Test for specialists working in Engine room (CES v6.0)
Результати проходження тесту
Тест складався із 80 випадкових питань.
Усього питань на цю тему: 147
Усього питань на цю тему: 147
Ваш результат: 81%
Правильні відповіді:
1
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.2
What is the approximate content of oxygen in air?
Ваша відповідь правильна:
21 %.3
What is the ideal working temperature for physical work?
Ваша відповідь правильна:
17-20 °C.4
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.5
A flame detector is activated by:
Ваша відповідь правильна:
The infrared radiation and ultraviolet radiation given off by flames.6
MARPOL – Annex V. Disposal of garbage outside “Special Areas”. After unpacking spares, you are left with a limited amount of packing materials. Is this prohibited, if not, what will be the nearest distance to land for disposal into the sea of these materials?
Правильну відповідь:
12 miles.Ваша відповідь:
This is prohibited.7
What is the main advantage of having a central cooling system fitted on board ship?
Ваша відповідь правильна:
It should require less maintenance than a conventional system using only sea water.8
What is the main reason for keeping engine lubricating oil viscosity within recommended limits?
Правильну відповідь:
To ensure the strength of the oil film is sufficient to keep lubricated surfaces apart.Ваша відповідь:
It is not important.9
What is the period of validity of the Safety Management Certificate?
Ваша відповідь правильна:
5 years.10
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.11
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.12
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.13
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.14
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.15
When you are calibrating an instrument what is the most common second step in the procedure?
Ваша відповідь правильна:
Adjustment of span.16
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.17
With regard to radar, what would be a correct form of response to the question: “What range scale are you using?”
Ваша відповідь правильна:
The correct form of response would be: “I am using the 12 mile range scale”.18
You are starting to get low on water in the lifeboat. What should you do?
Ваша відповідь правильна:
Collect rain water.19
Is it always possible to use the word “ship” instead of the word “boat”?
Правильну відповідь:
Normally a small vessel is called a “boat” rather than a “ship”, otherwise it is not important.Ваша відповідь:
A large vessel is always called a “ship” and never a “boat”.20
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°.21
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.22
A vapour compression refrigiration system is usually fitted with a number of devices to give protection and control of the system. Which of the methods given in the options should be used to test the high pressure cut out during routine maintenance and checking of the system?
Правильну відповідь:
Gradually shut in the condenser cooling water valve or the condenser refrigerant inlet valve while closely monitoring the compressor discharge pressure.Ваша відповідь:
Close the condenser outlet valve and closely monitor the condenser pressure.23
During maintenance of a piston rod stuffing box on a large, slow speed diesel engine it is usual to measure the butt gaps between the sealing ring and scrapper ring segments. What would be the effect of these gaps being too small?
Ваша відповідь правильна:
If the gaps are too small they could close due to the radial wear of the rings before the next scheduled overhaul preventing the rings from contacting the piston rod and sealing it.24
Give the meaning of the following symbol:
Ваша відповідь правильна:
Start engine.25
The two instruments necessary for generator synchonising are:
Правильну відповідь:
Voltmeter and synchroscope.Ваша відповідь:
Synchroscope and kVar-meter.26
Where would you find out which fire sections are enclosed by “A” or “B” class divisions on a ship?
Ваша відповідь правильна:
On the Ship’s fire control plans.27
What cooling medium is normally used to cool the condenser of a fresh water generator?
Ваша відповідь правильна:
Seawater.28
As part of the regular maintenance for a paramagnetic oxygen analyser used for measuring the oxygen content of exhaust gas it is important to keep the sample line filter as clean as possible. Why is this necessary with this type of instrument?
Ваша відповідь правильна:
Pressure variations in the sample chamber can cause errors so restrictions must be kept to a minimum.29
What action should be taken by the engine room rating if a piece of machinery is not functioning properly?
Ваша відповідь правильна:
If machinery does not function properly, the Chief Engineer should be called out immediately.30
What is the correct name of the part highlighted in the illustration?
Ваша відповідь правильна:
Connecting rod.31
A detector that is activated by a rise of temperature is:
Ваша відповідь правильна:
A thermic detector.32
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 carefull when fitting this type of seal?
Ваша відповідь правильна:
The seal rings are brittle and can be easily chipped or damaged.33
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 oxidise, reducing the viscosity.34
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?
Правильну відповідь:
The fillet radii.Ваша відповідь:
The oil holes.35
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.36
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.37
In a low pressure auxiliary boiler, what would be considered to be the maximum allowable chloride level of the boiler water?
Правильну відповідь:
300 PPM.Ваша відповідь:
50 PPM.38
Many large 2 stroke marine diesel engines are equipped with an auxiliary scavenge air blower. What is the purpose of this equipment?
Ваша відповідь правильна:
To provide combustion air at start up, during manoeuvring and low load running when the turbocharger delivery is insufficient.39
During an unmanned period on a UMS vessel the “low water level” alarm for the jacket cooling water system expansion tank activates. What action would you take as duty engineer?
Ваша відповідь правильна:
Answer the alarm, top up the tank and check the system for leakage before resuming unmanned operation.40
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.41
When a fire breaks out in the accommodation, cargo holds or on deck, who is in charge of the fire fighting operations?
Ваша відповідь правильна:
The Chief Officer.42
During a bomb search, which of the following is an important principle to follow?
Ваша відповідь правильна:
Do not touch any suspicious packages.43
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.44
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:
Правильну відповідь:
Poor fuel oil quality.Ваша відповідь:
High wear rate in one of the fuel injection pumps.45
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.46
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.47
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.48
For a Nitrite – Borate based cooling water treatment system, what would be considered to be the normal nitrite concentration limits for a correctly dosed system?
Ваша відповідь правильна:
1 500 – 3 000 ppm Nitrite.49
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.50
Under what circumstances would you remove guards and safety devices from machinery?
Ваша відповідь правильна:
During overhaul and maintenance procedures.51
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.52
PT-100 sensors are some times used with 3 or 4 wires. What is the reason for this?
Правильну відповідь:
Higher measuring accuracy.Ваша відповідь:
For fault indication.53
In a purifier assuming the separating temperature is correct, what is the probable cause of the processed oil containing water?
Ваша відповідь правильна:
The gravity disc is too small and/or the flow rate is too high.54
The correct time to synchronise is usually taken to be when the synchroscope reaches the “5 to 12” position and is rotating slowly clockwise. This to allow for:
Ваша відповідь правильна:
Circuit breaker operating time.55
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?
Правильну відповідь:
Re-pack the stuffing box loosely with the correct size packing at the earliest opportunity.Ваша відповідь:
Tighten up the gland as much as possible until the leakage stops.56
What function is this operational amplifier circuit performing?
Ваша відповідь правильна:
Inverting amplifier.57
What is the correct name of the tool shown in the illustration?
Ваша відповідь правильна:
Flat file.58
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.59
How many separate means of escape are provided from each fire zone above the bulkhead deck?
Ваша відповідь правильна:
At least two.60
What is generally considered as the minimum safe time period before opening a crankcase door after the oil mist detector alarm has activated and the engine has been stopped?
Ваша відповідь правильна:
After at least 20 minutes.61
Many large slow speed diesel engines operating on heavy fuel oil have a fuel injection system which features Variable Injection Timing. How does this affect engine operation?
Ваша відповідь правильна:
VIT increases engine efficiency by automatically maintaining the maximum cylinder pressure over part of the load range.62
After main power is restored (following a blackout), a timed sequential restart of motor driven auxiliaries is necessary to avoid:
Правильну відповідь:
Generator overload due to many motors starting at simultaneously.Ваша відповідь:
Overvoltage due to current surges.63
If a refrigeration system contains air, how would you remove it from the system?
Ваша відповідь правильна:
Pump the system down to the condenser, continue cooling water flow until the condenser is at the same temperature as the cooling water and vent off the air from the top of the condenser.64
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 generate an audible sound signal at the same frequency and amplitude as the vibration.65
What is the correct method to use for fitting a rolling contact bearing, such as a ball bearing, onto a parallel shaft?
Ваша відповідь правильна:
Gently heat the bearing in an oil bath and use a bearing puller to draw it onto the shaft.66
What is the objective of the merchant navy?
Ваша відповідь правильна:
To safely transport goods by sea.67
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.68
What is the correct name of the part highlighted in the illustration?
Ваша відповідь правильна:
Exhaust valve.69
The mandatory color of a hand flare is:
Ваша відповідь правильна:
Red.70
What would be the correct form of response to the question: “What kind of assistance do you require?”
Ваша відповідь правильна:
The correct form of response would be: “My vessel has a fire in the accommodation and we require fire-fighting assistance”.71
What type of construction material should be avoided regarding fire protection purposes? (SOLAS II-2/2.2.3).
Ваша відповідь правильна:
All combustible materials.72
During an unmanned period on a UMS vessel the “low water level” alarm for the jacket cooling water system expansion tank activities. What action would you take as duty engineer?
Ваша відповідь правильна:
Answer the alarm, top up the tank and check the system for leakage before resuming unmanned operation.73
Which muscle is the most persevering one in the body?
Ваша відповідь правильна:
The heart.74
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 1.75
Which of the following voltage levels would be regarded as high voltage likely to be found on a ship?
Правильну відповідь:
6,6 kV.Ваша відповідь:
690 V.76
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.77
It is common practice to connect a resistor over an alarm contact (see diagram) in many applications. Why is this connection used?
Ваша відповідь правильна:
To monitor the cable/wires for break.78
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.79
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.80