Test for specialists working in Engine room (CES v6.0)

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Правильні відповіді:
1

What is the expansion ratio of the foam produced by the fixed low-expansion foam fire-extinguishing system of an engine room?

Ваша відповідь правильна:

Less than 12 to 1.
2

You are witnessing someone about to faint. What are the symptoms?

Ваша відповідь правильна:

The person may be very pale, and pulse is slow at first and weak.
3

Why is it important to check the timing of diesel engine cylinder oil lubricators?

Ваша відповідь правильна:

To ensure cylinder lubricating oil enters the cylinders when the piston is in the required position.
4

What effect does an increased oil feed flow rate have on the performance of a centrifuge operating as a purifier?

Ваша відповідь правильна:

Separating efficiency is reduced.
5

On some large slow speed engines the crosshead guides are adjustable to allow the clearance between the crosshead shoes and the guides to be set equally. The normal arrangement is to have bolted on guide bars with shims fitted behind them. Which of the methods given in the options is the one normally used to ensure this is done correctly?

Правильну відповідь:

Turn the engine so that the piston skirt is at the bottom of the liner. Use wedges to centralise the piston. Measure the clearances along the length of each bar and shoe and fit shims to equalise the clearances.

Ваша відповідь:

Turn the engine so that the piston for the cylinder concerned is at BDC and measure the clearance along the length of each bar and shoe and fit shims to equalise the clearances.
6

For ideal synchronising as the incomer circuit breaker contacts make, the phase angle difference between the incomer e. m. f. and the busbar voltage should be:

Ваша відповідь правильна:

0°.
7

It is recommended that every prospective seafarer should, before being employed in a sea-going ship, receive proper training in personal survival techniques. In respect of such training several recommendations are made. Answer the question: “To whom should training in personal survival techniques be given?”

Ваша відповідь правильна:

To all seafarers.
8

A seawater pump requires overhaul but there are no spare wear rings for the casing and impeller. It is decided that new wear rings will be fabricated onboard using the ship’s lathe. What would be the most suitable material to use to fabricate the rings onboard?

Ваша відповідь правильна:

Aluminium brass.
9

During maintenance of a pneumatically operated, diaphragm actuated control valve the diaphragm is found to be split. Select, from the options given, a suitable material to use to make a temporary replacement if there is no spare diaphragm available.

Правильну відповідь:

Natural rubber sheet of greater thickness and lower elasticity as the original diaphragm material.

Ваша відповідь:

Natural rubber sheet of approximately the same thickness and elasticity as the original diaphragm material.
10

Which one of the listed requirements regarding the stowage of a survival craft corresponds to present SOLAS regulations? Each survival craft shall be stowed:

Ваша відповідь правильна:

In a secure and sheltered position and protected from damage by fire or explosion.
11

What would the First Engineer require?

Ваша відповідь правильна:

The First Engineer would require an inspection of the heating coils.
12

The lubricating oil in the bearing housing at the turbine end of a turbocharger gets very dirty after only a few hours in service. What is the most likely reason for this happening?

Ваша відповідь правильна:

Damaged rotor shaft sealing bushes allowing exhaust gas to leak into the bearing housing.
13

During maintenance work on a compensated mechanical hydraulic governor air is drawn in to the hydraulic circuit after draining and flushing out the unit. Which of the actions given in the options is most likely to assist in the removal of the air from the system?

Правильну відповідь:

With the governor in operation open the compensation needle valve to introduce instability and disturb the engine load to make the governor hunt.

Ваша відповідь:

Drain the governor again and slowly refill with fresh oil.
14

While alongside at a repair berth a new section of seawater pipe has been fabricated in a shoreside workshop from drawings supplied by the vessel. During fitting of the pipe by ship’s engineers it is noted that the pipe is too short leaving a gap of about 8 mm between the flange faces. What action should be taken to remedy this problem?

Ваша відповідь правильна:

The pipe should be returned to the shoreside workshop for modification or to be remade to the correct dimensions.
15

An electrical power emergency source in a ship is required because:

Ваша відповідь правильна:

It satisfies the SOLAS requirements for ship safety.
16

A power card taken from a diesel engine cylinder using a mechanical indicator has a flat top. Which of the possible actions given in the options is most likely to correct this irregularity on the power card?

Ваша відповідь правильна:

Change the indicator spring for one with a higher rating.
17

The two instruments necessary for generator synchonising are:

Ваша відповідь правильна:

Voltmeter and synchroscope.
18

What is the main reason for keeping engine lubricating oil viscosity within recommended limits?

Ваша відповідь правильна:

To ensure the strength of the oil film is sufficient to keep lubricated surfaces apart.
19

What type of component does this graphical symbol illustrate?

Правильну відповідь:

Pressure-reducing regulator.

Ваша відповідь:

Pressure relief valve.
20

Why may wearing sweat rags slung round your neck when working in the machinery spaces be hazardous?

Ваша відповідь правильна:

The rags may be caught by running machinery or power tools.
21

With two alternators running in parallel, and one is to be disconnected. The first step is to:

Ваша відповідь правильна:

Remove the load from the alternator to be stopped.
22

Give the meaning of the following symbol:

Правильну відповідь:

Start engine.

Ваша відповідь:

Indicates manual starting direction of the engine.
23

Under what circumstances would you remove guards and safety devices from machinery?

Ваша відповідь правильна:

During overhaul and maintenance procedures.
24

What will be the probable outcome if the amplification is set too high on a controller?

Ваша відповідь правильна:

The process will oscillate and get out of control.
25

For two generators running in parallel, their share of additional load (kW) will be determined by the:

Ваша відповідь правильна:

Governor droop settings on each prime mover.
26

Before leaving the machinery spaces of a UMS vessel after routine watchkeeping rounds in the evening, the duty engineer inspects the doors to Fuel Oil Treatment rooms which are covered by a fixed fire fighting installation. For what purpose does he do this?

Ваша відповідь правильна:

To make sure that they are properly closed with the self closing device so that any fire is contained and the extinguishing medium can be released without delay.
27

When referring to onboard oil treatments using a centrifuge, what is meant by the term purification?

Ваша відповідь правильна:

Separation of two insoluble liquids with different densities, and the removal of solids in the same process.
28

After main power is restored (following a blackout), a timed sequential restart of motor driven auxiliaries is necessary to avoid:

Ваша відповідь правильна:

Generator overload due to many motors starting at simultaneously.
29

What acton is required if the crankcase relief valve on an air compressor is operating and emitting an air and oil mixture?

Ваша відповідь правильна:

Overhaul the compressor unit.
30

The exhaust gas temperatures of all cylinders of a diesel engine are seen to be high. Select, from the options given, the most likely cause of this:

Ваша відповідь правильна:

Poor fuel oil quality.
31

What could be the cause of a refrigeration compressor running continuously even though normal temperatures for the cold rooms have been reached?

Ваша відповідь правильна:

Low-pressure cut-out is stuck in closed position.
32

Under which circumstances should a sprinkler head of a common fixed sprinkler fire-extinguishing system be activated?

Ваша відповідь правильна:

Automatically, when the temperature is within a range from 68 °C to 79 °C.
33

An earth fault exists on the blue line of a 100 A bilge pump circuit. A second earth fault occurs on the yellow line of a 10 A ventilation fan circuit. Both systems are supplied from the ship’s 440 V supply. The likely outcome is that:

Правильну відповідь:

A short circuit occurs between earth faults and the ventilation fan fuse blows.

Ваша відповідь:

A short circuit occurs between earth fault and the bilge pump fuse blows.
34

A detector that is activated by a rise of temperature is:

Ваша відповідь правильна:

A thermic detector.
35

What is the main effect on lubricating oil of operating for long periods at excessively high temperature?

Правильну відповідь:

It will cause the oil to oxiside, increasing the viscosity.

Ваша відповідь:

It will cause the oil to evaporate, increasing consumption.
36

The packed gland on a centrifugal pump is leaking even though the gland has been “nipped up”. What is the correct action to take to stop the leakage?

Ваша відповідь правильна:

Re-pack the stuffing box loosely with the correct size packing at the earliest opportunity.
37

For ideal synchronising as the incomer circuit breaker contacts make, the phase angle difference between the incomer e. m. f. and the busbar voltage should be:

Ваша відповідь правильна:

0°.
38

What is the correct name of the tool shown in the illustration?

Ваша відповідь правильна:

Water Pump Pliers.
39

How many separate means of escape are provided from each fire zone above the bulkhead deck?

Ваша відповідь правильна:

At least two.
40

This device can detect a package of drugs inside a large delivery of ship’s stores. What is it?

Правильну відповідь:

Security container.

Ваша відповідь:

Pallet scanner.
41

Thermistors are temperature sensitive devices. A positive temperature coefficient thermistor will typically have:

Ваша відповідь правильна:

Relatively non linear characteristic.
42

Why is it important to check the timing of diesel engine cylinder oil lubricators?

Ваша відповідь правильна:

To ensure cylinder lubricating oil enters the cylinders when the piston is in the required position.
43

It is common practice to connect a resistor over an alarm contact (see diagram) in many applications. Why is this connection used?

Правильну відповідь:

To monitor the cable/wires for break.

Ваша відповідь:

To avoid sparks on the contacts when opening and closing.
44

What is the correct name of the part highlighted in the illustration?

Правильну відповідь:

Exhaust valve.

Ваша відповідь:

Fuel injector.
45

What is meant by the term “feel over sequence” as applied to diesel engine operation following replacement of a crankshaft bearing?

Правильну відповідь:

Stopping the engine to check the bearing temperature after a short period of operation and repeating this procedure at increasing running intervals.

Ваша відповідь:

Stop the engine after 2 hours running to check the bearing temperature by running the hand over it.
46

What is the main advantage of having a central cooling system fitted on board ship?

Правильну відповідь:

It should require less maintenance than a conventional system using only sea water.

Ваша відповідь:

Only one heat exchanger is needed for all cooling duties.
47

Some large slow speed diesel engines have jack bolt arrangements for retaining the main bearing top keep in place rather than the more conventional stud bolts. How does this arrangement affect the maintenance and checking procedures for the tie rods on the engine?

Ваша відповідь правильна:

The tie rods should be fully tensioned before the jacking bolts are loaded to avoid overload of the bearing caps and frame structure.
48

What is the disadvantage of using chemicals on an oil-spill on the water?

Правильну відповідь:

The chemicals make it difficult to remove the oil from the water.

Ваша відповідь:

It is difficult to apply the chemicals if the oil drifts away from the ship’s side.
49

During a bomb search, which of the following is an important principle to follow?

Ваша відповідь правильна:

Do not touch any suspicious packages.
50

What is the correct name of the tool shown in the illustration?

Ваша відповідь правильна:

Monkey wrench.
51

The mandatory color of a hand flare is:

Ваша відповідь правильна:

Red.
52

What is the meaning of “make fast”?

Ваша відповідь правильна:

To secure a rope.
53

New MARPOL regulations came into effect from July 93 stating that the previous instantaneous rate of discharge of oil content (60 litters per nautical mile) was changed to:

Правильну відповідь:

30 litters per nautical mile.

Ваша відповідь:

25 litters per nautical mile.
54

What is the most important task after carrying out any major overhaul on a diesel engine?

Ваша відповідь правильна:

A thorough check inside the engine to make sure all tools and cleaning rags have been removed.
55

What is the most important task after carrying out any major overhaul on a diesel engine?

Ваша відповідь правильна:

A thorough check inside the engine to make sure all tools and cleaning rags have been removed.
56

What is the correct name of the part highlighted in the illustration?

Ваша відповідь правильна:

Turbocharger.
57

What cooling medium is normally used to cool the condenser of a fresh water generator?

Ваша відповідь правильна:

Seawater.
58

Which of the following alternatives summarise the benefits of using high voltage on ships?

Ваша відповідь правильна:

Smaller conductors, machines and switchgear.
59

Which part of the crankshaft of a modern large two stroke diesel engine is most likely to be the origin point for crack initiation during service and therefore needs the greatest attention during maintenance inspection?

Ваша відповідь правильна:

The fillet radii.
60

What is the correct name of the part highlighted in the illustration?

Ваша відповідь правильна:

Crosshead.
61

A seawater pump requires overhaul but there are no spare wear rings for the casing and impeller. It is decided that new wear rings will be fabricated onboard using the ship’s lathe. What would be the most suitable material to use to fabricate the rings onboard?

Правильну відповідь:

Aluminium brass.

Ваша відповідь:

Aluminium.
62

How many Radar Transponders (SART) are required to be carried onboard a ship for use in survival crafts?

Ваша відповідь правильна:

2, one of which being capable of floating free if the ship sinks.
63

What is one of the main features of the cylinder lubricating oil used in large 2 stroke marine diesel engines which normally operate on heavy fuel oil?

Ваша відповідь правильна:

It is strongly alkaline.
64

A section of seawater pipe has been removed for maintenance. When refitting the pipe after completing the work the bolt holes in the flanges are found to be misaligned. What procedure should be followed to finish the work?

Ваша відповідь правильна:

Adjacent pipework should be slackened off to allow the pipe to be aligned. Any incorrectly positioned brackets should be adjusted after the pipe is refitted.
65

During maintenance work on a main diesel engine the fuel injection valve is found to be jammed in the pocket in the cylinder cover. Which of the procedures given in the options should be followed in order to complete the work?

Правильну відповідь:

Replace the complete cylinder cover with a spare unit and land the cover with the jammed valve ashore for repair in a specialist workshop.

Ваша відповідь:

With the fuel injection valve retaining nuts removed admit compressed air into the engine cylinder to try and blow the injection valve out of the pocket.
66

A mechanical seal, consisting of carbon and ceramic seal rings, is to be fitted to a centrifugal pump shaft. What is the most likely result of not being extremely careful when fitting this type of seal?

Ваша відповідь правильна:

The seal rings are brittle and can be easily chipped or damaged.
67

What function is this operational amplifier circuit performing?

Правильну відповідь:

Inverting amplifier.

Ваша відповідь:

Differentiator.
68

The circuit consists of two inductors, L(1) = 6 H and L(2) = 12 H, connected in parallel. Calculate the equivalent L(S) of the two inductors.

Ваша відповідь правильна:

L(S) = 4 H.
69

What is the correct name of the part highlighted in the illustration?

Правильну відповідь:

Camshaft.

Ваша відповідь:

Crankshaft.
70

Modern slow speed, two stroke diesel engines often have locating pins or pegs to keep the piston rings in a fixed position. Why is this arrangement used?

Правильну відповідь:

It avoids the risk of the ends of the piston rings being forced out by the gas pressure and catching on the scavenge ports.

Ваша відповідь:

The piston rings are more difficult to lubricate because of the slow operating speeds and will wear more quickly if they are allowed to rotate.
71

The responsibility for safety and security rests with everybody on board the vessel. General house-keeping rules should be followed. Which of the listed rules is the most important?

Ваша відповідь правильна:

Keep your working area clean and tidy.
72

Which of the following voltage levels would be regarded as high voltage likely to be found on a ship?

Ваша відповідь правильна:

6,6 kV.
73

What is the best method to use to remove heavy scale and fouling from the plates of a heat exchanger?

Ваша відповідь правильна:

Soak the plates in recommended cleaning solution and then use a soft brush or pressure cleaner.
74

On finding a person apparently unconscious in a High Voltage switch room, which of the following should be done?

Ваша відповідь правильна:

Raise alarm, identify means of isolation and apply before approaching victim.
75

What type of construction material should be avoided regarding fire protection purposes? (SOLAS II-2/2.2.3).

Ваша відповідь правильна:

All combustible materials.
76

What do you understand by the order: “Move the pilot ladder to the other side?”

Правильну відповідь:

Move the pilot ladder to the other side, means: to shift the pilot ladder to the opposite side of the ship.

Ваша відповідь:

Move the pilot ladder to the other side, means: to move the pilot ladder further along nearer to the bow.
77

A piston rod retaining nut needs to be tightened during maintenance on the main engine. Which of the given methods should be used to ensure it does not come loose in service?

Ваша відповідь правильна:

Tighten it to the manufacturer’s recommendations using a torque wrench.
78

A flame detector is activated by:

Ваша відповідь правильна:

The infrared radiation and ultraviolet radiation given off by flames.
79

Is it necessary to cool the samples taken from a diesel engine cooling water system before carrying out tests to determine the concentration of treatment chemicals?

Ваша відповідь правильна:

Yes, the samples should be cooled to approximately 25 °C.
80

A ship moving through heavy seas is affected by the water presure at the bows causing an effect known as “Panting”. What structure in the forward region of the ship combats the effects of Panting?

Ваша відповідь правильна:

Panting beams and stringers.
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