Pumpman Flashcards
1
Q
A thread die will be easier to start if the end of the shaft to be threaded is slightly
A
Chamfered.
2
Q
The thermal energy produced by an internal combustion engine is transformed into
A
Mechanical energy.
3
Q
The lengthening of a crack formed in the shell plating of a ship may be prevented by
A
Drilling a hole at each end of the crack.
4
Q
The most important reason for taking anti-seasickness pills as soon as possible after entering a life raft is to
A
Prevent loss of body moisture by vomiting.
5
Q
When fighting an oil or gasoline fire, which of the listed fire extinguishing agents should NEVER be sprayed directly into the fire?
A
Dry chemical.
6
Q
Which of the following shoring materials is a short flat block that is placed under the end of a shore for the purpose of distributing pressure?
A
Shole.
7
Q
What would be the most probable cause for a high-pressure alarm to be activated in a low-pressure CO2 fixed fire extinguishing system?
A
The tank cooling system has malfunctioned.
8
Q
If a sea water-cooled shell-and-tube lubricating oil cooler has the sea water inlet and outlet connections on the opposite end waterboxes, in terms of the number of passes, what statement is true?
A
The number of fluid passes cannot be determined.
9
Q
In the diagram illustrated, the direction of flow through item 3 is __________. Illustration GS-0125.
A
In one direction only.
10
Q
What information can be obtained from a marine chemist’s certificate on a tank barge?
A
The tanks which are safe to enter when the certificate was issued.
11
Q
The simplest method to use for determining if a centrifugal pump is operating as designed, is to
A
Close off the discharge valve, and watch for a rise in pressure.
12
Q
To find the relative humidity of an accommodation space, you would use a
A
Psychrometric Chart.
13
Q
What is a quick and effective way of determining whether or not a boiler water gauge glass is operating properly?
A
Quickly opening and then reclosing the gauge glass drain valve.
14
Q
You are making a round of the engine room and approaching the motor driven cargo pumps and discover a person laying at the foot of the ladder. What action should be taken?
A
Promptly notify the deck watch officer.
15
Q
Which of the following statements is true concerning the overboard discharge of vessel sewage at sea?
A
All of the above.
16
Q
Using a sea anchor with the survival craft will
A
Reduce your drift rate.
17
Q
Which of the following statements is correct regarding the fog applicators used in conjunction with the combination nozzle?
A
On container ships, an applicator termed a bayonet or piercing type utilizes a sharp tip for cutting and penetrating the metal skin of a container.
18
Q
The purpose of try-cocks used on an auxiliary boiler is to
A
Provide an alternate means of determining the water level, if the gage glass fails.
19
Q
One disadvantage of using a mechanical shaft seal instead of mechanical packing is that
A
Seal failure usually requires the immediate removal of the pump from service.
20
Q
Steel-toed safety shoes are recommended for many types of work. What type of work activity would be an exception to the rule and where steel-toed shoes would NOT be recommended?
A
Electrical maintenance work.
21
Q
Which of the pumping systems listed for use aboard ship will most likely use a propeller type pump?
A
Main circulating system.
22
Q
For a lubricating oil, what is the relationship between viscosity and temperature?
A
As the temperature of a lubricating oil increases, the viscosity of the lubricating oil decreases.
23
Q
According to the illustrated steam tables, what would be the superheater outlet temperature if saturated steam at 400 psia was elevated 192.83°F? Illustration SG-0004.
A
637.42°F
24
Q
After prior isolation and lock-out/tag-out procedures are performed, which electrical device requires discharging any stored electrical energy before any work may safely begin?
A
Capacitor.
25
Which of the following descriptions should be included when identifying the length for pipe nipples?
Close, short, long, and tank.
26
The most common cooling agent used for fighting fires on tank vessels is
Water.
27
The principle personnel hazard unique to Halon fire extinguishers is
Inhaling toxic vapors produced when exposed directly to a flame for extended periods.
28
Which of the following reasons represents why the designed compression ratio of a gasoline engine is lower than that of a diesel engine?
The heat of compression is not used as an ignition source of the fuel.
29
Which of the following direct reading pressure gauges is capable of measuring and displaying two pressures simultaneously?
Duplex gauge.
30
A gate valve installed in a piping system should be used
In either fully closed or fully opened positions.
31
In addition to achieving a speed reduction for efficient propeller operation, what statement represents other possible functional purposes for reduction gears?
Reduction gears can be used for propeller thrust reversal and reduction gears can be used for multiple prime mover inputs.
32
A large oil fire on the weather deck of a ship can be effectively fought using
Foam.
33
When securing a steam reciprocating pump, which of the valves listed should remain open until the cylinder is drained?
Steam cylinder drain valve.
34
A fire is considered "under control" when
The fire is contained and no longer spreading.
35
The component shown in the illustration, labeled "IV", is the __________. Illustration SE-0013.
Bull gear.
36
In what application is an emergency shutdown most likely to be located outside the machinery space when the pump itself is located within the machinery space?
Fuel oil transfer pump.
37
The component labeled "A", as shown in the illustration, would be identified as the ______. Illustration GS-0175.
Oil level sensing probe.
38
The illustrated hydraulic pump graphic symbol is used to depict a __________. Illustration GS-0098.
Combined, pump unit.
39
In a typical automatic fire alarm system, which of the listed actions will cause an indication of a fire to be given in the annunciator cabinet?
All of the above. (A manual fire alarm box is activated., The fire alarm test push button is operated., A rise in temperature activating a heat detector.)
40
One of the main differences between the various types of screw pumps is in the
Pitch of the screws.
41
The tool used to prepare copper tubing for the installation of fittings is called a
Flaring tool.
42
Which of the following methods applies to how a vacuum is created by a jet pump or an eductor?
A rapidly moving stream of fluid passing through a nozzle.
43
An LNG carrier has an approved type of gas detecting system to detect methane leaks in the
All of the above. (cargo handling rooms, boiler burner supply piping, barrier spaces)
44
In the illustrated diesel engine, which label points to the piston? Illustration MO-0122
4
45
The reading of a combustible gas indicator indicates the percentage of the
Lower explosive limit of a flammable gas concentration.
46
Which of the following maintenance procedures would require a tag-out/lock-out to be performed?
Changing the oil of an air compressor.
47
When renewing spiral packing in a centrifugal pump stuffing box, the packing gland nuts should be
First tightened, and then backed off, start pump, and while running under normal conditions; tighten evenly and slightly, over time.
48
In what application is a remote valve operator most likely to be located outside the machinery space when the valve itself is located within the machinery space?
A valve located in a fuel oil transfer line.
49
Which of the following statements is true concerning centrifugal pumps?
The flow of liquid is developed by imparting energy due to the rotation of an impeller.
50
Fuel piping should be regularly inspected for leaks. What leak location would be particularly troublesome in terms of presenting a fire hazard?
Fuel oil service pump discharge strainer.
51
Energy losses occurring in a hydraulic system are ultimately absorbed by the
Atmosphere as heat.
52
In terms of the completeness of combustion, in viewing the condition of the stack, what would be the indication of the MOST complete combustion and HIGHEST boiler efficiency?
Light brown haze.
53
When a reciprocating pump is operating at maximum speed, the cushioning valves should be
Almost completely closed.
54
A squeeze-grip type carbon dioxide portable fire extinguisher has been partially discharged. It should be
Labeled empty and recharged as soon as possible.
55
When the compressed air reservoir is placed in line with an air compressor and is used as an aftercooler, what must be done with the reservoir?
It must be frequently drained of condensed water.
56
A check run on a hydraulic anchor windlass during long periods of inactivity should be carried out to
Renew the internal coating of lubrication.
57
If you hear the general alarm sounded 3 times supplemented by 3 short blasts of the whistle, what does this indicate?
Dismissal from fire and emergency.
58
Which of the following statements is true regarding mechanical seals?
They are normally lubricated and cooled by the fluid being pumped.
59
Which of the following modes of heat transfer does NOT require any physical contact between a warmer and a cooler substance?
Radiation.
60
The most common type of containment device for spilled oil on the water is the use of
Booms.
61
If item "1" shown in the illustration is a compound gauge indicating zero psig and the water level in the bilges is one foot high, the unit is __________. Illustration GS-0153.
Not turned on.
62
One function of the air receiver in a compressed air system is to
Minimize the system's line pulsations.
63
Which of the following methods is normally used to lubricate bearings in a small high-speed diesel engine?
Pressure lubrication.
64
The output volume of a variable displacement rotary piston pump can be changed only by
Changing the angle of the tilting plate.
65
Which of the following problems could develop due to the accumulation of oil vapors in the crankcase of a diesel engine?
Crankcase explosion.
66
Which of the tanks, shown in the illustration, supplies fuel to the emergency generator? Illustration MO-0058
Diesel Oil Service Tank.
67
If a person gets something in his eye and you observe that it is not embedded, you can
Remove it with a moist cotton-tipped applicator.
68
With regard to the number of passes through the tubes of shell-and-tube heat exchangers, what statement is true?
In two-pass and four-pass heat exchangers, the inlet and outlet tube-side fluid connections are at the same end.
69
What type of fuel oil as part of an oily-water mixture is most likely to have a density approaching that of water?
Heavy residual fuel oil.
70
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
25-50% of the original void space in the bearing.
71
Before electrical work can be safely undertaken, the equipment must be de-energized, locked and tagged out, and verification must be made that the circuit is actually dead. What testing device is most certain to reliably verify that a circuit is actually dead?
An autoranging digital multimeter.
72
What type of respiratory protection provides the greatest protection from the various respiratory hazards, is specifically designed for emergency and rescue situations, but has time constraints associated with its use?
Self-contained breathing apparatus.
73
The advantage of using a dry chemical fire extinguishing agent is
Its good stability and nontoxicity.
74
While loading bulk oil, you notice oil on the water near the barge. Which of the following actions should you carry out FIRST?
Stop loading.
75
The three basic parts of any eductor are the nozzle, the suction chamber, and the
Diffuser.
76
If a cargo tank has not been certified as gas free,
Breathing apparatus should always be used.
77
What could be the cause of water hammer in a steam heating system?
Steam admitted to a cold pipe.
78
An increase in rotor clearances in a rotary pump will
Decrease pump capacity.
79
What statement best represents the characteristics of innage and ullage tank soundings?
Innage is the distance between the surface of the liquid and the bottom of the tank, and ullage is the distance between the surface of the liquid and the top of the tank.
80
Diesel engines are classified as reciprocating internal combustion engines because they
Burn fuel in a closed chamber which imparts linear motion to pistons.
81
The function of item "7" shown in the illustration is to __________. Illustration GS-0153.
Prevent separated oil from mixing with the incoming bilge water.
82
What is meant by the phrase "solid flooding"?
A compartment completely filled from deck to overhead, with every cubic foot of the compartment occupied by flooding water.
83
What is the purpose of the torque limit switch as fitted on an electric motor operated rising stem gate valve?
The torque limit switch protects the valve from being damaged if a foreign object prevents the valve from fully closing.
84
To prevent blowback when attempting to light off an idle boiler, what statement is true?
The boiler fuel oil supply header temperature must be maintained at the temperature necessary to obtain proper atomization of the fuel, the furnace floor should be free of oil, and the furnace should be purged.
85
One of the limitations of foam as a fire extinguishing agent is that foam
Conducts electricity.
86
Which of the listed diesel engine operating conditions should be checked immediately after any diesel engine is started?
Lube oil pressure.
87
According to the illustrated steam tables, what would be the superheater outlet temperature if saturated steam at 400 psia was elevated 192.83oF? Illustration SG-0004.
637.42oF.
88
Which of the following methods is a convenient and effective system of examining the body of an injury victim?
Compare the corresponding parts of the body.
89
Which of the following statements is true concerning carbon dioxide when used as a fire extinguishing agent?
Its smothering effect is excellent for class B fires.
90
The simplest method to use for determining if a centrifugal pump is operating as designed, is to
Close off the discharge valve, and watch for a rise in pressure.
91
Which of the listed conditions is a symptom of sun stroke?
Temperature is high, pulse is strong and rapid, and skin is hot and dry.
92
In heavy seas the helmsman should steer the survival craft
Into the seas.
93
When water is removed from lube oil passing through a centrifugal purifier, the water removed will
Displace an equal amount of water from the bowl seal.
94
Why should you wear a self-contained breathing apparatus before entering a closed compartment to fight a fire?
All of the above.
95
Under what conditions is a CAUTION tag installed at equipment control stations in preparation for performing maintenance or repairs?
When operation of the equipment requires temporary special instructions to be provided.
96
In a compression type automatic grease cup, the lubricant is forced into the bearing by
Spring force.
97
What type of fuel oil as part of an oily-water mixture is most likely to have a density approaching that of water?
Heavy residual fuel oil.
98
An oxygen indicator will detect
An oxygen deficiency in a space.
99
A fire is considered "under control" when
The fire is contained and no longer spreading.
100
Lube oil pumps taking suction from the sump of most small marine engines are usually
Positive displacement type.
101
A pipe coupling is a fitting having
Inside threads on both ends.
102
Of the choices provided, which type of pump does the suction force principle primarily apply to?
Reciprocating pumps.
103
Which characteristic or condition will have the greatest effect on increasing a hydraulic oil's viscosity?
Temperature.
104
When welding or burning aboard a vessel, you must be certain that the space
All of the above (has no oil or flammable material in the area, is properly vented, contains no explosive fumes).
105
According to the temperature/enthalpy diagram for water at atmospheric pressure, if the substance is undergoing a heat gain, what heat transfer process is represented by the region associated with "4"? Illustration SG-0001.
Water absorbing its latent heat of vaporization and changing its physical state to become steam.
106
To remove a hand-held right-handed straight cut reamer after it has gone all the way through a hole, you should
Turn the tap wrench clockwise, simultaneously raising the reamer.
107
The fire extinguishing equipment shown in the illustration is a large __________. Illustration SF-0009.
Dry chemical hose reel system.
108
During oil transfer operations, who would be responsible to guarantee that the posted transfer procedures are being followed?
The designated person in charge.
109
A pump is defined as a device that
Imparts energy to a fluid to move it from point "A" to point "B".
110
Fuel oil day tanks for diesel engines must be checked and cleaned at regular intervals in order to remove
All of the above (water, micro-organism growth, sludge).
110
The passive safety device installed on each Halon fire extinguishing cylinder, to prevent its overpressurization is called a
Rupture disc.
111
If a fire hose is left unattended and under pressure with the nozzle shut off, the fire hose will
Remain motionless.
112
If an air compressor is used to supply air primarily to the combustion control system and other pneumatic controllers, the entire system is known as the
Control air system.
113
With regard to the relative flow patterns through the tubes and the shell of single pass shell-and-tube heat exchangers, what statement is true?
In a counterflow heat exchanger, the flow through the tubes and the flow through the shell are in opposite directions.
114
The lube oil strainer shown in the illustration is used on the reduction gear of a mid-size diesel engine. The strainer elements consist of __________. Illustration MO-0057.
Metal disks.
115
Which of the terms listed below represents the operational speed at which excessive engine vibration is created?
Critical speed.
116
Which of the following statements concerning fire-tube boilers is correct?
Combustion gases flow through the tubes.
117
Reduction gear casings are vented in order to
Avoid a buildup of pressure within the gear case.
118
In what application is an emergency shutdown most likely to be located outside the machinery space when the pump itself is located within the machinery space?
Fuel oil transfer pump.
119
If a sea water-cooled shell-and-tube lubricating oil cooler has the sea water inlet and outlet connections on the opposite end waterboxes, in terms of the number of passes, what statement is true?
The number of fluid passes cannot be determined.
120
"Portable" oil tank cleaning machines are usually provided with a water supply from the
Fire main.
121
When performing a bottom blow on a boiler, what valve is spun open quickly?
Guarding valve (second valve away from the water drum).
122
Which type of pump would normally be used to transfer fairly large quantities of fluids at relatively low pressures?
Propeller type.
123
What is the whistle signal for stop lowering boats?
2 short blasts of the whistle.
124
The tool used for cutting external pipe threads is called a pipe
Stock and die.
125
Which of the below engines might power a large merchant vessel with a direct drive controllable pitch propeller?
Slow speed, non-reversing engines.
126
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)? Illustration GS-0062.
800 psi (56.31 kg/cm2).
127
Which of the listed devices is used to control the admission of steam to the steam cylinder of a reciprocating pump?
Pilot valve and operating rod.
128
What would be the most probable cause for a high-pressure alarm to be activated in a low-pressure CO2 fixed fire extinguishing system?
The tank cooling system has malfunctioned.
129
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?
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.
130
When the compressed air reservoir is placed in line with an air compressor and is used as an aftercooler, what must be done with the reservoir?
It must be frequently drained of condensed water.
131
For a lubricating oil, what is the relationship between viscosity and temperature?
As the temperature of a lubricating oil increases, the viscosity of the lubricating oil decreases.
132
One of the consequences in continuing to operate a centrifugal bilge pump with the discharge valve closed, is that the
Pump will overheat.
133
Which of the devices listed is used to maintain a snug interface between the rotating and stationary seal members shown in the illustration? Illustration GS-0071.
Spring.
134
Why does a centrifugal bilge pump require priming?
Due to the inability of this type of pump to lift water to cover the suction (eye) of the impeller.
135
A spur gear pump should be operated with the discharge valves
Fully opened.
136
In terms of the diluting effect of excessive excess air, when viewing the flame through a peephole, what would be the indication of the greatest diluting effect with far too much excess air?
Dazzling white flame.
137
In an emergency, a hole in the hull below the waterline, not over three inches in diameter, can be temporarily sealed by
Using a soft wooden plug.
138
Which problems can occur if the brake band lining of a wildcat brake becomes excessively worn?
The brake's effectiveness will be reduced.
139
The use of a needle valve in a piping system is recommended when requiring
Close regulation of flow.
