to neutral stroke.
Regardless of the
control handle
position, the pump
will gradually move to
full stroke.
Although the control
handle position was
set, the pump
displacement will
fluctuate from zero to
GS-0039
maximum flow rate
until the handle is
placed in its neutral
position.
Which of the listed materials can be used as a
Silica gel
Activated alumina
desiccant in a refrigeration system?
A bent axis, variable stroke, axial piston pump produces piston diameters are length of stroke is
a greater capacity than a comparable tilting box-type
smaller
greater
axial piston pump, because the __________.
Anhydrous calcium
sulfate
RPM is doubled
All of the above
If you have a duplex single acting reciprocating pump
90 gpm
making 180 strokes/minute, with a 6" diameter cylinder,
a 5" stroke and operating with 98% volumetric
efficiency, what is the capacity of this pump?
108 gpm
54 gpm
216 gpm
Both the direction of flow and fluid flow rate of a variable pump shaft and
displacement radial piston pump are determined by the central valve
relative positions of the __________.
pump shaft and
horizontal ports
floating ring and
pump shaft
floating ring and
cylinder body
85 gpm
294
discharge/return line
diameter are
arranged differently
Book Num
11
3768
Ans
D
11
3770
D
11
3771
D
11
3772
A
11
11
11
11
11
3773
3774
3775
3776
3777
B
B
A
C
C
Question
If you have a simplex single acting reciprocating pump
making 170 strokes/minute, with a 5 diameter cylinder,
a 4" stroke and operating with 92% volumetric
efficiency, what is the capacity of this pump?
Answer A
101 gpm
Answer B
56 gpm
Answer C
42 gpm
Answer D
27 gpm
If you have a simplex single acting reciprocating pump 521 gpm
making 190 strokes/minute, with a 6" diameter cylinder,
a 14" stroke and operating with 80% volumetric
efficiency, what is the capacity of this pump?
260 gpm
608 gpm
130 gpm
With an increase in temperature, the volume of
hydraulic fluid __________.
remains the same
remains constant if
pressure decreases
increases
viscosity will
decrease
volume will increase floc point will
increase
low oil level in the
reservoir
low fluid viscosity
existing only around
the shaft seal
high oil level in the
sump
deliver cooled air to
all areas of the
compartment
prevent air from
being cooled below
the dew point
eliminate all noxious
odors in the
compartment
insufficient external
pump slippage
fluctuating pump
discharge pressure
in response to
normal load
variations
75 gpm
150 gpm
from 35 degrees on
one side to 30
degrees on the other
side in no more than
28 seconds
from 15 degrees on
one side to 15
degrees to the other
side in 30 seconds at
7 knots or one-half
the maximum service
speed
contracts
When normal operating pressure is applied to the
viscosity will increase
hydraulic oil in a high-pressure system, the oil
__________.
Overheating of the hydraulic fluid in an electro-hydraulic overload of the pump
anchor windlass, may indicate pump cavitation caused motor
by __________.
Cold storage compartments used for frozen or chilled
foods, may be equipped with medium velocity air
coolers to establish rapid convection and to
__________.
Overheating of the oil in a hydraulic system can be
caused by __________.
prevent shrinkage
and drying of stored
foods
continuous leakage an increase in the
through the pressure number of the
relief valve
hydraulic fluid film
layers
If you have a duplex single acting reciprocating pump
50 gpm
making 160 strokes/minute, with a 6" diameter cylinder,
a 4" stroke and operating with 96% volumetric
efficiency, what is the capacity of this pump?
38 gpm
Coast Guard Regulations require that OSV's under 100 by a required
by design at one-half
GT must have a steering system that is capable of
auxiliary steering
astern speed without
moving the rudder __________.
system under
damage.
emergency
conditions when
duplicated main
steering power
systems are provided
295
Illustr
Book Num
11
11
11
3778
3779
3781
Ans
A
B
A
11
3782
D
11
3783
C
11
11
3784
3785
C
C
11
3786
D
11
3787
A
Question
Answer A
If you have a duplex double acting reciprocating pump 519 gpm
making 170 strokes/minute, with a 6" diameter cylinder,
a 14" stroke and operating with 89% volumetric
efficiency, what is the capacity of this pump?
Answer B
259 gpm
Answer C
605 gpm
Answer D
130 gpm
In order to properly regulate the high side pressure of a I
refrigerating system, using the device shown in the
illustration, adjustment should be carried out by rotating
the component labeled as __________.
M
N
O
If you have a simplex single acting reciprocating pump 22 gpm
making 130 strokes/minute, with a 4" diameter cylinder,
a 7" stroke and operating with 90% volumetric
efficiency, what is the capacity of this pump?
89 gpm
45 gpm
78 gpm
"M" and rotate it
counter clockwise
(down)
Illustr
RA-0015
In order to reduce the operating head pressure of a
refrigerating system using the device shown in the
illustration, you should use component __________.
"I" and rotate it
counter clockwise
(out)
"O" and rotate it
clockwise (up)
"N" and rotate it
counter clockwise
(up)
In order to raise the operating head pressure of a
refrigerating system using the device shown in the
illustration, component __________.
To prevent motor overload during start-up of a
hermetically sealed centrifugal refrigeration system, the
compressor suction gas variable inlet guide vanes
remain __________.
"O" should be rotated
counter clockwise
(down)
closed until the motor
is connected across
the line at full voltage
and current drawn is
up to full load current
"N" should be rotated
counter clockwise
(down)
opened until the
motor is connected
across the line at full
voltage and current
drawn is below full
load current
"M" should be rotated "I" should be rotated
clockwise (up)
clockwise (up)
In a refrigeration system, if the cooling water to the
condenser fails, the __________.
box temperature
solenoid valve will
close
expansion valve will
close due to high
superheat
compressor will
king valve will open
shutdown on the high
discharge pressure
cutout switch
31 gpm
129 gpm
If you have a duplex single acting reciprocating pump
124 gpm
making 190 strokes/minute, with a 4" diameter cylinder,
a 8" stroke and operating with 75% volumetric
efficiency, what is the capacity of this pump?
closed until the motor
is connected across
the line at full voltage
and current drawn is
below full load
current
The item, labeled "F" shown in the illustration, will begin the total force above the working pressure the spring force
to lift to a higher position if __________.
"H" is reduced
in "N" is decreased controlled by "I" is
reduced
296
RA-0015
RA-0015
opened until the
motor is connected
across the line at full
voltage and current
drawn is up to full
load current
62 gpm
component "C"
becomes fully seated RA-0015
Book Num
Ans
11
3788
B
11
3789
A
11
3790
C
11
3791
D
11
3792
A
11
3793
B
11
3794
B
11
11
3795
3796
D
A
Question
Answer A
If you have a duplex double acting reciprocating pump 62 gpm
making 190 strokes/minute, with a 4" diameter cylinder,
a 8" stroke and operating with 75% volumetric
efficiency, what is the capacity of this pump?
If a hydraulic pump is overheating, the cause may be
__________.
If you have a duplex single acting reciprocating pump
making 190 strokes/minute, with a 5" diameter cylinder,
a 12" stroke and operation with 75% volumetric
efficiency, what is the capacity of this pump?
Capacity control of a centrifugal refrigeration
compressor can be accomplished by __________.
Answer B
124 gpm
Answer C
170 gpm
Answer D
31 gpm
excessive internal
low discharge
slippage in the pump pressure and fluid
flow
349 gpm
73 gpm
excessive fluid level
in the hydraulic
reservoir
145 gpm
operation of the
pump at 100%
efficiency
291 gpm
varying the speed of varying the suction
the compressor
pressure
varying condenser
water flow rate
all of the above
the highest normal
pressure
of no consequence
as the compressor
lube oil pressure is
not used in the
operation of the
capacity unloading
system.
During the operation of a multi-box refrigeration system the lowest normal
using a capacity controlled compressor, only one box is pressure
actively being cooled. Under this operating condition,
the compressor lube oil pressure should be
__________.
in the midrange
pressure
If you have a simplex single acting reciprocating pump 139 gpm
making 160 strokes/minute, with a 5" diameter cylinder,
a 6" stroke and operating with 85% volumetric
efficiency, what is the capacity of this pump?
35 gpm
69 gpm
A solenoid valve is operated by magnetic action through suction pressure at
__________.
the compressor
an electrically
energized coil
superheat at the
a vacuum operated
evaporator outlet coil bellows
A refrigeration compressor is used in a multi-box
100%
refrigeration system, having six of its eight cylinders
controlled for variable load conditions. If all of the reefer
boxes are recently activated, what percentage of the
total number of compressor cylinders will be unloaded?
50%
25%
If you have a duplex single acting reciprocating pump
150 gpm
making 160 strokes/minute, with a 6" diameter cylinder,
a 9" stroke and operating with 85% volumetric
efficiency, what is the capacity of this pump?
225 gpm
Illustr
RA-0013
83 gpm
0%
RA-0013
297
75 gpm
300 gpm
Book Num
11
11
3798
3799
Ans
C
A
Question
Answer A
If you have a duplex single acting reciprocating pump
251 gpm
making 190 strokes/minute, with a 3" diameter cylinder,
a 12" stroke and operating with 90% volumetric
efficiency, what is the capacity of this pump?
If it is necessary to increase the operating head
pressure of the refrigeration system using the device
shown in the illustration, component __________.
The function of the device shown in the illustration is to
control __________.
11
3800
B
11
3801
A
11
3802
D
The device shown in the illustration would normally be
associated with what engine room system?
11
11
11
11
3803
3804
3805
3806
B
B
D
C
When multiple refrigerated boxes are maintaining
individual temperatures and supplied by a single
refrigeration compressor, the individual box
temperatures are controlled by the __________.
A fluid power system is considered to be fail-safe if a
component failure will result in __________. (46 CFR)
Answer C
63 gpm
Answer D
126 gpm
Illustr
"A" should be turned "A" should be turned
to compress the
to relax the
spring
compression of the
spring
flow of refrigerant
high side pressure of
into the evaporator
a refrigeration
coils
system
"D" should be rotated "G" should be
to compress the
exchanged for a
RA-0014
enclosed bellows
larger cross-sectional
diameter
flow rate of
the amount of low
secondary refrigerant pressure gas
in a chilled water air entering the
conditioning system compressor suction RA-0015
Bilge pump priming
system.
Lube oil transfer
system.
Fuel oil transfer
system.
Hydraulic steering
system.
181 gpm
25 gpm
98 gpm
efficiency of the heat point of condensation
exchanger operation will be moved closer
will be increased
to the steam inlet of
the heat exchanger
point of condensation
will be moved closer
to the condensate
outlet of the heat
exchanger
steam pressure set
point will
automatically be
increased
suction valves
expansion valves
compressor speed
the guaranteed safe
and efficient
operation of the
system at all times
a slow and controlled
release of the
loading so as not to
endanger personnel
297 gpm
74 gpm
If you have a duplex double acting reciprocating pump 49 gpm
making 190 strokes/minute, with a 3" diameter cylinder,
a 11" stroke and operating with 77% volumetric
efficiency, what is the capacity of this pump?
If "E" is moved closer to the top of "B" as shown in the
illustration, the __________.
Answer B
31 gpm
solenoid valves
continuous operation a safety interlock
of the system
producing a
regulated shutdown
of the system
If you have a duplex double acting reciprocating pump 149 gpm
making 120 strokes/minute, with a 6" diameter cylinder,
a 11" stroke and operating with 92% volumetric
efficiency, what is the capacity of this pump?
298
273 gpm
GS-0075
GS-0002
Book Num
11
11
11
11
11
11
3807
3808
3809
3810
3812
3813
Ans
Question
The devices labeled "C" in the illustration, are used as
__________.
Answer B
mud by-pass valves
that protects a pump
that fails when both
pumps are on line
Answer C
Answer D
pressure relief valves a sealing water
to protect the pump supply to the pump
in the event of a clog lantern gland
in the discharge line
If you have a duplex double acting reciprocating pump 301 gpm
making 160 strokes/minute, with a 7" diameter cylinder,
a 13" stroke and operating with 87% volumetric
efficiency, what is the capacity of this pump?
560 gpm
603 gpm
151 gpm
If you have a simplex single acting reciprocating pump 42 gpm
making 110 strokes/minute, with a 5" diameter cylinder,
a 10" stroke and operating with 90% volumetric
efficiency, what is the capacity of this pump?
84 gpm
126 gpm
168 gpm
If you have a duplex single acting reciprocating pump
425 gpm
making 170 strokes/minute, with a 5" diameter cylinder,
a 13" stroke and operating with 87% volumetric
efficiency, what is the capacity of this pump?
163 gpm
82 gpm
327 gpm
If you have a duplex single acting reciprocating pump
314 gpm
making 180 strokes/minute, with a 4" diameter cylinder,
a 12" stroke and operating with 89% volumetric
efficiency, what is the capacity of this pump?
52 gpm
209 gpm
105 gpm
If you have a duplex double acting reciprocating pump 164 gpm
making 190 strokes/minute, with a 6" diameter cylinder,
a 4" stroke and operating with 88% volumetric
efficiency, what is the capacity of this pump?
82 gpm
55 gpm
41 gpm
C
C
A
B
D
A
11
3814
A
11
3815
C
Answer A
pressure regulating
valves to insure
excessive pressure
does not damage the
manifold nozzles
Illustr
GS-0162
Which of the following statements best describes the
operation of the refrigeration valve shown in the
illustration?
Turning the
The sensor bulb
adjustment screw
detects changes in
counterclockwise, as box temperature.
viewed from the
bottom, results in an
increase in
evaporator superheat
setting.
The temperature of
the refrigerant
passing through the
device is colder at
the inlet than at the
outlet.
Refrigerant pressure
acting through the
external equalizer
connection is always
RA-0007
acting to close the
valve.
Which segment of the graph shown in the illustration
represents the latent heat of fusion?
line 4
Line 2
Line 1
Line 3
299
SG-0001
Book Num
Ans
11
3816
A
11
3817
D
11
3818
D
11
3819
D
Question
Answer A
If you have a duplex single acting reciprocating pump
34 gpm
making 250 strokes/minute, with a 3" diameter cylinder,
a 5" stroke and operating with 89% volumetric
efficiency, what is the capacity of this pump?
Answer B
57 gpm
Answer C
17 gpm
Answer D
68 gpm
The part labeled "C" of the illustrated bearing is called
thrust ring
the __________.
burning temperature
The lowest temperature at which fuel oil gives off
sufficient vapor to burn continuously when ignited is
defined as the __________.
If you have a duplex double acting reciprocating pump 72 gpm
making 120 strokes/minute, with a 4" diameter cylinder,
a 12" stroke and operating with 92% volumetric
efficiency, what is the capacity of this pump?
outer race
inner race
cage
auto ignition
temperature
flash point
fire point
216 gpm
36 gpm
144 gpm
lowest temperature
at which the fuel oil
will give off enough
vapor to continue to
burn once ignited
temperature the fuel temperature at which
oil must be heated to the fuel oil will burn
in a boiler furnace
for proper
atomization
A micrometer scale reading is indicated as 0.349 inches Figure C
and is represented in the illustration by __________.
Figure A
Figure G
If you have a simplex single acting reciprocating pump 134 gpm
making 180 strokes/minute, with a 6" diameter cylinder,
a 14" stroke and operating with 87% volumetric
efficiency, what is the capacity of this pump?
537 gpm
The flash point of bunker fuel is defined as the
__________.
11
3820
A
11
3821
A
11
11
3822
3823
A
B
11
3825
D
11
3826
D
lowest temperature
at which the fuel oil
will give off enough
vapor to momentarily
flash into flame when
ignited
GS-0013
The lowest temperature at which fuel oil gives off
sufficient vapor to momentarily flash into flame when
ignited is defined as the __________.
prevent chill
shocking the
compressor suction
valves
burning temperature ignition temperature
increase the
circulation of liquid
refrigerant
300
MO-0001
Figure H
268 gpm
626 gpm
When a refrigeration compressor is in the 'off' cycle, the always be wide open continue to operate remain open until
always be completely
thermal expansion valve will_________.
when the
as if the system were evaporator pressure closed until the
compressor restarts in operation
equalizes, then close compressor restarts
until the compressor
restarts
Some 'hot gas' defrost systems reheat the refrigerant
just prior to its returning to the compressor to
__________.
Illustr
improve the
efficiency of the
expansion valve
reduce the damaging
effects of liquid
slugging
fire point
flash point
Book Num
11
11
3827
3828
Ans
B
A
11
3829
B
11
3830
C
11
3831
D
11
3832
D
11
3833
A
11
3834
D
11
11
11
3835
3836
3837
Question
If you have a duplex double acting reciprocating pump
making 270 strokes/minute with 4" diameter cylinder,
and a 7" stroke with 81% volumetric efficiency, what is
the capacity of this pump?
Answer B
167 gpm
Answer C
146 gpm
Answer D
42 gpm
If you have a duplex double acting reciprocating pump 542 gpm
making 170 strokes/minute, with a 7" diameter cylinder,
a 11" stroke and operating with 87% volumetric
efficiency, what is the capacity of this pump?
271 gpm
426 gpm
136 gpm
If you have a duplex single acting reciprocating pump
121 gpm
making 130 strokes/minute, with a 6" diameter cylinder,
a 7" stroke and operating with 93% volumetric
efficiency, what is the capacity of this pump?
104 gpm
52 gpm
207 gpm
The tendency of a flammable liquid to vaporize is
indicated by its __________.
When using a chisel, you should __________.
fire point
pour point
flash point
boiling point
wear gloves
hold the tool lightly
wear safety glasses
0.335 inch
The reading on the micrometer scale shown in figure
0.301 inch
"C" in the illustration is __________.
If you have a duplex single acting reciprocating pump
41 gpm
making 160 strokes/minute, with a 4" diameter cylinder,
a 5" stroke and operating with 95% volumetric
efficiency, what is the capacity of this pump?
0.310 inch
be certain it is a
nonsparking type
0.325 inch
52 gpm
21 gpm
83 gpm
The pressure in a low pressure refrigeration system
about to be opened for repair should be __________.
10 to 12 psig
4 to 7 psig
0 to 1 psig
25 inches of hg
vacuum
When adding oil to a refrigeration system, precautions
must be taken to ensure that __________.
the compressor
suction pressure is
not too high
all air is purged from the high pressure
the condenser is
the pump and
cutout switch is held completely shutdown
charging fittings
open to prevent
first
accidental starting
B
B
C
Answer A
83 gpm
If you have a duplex single acting reciprocating pump
132 gpm
making 250 strokes/minute, with a 4" diameter cylinder,
a 7" stroke and operating with 79% volumetric
efficiency, what is the capacity of this pump?
75 gpm
The normal operation of a refrigeration compressor
should be to cycle on __________.
in response to the
and off in response
high pressure cutout to the low pressure
switch and off in
cutout switch
response to the low
pressure cutout
switch
in response to the
low pressure cutout
switch and off in
response to the high
pressure cutout
switch
301
38 gpm
150 gpm
and off in response
to the high pressure
cutout switch
Illustr
GS-0081
Book Num
11
3838
Ans
B
11
3839
C
11
3840
A
11
11
3841
3842
C
D
11
3843
D
11
3844
C
11
3845
B
11
3846
C
11
3847
B
Question
Answer A
If you have a simplex single acting reciprocating pump 176 gpm
making 100 strokes/minute, with a 6" diameter cylinder,
a 8" stroke and operating with 90% volumetric
efficiency, what is the capacity of this pump?
Answer B
44 gpm
Answer C
88 gpm
Answer D
157 gpm
If you have a duplex single acting reciprocating pump
204 gpm
making 170 strokes/minute, with a 5" diameter cylinder,
a 9" stroke and operating with 87% volumetric
efficiency, what is the capacity of this pump?
57 gpm
113 gpm
226 gpm
The lathe tool shown as figure "T" in the illustration is
commonly known as a/an __________.
left-cut side-facing
tool
right-cut threading
tool
left-cut roughing tool
If a block and tackle arrangement were rigged as shown 83.33 lbs.
in figure "C" in the illustration, the amount of force "P"
required to hold the 250 pound load stationary would be
__________. (See illustration GS-0110)
104.16 lbs.
125.00 lbs.
250.00 lbs.
If you have a duplex double acting reciprocating pump 268 gpm
making 180 strokes/minute, with a 6" diameter cylinder,
a 14" stroke and operating with 87% volumetric
efficiency, what is the capacity of this pump?
626 gpm
134 gpm
537 gpm
If you have a duplex double acting reciprocating pump 68 gpm
making 230 strokes/minute, with a 4" diameter cylinder,
a 7" stroke and operating with 78% volumetric
efficiency, what is the capacity of this pump?
120 gpm
34 gpm
137 gpm
Loss of refrigerant during the purging process can be
kept to a minimum by __________.
purging through the
discharge service
valve
19 gpm
cracking the purge
valve briefly
closing the liquid line
king valve
9 gpm
38 gpm
If you have a simplex single acting reciprocating pump 80 gpm
making 170 strokes/minute, with a 3" diameter cylinder,
a 10" stroke and operating with 77% volumetric
efficiency, what is the capacity of this pump?
40 gpm
20 gpm
134 gpm
The lathe tool shown as figure "Q" in the illustration is
commonly known as a/an __________.
left-cut side-facing
tool
right-cut side-facing
tool
left-cut roughing tool
If you have a duplex single acting reciprocating pump
making 160 strokes/minute, with a 3" diameter cylinder,
a 4" stroke and operating with 97% volumetric
efficiency, what is the capacity of this pump?
right-cut roughing
tool
operating the
dehydrator
continuously
25 gpm
right-cut roughing
tool
302
Illustr
GS-0090
GS-0110
GS-0090
Book Num
11
3848
Ans
D
11
3849
D
11
3850
D
11
11
11
11
11
11
3851
3852
3853
3855
3856
3857
A
B
D
B
D
C
Question
Answer A
The reading indicated on the micrometer scale in the
Figure A
illustration is .4815 inches. Which illustration represents
this reading?
If you have a simplex single acting reciprocating pump 14 gpm
making 120 strokes/minute with 3" diameter cylinder,
and a 4" stroke with 95% volumetric efficiency, what is
the capacity of this pump?
The lathe tool shown as figure "S" in the illustration is
commonly known as a/an __________.
right-cut roughing
tool
Answer B
Figure B
Answer C
Figure C
Answer D
Figure D
GS-0081
28 gpm
19 gpm
7 gpm
left-cut threading tool right-cut side-facing
tool
left-cut roughing tool
If you turn the hand wheel clockwise of a spring-loaded, compress the
internal pilot, reducing valve, you will __________.
adjusting spring
against the
diaphragm
What can happen to oil based mud when contaminated Nothing, as salt
with salt water?
water is an ingredient
of oil based mud.
release spring
tension from the
diaphragm
increase steam
pressure to the
reducing valve
decrease spring
tension in the main
valve
Small amounts can
cause thickening of
the oil based fluid as
well as a reduction in
density.
Small amounts react
with gel particles in
the mud causing
them to flocculate.
The water will collect
at the bottom of the
tank and can not be
stripped overboard.
If you have a duplex double acting reciprocating pump 149 gpm
making 180 strokes/minute, with a 5" diameter cylinder,
a 13" stroke and operating with 75% volumetric
efficiency, what is the capacity of this pump?
388 gpm
75 gpm
298 gpm
If a block and tackle arrangement were rigged as shown 43 lbs.
in figure "F" in the illustration, the amount of force "P"
required to hold the 250 pound load stationary would be
__________. (See illustration GS-0110)
63 lbs.
83 lbs.
100 lbs.
If you have a duplex double acting reciprocating pump 34 gpm
making 250 strokes/minute, with a 3" diameter cylinder,
a 5" stroke and operating with 89% volumetric
efficiency, what is the capacity of this pump?
57 gpm
17 gpm
68 gpm
If you have a duplex single acting reciprocating pump
110 gpm
making 120 strokes/minute, with a 6" diameter cylinder,
a 7" stroke and operating with 92% volumetric
efficiency, what is the capacity of this pump?
47 gpm
95 gpm
189 gpm
303
Illustr
GS-0090
GS-0044
GS-0110
Book Num
11
3858
Ans
C
11
3859
A
11
3860
B
11
3861
C
11
3862
A
11
11
11
11
11
3863
3864
3866
3867
3868
C
A
D
B
D
Question
Answer A
If you have a duplex single acting reciprocating pump
54 gpm
making 170 strokes/minute, with a 6" diameter cylinder,
a 4" stroke and operating with 97% volumetric
efficiency, what is the capacity of this pump?
Answer B
40 gpm
Answer C
81 gpm
Answer D
161 gpm
If you have a simplex single acting reciprocating pump 113 gpm
making 140 strokes/minute, with a 6" diameter cylinder,
a 14" stroke and operating with 94% volumetric
efficiency, what is the capacity of this pump?
451 gpm
226 gpm
526 gpm
right hand rough
turning
can be removed by
passing hot vapors
through the coils
The lathe tool shown as figure "Q" in the illustration is
commonly used for __________.
Frost appearing on the evaporator coils of a multi-box
direct expansion refrigeration system __________.
cutting-off
left hand rough side
facing
is best removed by
will increase the
means of an ice pick refrigeration effect
If you have a duplex double acting reciprocating pump 147 gpm
making 170 strokes/minute, with a 5" diameter cylinder,
a 12" stroke and operating with 85% volumetric
efficiency, what is the capacity of this pump?
354 gpm
295 gpm
machining a smooth
surface
can be quickly
removed by simply
shutting down the
coils
short cycling of the
compressor on the
water failure switch
74 gpm
If a refrigeration system were short of refrigerant, the
condition would result in __________.
continuous running
of the compressor
If you have a duplex double acting reciprocating pump 123 gpm
making 210 strokes/minute, with a 4" diameter cylinder,
a 7" stroke and operating with 77% volumetric
efficiency, what is the capacity of this pump?
62 gpm
108 gpm
31 gpm
If you have a duplex single acting reciprocating pump
62 gpm
making 130 strokes/minute, with a 6" diameter cylinder,
a 5" stroke and operating with 93% volumetric
efficiency, what is the capacity of this pump?
37 gpm
148 gpm
74 gpm
If you have a duplex double acting reciprocating pump 113 gpm
making 160 strokes/minute, with a 6" diameter cylinder,
a 13" stroke and operating with 89% volumetric
efficiency, what is the capacity of this pump?
453 gpm
227 gpm
491 gpm
Figure "I" shown in the illustration is a diagram of a
115%
valve hand wheel, with S=5 inches and T=50 lbs. When
an 18 inch cheater bar is used instead, and V=50 lbs.,
as shown in Figure "II", what value of additional torque
is now being applied to the hand wheel valve stem?
154%
250%
360%
high suction pressure high discharge
pressure
Illustr
GS-0090
GS-0109
304
Book Num
11
11
3870
3871
Ans
D
A
11
3872
B
11
3873
B
11
3874
B
11
3875
D
11
11
11
11
11
3876
3877
3879
3880
3881
B
B
A
A
D
Question
Answer A
If a block and tackle arrangement were rigged as shown 57 lbs.
in figure "F" in the illustration, the amount of force "P"
required to hold the 348 pound load stationary would be
__________.
If you have a duplex single acting reciprocating pump
259 gpm
making 170 strokes/minute, with a 6" diameter cylinder,
a 14" stroke and operating with 89% volumetric
efficiency, what is the capacity of this pump?
Answer B
66 lbs.
Answer C
79 lbs.
Answer D
87 lbs.
GS-0110
605 gpm
130 gpm
519 gpm
If you have a duplex double acting reciprocating pump 98 gpm
making 100 strokes/minute, with a 6" diameter cylinder,
a 10" stroke and operating with 80% volumetric
efficiency, what is the capacity of this pump?
196 gpm
272 gpm
49 gpm
A "barrel" is defined as a unit of liquid, measured at 60° 31.5 U.S. gallons
F, and is equivalent to __________.
On the refrigeration valve shown in the illustration, the back disc
part labeled "D" is the __________.
If your vessel burns 4 tons of fuel per hour at 21 knots, 3.0 tons
how many tons per hour will it burn at 16 knots?
42.0 U.S. gallons
55.0 U.S. gallons
60.0 U.S. gallons
front disc
seal cap
normal discharge
5.3 tons
2.3 tons
1.8 tons
If you have a duplex double acting reciprocating pump 76 gpm
making 160 strokes/minute, with a 4" diameter cylinder,
a 6" stroke and operating with 91% volumetric
efficiency, what is the capacity of this pump?
95 gpm
104 gpm
183 gpm
Which of the statements listed concerning heat transfer Heat is always
is correct?
transferred at a
constant rate.
Heat transfer rate
increases as
temperature
difference increases.
The high
temperature region is
known as a heat
sink.
If you have a duplex single acting reciprocating pump
54 gpm
making 120 strokes/minute, with a 6" diameter cylinder,
a 4" stroke and operating with 92% volumetric
efficiency, what is the capacity of this pump?
36 gpm
The rate of heat
transfer is not
affected by
temperature
difference.
27 gpm
108 gpm
rate of heat transfer
from one substance
to another
total heat contained
in any closed energy
system
27 gpm
109 gpm
Temperature measurement is an indication of the
__________.
level of heat intensity total heat of a
substance
If you have a duplex double acting reciprocating pump 54 gpm
making 170 strokes/minute, with a 3" diameter cylinder,
a 12" stroke and operating with 87% volumetric
efficiency, what is the capacity of this pump?
305
Illustr
217 gpm
RA-0008
Book Num
Ans
11
3882
B
11
3883
D
11
3884
A
11
11
11
3886
3887
3888
C
A
A
11
3890
B
11
3891
D
11
3892
D
11
3893
A
Question
Answer A
If you have a duplex single acting reciprocating pump
181 gpm
making 190 strokes/minute, with a 3" diameter cylinder,
a 11" stroke and operating with 77% volumetric
efficiency, what is the capacity of this pump?
Answer B
49 gpm
Answer C
25 gpm
Answer D
98 gpm
The reading indicated on a vernier micrometer caliper
scale is .3128 inches. Which of the figures in the
illustration represents this reading?
When adding oil to a refrigeration system, you must be
certain that __________.
Figure C
Figure E
Figure F
If you have a duplex double acting reciprocating pump
making 160 strokes/minute, with a 5" diameter cylinder,
a 7" stroke and operating with 96% volumetric
efficiency, what is the capacity of this pump?
Figure B
GS-0091
all air is removed
from the pump and
fittings
91 gpm
the suction strainer is the discharge
not blocked
pressure is not too
high
128 gpm
183 pm
the condenser is
secured
46 gpm
After a refrigeration plant has been open for repairs, it is slightly opening the
advisable to purge air from the system by __________. purge valve on the
condenser
cracking the valve
bonnet assembly on
the thermostatic
expansion valve
turning over the
loosening the purge
compressor flywheel connection attached
with the suction line to the receiver head
valve open
If you have a duplex double acting reciprocating pump 78 gpm
making 330 strokes/minute, with a 3" diameter cylinder,
a 4" stroke and operating with 96% volumetric
efficiency, what is the capacity of this pump?
39 gpm
52 gpm
19 gpm
If you have a duplex single acting reciprocating pump
132 gpm
making 130 strokes/minute, with a 5" diameter cylinder,
a 8" stroke and operating with 93% volumetric
efficiency, what is the capacity of this pump?
82 gpm
41 gpm
164 gpm
Which practices should be followed at all times when
using an electric grinding machine?
Safety glasses should be worn when __________.
When a refrigeration system is being charged through
the low side, the __________.
Illustr
Wear goggles or
face shield.
Be certain that the
frame is properly
grounded.
using a hand
scraping paint with a
portable grinder
hand scraper
refrigerant should be suction service valve
added as a vapor
must be back seated
306
Be properly trained in Each of the above
the use of this tool.
practices.
using a hammer and
chisel
discharge service
valve must be front
seated
all of the above
refrigerant drum
should be turned
upside down
Book Num
11
11
11
11
3894
3895
3896
3897
Ans
Question
Answer A
Which of the following statements is correct concerning To gain sensitivity,
the testing of an R-12 refrigeration system for leaks in
the largest possible
an enclosed compartment?
flame should be used
with the halide torch.
Answer B
The flame of a halide
torch will turn blue in
the presence of R12.
Answer C
Halide torches are
useful in locating
very small R-12
leaks.
C
C
D
A
11
3898
D
11
3899
B
11
3900
C
11
3901
C
11
3902
B
Answer D
Rapid leak testing is
possible with the
halide torch since
there is no time lag
between the time air
enters the exploring
tube until it hits the
reactor plate.
Coast Guard Regulations (46 CFR) require that a small temperature limiting manual pressure
electrically heated hot water supply boiler, must be fitted regulating valve to be regulator
with a/an __________.
set at not more than
220° Fahrenheit
temperature limiting audible high water
control device set for level alarm
not more than 210°
Fahrenheit
If you have a duplex double acting reciprocating pump 108 gpm
making 180 strokes/minute, with a 6" diameter cylinder,
a 5" stroke and operating with 98% volumetric
efficiency, what is the capacity of this pump?
54 pm
90 gpm
216 gpm
are automatically
open a secondary
reset when the
power supply to the
heater elements only
temperature drops
below 90° C (194° F)
prevent the water
from attaining a
temperature of more
than 90° (194° F)
If you have a duplex double acting reciprocating pump 75 gpm
making 160 strokes/minute, with a 6" diameter cylinder,
a 4" stroke and operating with 96% volumetric
efficiency, what is the capacity of this pump?
50 gpm
38 gpm
150 gpm
The instrument always used in conjunction with a
pyrometer
salinometer is a __________.
The flash point of a petroleum product is an indication
viscosity
of its __________.
If you have a duplex single acting reciprocating pump
35 gpm
making 120 strokes/minute, with a 5" diameter cylinder,
a 9" stroke and operating with 92% volumetric
efficiency, what is the capacity of this pump?
thermometer
hygrometer
hydrometer
pour point
volatility
lower explosive limit
42 gpm
84 gpm
169 gpm
The temperature, in degrees Fahrenheit, at which a
liquid gives off a flammable vapor when heated in an
open cup tester is called the __________.
flash point
flame point
ignition point
Coast Guard Regulations (46 CFR) for electric storage
tank-type hot water heaters, required temperature limit
controls to __________.
prevent the water in
the upper 25% of the
tank from attaining a
temperature higher
than 99° C (210° F)
fire point
307
Illustr
Book Num
11
11
11
11
11
3903
3904
3905
3906
3907
Ans
C
A
A
A
3908
D
11
3909
D
11
3910
B
11
3911
3912
Answer B
103 gpm
During the initial cooling down of a box temperature in a
refrigeration system, which of the devices listed is used
to prevent excessive gas pressure at the compressor
suction?
The flash point of a liquid refers to the temperature
__________.
Suction pressure
hold back valve
High pressure cutout Solenoid valve
Low pressure cutout
at which a liquid will
give off inflammable
vapors
at which a liquid will
burn steadily
at which a liquid will
explode
that a liquid must
reach before it will
flow readily
102 gpm
85 pm
51 gpm
If you have a duplex double acting reciprocating pump 205 gpm
making 190 strokes/minute, with a 6" diameter cylinder,
a 5" stroke and operating with 88% volumetric
efficiency, what is the capacity of this pump?
D
C
Answer C
52 gpm
Answer D
336 gpm
The flash point of a liquid is the __________.
temperature at which temperature at which
it burns freely
paraffin wax begins
to crystallize out of
the solution
lowest temperature
at which it vaporizes
enough to form an
explosive air/vapor
mixture
ability of a fuel to
ignite upon injection
into a diesel engine
cylinder
The lowest temperature at which the vapors of a
flammable liquid will ignite and cause self-sustained
combustion in the presence of a spark or flame is the
__________.
Oils are usually graded by their service classification
and __________.
During operating temperature changes, the ability of a
lubricating oil to resist viscosity changes is indicated by
a/an __________.
If you have a simplex single acting reciprocating pump
making 180 strokes/minute, with a 4" diameter cylinder,
a 12" stroke and operating with 80% volumetric
efficiency, what is the capacity of this pump?
auto ignition
temperature
vaporization
temperature
flash point
fire point
fire point
flash point
viscosity
API number
viscosity index
number
neutralization
number
seconds Saybolt
Furol number
188 gpm
94 gpm
282 gpm
47 gpm
Five
Six
Seven
C
11
11
Question
Answer A
If you have a simplex single acting reciprocating pump 207 gpm
making 190 strokes/minute, with a 4" diameter cylinder,
a 13" stroke and operating with 77% volumetric
efficiency, what is the capacity of this pump?
The general service pump is to be used to remove
Four
clean water from the No. 4 port aft cargo hold and
discharged through the ballast overboard. What are the
minimum number of valves that must be opened on
both the suction and discharge to accomplish this task?
Illustr
seconds Saybolt
Universal number
GS-0042
308
Book Num
Ans
11
3913
D
11
3914
B
11
3915
D
11
11
3916
3917
B
Question
Answer A
If you have a duplex double acting reciprocating pump 25 gpm
making 120 strokes/minute, with a 4" diameter cylinder,
a 13" stroke and operating with 92% volumetric
efficiency, what is the capacity of this pump?
Copper piping has been used in refrigeration systems
because __________.
3918
D
11
3919
A
11
3920
A
11
3921
D
11
3922
C
11
3923
C
11
3924
C
Answer C
78 gpm
Answer D
156 gpm
oxidation inhibitors
140 gpm
extreme pressure
additives
47 pm
all of the above
35 gpm
What is the harmful effect of sulfur in a fuel?
It forms a corrosive
It causes excessive It doesn't readily burn It clogs fuel oil
smoking and soot at when combined with strainers more often. acid when mixed with
water or water vapor.
oxygen.
low firing rates.
A journal rotating in its bearing relies on hydrodynamic
principles for lubrication. Under steady load conditions,
the journal rotating in the bearing will assume a position
__________.
Which letter represents the gear tooth working depth of
the gear set illustrated?
Which of the following lube oil filters would be
considered acceptable for use with today's high
detergent additive type oils?
at bearing bottom
center
concentric in the
bearing
at bearing top center eccentric in the
bearing
A
B
C
D
Cotton waste packed
in perforated metal
containers or
cylindrical cartridges.
Cylindrical elements
containing fullers
earth combined with
cellulose.
Foamed
polyurethane of the
impingement type
supported on
perforated metal
rings.
Chemically treated
paper and waste in
cartridges.
Cloth bag extractor
Absorbent filter
Adsorbent filter
83 gpm
42 gpm
146 gpm
Which of the filters listed will deplete the additives in
Extended area
lubricating oil?
membrane filter
If you have a simplex single acting reciprocating pump 167 gpm
making 270 strokes/minute, with a 4" diameter cylinder,
a 7" stroke and operating with 81% volumetric
efficiency, what is the capacity of this pump?
When securing a steam reciprocating pump, which of
the valves listed should remain open?
The device used to limit the passage of moisture
through a refrigeration system is the __________.
Illustr
it is creep resistant at it offers greater heat iron is corroded by R- leaks are more easily
low temperatures
transfer coefficient
12
detected in copper
Additives commonly found in turbine lubricating oil
antifoaming agents
include __________.
If you have a duplex double acting reciprocating pump 70 gpm
making 150 strokes/minute, with a 6" diameter cylinder,
a 4" stroke and operating with 95% volumetric
efficiency, what is the capacity of this pump?
D
11
Answer B
39 gpm
Steam supply valve
humidifier
309
Steam exhaust valve Steam cylinder drain Water cylinder drain
valve
valve
aerator
dehydrator
trap
GS-0111
Book Num
11
11
11
11
3925
3926
3927
3928
Ans
A
C
A
B
11
3929
C
11
3930
C
11
11
11
3931
3932
3933
D
A
B
Question
Answer A
If you have a duplex double acting reciprocating pump 378 gpm
making 120 strokes/minute, with a 6" diameter cylinder,
a 14" stroke and operating with 92% volumetric
efficiency, what is the capacity of this pump?
Answer B
189 gpm
Answer C
441 gpm
Answer D
95 gpm
If you have a duplex double acting reciprocating pump 263 gpm
making 170 strokes/minute, with a 8" diameter cylinder,
a 8" stroke and operating with 89% volumetric
efficiency, what is the capacity of this pump?
363 gpm
527 gpm
132 gpm
An automatic temperature controller, with a net output
1.0 psi/° F
pressure of 15 psi and a full scale range of 15° F, would
have a sensitivity ratio of __________.
3.9 psi/° F
10.0 psi/° F
12.25 psi/° F
An orifice
As a watchstander you should know that some
auxiliaries are not designed to handle steam at boiler
pressure. Which of the devices listed is usually fitted in
the branch line to deliver steam at the correct pressure?
A steam pressure
reducing valve
A nozzle valve
A constant quantity
regulating valve
sensitivity
A mechanical and/or hydraulic action preventing the
over- correction of the fuel supply, while producing
transient speed droop is called __________.
stability
hunting
compensation
A pyrometer is capable of producing a voltage by
__________.
chemical reaction
light striking a photo
sensitive substance
heating a junction of squeezing crystals of
two dissimilar metals certain substances
Before setting out on a three day voyage, Coast Guard
Regulations require that the steering gear, whistle, and
communications system between the bridge and engine
room must be tested within how many hours prior to
departure?
Coast Guard Regulations (46 CFR) require that any
tankship making a voyage 'of over a 48 hour duration'
must have certain tests conducted not more than 12
hours prior to leaving port. Meeting this requirement
includes the testing of the __________.
1 hour
4 hours
8 hours
means of
communication
between the bridge
and engine room
fire pump relief valve watertight door to the emergency lighting
shaft alley
system
Pillar cross-sections of "I", "H", or circular are used in
not be critical until
ship construction in locations where there are large
the vertical angle
expanses, void of intermediate decks and bulkheads,
approaches 15°
such as in cargo holds and engine rooms. A supporting
pillar which becomes bent out of vertical will
__________.
310
loose practically all of most likely
its strength as a
experience shear
support
stress failure if not
reinforced
immediately
12 hours
not pose any
problem, provided
there are no cracked
welds connecting it
to any adjoining
strength members
Illustr
Book Num
11
11
3934
3936
Ans
B
D
11
3937
B
11
3938
C
11
3939
A
11
3940
D
11
3941
C
11
3942
C
11
3943
D
11
3944
B
11
3945
A
11
3946
A
Question
The back pressure regulating valve used in a
refrigeration system serves to __________.
If you have a duplex double acting reciprocating pump
making 190 strokes/minute, with a 3" diameter cylinder,
a 9" stroke and operating with 90% volumetric
efficiency, what is the capacity of this pump?
Answer A
maintain a constant
pressure in the
suction line heat
exchanger
47 gpm
141 gpm
Answer C
limit the maximum
pressure in the
suction line heat
exchanger
24 gpm
94 gpm
625 gpm
507 gpm
156 gpm
red and white
yellow and white
yellow and blue
yellow and red
landing area and
sources of vapor
ignition
the operating draft
main deck
engine room
drill floor
the survival draft
the transit draft
the deepest load line
hydraulically
powered only for
closing
USCG Equipment
List
tested at each
inspection for
certification
vessel's Certificate of
Inspection
tested within 12
hours after leaving
port
vessel's current
articles
official ship's paper
hull certificate
If you have a duplex double acting reciprocating pump 312 gpm
making 120 strokes/minute, with a 8" diameter cylinder,
a 13" stroke and operating with 92% volumetric
efficiency, what is the capacity of this pump?
The helicopter deck on an offshore drilling unit is
required to be fitted with perimeter lights in alternating
colors of __________.
Each drilling unit equipped with helicopter fuel storage
tanks must have the tanks installed as far as practicable
from the __________.
On all mobile offshore drilling units, the deckhead of
each accommodation space must be located above
__________.
Coast Guard Regulations (46 CFR) require watertight
doors in cargo vessels to be __________.
The minimum firefighting equipment to be maintained
onboard a tank vessel, can be determined from the
__________.
The vessel's firefighting equipment is listed on the
__________.
A solenoid valve used in a refrigeration system should
be installed __________.
electrically controlled
from a remote
location
USCG Firefighting
Manual for Tank
Vessels
Muster List ("Station
Bill")
with the axis of the
solenoid horizontal,
sensing temperature
of the box, and
upstream of the
thermal expansion
valve
Where would you find a list of the firefighting equipment Certificate of
required on your vessel?
Inspection
If you have a duplex double acting reciprocating pump 682 gpm
making 160 strokes/minute, with a 8" diameter cylinder,
a 11" stroke and operating with 89% volumetric
efficiency, what is the capacity of this pump?
311
Answer B
limit the minimum
pressure in the
evaporator
Answer D
maintain a minimum
discharge head on
the compressor
Certificate of
Inspection
upright, sensing
upright, sensing
upright, sensing
temperature of the
temperature of the
superheat of the tail
box, and upstream of box, and downstream coil, and upstream of
the thermal
of the thermal
the thermal
expansion valve
expansion valve
expansion valve
Muster List ("Station Official logbook
Bill")
341 gpm
469 gpm
In the captain's desk
170 gpm
Illustr
Book Num
Ans
11
3947
C
11
3948
D
11
11
11
3949
3950
3951
B
Question
To determine the number of industrial personnel
allowed on a mobile offshore drilling unit, you should
check the __________.
To determine the number of inflatable liferafts required
on a mobile offshore drilling unit, you should check the
__________.
According to the regulations for mobile offshore drilling
units, 'industrial personnel' are considered to be all
persons carried on the MODU for the sole purpose of
carrying out the industrial business of the unit, except
for __________.
With regards to shipboard refrigeration systems, after
November 14, 1994 it is illegal to __________.
A
C
3952
D
11
3954
C
11
3955
C
11
3956
B
3957
C
load line certificate
operations manual
Certificate of
Inspection
the operator's
representative
the crew required by the galley personnel the designated
the Certificate of
person in charge
Inspection
intentionally vent
class I or II
refrigerants to the
atmosphere
work on a
mix R-12 and R-22
refrigeration system
without permission of
the Officer in Charge
Marine Inspection
produce a class I
refrigerant
29 gpm
57 gpm
114 gpm
Emergency astern
operations,
regardless of vessel
location
Run emergency
generator, driven by
an internal
combustion engine,
under load for at
least 2 hours.
Storage batteries to All vessel internal
provide all power for control system
the vessel and
alarms.
operated under load
for emergency
lighting.
Stability letter
When starting a reciprocating refrigeration compressor sea water valve
that has been shutdown for a period of time, you should
manually throttle the __________.
king valve
suction valve
expansion valve
The type of gage most commonly used to measure
bimetallic type
pressure is the __________.
If you have a duplex double acting reciprocating pump 94 gpm
making 180 strokes/minute, with a 4" diameter cylinder,
a 12" stroke and operating with 80% volumetric
efficiency, what is the capacity of this pump?
diaphragm type
bourdon tube type
188 gpm
282 gpm
resistancetemperature type
47 gpm
Purging is the process used to __________.
11
Answer D
operations manual
86 gpm
If you have a duplex single acting reciprocating pump
making 250 strokes/minute, with a 4" diameter cylinder,
a 6" stroke and operating with 70% volumetric
efficiency, what is the capacity of this pump?
Coast Guard Regulations require that vessels of 500
GT or less, what equipment must be tested weekly?
11
Answer A
Answer B
Answer C
Muster List ("Station Safety of Life at Sea Certificate of
Bill")
Certificate
Inspection
eliminate moisture
separate refrigerant
from the refrigeration from oil
system
312
remove
noncondensable
gases from the
refrigeration system
decrease the total
amount of refrigerant
in the system
Illustr
Book Num
11
3958
Ans
D
11
3962
D
11
3963
C
11
11
3964
3965
D
D
11
3966
C
11
3968
D
11
3971
C
11
11
11
3972
3973
3974
C
A
C
Question
Gate valves should not be used for throttling as
__________.
Answer A
Answer B
the pressure drop will air binding will
be excessive
develop
If you have a duplex single acting reciprocating pump
40 gpm
making 170 strokes/minute, with a 5" diameter cylinder,
a 4" stroke and operating with 87% volumetric
efficiency, what is the capacity of this pump?
25 gpm
A purge connection installed on the refrigerant side of a free tubes of
water cooled condenser is used to __________.
accumulated scale
charge the system
with refrigerant
If two compressors must be operated in parallel in order discharge pressure
to maintain the box temperatures, a careful watch
gauges of both
should be kept on the __________.
compressors
suction pressure
gauges of both
compressors
A gear train is constructed with only two gears: a 2-inch 6 inches (152.4 mm) 12 inches (304.8
mm)
(50.5 mm) diameter driving gear and a driven bull gear
to rotate a propeller at 200 rpm. If the speed of the
driving gear is 4,800 rpm, what is the diameter of the
driven gear?
225 gpm
If you have a duplex double acting reciprocating pump 150 gpm
making 160 strokes/minute, with a 6" diameter cylinder,
a 9" stroke and operating with 85% volumetric
efficiency, what is the capacity of this pump?
The valve shown in the illustration is designed to seal
against positive pressure leaks around the valve stem
by the use of __________.
In order to increase the set point of the control valve
illustrated to regulate the output temperature of a lube
oil cooler, the part labeled __________.
In order to increase the set point of the control valve as
illustrated, used to regulate the output temperature of a
refrigeration condenser, the part labeled __________.
Answer C
Answer D
the installation of an cutting of the disc will
equalizing line will be result
necessary
101 gpm
50 gpm
remove
noncondensable
gases
expansion valves of
both evaporator coils
ensure positive air
circulation
24 inches (609.6
mm)
48 inches (1219.2
mm)
300 gpm
75 gpm
an external sealing
line
adjustable packing
gland
GS-0047
GS-0043
oil levels in both
compressor
crankcases
a two piece rotating
mechanical seal
rubber "O" rings
"K" must be rotated
clockwise
"A" must be rotated
counterclockwise
"A" must be rotated
clockwise
"K" must be rotated
counterclockwise
"K" must be rotated
clockwise
"A" must be rotated
counterclockwise
"A" must be rotated
clockwise
"K" must be rotated
counterclockwise
If you have a duplex single acting reciprocating pump
45 gpm
making 130 strokes/minute, with a 4" diameter cylinder,
a 7" stroke and operating with 90% volumetric
efficiency, what is the capacity of this pump?
78 gpm
22 gpm
89 gpm
When a refrigerated compartment of a multi-box system expansion valve
served by one compressor reaches the correct
temperature, the temperature control in that one
compartment is achieved by a/an __________.
back pressure
regulating valve
solenoid valve
low pressure cutout
switch
313
Illustr
GS-0043
Book Num
11
11
11
11
3975
3976
3977
3978
Ans
B
D
B
C
11
3980
D
11
3981
A
11
3982
B
11
3984
C
11
3985
B
11
3986
A
11
3987
C
Question
Answer A
In order to decrease the set point of the control valve as "K" must be rotated
illustrated, used to regulate the output temperature of a clockwise
lube oil cooler, the part labeled __________.
Answer B
"A" must be rotated
counterclockwise
Answer C
"A" must be rotated
clockwise
Answer D
"K" must be rotated
counterclockwise
If you have a duplex double acting reciprocating pump 75 gpm
making 160 strokes/minute, with a 6" diameter cylinder,
a 4" stroke and operating with 96% volumetric
efficiency, what is the capacity of this pump?
50 gpm
38 gpm
150 gpm
In order to decrease the set point of the control valve as "K" must be rotated
illustrated, used to regulate the output temperature of a clockwise
refrigeration condenser, the part labeled __________.
"A" must be rotated
counterclockwise
"A" must be rotated
clockwise
"K" must be rotated
counterclockwise
The unit completes
two suction and
discharge cycles in
one revolution.
directly below the
point of maximum
heat transfer
The unit is designed
to pump liquids.
07.350 psig
29.400 psig
The correct rotation
Which of the following characteristics is true concerning The unit does not
the device shown in the illustration?
require sealing liquid. of the impeller is
counter-clockwise as
shown.
If the evaporator coil horizontal return line of a container on the bottom of the as close as possible
to the expansion
refrigeration system is less than 0.874" (2.21 cm) in
line to enable the
bulb to absorb the
valve
diameter, the thermostatic expansion valve sensing
maximum amount of
bulb should be placed __________.
heat
A turbine exhaust pressure of 14.7 psia is equal to
00.000 psig
01.470 psig
__________.
1000 tons (1016.47 t) 2000 tons (2032.94 t)
In diagram "A", shown in the illustration, what is the
displacement of the vessel when it is at a six foot (1.829
m) draft?
The thermostatic expansion valve in a refrigeration
decreases in the
decreases in the
system opens when the pressure __________.
evaporator
expansion valve
control bulb
If you have a duplex single acting reciprocating pump
96 gpm
80 gpm
making 180 strokes/minute with 5" diameter cylinder,
and a 6" stroke with 87% volumetric efficiency, what is
the capacity of this pump?
GS-0043
GS-0075
3000 tons (3049.41 t) 4000 tons (4065.88 t)
SF-0024
increases above the increases in the
expansion valve
solenoid valve
diaphragm
40 gpm
160 gpm
104 gpm
134 gpm
225 gpm
A reading of 0.250 on a micrometer with a 1 to 2 inch
range is equal to __________.
1/2 inch
1 1/4 inches
2 1/4 inches
314
GS-0043
on the upper surface
of the line
If you have a duplex double acting reciprocating pump 80 gpm
making 170 strokes/minute, with a 3" diameter cylinder,
a 10" stroke and operating with 77% volumetric
efficiency, what is the capacity of this pump?
1/4 inch
Illustr
Book Num
11
3989
Ans
B
Question
The disc of a relief valve has an area of 0.75 square
inches (483.87 square mm) when seated, and lifts at a
set point pressure of 250 psi (1723.50 kPa). When the
valve lifts, the area of the disc exposed to pressure
increases by 10%. At what pressure does the valve
reseat?
Answer A
206 psi (1420.16
kPa)
Answer B
227 psi (1564.94
kPa)
Answer C
231 psi (1592.51
kPa)
Answer D
250 psi (1723.50
kPa)
The controller set point of an automatic control system
is 150° F (65.5° C). The valve closes when the output
temperature reaches 160° F (71.1° C), and reopens
when the temperature falls below 140° F (60° C). The
type of positioning action in this controller is known as
__________.
one-position singlepoint
two-position singlepoint
one-position
differential-gap
two-position
differential-gap
10 ft-lb (1.38 kg-m)
20 ft-lb (2.76 kg-m)
100 ft-lb (13.83 kgm)
1000 ft-lb (138.25 kgm)
the valve will never
permit water flow
from the lube oil
cooler
the valve will allow
the lube oil
temperature to be
10° F (5.5° C) cooler
than if the valve were
properly installed
102.9 long tons
205.7 long tons
11
3990
D
11
3991
C
What is the potential energy of an object weighing 10
pounds (4.54 kg) at a height of 10 feet (3.05 m)?
C
An 8-inch (203 mm), globe-type, stop-check valve has the valve will remain the valve will prevent
back flow
been installed in the lube-oil cooler water outlet, with the completely open
flow coming in from the top of the disk. This means that
__________.
11
3992
11
3993
B
11
3994
D
11
3995
C
11
3996
B
11
3997
B
What is the weight of the empty barge shown in the
illustration if it is currently drawing one foot of salt
water? [ Its length is 40', width is 20', and its height is
10' ]
The pressure in a small appliance refrigeration system
about to be opened for repair should be __________.
10.3 long tons
22.9 long tons
Illustr
GS-0157
15 inches Hg
14.7 psig
1 to 2 psig
4 inches Hg vacuum
The barge shown in the illustration is 40' X 20' X 10'
19.4 long tons (19.72 49.1 long tons (49.91 91.4 long tons (92.91 94.1 long tons (95.65
(12.192 m X 6.096 m X 3.048 m ) and weighs 22.9 long t)
t)
t)
t)
tons (23.28 t) when empty. It has been loaded to a draft
GS-0157
of 5 feet (1.524 m) in salt water. How many long tons of
cargo have been added?
If you have a duplex double acting reciprocating pump 48 gpm
95 gpm
104 gpm
225 gpm
making 160 strokes/minute, with a 4" diameter cylinder,
a 6" stroke and operating with 91% volumetric
efficiency, what is the capacity of this pump?
The barge shown in the illustration is 40' X 20' X 10'
144.8 long tons
(12.192 m X 6.096 m X 3.048 m) and weighs 22.9 long
tons when empty. It has been loaded to a draft of 8 feet
in salt water. How many long tons of cargo have been
added?
315
159.8 long tons
183.9 long tons
243.3 long tons
GS-0157
Book Num
11
11
11
11
3998
3999
4001
4002
Ans
A
C
A
A
11
4003
B
11
4004
C
11
4005
4008
D
11
4009
A
4010
The ball float shown in the illustration is 7 inches in
diameter, with an effective float arm of 31.5 inches and
floats in a liquid with a specific gravity of 0.95. What is
the operating torque of the system?
A
94.5 inch-pounds
Answer B
212° F
Answer C
300° F
Answer D
315° F
150 gpm
120 gpm
30 gpm
100.8 inch-pounds
121.4 inch-pounds
220.5 inch-pounds
Illustr
GS-0158
"C" and "F"
When responding to a 'left rudder' command from the
amidships position, which parts of the steering gear
system illustrated will be subjected to the highest
pressure?
25 gpm
If you have a duplex single acting reciprocating pump
making 160 strokes/minute, with a 4" diameter cylinder,
a 6" stroke and operating with 91% volumetric
efficiency, what is the capacity of this pump?
The charging of a refrigerating system should be carried refrigerant vapor to
out by adding __________.
the receiver only
"E" and "B"
"F" and "E"
"B" and "C"
GS-0137
48 gpm
76 gpm
101 gpm
liquid refrigerant to
the low side only
liquid refrigerant to
the high side only
liquid refrigerant to
the high or low side
Why is a hydraulic linear actuator fitted with a
cushioning device?
To regulate actuator To slow the action of
speed through the
the piston preventing
entire stroke length. shock and damage
due to hammering
effects.
Which of the listed types of soap grease offers the
maximum chemical stability and resistance to
separation at temperatures between 250° F (121.1° C)
and 300° F (148.8° C)?
When gas welding or burning, the acetylene working
pressure must be kept below 15 psi (103.41 kPa) to
prevent a possible __________.
In the illustrated system, what pressure will be indicated
on the gauge if the load (x) is 8000 lbs (3632 kg) and
the piston area is 10 sq. in (64.5 sq. cm)?
Lime soap grease
Calcium soap grease Sodium soap grease Lithium soap grease
explosion
torch backfire
torch flameout
acetone fire
800 psi (56.31
kg/cm2)
8,000 psi (563.1
kg/cm2)
80,000 psi (5631.0
kg/cm2)
80 psi (5.63 kg/cm2)
B
11
11
Question
Answer A
What is the lowest permissible flashpoint of the oil used 200° F
in a hydraulic valve actuating system that operates at
145 psi? (46 CFR)
If you have a duplex double acting reciprocating pump 60 gpm
making 120 strokes/minute, with a 4" diameter cylinder,
a 10" stroke and operating with 92% volumetric
efficiency, what is the capacity of this pump?
316
To allow the pump to All of the above.
temporarily operate
at a pressure 10%
above the relief valve
setting without lifting
the relief valve.
GS-0062
Book Num
11
11
4011
4012
Ans
B
C
11
4013
D
11
4014
C
11
11
11
11
11
11
11
4015
4016
4017
4018
4019
4020
4021
C
B
A
D
B
A
A
Question
Answer A
In the illustrated system, what pressure will be indicated 640 psi (44.99
on the gage if the load (x) is 8000 lbs (3632 kg) and the kg/cm2)
piston area (y) is 8 sq. in (51.6 sq. cm)?
Answer B
1,000 psi (70.3
kg.cm2)
Answer C
64,000 psi (449.2
kg/cm2)
Answer D
125 psi (8.79
kg/cm2)
In the illustrated system, what pressure will be indicated 10,000 psi (703
on the gage if the load (x) is 10,000 lbs (4540 kg) and
kg/cm2)
the piston area (y) is 8 sq. in (51.6 sq. cm)?
80,000 psi (5,624
kg/cm2)
1,250 psi (87.88
kg/cm2)
156.25 psi (10.89
kg/cm2)
If you have a duplex double acting reciprocating pump 66 gpm
making 270 strokes/minute, with a 4" diameter cylinder,
a 6" stroke and operating with 75% volumetric
efficiency, what is the capacity of this pump?
99 gpm
33 gpm
132 gpm
reground
Leaking discharge reed valves in a refrigeration
compressor should be __________.
In the illustrated system, what pressure will be indicated 785 psi (55.19
on the gage if the load (x) is 702.68 lbs (319.02 kg) and kg/cm2)
the piston area (y) is 1.117 sq. in (7.21 sq. cm)?
relapped
replaced
rewound
353 psi (24.82
kg/cm2)
629 psi (44.22
kg/cm2)
283 psi (19.89
kg/cm2)
74 gpm
If you have a duplex single acting reciprocating pump
making 170 strokes/minute, with a 5" diameter cylinder,
a 12" stroke and operating with 85% volumetric
efficiency, what is the capacity of this pump?
147 gpm
173 gpm
354 gpm
If you have a duplex double acting reciprocating pump 291 gpm
making 150 strokes/minute, with a 5" diameter cylinder,
a 12" stroke and operating with 95% volumetric
efficiency, what is the capacity of this pump?
145 gpm
349 gpm
73 gpm
In the illustrated system, what pressure will be indicated 10,000 psi (703
on the gage if the load (x) is 10,000 lb (4,450 kg) and
kg/cm2)
the piston area (y) is 10 sq. in (64.5 sq cm.)?
100,000 psi (7,030
kg/cm2)
100 psi (7.03
kg/cm2)
1,000 psi (70.30
kg/cm2)
In the illustrated system, what pressure will be indicated 291 psi (20.46
on the gage if the load (x) is 9984 lbs (4532.7 kg) and
kg/cm2)
the piston area is 12 sq. in (77.4 sq. cm)?
832 psi (58.49
kg/cm2)
628 psi (44.15
kg/cm2)
220 psi (15.47
kg/cm2)
If a block and tackle arrangement were rigged as shown 127 lbs.
in figure "F" in the illustration, the amount of force "P"
required to hold the 508 pound load stationary would be
__________.
In the illustrated system, what pressure will be indicated 66.66 psi (4.69
on the gage if the load (x) is 2,530 lbs (1,148.48 kg) and kg/cm2)
the area of the piston (y) is 38 sq. in (244.8 sq. cm)?
145 lbs.
169 lbs.
203 lbs.
317
Illustr
GS-0062
GS-0062
GS-0062
GS-0062
GS-0062
GS-0110
8000 psi (562.4
kg/cm2)
55.55 psi (3.91
kg/cm2)
96000 psi (6,748.8
kg/cm2)
GS-0062
Book Num
11
4022
Ans
A
11
4023
D
11
4024
B
11
11
11
4027
4028
4029
A
A
B
11
4030
D
11
4033
C
11
4034
A
11
4035
A
11
4038
B
Question
Answer A
If a block and tackle arrangement were rigged as shown 94 lbs.
in figure "F" in the illustration, the amount of force "P"
required to hold the 376 pound load stationary would be
__________.
In the illustrated system, what pressure will be indicated 255 psi (17.93
on the gage if the load (x) is 632 lb (286.9 kg) and the
kg/cm2)
piston area (y) is 1.5 sq. in (9.6 sq. cm)?
Answer B
119 lbs.
565 psi (39.72
kg/cm2)
942 psi (66.22
kg/cm2)
424 psi (29.81
kg/cm2)
What is the color of the flame produced by a halide
Orange
torch when there is no refrigerant present?
If you have a duplex double acting reciprocating pump 101 gpm
making 170 strokes/minute, with a 5" diameter cylinder,
a 4" stroke and operating with 87% volumetric
efficiency, what is the capacity of this pump?
Blue
Red
Green
50 gpm
40 gpm
25 gpm
In the illustrated system, what pressure will be indicated 611 psi (42.95
on the gage if the load (x) is 758.7 lbs (344 kg) and the kg/cm2)
piston area (y) is 1.25 sq. in (8.0 sq. cm)?
471 psi (33.11
kg/cm2)
942 psi (66.22
kg/cm2)
306 psi (921.51
kg/cm2)
In the illustrated system, what pressure will be indicated 318 psi (22.63
kg/cm2)
on the gage if the load (x) is 500 lbs (227 kg) and the
piston area (y) is 0.63 sq. in. (4 sq. cm.]
796 psi (55.96
kg/cm2)
1,263.49 psi (88.8
kg/cm2)
785 psi (55.19
kg/cm2)
If you find the pressure of a R-12 refrigeration system to only recover the
be worked on is 0 psig, __________.
vapor refrigerant
only recover the
liquid refrigerant
recover liquid and
do not recover the
vapor refrigerant and refrigerant
have it reclaimed
Deck beams on a MODU are generally spaced at equal longitudinally
intervals and run __________.
In radiographic inspections, the standard test piece
penetrometer
included in every radiograph provides an effective
check on the overall quality and bears a numerical
relation to the thickness of the part being tested. This
piece is called a/an __________.
vertically
transversely
intermittently
intensimeter
lead filter gauge
exposure screen
The safety feature which assists the hydraulic crane
18
circuit illustrated to maintain the required boom angle is
a function of item __________.
According to Coast Guard Regulations (46 CFR), all
5 percent
pressure vessels other than unfired steam boilers shall
be protected by pressure-relieving devices that prevent
the pressure from rising more than __________ above
the maximum allowable working pressure.
1
6
5
318
Answer C
125 lbs.
Answer D
150 lbs.
Illustr
GS-0110
GS-0062
GS-0062
GS-0062
GS-0161
10 percent
15 percent
20 percent
Book Num
Ans
11
4039
C
11
4040
B
11
4041
B
Question
Answer A
Which of the tolerances listed is allowed on the outside .050 inch
diameter of the bushing illustrated?
The movement of steam piping, as a result of changes union joints
in temperature, is best compensated for by the use of
__________.
If you have a duplex double acting reciprocating pump 45 gpm
making 130 strokes/minute, with a 4" diameter cylinder,
a 7" stroke and operating with 90% volumetric
efficiency, what is the capacity of this pump?
Answer B
.003 inch
Answer C
.0005 inch
Answer D
1.2015 inches
expansion joints
flexitallic gaskets
rigid brackets
89 gpm
78 gpm
22 gpm
one or more oil fired
boilers or oil fuel
units
internal combustion all of the above
machinery used for
purposes other than
main propulsion
where the total
collective power is at
least 500 brake
horsepower
In the illustration shown, which of the listed components Valve, item "5"
would be removed or disconnected last during cleaning
and inspection of the tank internals?
Weir, item "7"
Coalescer bed, item
"9"
Which of the following conditions is true concerning a
radiograph taken on a large welded piping repair?
Porosity, a
discontinuity caused
by entrapped gas,
would occur as
various sized round
dark spots.
As long as the plane All of the above.
of a crack is not in
direct alignment with
the direction of
radiation, detection is
certain.
The steam coils in a high pressure evaporator used for a wire brush
saltwater service should be descaled with __________.
a needle gun
a chipping hammer
soap and water
If you have a simplex single acting reciprocating pump 53.7 gpm
making 150 strokes/minute, with a 5" diameter cylinder,
a 11" stroke and operating with 85% volumetric
efficiency, what is the capacity of this pump?
59.6 gpm
62.6 gpm
119.2 gpm
The ash content of a fuel oil is significant to the
operating engineer because it __________.
is useful for
determining proper
atomization
temperatures
reflects the overall
thermal efficiency of
the fuel oil service
systems
is an indication of the
amount of
noncombustible
material present in
the oil
Aboard tankers, the term Category "A" Machinery
Space, as defined by Coast Guard Regulations (46
CFR) means any space including trunks and ducts to
that space containing __________.
11
11
4042
4043
D
D
11
4044
B
11
4045
A
11
11
4046
4047
internal combustion
machinery used for
main propulsion
B
D
A discontinuity in the
form of a crack would
appear as a thin light
line against the dark
background of the
film.
indicates the quantity
of energy released
by burning a unit
amount of fuel
319
coalescer bed, item
"12"
Illustr
GS-0017
GS-0153
Book Num
Ans
11
4048
D
Question
Dirt should not be allowed to contaminate a grease
lubricant because the __________.
11
4049
D
The lubrication of a precision high speed bearing
depends upon a system that produces __________.
11
4050
B
11
4051
B
11
4052
C
11
4053
C
11
4054
D
11
4055
B
11
4058
B
11
4060
C
11
4061
C
11
4062
C
11
4063
D
When the rotating shaft frequency and the natural
vibrating frequency become synchronized at a particular
speed, that speed is known as the __________.
The function of the section labeled "C" in the device
illustrated is to provide a/an __________.
If you have a duplex double acting reciprocating pump
making 160 strokes/minute, with a 5" diameter cylinder,
a 6" stroke and operating with 85% volumetric
efficiency, what is the capacity of this pump?
Which of the following statements represents the last
step to be followed when replacing the power element
of the device shown in the illustration?
Tubing connections for refrigeration systems may be
made by __________.
The compressor in figure 4, if permitted to operate as
illustrated will __________.
Answer A
bearings will leak oil
excessively
Answer B
dirt will cause
corrosion of bearing
high detergent oil
with pressure
additives
breakaway speed
constant viscosity
lubrication
passage for sealing
liquid to enter the
pump
69 gpm
critical speed
Answer D
dirt is very abrasive
when mixed with
grease
a minimum of 15 psi adequate quantity at
to all parts of the
sufficient pressure
system
synchronous speed sympathetic speed
passage for gas to
be discharged
bearing surface for
the rotor shaft
area for pump
packing
83 gpm
139 gpm
35 gpm
Adjust the TXV for
proper evaporator tail
coil superheat.
silver brazing
Reset the
compressor cut-in
setting.
all of the above
Shorten the capillary Insulate the sensing
tubing.
bulb.
flaring
soldering
Answer C
grease will become
inflammable
damage the bearings damage the bearings cause the
of the compressor
of the driving motor compressor to use
more oil
If you have a simplex single acting reciprocating pump 4.5 gpm
making 130 strokes/minute, with a 3" diameter cylinder,
a 5" stroke and operating with 91% volumetric
efficiency, what is the capacity of this pump?
9.0 gpm
13.5 gpm
Vessel Operator's
Senior ABS surveyor Commandant (Gsenior Port Engineer
MOC)
U.S. Maritime
Administration
harder
less tough
less brittle
more brittle
When metal is tempered, it becomes __________.
harder
less flexible
less brittle
more brittle
52 gpm
21 gpm
83 gpm
320
GS-0075
RA-0007
result in a constant
enlargement of the
GS-0159
clearance expansion
volume
18 gpm
Coast Guard Regulations (46 CFR) permit the interval
required for drawing certain tail shafts to be extended
by the __________.
When metal is tempered, it becomes __________.
If you have a duplex double acting reciprocating pump 41 gpm
making 160 strokes/minute, with a 4" diameter cylinder,
a 5" stroke and operating with 95% volumetric
efficiency, what is the capacity of this pump?
Illustr
Book Num
11
11
11
11
11
11
4064
4065
4066
4068
4069
4070
Ans
A
D
C
C
A
B
Question
Answer A
In addition to removing water from a refrigerant, most
acid
dehydrators also effectively remove entrapped
__________.
Which of the following statements is true concerning the The pump discharge
pump characteristics shown in the illustration?
head when operating
at maximum
efficiency is
approximately 132
feet
Which of the following statements is true concerning the Maximum pump
pump characteristics shown in the illustration?
horsepower is
developed between
1600 and 1800 GPM.
4071
D
Answer B
Answer C
Answer D
dichlorodifluorometh desiccant
ane
Operating the pump
at maximum
efficiency would
require
approximately 58
horsepower
The pump capacity All of the above
would be
approximately 1480
GPM when operating
at maximum
efficiency
Maximum pump
dynamic discharge
pressure is
approximately 160
PSI
Maximum efficiency
occurs when the
pump is operating
between a 120 foot
and 140 foot head.
All of the above
Gage #7 would be
classified as a
compound gage.
Gage #6 is usually
colored blue.
Which of the following statements is true concerning the The device is mainly Gage #7 is usually
illustration?
used to indicate the colored red.
superheat
temperature of the
refrigerant in the
system.
Using the device shown in the illustration, which of the
following statements is true when adding a charge to a
refrigeration system.
Fitting #3 should be
connected to the
refrigerant cylinder
Fitting #4 should be
connected to the
system low side
Which of the following statements is true concerning the Valves 1 and 5 must Closing valve 1
illustration?
both be opened to
isolates line #2 from
read system
line #3
pressures on the
respective gages.
Which of the following is true concerning the system
shown in the following illustration?
11
air
The system cannot
control the relative
humidity of the
conditioned air
321
Illustr
GS-0138
GS-0138
RA-0001
Fitting #2 should be
connected to the
system high side
All of the above
Closing valve 1
isolates gage #7
from line 2.
Opening and back
seating valve 1
isolates gage #7
from line 2.
RA-0001
The dry bulb room
temperature is
controlled by a hot
water reheater
RA-0009
The reheaters are
The supply fan
not used when in the discharges directly
cooling mode
into a chilling unit for
the final stage of air
temperature
modulation
RA-0001
Book Num
Ans
11
4072
C
11
4073
B
11
4074
A
11
11
4075
4076
A
D
11
4078
B
11
4079
C
11
4080
B
11
4081
D
11
4083
D
11
4084
C
Question
Which of the following is true concerning the system
shown in the following illustration?
From the characteristics shown in the illustration, what
would be the approximate shut-off head pressure of the
centrifugal salt water pump?
Which of the devices listed is used to limit frosting of
evaporator coils on multiple box installations served by
one compressor?
If you have a duplex double acting reciprocating pump
making 160 strokes/minute with 3" diameter cylinder,
and a 4" stroke with 97% volumetric efficiency, what is
the capacity of this pump?
Answer A
The system
represents the Freon
circuit of a direct type
air conditioning unit.
Answer B
A room thermostat
controls the wet bulb
temperature of the
space.
Answer C
The air fan discharge
temperature
determines the
amount of water flow
circulating through
the cooling coils.
Answer D
Heat load will
increase by
increasing the
amount of
recirculated air.
58 psi
71 psi
130 psi
360 psi
RA-0009
GS-0138
Back pressure
control valve
Automatic expansion Capillary tube
valve
Solenoid valve
38 gpm
19 gpm
9 gpm
Which of the following characteristics is true concerning The unit does not
The correct rotation
the device shown in the illustration?
require sealing liquid. of the impeller is
counter-clockwise as
shown.
181 gpm
If you have a duplex double acting reciprocating pump 91 gpm
making 170 strokes/minute with 4" diameter cylinder,
and a 11" stroke with 89% volumetric efficiency, what is
the capacity of this pump?
25 gpm
The unit is designed The unit is designed
to pump gases.
to pump high
viscosity oil.
249 gpm
45 gpm
1/2" thick
1/2" thick
3/4" thick
3/4" thick
1" thick
1" thick
According to Title 33 CFR, of the equipment listed
Steering gear
below, which equipment must be tested NOT more than
12 hours prior to getting underway from a U.S. port
when the voyage is to be of 48 hours or greater
duration?
A trainee is on board your vessel and will need to be
before they have
assessed in the demonstration of practical skills. Ideally received training
you should assess their skill __________.
Emergency
generator
All internal vessel
control
communications
systems
All of the above
immediately after
they have received
training
after they have
observed the skill
demonstrated once
When the temperature in a refrigerated space rises
above its normal set point, which of the listed actions
should occur FIRST?
The compressor will
start.
The solenoid valve
will open.
after they have
received training and
personally practiced
the skill
The automatic
defrost timer will
activate.
A "thirty pound" steel plate would be __________.
A "twenty pound" steel plate would be __________.
Illustr
3/8" thick
3/8" thick
The thermal
expansion valve will
close.
322
GS-0075
Book Num
11
11
11
11
11
11
4086
4088
4089
4090
4091
4092
Ans
B
Question
Answer A
If you have a duplex double acting reciprocating pump 95 gpm
making 120 strokes/minute, with a 6" diameter cylinder,
a 7" stroke and operating with 92% volumetric
efficiency, what is the capacity of this pump?
Answer B
189 gpm
Answer C
110 gpm
Answer D
47 gpm
In order to assess each trainee in the performance of a
practical demonstration, the assessor should
__________.
create a unique set
of subjective
questions for each
trainee
refer to a checklist
that represents the
skill process as
required on board
the vessel
evaluate according to
their discretion,
simply by their ability
to "tell" when a
candidate is
performing well
sign off the
remaining half of all
skills to be
demonstrated based
upon the success of
the first half of the
skill demonstration
When a ships officer signs off a trainee's successful
completion of one or more practical demonstrations,
they are attesting to the trainee's____________.
ability to perform the overall competency
practical
demonstration only
at the time the skill
was assessed
The assessment of a trainee's practical demonstration
of skills should be conducted __________.
within the normal
routine of vessel's
operation
at any time of the
day, particularly
outside normal
operations
only when the trainee
first arrives on board,
and preferably within
the first few days
A licensed officer designated to certify a trainee's
performance of a practical demonstration should sign
off when __________.
another license
officer has witnessed
the performance of
the demonstration
the majority of any
portion of the skill
has been
demonstrated
the pre-brief with the the entire practical
demonstration has
trainee has been
completed
been successfully
completed and
personally observed
by the licensed
officer
One function of the model checklists provided for the
conduct of a practical demonstration is to promote
__________.
repeatability in
observing the
assessment of the
task to be
demonstrated
a consistent standard
in the assessment of
the task to be
demonstrated
a methodology by
which elements of
the missed practical
demonstration can
pointed out to the
trainee
B
A
A
D
D
323
ability to perform the knowledge of how to
specific task not only perform the task and
nothing more
at the time of
demonstration, but
also for the future
within the last six
hours that the trainee
will be on board the
vessel
all of the above
Illustr
Book Num
11
11
11
11
4093
4094
4095
4096
Ans
C
B
B
4097
C
11
4098
A
11
4099
4101
Answer A
use each specific
checklist as it was
presented and
without deviation
Answer B
modify the checklist
to reflect the
specifics of the
equipment, systems,
and operating
parameters for the
vessel upon which
the demonstration is
being conducted
Answer C
totally disregard the
model checklist and
develop their own
based on their own
vessel standards
Answer D
all of the above
Unless designed for such operation, two compressors
should not be operated in parallel in a refrigeration
system because the __________.
operation of two
compressors will
overload the
expansion valve
the reeds should be
reground
condenser pressure
will be too high
causing condenser
failure
the reeds should be
replaced
lubricating oil may be
transferred from one
compressor to the
other
the low side pressure
will indicate below
normal
evaporator would fail
due to low suction
pressure
II only
Both I and II
Neither I nor II
62 gpm
148 gpm
37 gpm
pitching
hogging
sagging
50%
25%
0%
disassembled
component in a one
point perspective
view
parts without using
hidden lines
B
11
11
Question
When a training program provides a company and/or its
vessels the model checklists by which a trainee will be
deemed proficient, the ship's officers should
__________.
D
B
If the discharge valves used in a refrigeration
compressor are leaking badly, __________.
If a hole were to form in the division plate between
I only
stages of a flash type evaporator __________.
I. 2nd stage vacuum would increase
II. vaporization of the feed water would continue
If you have a duplex double acting reciprocating pump 74 gpm
making 130 strokes/minute, with a 6" diameter cylinder,
a 5" stroke and operating with 93% volumetric
efficiency, what is the capacity of this pump?
The result of a blow delivered by a heavy sea causing
pounding
rapid vibrations of the elastic portions of the ships hull is
identified as __________.
A refrigeration compressor used in a multi-box
100%
refrigeration system, is designed with six of its eight
cylinders able to be controlled for variable load
conditions. If all of the reefer boxes have just recently
been activated, what percentage of the total number of
compressor cylinders will be unloaded after start-up?
The exploded view of the drawing shown in the
illustration is intended to show the __________.
total number of parts parts aligned for the
in the assembled
correct order of
component
reassembly
324
Illustr
the high pressure cutout setting should be
lowered
GS-0025
Book Num
11
4102
Ans
C
11
4103
B
11
4104
C
11
4105
D
11
4106
D
11
4107
B
11
4108
C
11
11
4110
4111
D
D
Question
While on watch, you notice that a significant amount of
water is flowing out of the packing box from a
centrifugal salt water pump which had been recently
overhauled. You tighten the packing gland evenly by
nearly a half inch, yet the amount of water output from
the packing box does not diminish. You should
__________.
Answer A
make no further
adjustments and
continue to make a
round of the engine
room
Answer B
take up evenly on the
packing gland nuts
another 2 or 3 full
turns
Answer C
back off on the nuts
by the same amount
to prevent scoring of
the shaft sleeve and
notify the next watch
of the condition
Answer D
shut off the sealing
line valves to
diminish the outflow
of water from the
packing box
In the hydraulic anchor windlass system illustrated,
replenishment pump fluid flow is provided to the main
system for automatic replenishment and to
__________.
release the spring
brake
provide actuating
fluid flow to the
horsepower torque
limiter
shift valve "L" to line move stored oil
up the fluid motor
across the indicated
relief valve
filter to maintain the
oil in a water free
condition
A thermal expansion valve installed in a refrigeration
system is controlled by __________.
The barge shown in the illustration is 40' X 20' X 10' and
weighs 22.8 long tons when empty. What would be the
maximum amount of cargo that may be loaded on the
barge in salt water so that the maximum draft does not
exceed 8 feet.
While on watch, you notice that a significant amount of
water is flowing out of the packing box from a
centrifugal salt water pump which had been recently
overhauled. You tighten the packing gland evenly by
nearly a half inch, yet the amount of water output from
the packing box does not diminish. You should
__________.
the solenoid valve
energizing coil
100 long tons
regulating the king
valve
120 long tons
a thermal bulb on the an electrically
evaporator coil
operated controller
140 long tons
160 long tons
Illustr
GS-0160
GS-0157
take up evenly on the
packing gland nuts
another 2 or 3 full
turns
shut off the seal line change over to the
stand-by pump and
valves to diminish
the outflow of water inform the next watch
from the packing box
The ball float shown in the illustration is 9 inches in
6.6 pounds
diameter, with an effective float arm of 27 inches and
floats in a liquid with a specific gravity of 1.0. If the
distance "L" equals 9 inches, what will be the force
available at point "X"?
At what temperature would the reading on the
16 degrees above
Fahrenheit scale and the Centigrade scale be identical? zero
20.1 pounds
28.2 pounds
32 degrees below
zero
40 degrees below
zero
64 degrees below
zero
The stud and nut pictured just below "B" is used to
__________.
hold the impeller
onto the shaft
maintain the two
shaft sections
together during
rotation
87 gpm
hold the packing
gland in place
make no further
adjustments and
continue to make a
round of the engine
room
prevent the shaft
sleeve from sliding
If you have a duplex double acting reciprocating pump 44 gpm
making 150 strokes/minute, with a 6" diameter cylinder,
a 4" stroke and operating with 95% volumetric
efficiency, what is the capacity of this pump?
325
43.5 pounds
GS-0158
73 gpm
140 gpm
GS-0129
Book Num
11
11
4113
4115
Ans
C
B
11
4116
B
11
4117
B
11
4118
D
11
4119
A
11
4120
D
11
4121
C
11
4122
A
11
4123
C
11
4125
C
11
4126
D
Question
Answer A
A temperature reading of 72 degrees on the Fahrenheit 18 degrees
scale would correspond to what temperature on the
centigrade scale?
If you have a duplex double acting reciprocating pump 132 gpm
making 160 strokes/minute, with a 6" diameter cylinder,
a 14" stroke and operating with 96% volumetric
efficiency, what is the capacity of this pump?
Answer B
20 degrees
Answer C
22 degrees
Answer D
24 degrees
526 gpm
263 gpm
614 gpm
Which of the following statements is true concerning the Maximum efficiency
pump characteristics shown in the illustration?
is achieved when the
pump is operating at
a capacity of
approximately 900
GPM
Operating the pump
at a capacity of 1600
GPM would require
approximately 60
horsepower
When operating at a All of the above
160 foot discharge
head, the pump is
running at maximum
efficiency
Which of the filters listed will deplete the additives in
Abundant filter
lubricating oil?
672 gpm
If you have a duplex single acting reciprocating pump
making 100 strokes/minute, with a 7" diameter cylinder,
a 13" stroke and operating with 90% volumetric
efficiency, what is the capacity of this pump?
Adsorbent filter
Cloth bag extractor
97 gpm
390 gpm
Which of the filters listed will deplete the additives in
lubricating oil?
If your vessel burns 3 tons of fuel per hour at 19 knots,
how many tons per hour will it burn at 15 knots?
Adsorbent filter
Cloth bag extractor
Fine wire mesh
5.3 tons
2.4 tons
1.9 tons
Extended area
membrane filter
1.5 tons
Which of the filters listed will deplete the additives in
Fine copper screen
lubricating oil?
If you have a duplex double acting reciprocating pump 108 gpm
making 120 strokes/minute, with a 6" diameter cylinder,
a 4" stroke and operating with 92% volumetric
efficiency, what is the capacity of this pump?
Extended area
membrane filter
54 gpm
Adsorbent filter
Cloth bag extractor
36 gpm
27 gpm
Energy existing in a system as a result of the relative
velocities of the objects is defined as __________.
potential energy
pressure energy
kinetic energy
relative energy
Mechanical energy in transition is referred to as
__________.
Using the device shown in the illustration, which of the
following statements is true when adding a charge to a
refrigeration system?
enthalpy
heat
work
velocity
Fitting #3 should be
connected to the
refrigerant cylinder.
Fitting #2 should be
connected to the
system low side.
Fitting #4 should be
connected to the
system high side.
All of the above.
326
Illustr
GS-0138
Extended area
membrane filter
195 gpm
RA-0001
Book Num
11
4127
Ans
D
Question
Answer A
Answer B
Machinery with ball bearings designed to be filled with the bearing does not dirt and grit are
grease should have the relief plug temporarily removed shift position on the flushed from the
while grease is being added. This plug should remain
shaft
bearing housing
out until the machinery has been operated and
sufficiently warmed up to ensure that __________.
Answer C
all air pockets are
vented from the
grease
Answer D
all excess grease is
expelled from the
housing
Theoretically, if the "B" end of the hydraulic
transmission illustrated were provided with a variable
position tilting box, and the "A" end displacement were
to be constant, the __________.
speed output of the
"B" end would
decrease in
proportion as the
tilting box would
approach zero stroke
available horsepower
at the "B" end would
increase in
proportion as the
tilting box would
approach zero stroke
available torque at
the "B" end would
increase in
proportion to the
increasing angle of
the "B" end tilt box
speed output of the
"B" would increase in
proportion to
increasing the "B"
end tilting box angle GS-0057
What is the reading of the vernier micrometer caliper
scale shown in figure "E" in the illustration?
0.2997 inch
0.3007 inch
0.3017 inch
0.3107 inch
0.301 inch
0.324 inch
0.349 inch
0.351 inch
Critical point heat
Sublimation heat
Sensible heat
Latent heat
The amount of
detergent additives
has decreased.
The viscosity of the The alkalinity of the
oil has increased in oil has decreased.
addition to a decided
rise in the
neutralization
number.
The neutralization
number has
decreased below
minimum levels.
If you have a duplex double acting reciprocating pump 82 gpm
making 130 strokes/minute, with a 5" diameter cylinder,
a 8" stroke and operating with 93% volumetric
efficiency, what is the capacity of this pump?
164 gpm
132 gpm
41 gpm
A compound gage is used for measuring pressures
both above and below __________.
The angle "A" shown on the illustrated lathe tool bit is
properly called the __________.
The angle "D" shown on the illustrated lathe tool bit is
properly called the __________.
The angle "B" shown on the illustrated lathe tool bit is
properly called the __________.
The angle "C" shown on the illustrated lathe tool bit is
properly called the __________.
absolute pressure
latent pressure
flow pressure
working relief angle
side relief angle
side rake angle
atmospheric
pressure
nose angle
working relief angle
side relief angle
side rake angle
nose angle
working relief angle
side relief angle
side rake angle
nose angle
working relief angle
side relief angle
side rake angle
nose angle
11
4128
C
11
4129
D
11
4130
C
11
4131
C
The reading on the micrometer scale shown in figure
"C" in the illustration is __________.
Which of the following terms is used to indicate that
additional BTU's will result in a temperature change?
B
A decision has been made to change out the lube oil in
a vessel's main propulsion unit ahead of the scheduled
maintenance period. Which of the following statements
is true concerning the reason for this decision?
11
4132
11
4133
B
11
4134
D
11
4136
D
11
4137
A
11
4138
C
11
4139
B
Illustr
GS-0091
327
GS-0013
GS-0164
GS-0164
GS-0164
GS-0164
Book Num
Ans
11
4140
D
11
4144
D
11
11
11
11
11
4145
4151
4153
4155
4156
C
A
A
D
D
11
4157
B
11
4158
A
11
4159
C
Question
Answer A
The function of the hydraulic telemotor transmitter used transmit the rudder
in an electro-hydraulic steering gear system is to
angle to the bridge
__________.
indicator
Answer B
prevent the control
linkage from striking
the stops when hard
over
blue
white
green
If you have a duplex double acting reciprocating pump 84 gpm
making 120 strokes/minute, with a 5" diameter cylinder,
a 9" stroke and operating with 92% volumetric
efficiency, what is the capacity of this pump?
152 gpm
169 gpm
42 gpm
If you have a duplex double acting reciprocating pump 95 gpm
making 120 strokes/minute, with a 5" diameter cylinder,
a 5" stroke and operating with 93% volumetric
efficiency, what is the capacity of this pump?
38 gpm
30 gpm
15 gpm
If you have a duplex single acting reciprocating pump
78 gpm
making 180 strokes/minute, with a 4" diameter cylinder,
a 9" stroke and operating with 89% volumetric
efficiency, what is the capacity of this pump?
176 gpm
39 gpm
157 gpm
If you have a duplex double acting reciprocating pump 149 gpm
making 120 strokes/minute, with a 6" diameter cylinder,
a 11" stroke and operating with 92% volumetric
efficiency, what is the capacity of this pump?
273 gpm
74 gpm
297 gpm
If the high side pressure of a R-134A refrigeration
system is maintained at approximately 124 psig in the
system receiver, which of the listed values would
approximately represent its saturation temperature?
5° F
20° F
50° F
100° F
An orifice-check valve placed in a hydraulic system is
used to __________.
regulate the fluid flow restrict movement of allow free movement allows only a
in either direction
hydraulic fluid in one of hydraulic fluid in
restricted fluid flow in
direction, but allow
both directions
one direction
free movement in the
other direction
From the illustration shown, what would be the normal
procedure to make adjustments to angle "E"?
Rock the tool holder
on its base.
Remove the tool bit
and regrind.
Structural members used to support and transmit the
downward force of the load and distribute that force
over a large area, are called __________.
stringers
gussets
When you find a small refrigerant leak with a halide
torch, the color of the torch flame will be __________.
orange
Answer C
Answer D
automatically purge send hydraulic
all entrained air from signals to the
the system
receiving unit
Illustr
RA-0023
328
Extend or retract the Use the Tailstock
tool bit in the tool
Offset method.
holder.
stanchions
all of the above
GS-0164
Book Num
Ans
11
4161
B
11
4162
A
11
11
11
11
4164
4165
4166
4167
D
B
A
B
Question
Answer A
If you have a simplex single acting reciprocating pump 83 gpm
making 160 strokes/minute, with a 4" diameter cylinder,
a 5" stroke and operating with 95% volumetric
efficiency, what is the capacity of this pump?
Answer B
21 gpm
Answer C
41 gpm
Answer D
52 gpm
The propeller blade pitch angle change is caused by
axial movement of what component in the hub body
assembly?
A purge recovery system is used in a centrifugal air
conditioning or refrigeration system to __________.
The sliding block.
The crankpin ring.
The internal ring
gear.
If you have a duplex single acting reciprocating pump
72 gpm
making 110 strokes/minute, with a 5" diameter cylinder,
a 7" stroke and operating with 79% volumetric
efficiency, what is the capacity of this pump?
52 gpm
26 gpm
purge
noncondensable
gases without losing
refrigerant
103 gpm
If you have a duplex double acting reciprocating pump 158 gpm
making 130 strokes/minute, with a 4" diameter cylinder,
a 12" stroke and operating with 93% volumetric
efficiency, what is the capacity of this pump?
79 gpm
237 gpm
39 gpm
The hub purge valve serves to relieve pressure in the
forward chamber of the servomotor cylinder in a CPP
system when what situation occurs?
The propeller is
stroked beyond its
full ahead pitch
limits.
provide extra oil for
maintaining the
normal sump level
The propeller is
stroked beyond its
full astern limits.
During periods thrust During periods of
loading.
high-pressure oil
surge.
prevent seawater
from entering the
hydraulic system
when it is secured
provide static head
pressure for
maintaining proper
control oil pressure
signal timing input
signal polarity input
feedback timing.
The function of the head tank on a CPP system is to
__________.
11
11
11
11
4168
4169
4171
4172
B
B
D
D
The crosshead.
The direction in which the control oil servo valve opens
and directs control oil to the oil distribution (OD) box
piston in a CPP system is determined by the command
__________.
As shown in the illustration, if the "TOP VIEW" of an
orthographic projection is indicated by figure "19", and
the "FRONT VIEW" is indicated by figure "23", which
figure would best represent the correct "RIGHT SIDE
VIEW"?
If you have a duplex double acting reciprocating pump
making 230 strokes/minute with 4" diameter cylinder,
and a 7" stroke with 78% volumetric efficiency, what is
the capacity of this pump?
purge lube oil from
the liquid refrigerant
recover water purged separate foul gases
from the system
from the receiver
Illustr
GS-0172
GS-0172
provide dynamic
head pressure for
maintaining proper
high-pressure oil
pressure
feedback polarity
GS-0170
Figure "17"
Figure "12"
Figure "3"
Figure "8"
GS-0165
68 gpm
329
120 gpm
34 gpm
137 gpm
Book Num
11
11
11
11
11
4173
4174
4175
4176
4177
Ans
B
C
C
B
B
11
4178
A
11
4179
B
11
4181
D
11
4182
C
11
4184
B
11
4185
D
11
4186
C
Question
Answer A
A micrometer scale reading is indicated as 0.137 inches Figure D
and is represented in the illustration by __________.
Answer B
Figure E
Answer C
Figure F
Answer D
Figure I
GS-0013
Double trunk pistons are used in some refrigeration
compressors to reduce refrigerant boil off by
__________.
increasing
producing higher
compressor
compression
volumetric efficiency pressures
As shown in the illustration, if the "TOP VIEW" of an
orthographic projection is indicated by figure "1", and
the "FRONT VIEW" is indicated by figure "9", which
figure would best represent the correct "RIGHT SIDE
VIEW"?
As shown in the illustration, if figure "21" indicates the
"TOP VIEW" of an orthographic projection, and figure
"11" indicates the "FRONT VIEW", which figure would
best represent the correct "RIGHT SIDE VIEW"?
Figure "13"
Figure "6"
minimizing free
contact between
refrigerant and oil in
the crankcase
Figure "20"
eliminating the need
for a shaft seal
Figure "5"
GS-0165
Figure "2"
Figure "10"
Figure "8"
Figure "15"
GS-0165
If you have a duplex double acting reciprocating pump 69 gpm
making 160 strokes/minute, with a 5" diameter cylinder,
a 6" stroke and operating with 85% volumetric
efficiency, what is the capacity of this pump?
139 gpm
83 gpm
35 gpm
As shown in the illustration, if the "TOP VIEW" of an
orthographic projection is indicated by figure "12", and
the "FRONT VIEW" is indicated by figure "3", which
figure would best represent the correct "RIGHT SIDE
VIEW"?
Flux is used when soldering, in order to __________.
Figure "23"
Figure "9"
Figure "8"
In the circle illustrated, the circumference is 48.62 feet.
What is the area of the shaded portion?
An additive used to improve the ability of a lube oil to
reduce friction in hypoid gear applications is known as
a/an __________.
Which of the following statements is true concerning the
use of dehydrators in refrigeration systems?
Illustr
Figure "17"
GS-0165
decrease the melting decrease the surface ensure proper tinning control the soldering
point of the solder
tension of the solder
iron temperature
14.1 square feet
16.1 square feet
17.1 square feet
suppressant additive dispersant additive
extreme pressure
additive
viscosity improver
additive
Dehydrators must be Dehydrators are
used continuously.
usually installed in
the liquid line.
Dehydrators are
Dehydrators are
used when pumping used when purging
down the system.
the system.
The energy associated with atoms forming molecules is kinetic energy
known as __________.
Which lathe tool shown in the illustration would best be P
used on a work piece to perform a left hand facing
operation?
330
15.1 square feet
potential energy
mechanical energy
chemical energy
V
Q
R
GS-0134
GS-0090
Book Num
11
4187
Ans
A
11
4188
C
11
4189
B
11
4190
D
11
4191
C
11
4192
A
11
4193
B
11
4194
D
11
4195
B
11
4196
A
11
4197
D
11
11
4198
4199
D
D
Question
Answer A
What is the reading of the vernier caliper scale shown in 3.890 inch
figure "A" in the illustration?
If you have a simplex single acting reciprocating pump 226 gpm
making 130 strokes/minute, with a 5" diameter cylinder,
a 11" stroke and operating with 93% volumetric
efficiency, what is the capacity of this pump?
Answer B
3.915 inch
Answer C
4.215 inch
Answer D
4.890 inch
Illustr
113 gpm
57 gpm
249 gpm
Bronze metal is an alloy composed mainly of
__________.
Monel metal is an alloy composed mainly of
__________.
Brass metal is an alloy composed mainly of
__________.
Stainless steel is an alloy composed mainly of
__________.
What would be the result of throttling the suction valve
to the point where the flow was less than that
recommended by a centrifugal pump?
I. The designed total net head would be reduced.
II. The pump would begin to cavitate.
A measurement of .2344 inches is equal to
__________.
If you have a duplex single acting reciprocating pump
making 150 strokes/minute, with a 7" diameter cylinder,
a 9" stroke and operating with 95% volumetric
efficiency, what is the capacity of this pump?
copper and zinc
copper and tin
tin and lead
iron and copper
copper and tin
bronze and tin
zinc and copper
nickel and copper
tin and zinc
copper and tin
copper and zinc
silicon and lead
chromium and steel
iron and steel
copper and steel
brass and steel
I only
II only
Both I and II
Neither I nor II
11/32 inches
15/32 inches
11/64 inches
15/64 inches
275 gpm
214 gpm
107 gpm
427 gpm
The device shown in the illustration is known as a/an
__________.
The rupture disc on a low pressure centrifugal
refrigeration unit is used as an over pressure protection
device for the __________.
As shown in the illustration, if the "TOP VIEW" of an
orthographic projection is indicated by figure "13", and
the "FRONT VIEW" is indicated by figure "15", which
figure would best represent the correct "RIGHT SIDE
VIEW"?
If you have a simplex single acting reciprocating pump
making 130 strokes/minute with a 3" diameter cylinder,
a 10" stroke and operating with 93% volumetric
efficiency, what is the capacity of this pump?
viscosimeter
flow meter
economizer
condenser
Reid vapor pressure Pensky-Martens cup
GS-0069
analyzer
compressor
chiller barrel
Figure "11"
Figure "16"
Figure "2"
GS-0092
Figure "15"
GS-0165
74 gpm
331
37 gpm
123 gpm
18 gpm
Book Num
11
11
11
11
11
11
4200
4201
4203
4204
4205
4206
Ans
A
A
C
A
A
C
11
4207
B
11
4208
B
11
11
4209
4210
C
B
Question
Answer A
If you have a simplex single acting reciprocating pump 19.8 gpm
making 150 strokes/minute, with a 4" diameter cylinder,
a 6" stroke and operating with 81% volumetric
efficiency, what is the capacity of this pump?
Answer B
39.7 gpm
Answer C
59.5 gpm
Answer D
79.4 gpm
Regarding the hydraulic hose installation illustrated, the will expand under
hose __________.
pressure to the left of
center with flow from
left to right
will expand under
pressure to the right
of center with flow
from left to right
is properly installed
can pull away from
the right hand pipe
fitting with flow from
left to right
If you have a duplex single acting reciprocating pump
154 gpm
making 150 strokes/minute, with a 7" diameter cylinder,
a 13" stroke and operating with 95% volumetric
efficiency, what is the capacity of this pump?
165 gpm
309 gpm
When a refrigerated space reaches the desired
temperature in a multi-box refrigeration system, which
of the listed actions will occur FIRST?
The solenoid valve
will close.
If you have a simplex single acting reciprocating pump 24 gpm
making 180 strokes/minute, with a 4" diameter cylinder,
a 5" stroke and operating with 96% volumetric
efficiency, what is the capacity of this pump?
As shown in the illustration, if the "TOP VIEW" of an
orthographic projection is indicated by figure "15", and
the "FRONT VIEW" is indicated by figure "18", which
figure would best represent the correct "RIGHT SIDE
VIEW"?
As shown in the illustration, if the "TOP VIEW" of an
orthographic projection is indicated by figure "2", and
the "FRONT VIEW" is indicated by figure "21", which
figure would best represent the correct "RIGHT SIDE
VIEW"?
Which of the figures illustrated correctly identifies the
position of the journal shortly after it has begun to
rotate?
The relative humidity is 50% and the dry bulb
temperature is 90° F. Using the information shown in
the illustration, determine the difference between the
dew point and wet bulb temperature.
The relative humidity is 30% and the dry bulb
temperature is 90° F. Using the information shown in
the illustration, determine the difference between the
dew point and wet bulb temperature.
Figure "5"
Illustr
GS-0064
325 gpm
The expansion valve The low pressure
The high pressure
cutout switch will
will open.
cutout switch will
stop the compressor. stop the compressor.
94 gpm
47 gpm
59 gpm
Figure "6"
Figure "10"
Figure "16"
GS-0165
Figure "3"
Figure "2"
Figure "17"
Figure "8"
GS-0165
A
B
C
D
GS-0121
2° F
4° F
6° F
12° F
RA-0021
6.5° F
12.5° F
54.8° F
67.3° F
RA-0021
332
Book Num
11
4211
Ans
D
11
4213
B
11
4214
B
11
11
11
11
4215
4216
4217
4218
B
Question
Answer A
If you have a duplex double acting reciprocating pump 30 gpm
making 170 strokes/minute, with a 4" diameter cylinder,
a 7" stroke and operating with 92% volumetric
efficiency, what is the capacity of this pump?
Answer B
55 gpm
Answer C
104 gpm
Answer D
119 gpm
If you have a simplex single acting reciprocating pump 43 gpm
making 180 strokes/minute, with a 3" diameter cylinder,
a 4" stroke and operating with 97% volumetric
efficiency, what is the capacity of this pump?
11 gpm
21 gpm
28 gpm
In a water-cooled refrigeration system, the condenser
temperature of the
cooling water regulating valve is controlled by
cooling water
__________.
113 gpm
If you have a duplex single acting reciprocating pump
making 150 strokes/minute, with a 6" diameter cylinder,
a 13" stroke and operating with 95% volumetric
efficiency, what is the capacity of this pump?
refrigerant pressure
227 gpm
amount of refrigerant temperature of the
in the system
refrigerant after
compression
453 gpm
491 gpm
Which one of the following statements describes the
throttling characteristics of a typical globe valve?
The first third of the
valve disk travel in
the open direction
will result in
approximately onethird of full flow rate.
The first third of valve
disk travel in the
open direction will
produce a smaller
increase in flow rate
than the last third of
valve disk travel.
The first third of valve
disk travel in the
open direction will
produce a greater
increase in flow rate
than the last third of
valve disk travel.
The first two-thirds of
valve disk travel in
the open direction
will produce
approximately the
same increase in
flow rate as the last
third of valve disk
travel.
When comparing globe valves to gate valves, globe
valves:
are less effective at
throttling flow.
are less effective as
pressure regulating
valves
produce a smaller
pressure decrease
when fully opened.
C
D
B
11
4219
C
11
4220
D
are more effective at require more force to
throttling flow.
open against large
differential
pressures.
To "verify" the position of a fully opened manual valve in in the open direction to fully close the
an operating system, the operator should operate the
until the valve is back valve, then open the
valve hand wheel __________.
seated one-half turn valve to the fully
open position.
produce a larger
pressure decrease
when fully open.
require less force to
open against large
differential
pressures.
are more effective as
pressure regulating
valves.
in the closed
direction, then open
the valve to its
previously open
position.
to open the valve
until it touches the
backseat, then close
the valve to the
desired position.
The reading indicated on a vernier micrometer caliper
scale is .2470 inches. Which of the figures in the
illustration represents this reading?
Figure F
Figure G
When comparing gate valves to globe valves, gate
valves __________.
Figure A
Figure E
Illustr
GS-0083
333
Book Num
11
4221
Ans
B
11
4222
C
11
4223
D
11
11
11
4224
4225
4226
C
C
B
Question
Assuming oil and water flow rates remain the same,
what would be the effect of scale formation occurring on
the inside of the cooling water tubes of a lube oil heat
exchanger?
Answer A
Water temperature
outlet temperature
will decrease and the
lube oil temperature
will decrease.
Answer B
Water temperature
outlet temperature
will decrease and the
lube oil temperature
will increase.
Answer C
Water temperature
outlet temperature
will increase and the
lube oil temperature
will decrease.
Answer D
Water temperature
outlet temperature
will increase and the
lube oil temperature
will increase.
Tube scaling in heat exchangers causes the heat
transfer rate to decrease because the __________.
surface area of the
tube decreases
cooling fluid outlet
temperature
decreases
thermal conductivity
of the scale is very
low
flow through the heat
exchanger becomes
more turbulent
What is the reading of the vernier micrometer caliper
scale shown in figure "F" in the illustration?
When multiple refrigeration evaporators are served by
the same compressor and operate at different
temperatures, the pressure in the coldest evaporator is
__________.
If you have a simplex single acting reciprocating pump
making 130 strokes/minute, with a 6" diameter cylinder,
a 7" stroke and operating with 96% volumetric
efficiency, what is the capacity of this pump?
0.6153 inch
0.6203 inch
0.6253 inch
0.6383 inch
higher than the
the same as any
pressure in warmest evaporator in the
evaporator
system
lower than the
pressure in the
warmest evaporator
controlled by
adjusting the thermal
expansion valve
207 gpm
53 gpm
21 gpm
The position of the
valve can only be
determined locally
during manual
control.
Relief valves are
capable of being
gagged whereas
safety valves are not.
The valve can only
be operated locally
during manual
control.
Why must an operator pay particular attention to an
Manual valve control
auto/manual valve controller when it is placed in manual is not as stable as
automatic valve
mode?
control.
Which one of the following is a difference between a
typical relief valve and a typical safety valve?
11
4228
B
11
4229
D
11
4230
C
104 gpm
Valve position will no
longer change in
response to changes
in system
parameters.
The actuator closing A relief valve
spring on a relief
gradually opens as
valve is in a
pressure increases
compressed state
above set point
whereas the actuator pressure whereas a
closing spring on a
safety valve fully
safety valve acts in opens at the set
tension.
point pressure.
The blowdown of a
relief valve is greater
than the blowdown of
a safety valve.
A safety valve with a 2-inch diameter disk has a
95 psig
compressed spring applying 2,400 pounds of force to
the top of the valve disk in opposition to system
pressure. Which one of the following is the approximate
system pressure at which the safety valve will open?
191 psig
382 psig
764 psig
Rapid wear on the extreme outer corners to the cutting
edges of a drill bit is the result of the drill having
__________.
not enough cutting
speed
too much clearance
angle
not enough margin
width
insufficient feed
pressure
334
Illustr
GS-0083
Book Num
11
11
4231
4232
Ans
B
C
11
4233
C
11
4235
B
11
4236
D
11
4237
C
11
4238
B
11
4239
C
11
4240
B
11
4241
A
11
4244
D
11
4246
B
Question
In the hydraulic anchor windlass system illustrated,
replenishment pump fluid flow is provided to the main
system for automatic replenishment and to
__________.
The running unloader of the device shown in the
illustration operates by __________.
If you have a duplex single acting reciprocating pump
making 150 strokes/minute, with a 6" diameter cylinder,
a 14" stroke and operating with 95% volumetric
efficiency, what is the capacity of this pump?
Answer A
release the spring
brake
Answer B
Answer C
Answer D
Illustr
provide actuating
shift valve "L" to line provide actuating
fluid flow to the main up the fluid motor
fluid flow to the winch
GS-0160
pump tilt box control relief valve
motor tilt box control
temporarily
discharging the
compressed air to
the atmosphere
122 gpm
holding open the
high pressure stage
reed-type suction
valves
488 gpm
throttling a butterfly
valve located in the
compressor suction
line
244 gpm
570 gpm
0.025 inch
0.100 inch
0.250 inch
74 gpm
62 gpm
37 gpm
any rating forming
part of the watch
the vessel owner
any licensed officer
at the management
level
All of the above
Pressure reducing
valve
Counterbalance
valve
Unloading valve
Sequence valve
1.75
2.75
3.75
4.75
29.4
39.4
49.4
59.4
2.2
3.2
4.2
5.2
Forced draft fan
Induced draft fan
Fuel oil transfer
pump
All of the above
assist in
synchronizing
generators
measure the speed
of a rotating shaft
test for condensate
conductivity
measure brine
density
One turn of the micrometer barrel will linearly move the 0.001 inch
spindle __________.
If you have a simplex single acting reciprocating pump 148 gpm
making 130 strokes/minute, with a 6" diameter cylinder,
a 5" stroke and operating with 93% volumetric
efficiency, what is the capacity of this pump?
If a specifically trained and qualified person is NOT on
board a vessel to assess a new officer trainees practical
demonstration or skills, the demonstration can be
conducted, when provided with guidance, and signed
off by __________.
Which component in a hydraulic system is commonly
used to prevent the stray movements of a vertical load
until required?
In terms of liquid volume, approximately how many
"Liters" equal one US "Gallon"?
In terms of linear measurement, approximately how
many "inches" equal one "meter"?
When applying weight conversion factors,
approximately how many US "pounds" equal one
"kilogram"?
Which of the following machinery remote control
shutdowns is required to be tested during each regular
inspection for certification?
The function of the device illustrated is to __________.
335
the use of an
intercooler relief
device
GS-0119
GS-0117
Book Num
Ans
Question
Answer A
If you have a simplex single acting reciprocating pump 30 gpm
making 130 strokes/minute, with a 6" diameter cylinder,
a 4" stroke and operating with 93% volumetric
efficiency, what is the capacity of this pump?
Answer B
118 gpm
on the reservoir
return line
on the relief valve
discharge line
D
Modern trends show that full flow filters used in multioperation hydraulic systems would most likely be
located __________.
Which of the following is true concerning the hose
threads on compressed gas oxy-acetylene regulators
and torches?
C
Which of the following is true concerning the hose
threads on compressed gas oxy-acetylene regulators
and torches?
The oxygen regulator
hose outlet thread
connection is "left
handed".
The acetylene
regulator hose outlet
thread connection is
"right handed".
The torch oxygen
inlet hose thread
connection is "right
handed".
The torch acetylene
inlet hose thread
connection is "right
handed".
Which of the following procedures would be correct
when first lighting-off an oxy-acetylene torch?
Open the oxygen
valve wide open and
the acetylene valve
slightly to light-off.
On a container box refrigeration system, when the
current to a suction modulating valve is increased, the
__________.
valve is moving to a
more open position
Open the acetylene
valve very slightly
and the oxygen valve
the same amount to
light-off.
temperature of the
box is increasing
Open the oxygen
valve very slightly to
light-off and then
open and adjust the
acetylene valve.
suction pressure of
the compressor will
decrease
If a centrifugal boiler feed pump operating with a
positive suction head vibrates, or becomes noisy, the
cause could be __________.
In addition to the main outermost scale on the low side
compound gage fitted to the portable service manifold,
there are often one or more other scales on the face of
the gage. These are __________.
A volume of one cubic foot would equal how many
gallons?
The device shown in the illustration is commonly
referred to as a __________.
Cracks may be prevented from developing at the
corners of welded plating inserts by __________.
If you have a simplex single acting reciprocating pump
making 150 strokes/minute, with a 6" diameter cylinder,
a 8" stroke and operating with 95% volumetric
efficiency, what is the capacity of this pump?
excessive suction
pressure
worn wearing rings
air leakage into
suction line
Open the acetylene
valve very slightly to
light-off and then
open and adjust the
oxygen valve.
amount of air flowing
through the
condenser is
decreased
insufficient flow
11
4247
A
11
4248
A
11
11
11
4249
4250
4251
D
11
4252
C
11
4253
D
11
4254
D
11
4255
C
11
4256
C
11
4257
B
11
4258
B
Answer C
59 gpm
between the control
valves and the
actuators
The oxygen regulator The acetylene
The torch oxygen
hose outlet thread
regulator hose outlet inlet hose thread
connection is "left
thread connection is connection is "left
handed".
"right handed".
handed".
Answer D
39 gpm
on the reservoir fill
line
The torch acetylene
inlet hose thread
connection is "left
handed".
pressure scales for pressure scales for
different refrigerants varying ambient
temperatures
temperature scales
for varying ambient
pressures
temperature scales
for different
refrigerants
5.48 gallons
7.48 gallons
8.48 gallons
6.48 gallons
hydraulic steering
multistage ballast
rotary lobe type air
gear pump
pump
compressor
squaring the corners rounding the corners plug welding the
corners
279 gpm
70 gpm
140 gpm
336
Illustr
control air dehydrator
slot welding the
corners
186 gpm
GS-0119
Book Num
Ans
11
4259
D
11
4260
C
11
4261
D
11
4262
C
11
4263
B
11
4264
C
11
4265
A
11
4266
A
11
4267
D
11
4268
C
11
4269
C
11
4270
B
11
4271
D
11
4272
A
Question
Answer A
In accordance with Coast Guard Regulations (46 CFR), one voyage only
a steam propelled cargo vessel over 25 gross tons may
have a Certificate of Inspection issued for __________.
Answer B
a specific period of
time to cover a
described situation
Answer C
a time period not
exceeding 5 years
The gas that exists in the stratosphere that helps to
protect the environment from ultraviolet radiation is
called __________.
What is the chemical in CFC refrigerant that destroys
stratospheric ozone?
Stratospheric ozone gas found in the atmosphere is a
chemical compound composed of __________.
radon
oxygen
ozone
Answer D
all of the above,
depending upon the
pertinent
circumstances
nitrogen
fluorine
carbon
hydrogen
chlorine
one oxygen atom
two oxygen atoms
three oxygen atoms
four oxygen atoms
What is the physical state of refrigerant as it enters the subcooled liquid
superheated vapor
condenser of a typical refrigeration system.
At which of the following intervals must the cargo pump Prior to each fuel
At least once each
relief valves on tank vessels be tested?
discharge operation. voyage.
subcooled vapor
superheated liquid
What is the physical state of refrigerant as it leaves a
receiver in a typical refrigeration system ?
R-134A is normally the replacement for which older type
of refrigerant?
The "Tare Weight" of a refrigerant storage cylinder
refers to __________.
At least once a year. At each biennial
inspection.
subcooled liquid
superheated liquid
subcooled vapor
superheated vapor
R-12
R-22
R-11
R-123
the weight of the
cylinder with its
current contents
If a block and tackle arrangement were rigged as shown 57 lbs.
in figure "D" in the illustration, the amount of force "P"
required to hold the 383 pound load stationary would be
__________. (See illustration GS-0110)
the maximum weight the total weight of a the weight of an
of the refrigerant
fully charged cylinder empty cylinder
charge
77 lbs.
128 lbs.
153 lbs.
If you have a simplex single acting reciprocating pump 118 gpm
making 130 strokes/minute, with a 4" diameter cylinder,
a 9" stroke and operating with 93% volumetric
efficiency, what is the capacity of this pump?
59 gpm
30 gpm
133 gpm
Which of the following substances is normally classified R-12
as a low pressure refrigerant?
What is the color coding for a storage container of Rgreen
134A refrigerant?
Which of the following refrigerants is Chlorine free and R-134A
safe regarding atmospheric Ozone depletion?
R-123
R-22
R-134A
grey
purple
light blue
R-12
R-22
R-11
337
Illustr
GS-0110
Book Num
11
11
4273
4274
Ans
D
11
4276
D
B
11
4278
C
11
4279
D
11
4280
D
11
4281
B
11
4282
B
11
4283
B
11
4284
Answer B
a self contained
breathing apparatus
(SCBA) would be
required before
entering the space
Watertight doors on cargo vessels must be examined
and tested by a Coast Guard inspector __________.
at each inspection for at each cargo gear
certification
inspection
within 12 hours prior at all fire and boat
to any international drills
voyage of 48 hours
or more
A "hydroscopic" lubricant used in refrigeration
compressors would have the characteristic of
__________.
losing its lubrication
qualities at higher
temperatures
being highly toxic
decreasing in
viscosity at low
temperatures
having a high affinity
for water which
requires it to be kept
in a sealed container.
What is the physical state of refrigerant leaving the
condenser of a R-22 refrigeration system?
Why can CFC or HCFC refrigerants leaking into a
confined space or in limited surroundings cause
suffocation ?
low pressure liquid
low pressure vapor
high pressure vapor
high pressure liquid
Refrigerants lighter
than air will rise.
Refrigerants
obnoxious odor
prevents breathing.
A
4275
4277
Answer A
safety goggles and
lined butyl gloves
would be required
before entering the
space
B
11
11
Question
If there is a "large" release of refrigerant gas in a
confined area, __________.
D
Refrigerants contain Refrigerants are
an acidic substance. heavier than air and
displace oxygen.
Why do low pressure refrigerant chillers usually require They normally
purge units ?
operate below
atmospheric
pressure.
The purge unit of a low pressure refrigeration chiller
rupture disk
draws gas from the __________.
If you have a simplex single acting reciprocating pump 226 gpm
making 130 strokes/minute, with a 5" diameter cylinder,
a 11" stroke and operating with 93% volumetric
efficiency, what is the capacity of this pump?
What is the short term replacement for R-11 refrigerant,
used in low pressure chillers?
Why would one use refrigerant vapor rather than liquid,
to initially charge a low pressure air conditioning chiller
unit?
The recovery of refrigerant from refrigerant oil can be
maximized by __________.
According to Coast Guard Regulations (46 CFR), a
single steel hull cargo vessel operating exclusively in
freshwater, shall be dry-docked, or hauled out, at
intervals not to exceed __________.
Answer C
an explosive
atmosphere would
be created
Answer D
dust or particle
masks would be
required before
entering the space
They draw in air
Either A or B
through gaskets and
seals.
Neither A nor B
suction of the
compressor
113 gpm
evaporator
top of the condenser
249 gpm
57 gpm
R-22
R-123
R-500
R-134A
To prevent a safety
shut down
To prevent the water To keep pressure at
coil from freezing
a minimum
removing the oil
heating the oil
1 year
2 years
338
prolonged
evacuation
3 years
To protect the
Thermal Expansion
Valve
all of the above
5 years
Illustr
Book Num
11
4285
Ans
D
11
4286
A
11
4287
B
11
4288
D
11
4289
A
11
4290
A
11
4291
A
11
4292
B
11
4293
A
11
4294
D
11
4295
C
11
4296
A
Question
Answer A
What condition may cause excessive superheat to
High head pressure
occur at the evaporator outlet of an air conditioning
system?
If a block and tackle arrangement were rigged as shown 81 lbs.
in figure "F" in the illustration, the amount of force "P"
required to hold the 324 pound load stationary would be
__________. (See illustration GS-0110)
Answer B
A dirty condenser
Answer C
Insufficient air flow
Answer D
Low refrigerant
charge
108 lbs.
116 lbs.
130 lbs.
Most of the liquid refrigerant to be removed from a
system during a refrigerant recovery procedure, would
be found in the __________.
What is the physical state of refrigerant entering the
receiver of a refrigeration system?
Which best defines a "Type I" small refrigeration
appliance according to the EPA regulations Section
608?
condenser
receiver
hoses and lines
evaporator
superheated low
pressure vapor
systems
manufactured and
hermetically sealed
having a capacity of
five pounds (2.27 kg)
or less of refrigerant
superheated high
pressure vapor
refrigerators,
freezers, room air
conditioners and
central air
conditioners
subcooled low
pressure liquid
any appliance
charged with less
than ten pounds
(4.54 kg) of
refrigerant
subcooled high
pressure liquid
any appliance
charged with less
than two pounds
(0.91 kg) of
refrigerant
The physical state of refrigerant as found in the system
receiver would be defined as a __________.
high pressure liquid
high pressure vapor
low pressure liquid
low pressure vapor
If you have a simplex single acting reciprocating pump 24 gpm
making 140 strokes/minute, with a 3" diameter cylinder,
a 12" stroke and operating with 94% volumetric
efficiency, what is the capacity of this pump?
97 gpm
48 gpm
193 gpm
Any non-condensable gases in a refrigeration system
decrease low side
will eventually accumulate and cause a/an __________. pressure
increase in the high
side pressure
decrease low side
temperature
all the above
In the circle illustrated, the circumference is 50.24 feet.
What is the area of the shaded portion?
Which of the following intervals do Coast Guard
Regulations (46 CFR) require the remote cutout for the
fuel oil service pumps to be tested?
Which of the following will speed up the recovery
process when performing maintenance on a
refrigeration system __________.
The process of recovering refrigerant from an air
conditioning or refrigeration system may be accelerated
by __________.
18.3 square feet
19.3 square feet
20.3 square feet
21.3 square feet
Prior to each sailing
Once each month
At each fire and boat At each inspection
drill