Test online for seamans about Engine department, Operational level, Steam (CES v6.0)

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Правильні відповіді:
1

Which diagram is the symbol for a THYRISTOR?

Ваша відповідь правильна:

Figure 2.
2

What action should be taken if the heat transfer capacity of a heat exchanger operating as a lubricating oil cooler is reducing?

Ваша відповідь правильна:

The heat transfer surfaces should be cleaned.
3

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?

Ваша відповідь правильна:

Replace the complete cylinder cover with a spare unit and land the cover with the jammed valve ashore for repair in a specialist workshop.
4

A faint is a brief loss of consciousness of no more than momentary duration caused by a temporary reduction in the flow of blood to the brain.How to prevent anyone from fainting?

Правильну відповідь:

Tell the person to sit down and lean forward with the head between the knees taking deep breaths.

Ваша відповідь:

Tell the person to sit down in a sitting position breathing normally.
5

The bilge holding tank level is being reduced by discharging through the OWS. What action should be taken when the oil/water interface in the holding tank is reached?

Ваша відповідь правильна:

Stop the OWS and pump the oil to the incinerator tank.
6

Vibration analysis is often used as a conditioning monitoring tool onboard ship as part of the approved planned maintenance system. Many vibration measuring instruments are fitted with a harmonic filter/analyser. How would these filters normally be used during vibration measurement on a centrifugal pump?

Правильну відповідь:

To isolate a single frequency of vibration associated with one of the pumps components.

Ваша відповідь:

To block out any noise or vibration from the surrounding engine room.
7

How would you report containers with dangerous goods lost overboard?

Ваша відповідь правильна:

My vessel has lost containers with dangerous goods of IMDG Class ___ in position ___.
8

Which of these weapons are widely available and commonly used by criminals and terrorists to further their aims?

Ваша відповідь правильна:

Gun.
9

When having a fire alarm during normal working hours, what immediate actions should be taken?

Ваша відповідь правильна:

Act according to instruction given in the fire plan.
10

When you join a new ship, how are you informed about safety rules, alarm instructions and your own duties in case of an emergency?

Ваша відповідь правильна:

By muster lists exhibited in conspicuous places.
11

High Voltage (HV) cables are smaller than low voltage cables for a given power rating. Why is this?

Ваша відповідь правильна:

The HV cable carries a smaller current and therefore requires less copper.
12

Which of the survival craft listed below is equipped with a buoyant line, not less than 50 m in length, of sufficient strength to tow a liferaft?

Ваша відповідь правильна:

Rescue boat.
13

The refrigeration system for the ships provisions consists of a number of cold rooms served by a central refrigeration system. The evaporator coils for the vegetable room are found to be frosting up even though the room is down to temperature and the liquid line valve has closed. Select, from the options given, the automatic control component which is likely to be malfunctioning and so cause this condition.

Ваша відповідь правильна:

Back pressure control valve.
14

The ring expander for removal and refitting of an air compressors piston rings is found to be broken and unusable. The work cannot be delayed until a replacement is obtained. Which of the methods given in the options should the ship’s engineers use to complete the work?

Ваша відповідь правильна:

Fabricate a conical guide from tin plate or similar with the large diameter just bigger than the compressor piston so the rings can be eased open for fitting.
15

The Base Number of a lubricating oil is an indication of which of the following?

Ваша відповідь правильна:

The alkalinity of the oil.
16

The insulation resistance (IR) to earth of a new galley hot-plate is measured to be 30 Mohm. When three identical hot-plates are tested together their combined IR will be:

Ваша відповідь правильна:

10 Mohm.
17

Which electronic component is this graphical symbol illustrating?

Ваша відповідь правильна:

Zener diode.
18

What is the correct range for the pH-value for the water in an oil fired steam boiler?

Ваша відповідь правильна:

9-11.
19

From the statements given in the answer options, choose the one which is most accurate in relation to the operation of water-tube boiler and fire-tube boilers.

Ваша відповідь правильна:

Water-tube boilers are more efficient and generally contain less water than fire tube boilers. They are prone to major damage when run dry during operation.
20

With the set point at the actual desired value, a temperature control system is giving an unacceptably large offset (difference between set point and measured value) on high load resulting in a low system temperature. Which of the actions given in the options should be taken to reduce this effect and therefore achieve closer control of the temperature?

Ваша відповідь правильна:

Reduce the width of the proportional band for the controller.
21

Why shall a duly qualified officer supervise any potential polluting operation?

Ваша відповідь правильна:

To avoid pollution.
22

A deadweight tester is used to check and calibrate a pressure gauge. The tester consists of a hydraulic pump and a hydraulic chamber and balance weight system. After completing the calibration of the pressure gauge the hydraulic pressure should be relieved before removing the weights. Select, from the options given, the main reason for this requirement.

Ваша відповідь правильна:

To protect the piston in the hydraulic system from possible impact damage as it may reach the end of its stroke.
23

Which electronic component does this graphical symbol represent?

Ваша відповідь правильна:

Potentiometer, 10 kilo-ohms.
24

A hand flare must have a burning period of at least:

Ваша відповідь правильна:

1 min.
25

Which of the options given is one of the main responsibilities of a watch-keeping engineer?

Ваша відповідь правильна:

To inform the Chief Engineer of any situations that cannot be controlled during the watch.
26

B Class divisions in ships are constructed so that they are capable of preventing the passage of flame to the end of a standard fire test held for:

Ваша відповідь правильна:

30 minutes.
27

An air compressor is being refitted in the engine room. The compressor and motor are coupled using a flexible coupling and are mounted on a common “skid” which fixed to the deck with resilient mountings. Which of the statements, from the options given, relating to the alignment of the motor and compressor is true?

Ваша відповідь правильна:

Shims should be fitted between the motor and compressor feet and the skid to ensure correct vertical, horizontal and parallel alignment of the coupling halves before it is bolted up.
28

During “dry lay up” of a main water tube boiler it is necessary to maintain dry, low humidity environment in the water spaces. Which of the chemicals given in the options would best achieve this condition?

Ваша відповідь правильна:

Silica gel.
29

Generators must be synchronised before they can operate in parallel. During synchronising, the incoming generator should be running slightly “fast” compared to the bus bar frequency. This is to ensure that the:

Ваша відповідь правильна:

Incoming machine picks up as a generator.
30

With reference to using centrifuges for cleaning fuel and lubricating oil what is the difference between a purifier and a clarifier.

Ваша відповідь правильна:

In a clarifier only solids are removed from the oil, whereas in a purifier both solids and water are removed from the oil.
31

Choose the option which is most likely to result in erosion of the tubes in a heat exchange:

Ваша відповідь правильна:

Cooling water velocity too high.
32

The end covers for a heat exchanger are held in place by a number of brass studs and nuts. Which of the tools given in the options is best suited for removal and tightening of the nuts?

Ваша відповідь правильна:

Ring spanner or socket.
33

What do you understand by the initials EPIRB?

Ваша відповідь правильна:

Emergency Position Indicating Radio Beacon.
34

What will you serve seafarers who has been exposed to cold?

Ваша відповідь правильна:

Warm nutritious drinks.
35

Why do some diesel engine manufacturers recommend machining the valve spindle sealing surface with a half degree difference to the valve seat angle?

Ваша відповідь правильна:

To improve valve sealing by compensating for pressure and temperature effects on the valve during engine operation.
36

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:

Ваша відповідь правильна:

A short circuit occurs between earth faults and the ventilation fan fuse blows.
37

After water-washing the turbocharger exhaust side it starts to vibrate even though it was operating normally prior to the washing procedure. What is the most likely cause of this problem?

Ваша відповідь правильна:

The rotor blades are damaged or the blades are not properly cleaned.
38

As part of a survey of a main steam boiler it is necessary to check the condition of the steam drum. What would be the preferred method for checking drum shell thickness in such a situation?

Ваша відповідь правильна:

Use ultrasound equipment.
39

Why are duplex filters usually employed in the lubricating oil system of an auxiliary diesel engine?

Ваша відповідь правильна:

Changing of the filter element can be carried out without interrupting engine operation.
40

The recognised definition of High Voltage equipment is anything that operates at over which of the following levels?

Ваша відповідь правильна:

1 000 Volts AC or 1 500 Volts DC.
41

An accumulation test may be necessary for a steam boiler following repairs or modifications. Which of the given options does the accumulation test check?

Ваша відповідь правильна:

The capacity of the safety valve to relieve pressure.
42

Why should engine and boiler rooms be kept clean and any oil spillage cleaned up immediately?

Ваша відповідь правильна:

To reduce risk of fire and the risk of slipping.
43

How many buoyant smoke signals are carried in each lifeboat?

Ваша відповідь правильна:

2.
44

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.
45

What is meant by the term “two stage air compressor”?

Ваша відповідь правильна:

A compressor in which the compressed air from the first stage is further compressed in the second stage before being delivered to the air receiver.
46

The Ziegler-Nichols method is used in control engineering when setting up the system. Which of the system components given in the options would this method be applied to during initial set up?

Ваша відповідь правильна:

PID controller for tuning.
47

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

Правильну відповідь:

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

Ваша відповідь:

The seal rings are hard and may score the pump shaft.
48

In accordance with SOLAS and other international regulations, certain important machinery functions, such as operation and control of the steering gear and propulsion machinery, must be tested at specified times. When should these tests be carried out?

Ваша відповідь правильна:

Prior to arrival and departure from port and following maintenance.
49

Which ships does the ISM code apply to:

Ваша відповідь правильна:

All passenger ships, all cargo ships of 500 GRT or above.
50

Chemical boiling out is one method that is used for cleaning the waterside of a steam boiler. Select from the given options the likely circumstances under which this procedure would be considered necessary?

Правильну відповідь:

Contamination of the boiler water by oil.

Ваша відповідь:

Excess chloride levels in the boiler water.
51

What is an effective means of measuring the total dissolved solids in boiler water?

Ваша відповідь правильна:

Conductivity test.
52

Select the one option which correctly completes the following statement: A portable ladder ____.

Ваша відповідь правильна:

Should be secured before working from it.
53

When a ships derrick or crane lifts a weight off the deck of a ship, from which position can the centre of gravity of the weight be considered to act?

Ваша відповідь правильна:

From the head of the derrick or crane.
54

When handling drugs:

Ваша відповідь правильна:

Wear skin protection.
55

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

Ваша відповідь правильна:

It satisfies the SOLAS (and other) requirements for ship safety.
56

Give the meaning of the symbol:

Ваша відповідь правильна:

EPIRB.
57

What is the minimum working pressure of the international shore connection?

Ваша відповідь правильна:

1 N/mm2.
58

A large electric motor is being removed from a main seawater pump with the aid of the engine room crane. Which is the best method of starting the lift from the options given?

Ваша відповідь правильна:

Use a suitable chain block suspended from the crane hook to “break” the motor free after slackening all of the retaining bolts.
59

What would be the most likely cause of a smell of “rotten eggs” in the upper casing of the engine room?

Ваша відповідь правильна:

A leak of exhaust gas from a boiler or diesel engine exhaust.
60

When operating two centrifuges in series, in a purifier and clarifier arrangement, what is the purpose of the clarifier?

Ваша відповідь правильна:

To improve the efficiency of solids removal.
61

What is the recommended range for the pH-value for the water in a diesel engine cooling system engine cooling water be maintained?

Ваша відповідь правильна:

Between 7 and 10.
62

What is the minimum number of portable fire extinguishers that must be carried on ships of 1 000 GRT and above?

Ваша відповідь правильна:

5.
63

When is a machine “securely guarded”?

Ваша відповідь правильна:

When it is fitted with a guard or similar device which prevents foreseeable contact between a person, his clothing or items held in his hands, whilst it is in operation.
64

Consider a 450 volt, 859 kW rated generator has not been in operation for several weeks. Prior to starting, insulation resistance readings are taken. The minimum acceptable insulation resistance reading on the main stator winding to allow you to proceed with running the generator is:

Ваша відповідь правильна:

1 000 000 Ohms.
65

Which of the following instruments is normally part of a control-loop?

Ваша відповідь правильна:

Transducer.
66

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

Ваша відповідь правильна:

Relatively non-linear characteristic.
67

What would the First Engineer require?

Ваша відповідь правильна:

The First Engineer would require an inspection of the heating coils.
68

Are there any restrictions about how much sludge we can pump overboard on the sea voyage?

Ваша відповідь правильна:

Maximum is 30 litre per nautical mile and total is 1/30 000 part of full cargo on the ballast voyage.
69

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

Ваша відповідь правильна:

During overhaul and maintenance procedures.
70

Feed check valves for the main and auxiliary boilers are normally of the double shut off type with one screw lift valve and one screw down non-return valve. What is the main function of the non-return valve?

Ваша відповідь правильна:

To prevent the steam and water in the boiler from discharging out through the feed line if the feed line fractures or a joint in the line blows.
71

What are class “C” bulkheads?

Ваша відповідь правильна:

Bulkheads constructed of approved non-combustible materials but do not meet any of the requirements relative to smoke and flame nor limitations relative to temperature rise.
72

What is the main reason for routine testing of the cooling water in a diesel engine cooling system?

Ваша відповідь правильна:

To ensure that the correct levels of chemical treatment are maintained at all times.
73

Measuring instruments must be routinely calibrated. What is the meant by instrument calibration?

Ваша відповідь правильна:

Comparing input and output values against a documented standard.
74

How do we recognize a leaking fuel injection valve during testing?

Ваша відповідь правильна:

The pressure falls off on the pressure gauge when trying to hold the pressure in the injector below normal opening set pressure.
75

Watch keeping engineers shall have a minimum of knowledge of the vessel’s engine room and operation of its functions prior to being accepted as Engineer on Duty, and shall acknowledge his familiarization with the equipment by signing a check list listing all units he shall be able to operate.

Ваша відповідь правильна:

He shall have all the knowledge as listed in the other alternatives.
76

What does the term “Dead Ship” mean?

Ваша відповідь правильна:

“Dead Ship” means that the machinery and boilers are inoperational due to lack of electrical power.
77

During regular inspection of alternator windings it is found that windings are always covered with a heavy oil film coming from the atmosphere surrounding the auxiliary engine. After cleaning with an approved solvent, what should be done?

Ваша відповідь правильна:

Improve material of intake air filters.
78

When using portable ladders during work activities onboard a ship what precautions should be taken?

Ваша відповідь правильна:

Secure the ladder top and bottom and have a shipmate standing by while you are working on the ladder.
79

Compressed air for instrument and control purposes needs to be of high quality. In order to condition the air filter modules are usually fitted to remove the contaminants. If there is evidence of oil carry over to the final elements in the instrumentation air system what is the most likely cause?

Ваша відповідь правильна:

The coalescer module is saturated and requires renewal.
80

What is the anticipated rolling period of a ship with a large initial Transverse Metacentric Height (GM) and would there be any associated dangers to consider?

Ваша відповідь правильна:

Short sharp period of roll associated with breaking lashings and shifting cargo.
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