Test for marine engineers (Engine, Management level, Medium Speed) (CES v6.0)

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Right answers:
1

How can the pressure be regulated during start up of a positive displacement pump such as a gear pump?

Your answer is correct:

Adjustment of the pressure relief valve to recirculate part of the flow.
2

The torsion meter for the main propeller shaft is reading high. The torque is sensed using the angle of twist principle with two clamp rings attached to the shaft at a fixed distance, with stationary proximity switches for measuring the angle of twist and also shaft speed fixed to a rigid stool. What is the most likely cause of the high reading?

Your answer is correct:

Circumferential slip of the after clamp ring in the opposite direction to shaft rotation.
3

How can a lead-acid type battery be checked to confirm if it is fully charged or not?

Your answer is correct:

Measure the relative density (specific gravity) of the electrolyte.
4

The bottom end bolts employed in 4 stroke diesel engines are usually given a finite life and must be replaced periodically. What would be the normal failure mode that would affect these bolts if they were not replaced as required?

Your answer is correct:

Failure due to fatigue stresses.
5

How will continuous low load operation influence the time between overhauls, tbo, for the cylinder covers and associated valves of a 4-stroke diesel engine?

Your answer is correct:

Reduce the time between overhauls due to increased fouling.
6

How should the spare oxygen and acetylene gas welding bottles be stored onboard the ship?

Your answer is correct:

In two separate rooms outside the engine room space.
7

MARPOL – Annex V. Disposal of garbage. Your vessel is in the Red Sea (Special Area) and the Chief Cook is requesting to have some food waste burned in the incinerator. Due to problems with incinerator, you decide to have the waste ground in the Grinder (Lump size max. 25 mm) and disposed off into the sea. Is this prohibited, if not, how far from nearest land is this legal?

Your answer is correct:

12 miles.
8

A water heating system with automatic temperature control uses steam as the heating medium and the temperature is controlled by a pneumatically operated valve. What would be an acceptable start up procedure of the system from cold state?

Your answer is correct:

Start the system up in manual mode and gradually increase the controller output signal until the temperature reaches the required value before changing over to automatic control.
9

How often are “abandon ship” drills required to be held on cargo vessels according to SOLAS?

Your answer is correct:

Once every month.
10

Which is the preferred method for starting an air conditioning refrigeration compressor which has been shut down for a period of time?

Your answer is correct:

Start with suction valve throttled in to minimise risk of drawing liquid refrigerant into the compressor.
11

During inspection and overhaul of a 2-stage reciprocating air compressor the main and bottom end bearing shells are found to be heavily scored with parts of the overlay and bearing metal breaking away. The crankshaft pins are found to have only very light surface scratches. Which of the given options is the best action to be taken to remedy the problem?

Correct answer:

Replace the bearing shells with new spares after cleaning out the crankcase and refilling with clean oil.

Your Answer:

Clean up the bearing surface and crankshaft pins with scrapers and grinding paste and refit them. Refill the crankcase with clean oil.
12

During inspection of the cylinder cover from a medium speed diesel engine cylinder it is noted that cracks have occurred between the two exhaust valve pockets and the fuel injector pocket. Select from the given options the most probable cause of this type of failure.

Your answer is correct:

Excessive thermal stress due to insufficient cooling of the cylinder cover.
13

Which of the following options would be a typical differential pressure setting for a main engine slow down in the event of jacket cooling water system low flow?

Your answer is correct:

0,2 to 0,5 bar.
14

Which of the following equipment is responsible for reducing power factor of ship system?

Your answer is correct:

Electrical switchboard.
15

A 3-phase cage rotor induction motor requires protection by a time delay overload trip. What is the reason for this?

Your answer is correct:

It will allow for inrush current or motor specific faults.
16

A 250V contactor has been fitted to a 220V supply. Which of the following symptoms might be observed?

Your answer is correct:

Contactor chattering (vibrating).
17

Which of the following terms is used to describe a thermodynamic process in which no heat transfer into or out the system occurs?

Your answer is correct:

Adiabatic.
18

During inspection of the crank bearing for one of the units in the main engine, the bearing shell was found as follows. Surface of the white metal was black and very hard. Patches of black incrustations have worn grooves in the journal. What is the likely cause of this condition?

Your answer is correct:

Water present in the lubricating oil during service.
19

Why is it important to have good a relationship between the crew on board a vessel?

Your answer is correct:

It leads to better work performance and positive atmosphere among the crew.
20

The best way to prevent stowaways from boarding your ship is to:

Your answer is correct:

Seal spaces that are not in use while in port, and perform a search of the ship before leaving.
21

For some time the remote reading temperature gauge for the meat room has been reading a higher temperature than the local liquid in glass thermometer. When removed and tested the remote gauge is found to be reading accurately. Which of the options given is the most likely cause of this discrepancy?

Correct answer:

The sensing bulb for the remote gauge is placed in a relative “local hot spot” inside the meat room.

Your Answer:

The liquid in glass thermometer is positioned in a relative “cold spot” in the meat room.
22

Where is the Safety Certificates for ships to be kept?

Your answer is correct:

In the Captain’s office.
23

To avoid overbunkering and oil spill, it is very important that we closely monitor the progress of the bunkering operation. What is the safest method to use to minimise the risk of overflow and spillage?

Your answer is correct:

Continuously monitor remote gauge readings and confirm with regular sounding of the fuel tanks.
24

Which personnel must undergo familiarization training on board?

Your answer is correct:

Everyone.
25

A vessel which normally operates with the engine room in UMS mode is unable to do so because of defects to some of the critical alarm functions. What are the main considerations that the Chief Engineer must take into account when planning alternative arrangements to cover the engine room requirements until the defects are cleared?

Your answer is correct:

A work rota is established to ensure full coverage of engine room watchkeeping duties and adequate rest periods for the engineering staff.
26

During test and/or maintenance work of the CO2 system affecting the release system, precautions to ensure that the gas is not released into the engine room due to a mistake are to be ensured. What precautions should be taken?

Your answer is correct:

The main supply line to be blanked off prior to the work.
27

A portable oxygen analyser for use onboard ship is of the paramagnetic sensing element type. It is being used to test the atmosphere of a space onboard ship but starts to give erratic readings. There is no obvious indication as to why this is happening. Select from the options given the most likely cause of this problem.

Your answer is correct:

The sampling filter is partially blocked giving rise to wide pressure variations in the sampling chamber.
28

The Training Manual shall contain instructions and information on the life-saving appliances and the best method of survival. The training manual shall contain detailed explanations of crew duties in relation to emergency situations. Which of the following tasks or duties shall be included in the manual according to present regulations?

Correct answer:

The use of the ship’s line throwing apparatus.

Your Answer:

The use of navigational equipment for survival crafts.
29

When checking the cylinder pressures of a 6 cylinder medium speed diesel engine it is found that one of the cylinders has a high maximum pressure. What is the most likely cause of this?

Your answer is correct:

Fuel timing to that cylinder too far advanced.
30

Most fuel oil separators working on the centrifuge principle have an automatic start up and sludging facility. Which of the following actions would you expect to occur first during the start up sequence?

Your answer is correct:

Operating water supplied to bowl to close it.
31

A dynamic test of the winch brake with a proof load equal to 1,1 times the weight of the survival craft or rescue boat and its full complement of persons and equipment should be carried out:

Your answer is correct:

Every year.
32

A refrigeration plant is short cycling even though there is plenty of refrigerant in the system and all of the rooms are above temperature. From the options given select the one which is the most likely cause of the problem:

Your answer is correct:

Blocked filter drier causing the automatic low pressure cut out to operate.
33

What is the alcohol in the blood permissible under US legislation before it is defined as intoxication?

Your answer is correct:

0,04 %.
34

Which of the following options is the most likely to result in the maximum cylinder pressure for all cylinders on a diesel engine to be lower than normal?

Your answer is correct:

Poor quality fuel.
35

The coil of a 12V, 120mA DC relay must be connected across a 24V supply. What action should be taken?

Your answer is correct:

Install a 100 ohm resistor in series with the coil.
36

Flow irregularities in pipes are not caused by:

Your answer is correct:

Straight pipe.
37

A low exhaust temperature in one cylinder of a diesel engine is noticed during routine checks. Which of the options given is the most likely cause of this?

Your answer is correct:

Some of the nozzle holes of the fuel injection valve are blocked.
38

When should a crew member joining a ship for the first time be given some training and instructions in the use of the ship’s fire-fighting appliances?

Your answer is correct:

As soon as possible but not later than 2 weeks after he joins the ship.
39

Can a ZENER BARRIER be installed in a hazardous area?

Your answer is correct:

No, as only the output from the barrier is intrinsically safe this is not allowed.
40

What is meant by dead ship condition?

Your answer is correct:

Condition under which the main propulsion plant, boilers and auxiliaries are not in operation due to absence of power.
41

The majority of conversions adopted under the auspices of IMO fall into which of the three main categories:

Your answer is correct:

Maritime Safety, Prevention of Marine pollution, Liability and compensation.
42

When bunkering through the port side of the bunker manifold what action should be taken with the valves on the starboard side of the manifold prior to bunkering operations commencing?

Your answer is correct:

Blank flanges should be fitted to the closed starboard side manifold valves.
43

A vessel’s main propulsion system consists of a pair of medium speed diesel engines driving a single controllable pitch propeller through clutches and coupled through a reduction gearbox. What is the preferred sequence to follow when going from two engine to single engine operation? Assume engine A is to be stopped and engine B is to continue running?

Your answer is correct:

Pitch to zero thrust, reduce speed to idling speed, disengage clutch of engine A, increase speed of engine B and propeller pitch as required. Stop engine A after suitable cooling period.
44

Spray painting has been carried out in the engine room while the engine was running, and the turbocharger intake filter was not protected. Which one of the options given is most likely to result from this?

Your answer is correct:

Scavenge air pressure lower than normal.
45

When work must be done on High Voltage equipment, it is vital that the equipment is earthed (grounded) after isolation procedures have been carried out. Why is this so?

Your answer is correct:

To ensure that no energy remains in the system and that it cannot be recharged by external influences.
46

A high speed diesel engine has been subject to a major overspeed incident due to governor failure. During checks for damage it is found that some of the bottom end bolts have slackened off slightly. There appears to be no other damage to any of the bearings, the running gear or to the crankshaft. From the options given select the action to be taken before bringing the engine back into service.

Your answer is correct:

Renew all of the bottom end bolts.
47

The engine turns over normally when starting air is supplied but does not fire even though normal starting rpm is achieved. What could be the probable cause to this?

Your answer is correct:

Air in the fuel oil system.
48

A plate type heat exchanger in a central cooling system has seawater leaking around the edges of some of the titanium plates. After inspection and reassembly following the manufacturer’s instructions the problem still exist. What action, from the options given, should be taken to rectify the problem?

Your answer is correct:

Fit new gaskets to the each of the plates.
49

Medium and high speed diesel engines used for electrical generation duties on board ship have overspeed protection devices fitted to protect the engine in case the electrical generator trips while carrying high loads. Why are these devices necessary?

Your answer is correct:

To stop the engine before any serious damage occurs due to excess inertial loads.
50

The operating mode of a pyrotechnic signal depends essentially on:

Your answer is correct:

Instructions or diagrams printed on its casing by the manufacturer.
51

Electric arc welding is to be carried out in the machinery spaces other than the workshop. Which of the alternatives below would be the preferred method for the connection of the “return” cable to the welding set?

Your answer is correct:

Use a “go and return” system with the return cable connected directly from the welding set to the work piece if possible.
52

When considering instrumentation systems, what is a typical symptom of a fault with the span of an instrument?

Your answer is correct:

Zero-point is accurate, but 100 % input is not giving 100 % output.
53

What should be the healthy continuity resistance of a 220V, 2,2kW, 10A heating element, when checked near to it’s rated operating temperature?

Your answer is correct:

22 Ohms.
54

The muster list shall show the duties assigned to the different members of the crew. Which of the given duties necessarily have to be included in the muster list?

Your answer is correct:

Clearing escape routes.
55

Some ships generate electrical power at 440 Volts, but then step up this voltage to supply specific electrical equipment. One common example, may be to feed a large bow thruster. Why is this done?

Correct answer:

A large bow thruster will draw very large currents at low voltage. Being typically remote from the generator, significant voltage drops would occur at low voltage.

Your Answer:

The overall ship’s electrical load does not justify High Voltage generating plant. This method allows more power to be delivered to the bow thruster at low running cost.
56

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

Your answer is correct:

To avoid pollution.
57

A medium speed diesel engine is used to drive a controllable pitch propeller through a suitable clutch and reduction gearbox. What should the propeller blade attitude normally be after the engine is started and before the clutch can be engaged?

Your answer is correct:

The blades should be in the zero pitch position.
58

The pyrotechnics used to transmit visual signals to other vessels, boats or aircrafts are of the following type:

Your answer is correct:

All of the below mentioned.
59

What is the best method for ensuring that the cylinder powers of a high speed diesel engine, fitted with a monoblock multi-cylinder fuel pump, are correctly balanced?

Your answer is correct:

Have the fuel pump phased and calibrated in a test workshop.
60

A two step controller (open/close) has failed and the only available spare controller is a P+I controller. Select, from the options given, how the P+I controller could be set up to achieve approximate two step control.

Your answer is correct:

Set the proportional band to maximum width and the integral action to minimum (repeats per minute).
61

A medium speed diesel engine which is supported on a steel chocking system has had repeated problems with two of the chocks at the end of the engine on the port side becoming slack. This has led to some fretting damage to the bedplate and tank top in that area. What action should be taken to affect a cost effective permanent repair?

Your answer is correct:

Replace the damaged chocks with resin based chocks of an appropriate size.
62

The cold room temperature is almost at the cut out point in a vapour-compression refrigeration system. What should the refrigerant state be just after the evaporator if the system is correctly set up?

Your answer is correct:

Slightly superheated low pressure gas.
63

The main propulsion diesel engine is normally started by direct admission of compressed air. Which one of the following statements is correct?

Your answer is correct:

A heavily leaking starting air valve may cause an explosion in the starting air pipe system.
64

Who is responsible for ensuring that your ship’s security plan meets the requirements of the ISPS Code?

Your answer is correct:

Company Security Officer.
65

What does ISM stand for?

Your answer is correct:

The International Management Code for the Safe Operation of Ships and for Pollution Prevention.
66

What type of dynamic forces may cause indent in plating on forecastle deck and main deck in way of pillars inside forecastle?

Your answer is correct:

Pressure forces caused by green water on deck.
67

In tanker operations, there will be some areas and zones where flammable or explosive vapour, gas, or dust may be expected. Such areas are classified as hazardous. What is meant by hazardous area Zone 1?

Your answer is correct:

Flammable mixture is continuously present or present for long periods.
68

During maintenance work on the main engine a problem arises regarding the lifting of a main component in that the manufacturer’s instructions ado not apply to the engine as fitted and present a hazard. In which of the information/record sources given in the options, is it most important to record the information relating to this anomaly?

Your answer is correct:

ISM procedures in the ship’s safety manual.
69

A transformer overheats while taking a shore supply. Which is the likely cause?

Your answer is correct:

Incorrect frequency.
70

Which of the following symptoms would indicate that the filter drier in a refrigeration circuit has become blocked?

Your answer is correct:

A large temperature drop across the drier.
71

The main engine is running steady with an average exhaust gas temperature of approximately 350 °C. What would be a typical alarm/slow down setting for the cylinder exhaust gas temperature deviation from the average?

Your answer is correct:

+/- 50 °C.
72

A vessel is installed with Power Management System (PMS). If there is an increase overload or fault in a running generator, what will the PMS do?

Your answer is correct:

It will activate the Public Alarm system and shut down the generator instantly.
73

What is usually the effect on G when the ship is damaged below the waterline, with water ingress?

Your answer is correct:

It lowers.
74

Which of the given options for the value of differential pressure across a lubricating oil filter for a medium speed diesel engine would indicate that the filter required cleaning?

Your answer is correct:

1,0 Bar.
75

The temperature control for the central cooling system low temperature circuit has failed and a new 3 term controller is to be fitted. Which of the given options would be the correct method of setting up the controller?

Your answer is correct:

Set the proportional action first.
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