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Tankerman > Machinist > Flashcards

Machinist Flashcards

1
Q

All portable electric tools should have a ground connection to prevent

A

Electric shock if the tool is shorted.

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2
Q

Which of the following problems could develop due to the accumulation of oil vapors in the crankcase of a diesel engine?

A

Crankcase explosion.

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3
Q

The external flotation bladder on an immersion suit should be inflated

A

After you enter the water.

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4
Q

Which of the following statements is true concerning the overboard discharge of vessel sewage at sea?

A

All of the above. (The vessel may discharge sewage into the sea, from an approved system which is not comminuted or disinfected, only if the vessel is more than 12 nautical miles from the nearest land., The vessel must have an approved sewage plant., The vessel may discharge disinfected and comminuted sewage into the sea, from an approved system, only if the vessel is more than 3 nautical miles from the nearest land.)

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5
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.

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6
Q

Which of the devices listed would be safe to use in a compartment with insufficient oxygen?

A

Self-contained breathing apparatus.

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7
Q

A large oil fire on the weather deck of a ship can be effectively fought using __________.

A

Foam

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8
Q

Which of the following direct reading pressure gauges is capable of measuring and displaying two
pressures simultaneously?

A

Duplex gauge

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9
Q

What method of controlling severe bleeding is preferred and normally attempted first?

A

Direct pressure applied to wound

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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.

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11
Q

Which of the following methods is a convenient and effective system of examining the body of an
injury victim?

A

Compare the corresponding parts of the body.

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12
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

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13
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

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14
Q

A fire is considered “under control” when __________.

A

The fire is contained and no longer spreading

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15
Q

The most common type of containment device for spilled oil on the water is the use of __________.

A

Booms

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16
Q

The most common cooling agent used for fighting fires on tank vessels is __________.

A

Water

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17
Q

When applying paint with a brush, which of the following pairs of techniques are recommended?

A

Brushes should be dipped into the paint to cover only the ends of the bristles, and the paint
should be applied in parallel strokes only.

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18
Q

A roughened checkered surface is machined by a lathe on round stock using a __________.

A

Knurling tool

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19
Q

A check run on a hydraulic anchor windlass during long periods of inactivity should be carried out to
__________.

A

Renew the internal coating of lubrication

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20
Q

To check the thickness of a piece of thin shim stock before using it to make a bearing shim, you
should use a __________.

A

Micrometer

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21
Q

Pushing the file endways (or with the axis), under pressure, against the work, is called __________.

A

Straight filing

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22
Q

If you hear the general alarm sounded 3 times supplemented by 3 short blasts of the whistle, what
does this indicate?

A

Dismissal from fire and emergency.

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23
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

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24
Q

The principle personnel hazard unique to Halon fire extinguishers is __________.

A

Inhaling toxic vapors produced when exposed directly to a flame for extended periods

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25
Q

The spreading of fire as a result of heat being carried through a vessel’s ventilation system, is an
example of heat transfer by __________.

A

Convection

26
Q

A file coated with oil and stowed away will __________.

A

Both B and C are correct (B. cause the file to slide across the work and prevent fast, clean cutting, C. cause dust and metal particles to collect in the teeth)

27
Q

To get an accurate measurement using a 12 inch machinist’s steel rule, you should measure

A

From the one inch graduation mark

28
Q

Fuel piping should be regularly inspected for leaks. What leak location would be particularly
troublesome in terms of presenting a fire hazard?

A

Fuel oil service pump discharge strainer.

29
Q

The process that occurs when heat is generated by a chemical reaction within a substance and
continues to a point of ignition is known as __________.

A

Spontaneous combustion

30
Q

Which of the following maintenance procedures would require a tag-out/lock-out to be performed?

A

Changing the oil of an air compressor.

31
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.

32
Q

Which of the following modes of heat transfer does NOT require any physical contact between a warmer and a cooler substance?

A

Radiation

33
Q

A pump shaft that is bent or distorted should normally be __________.

A

Replaced with a satisfactory spare.

34
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.

35
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.

36
Q

A squeeze-grip type carbon dioxide portable fire extinguisher has been partially discharged. It should
be __________.

A

Labeled empty and recharged as soon as possible.

37
Q

A thread die will be easier to start if the end of the shaft to be threaded is slightly __________.

A

Chamfered.

38
Q

Ferrous metals are metals containing __________.

A

A large percentage of iron.

39
Q

An LNG carrier has an approved type of gas detecting system to detect methane leaks in the
__________.

A

All of the above. (A. cargo handling rooms, B. boiler burner supply piping, C. barrier spaces)

40
Q

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

A valve located in a fuel oil transfer line.

41
Q

The reading of a combustible gas indicator indicates the percentage of the __________.

A

Lower explosive limit of a flammable gas concentration.

42
Q

With respect to machine shop “taps and dies”, a bottoming tap is correctly used for __________.

A

The second cut when threading a blind hole.

43
Q

What type of fuel oil as part of an oily-water mixture is most likely to have a density approaching that
of water?

A

Heavy residual fuel oil.

44
Q

To drill a hole in round stock, perpendicular to the axis of the piece, the stock should be mounted in a __________.

A

V-block.

45
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.

46
Q

Which of the wrenches listed practically eliminates the possibility of its slipping off while tightening a nut or bolt?

A

Box end wrench.

47
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.

48
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.

49
Q

“Arc eye” can be the result of gazing into an electric arc produced by an electric arc welder where the eyes are inadequately protected. What is the characteristic of the onset of symptoms such as pain, watering of the eyes, and gritty sensation like sand in the eyes?

A

The onset of symptoms may be several hours after the exposure depending on the intensity of the rays and the length of time of the exposure.

50
Q

Which of the following symptoms may be observed in a victim of cardiac arrest as a result of electric shock?

A

Respiration is weak or has stopped.

51
Q

A reading of 0.625 inch on a micrometer with a 2 to 3 inch range would be equal to __________.

A

2 5/8 inches.

52
Q

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?

A

It must be frequently drained of condensed water.

53
Q

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?

A

All of the above. (A. A manual fire alarm box is activated., B. The fire alarm test push button is operated., C. A rise in temperature activating a heat detector.)

54
Q

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 __________.

A

25-50% of the original void space in the bearing.

55
Q

In which of the following heat related illnesses is the individual most at risk for losing consciousness?

A

Heat stroke.

56
Q

Greases used for most marine applications would have what National Lubricating Grease Institute (NLGI) grade?

A

2

57
Q

The tool used to prepare copper tubing for the installation of fittings is called a __________.

A

Flaring tool

58
Q

When a rescuer discovers an electrical burn victim in the vicinity of electrical equipment or wiring, his first step is to __________.

A

Shutdown electrical power in the area.

59
Q

When collecting condensation for drinking water, __________.

A

A sponge used to mop up and store condensation must be kept salt free.

60
Q

In what remote temperature indicating system is a voltage generated by the magnitude of
temperature difference between hot and cold junctions?

A

Thermocouple.

61
Q

For boring holes in mild steel and general work, the correct included angle of a drill point is
__________.

A

118°

Tankerman (4 decks)

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