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Главная Онлайн-тесты CES Slow Speed 3rd-Eng/4rd-Eng Test for specialists working in Engine room (CES v6.0)
Онлайн-тестирование: Test for specialists working in Engine room (CES v6.0)
Онлайн-тест
Описание
Отзывы
Тест состоит из 80 случайных вопросов.
Всего вопросов по данной теме: 147
Всего вопросов по данной теме: 147
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What is the main effect on lubricating oil of operating for long periods at excessively high temperature?
It will cause the oil to oxiside, increasing the viscosity.
It will cause the oil to oxidise, reducing the viscosity.
It will cause the oil to evaporate, increasing consumption.
It will change the flashpoint of the oil.
What is the correct method to use for fitting a rolling contact bearing, such as a ball bearing, onto a parallel shaft?
Use a hammer and a pipe with the same diameter as the inner bearing ring and knock the bearing onto the shaft.
Use emery cloth on the bearing surface on the shaft.
Use emery cloth on the inner ring (contact surface) of the bearing.
Gently heat the bearing in an oil bath and use a bearing puller to draw it onto the shaft.
Which of the following is not a principle of heat transfer utilised in an oil fired steam boiler?
Forced convection.
Conduction.
Radiation.
Natural convection.
What is the correct name of the part highlighted in the illustration?
Crosshead.
Liner.
Bottom end bearing.
Connecting rod.
Which diagram is the symbol for a THYRISTOR?
Figure 3.
Figure 4.
Figure 2.
Figure 1.
Personnel in a high voltage switchroom and smell rotten eggs. What may this indicate?
Burning of insulation.
Arcing at badly coupled bus bars.
Problems with a vacuum circuit breaker.
Problems with a gas (SF6) circuit breaker.
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?
No, the test should be carried out at system temperature.
Yes, the samples should be cooled to approximately 25 °C.
Yes, the samples should be cooled to approximately 50 °C.
No, the samples should be heated to approximately 95 °C.
What is the correct name of the part highlighted in the illustration?
Push rod.
Crankshaft.
Camshaft.
Connecting rod.
Which ships does the ISM code apply to?
Only passenger vessels.
All passenger ships, all cargo ships of 500 GRT or above.
Only tankers and Ro-ros.
All craft above 300 GRT.
What do you call the wide rung on a pilot ladder that prevents the ladder from twisting?
The wide rung on a pilot ladder that prevents it from twisting is called a “Spreader”.
The wide rung on a pilot ladder that prevents it from twisting is called a “Wide step”.
The wide rung on a pilot ladder that prevents it from twisting is called a “Long rung”.
The wide rung on a pilot ladder that prevents it from twisting is called a “Ani-twist rung”.
An important quantity which is useful in circuit analysis is known as conductance G (Siemens). Which of the formulas A to D expresses the conductance for this circuit?
G = 1/R.
G = 2R.
G = R·V.
G = I/R.
What do you understand by: “Let go the port anchor?”
Let go the port anchor means: slacken the port anchor cable.
Let go the port anchor means: put the port windlass brake in gear.
Let go the port anchor means: put the port windlass brake in gear and lower the anchor.
Let go the port anchor means: open the port windlass brake.
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?
Do not carry lighters or matches when working outdoors.
Always use gloves when using grinding machines.
Keep tools within easy reach during work.
Keep your working area clean and tidy.
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?
From the centre of the weight lifted.
From the position on the deck from which the weight was lifted.
From a position on the deck at the base of the derrick or crane.
From the head of the derrick or crane.
What would the First Engineer require?
The First Engineer would require the Chief Officer to keep him advised of bilge soundings.
The First Engineer would require the Fitter to check the carbon dioxide fire-fighting equipment.
The First Engineer would require cleaning of the feed water tank.
The First Engineer would require an inspection of the heating coils.
What is the correct name of the tool shown in the illustration?
Flat file.
Chisel.
Pliers.
Grinding machine.
What is the most important task after carrying out any major overhaul on a diesel engine?
Start the engine to check the direction of rotation.
Repair any damaged paint work on the engine.
A thorough check inside the engine to make sure all tools and cleaning rags have been removed.
Start the auxiliary blower to ventilate the engine so that it has sufficient fresh air for starting.
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?
Manually close each of the evaporator coils by switching off the electrical supply to the liquid line solenoid shut off valves and monitor the condenser pressure.
Close the condenser outlet valve and closely monitor the condenser pressure.
Gradually shut in the condenser cooling water valve or the condenser refrigerant inlet valve while closely monitoring the compressor discharge pressure.
Charge the system with refrigerant until the high pressure cut out operates.
What will be the probable outcome if the amplification is set too high on a controller?
The process will oscillate and get out of control.
The set-point will change.
Nothing.
The process response will be very slow.
What is likely to be the cause of black smoke from a diesel engine exhaust seen at the funnel?
Engine is burning some lubricating oil.
Too much combustion air.
Incomplete combustion of the fuel.
Water in the fuel.
You are witnessing someone about to faint. What are the symptoms?
The person may be very pale, and pulse is slow at first and weak.
The pulse is very fast and the person is getting cold.
The person starts to talk a lot and seems superactive.
Red face and big eyes.
What is the most important task after carrying out any major overhaul on a diesel engine?
Start the auxiliary blower to ventilate the engine so that it has sufficient fresh air for starting.
Start the engine to check the direction of rotation.
A thorough check inside the engine to make sure all tools and cleaning rags have been removed.
Repair any damaged paint work on the engine.
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?
Mild steel.
Aluminium brass.
Aluminium.
Zinc.
With two alternators running in parallel, and one is to be disconnected. The first step is to:
Remove the load from the alternator to be stopped.
Increase the frequency on the switchboard.
Trip the main circuit breaker.
Make sure the load is evenly shared.
Why may wearing sweat rags slung round your neck when working in the machinery spaces be hazardous?
The rags may cause sweat rash.
The rags may cause you to get too hot and faint.
The rags may be soaked with oil and catch fire.
The rags may be caught by running machinery or power tools.
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:
90° lag.
30° ahead.
30° behind.
0°.
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?
The filter may rupture due to the high pressures generated by the sample pump.
Pressure variations in the sample chamber can cause errors so restrictions must be kept to a minimum.
The pressure drop across the filter may damage the sampling pump.
A high flow rate is required in order to deflect the sensing element.
A ship has a medium speed engine and a controllable pitch propeller propulsion system. What would the propeller pitch normally have to be at to allow starting of the engine?
10 % ahead.
25 % ahead.
25 % astern.
Zero.
On finding a person apparently unconscious in a High Voltage switch room, which of the following should be done?
Raise alarm then drag the victim clear so that they cannot reach live parts while receiving aid.
Check if the victim is in contact with live parts and if not apply first aid.
Raise alarm, identify means of isolation and apply before approaching victim.
Trip all breakers and approach victim.
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?
Use the full hoist facility on the crane to “break” the motor free after slackening all of the retaining bolts.
Use the “inch up” facility on the crane to “break” the motor free after slackening all of the retaining bolts.
Use a suitable chain block suspended from the crane hook to “break” the motor free after slackening all of the retaining bolts.
Use the full hoist facility to lift the motor clear in one action after removing all of the retaining bolts.
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?
To tie them open with a rope to prevent the heat from building up inside, and making it uncomfortable to work.
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.
Wedge them open with an arrangement which allows them to be closed quickly in the event of a fire.quickly.
Is it always possible to use the word “ship” instead of the word “boat”?
A large vessel is always called a “ship” and never a “boat”.
Normally a small vessel is called a “boat” rather than a “ship”, otherwise it is not important.
Either can be used anytime.
A boat can only be used for vessels under 50 metres in length.
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:
Insufficient cooling of the main bearings.
Poor fuel oil quality.
High wear rate in one of the fuel injection pumps.
One of the fuel cams is worn.
What function is this operational amplifier circuit performing?
Integrator.
Differentiator.
Non-inverting amplifier.
Inverting amplifier.
Why is it important to check the timing of diesel engine cylinder oil lubricators?
To ensure the piston is not covering the lubrication points and blocking the flow of cylinder lubricating oil into the cylinder.
To ensure cylinder lubricating oil enters the cylinders when the piston is in the required position.
To ensure the correct amount of cylinder lubricating oil is fed into the cylinders.
To avoid excess pressure in the cylinder lubrication system.
Why is it important to check the timing of diesel engine cylinder oil lubricators?
To ensure the piston is not covering the lubrication points and blocking the flow of cylinder lubricating oil into the cylinder.
To ensure the correct amount of cylinder lubricating oil is fed into the cylinders.
To ensure cylinder lubricating oil enters the cylinders when the piston is in the required position.
To avoid excess pressure in the cylinder lubrication system.
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?
VIT increases engine efficiency by automatically maintaining the maximum cylinder pressure over the entire load range.
VIT allows the ship’s engineers to alter the injection timing for each load setting with a simple single adjustment of the fuel rack.
VIT increases engine efficiency by automatically maintaining the maximum cylinder pressure over part of the load range.
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?
This is prohibited.
3 miles.
12 miles.
25 miles.
What is the main advantage of having a central cooling system fitted on board ship?
It should require less maintenance than a conventional system using only sea water.
It is a simple system with minimum control requirements.
It does not require any seawater.
Only one heat exchanger is needed for all cooling duties.
If a refrigeration system contains air, how would you remove it from the system?
Pump the system down to the evaporator and keep the fan running until the evaporator is at ambient temperature and vent off the air from the top of the evaporator.
Stop the compressor and vent the air from the crankcase.
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.
Stop the compressor and undo a pipe coupling at the highest point in the system to vent off the air.
What do you understand by: Bitter end?
Bitter end means: the end link of an anchor cable that is secured within the chain locker.
Bitter end means: a foul taste at the end of a meal.
Bitter end means: to the very last moment.
Bitter end means: the toggled end of a lifeboat painter.
In a diesel engine lubrication system the circulating pump normally takes suction from the oil sump tank. Where would the oil normally pass to directly after the pump?
Lube oil cooler.
Main thrust bearing.
The engine bearings.
Gravity feed tank.
What is the meaning of “make fast”?
To act quickly.
To avoid all meals.
To secure a rope.
To coil a rope.
What effect does an increased oil feed flow rate have on the performance of a centrifuge operating as a purifier?
Separating efficiency is unchanged.
Separating efficiency is increased, more water is removed.
Separating efficiency is increased, more solids are removed.
Separating efficiency is reduced.
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?
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.
As long as the two coupling halves are at the same height the flexible coupling will accommodate any horizontal misalingment of difference in the gap between the coupling faces.
The compressor and motor can just be placed directly on the common skid as they will probably be closely aligned anyway.
Machines using flexible couplings and resilient mountings do not need to be aligned. That is why they have flexible and resilient elements fitted.
What is the main reason for keeping engine lubricating oil viscosity within recommended limits?
To reduce system pressure losses.
To ensure the strength of the oil film is sufficient to keep lubricated surfaces apart.
It is not important.
To neutralise any acids that may form.
What cooling medium is normally used to cool the condenser of a fresh water generator?
Air.
Seawater.
Brine.
Distillate (freshwater).
Many large 2 stroke marine diesel engines are equipped with an auxiliary scavenge air blower. What is the purpose of this equipment?
To provide combustion air at start up, during manoeuvring and low load running when the turbocharger delivery is insufficient.
To allow full load running when the main turbocharger is defective.
To assist the main turbochargers in supplying combustion air when on full load.
To help cool the engine after it has been stopped.
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?
Answer the alarm then block the alarm function for later action and resume unmanned operation.
Answer the alarm then block the alarm and change to manned engineroom condition.
Answer the alarm and adjust the alarm set point for the water level in the expansion tank before resuming unmanned operation.
Answer the alarm, top up the tank and check the system for leakage before resuming unmanned operation.
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?
Fit an equal number of shims behind each guide bar which should result in equal clearances between the guide bars and shoes along the whole length.
Turn the engine so that the piston for the cylinder concerned is at TDC and measure the clearance along the length of each bar and shoe and fit shims to equalise the clearances.
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.
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.
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?
To tie them open with a rope to prevent the heat from building up inside, and making it uncomfortable to work.
Remove the auto closing device so they remain in whatever position.
Wedge them open with an arrangement which allows them to be closed quickly in the event of a fire.
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.
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?
Wedge a bar between the piston top and the bottom of the injector and use the turning gear to force the injection valve out.
Replace the complete cylinder cover with a spare unit and land the cover with the jammed valve ashore for repair in a specialist workshop.
Remove the cylinder cover and try and drive the injection valve out of the pocket from the underside with a hammer and punch.
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.
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?
Lengthen the cord for the indicator drum drive.
Change the indicator spring for one with a higher rating.
Shorten the cord for the indicator drum drive.
Lubricate the indicator piston and cylinder.
An auxiliary engine is fitted with a duplex type lubricating oil filter. The in-use element requires changing. What procedure should be used to fit the new element?
With the engine running, position the changeover cock so that both filters are in use to reduce the pressure before.
With the engine running, shut off the filter inlet and quickly fit the new element.
The engine must be stopped to fit a clean filter element.
With the engine running, change over to the other filter after priming it and replace the dirty element after checking there is no pressure on dirty filter housing.
Which of the following fittings shall be provided to all lifeboats?
A manually controlled lamp fitted on the outside.
A remotely operated steering arrangement.
An electric power starting system for the propulsion engine with one rechargeable energy source.
Permanent boarding arrangements on both sides to enable persons in the water to board the lifeboat.
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?
The piston ring gaps can be kept in line to control the gas pressure on each of the rings.
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.
It avoids the risk of the ends of the piston rings being forced out by the gas pressure and catching on the scavenge ports.
It ensures the rings cannot be mixed up and that they are fitted in the correct order on the piston.
What type of construction material should be avoided regarding fire protection purposes? (SOLAS II-2/2.2.3).
All combustible materials.
All uncovered wooden materials.
All composite materials.
All plastic materials.
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?
The seal rings are hard and may score the pump shaft.
The spring and bellows for the seal can be easily damaged.
The seal rings are brittle and can be easily chipped or damaged.
The rubber O rings for the seal can be easily damaged.
When you join a new ship, how are you informed about safety rules, alarm instructions and your own duties in case of an emergency?
By folder distributed to each crewmember.
By muster list exhibited in conspicuous places.
By alarm instructions in all crew cabins.
By oral instructions by the Captain.
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?
The piston ring gaps can be kept in line to control the gas pressure on each of the rings.
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.
It avoids the risk of the ends of the piston rings being forced out by the gas pressure and catching on the scavenge ports.
It ensures the rings cannot be mixed up and that they are fitted in the correct order on the piston.
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?”
To all seafarers.
To officers only.
To all ratings.
To deck hands mainly.
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?
The wrong type of lubricating oil has been used.
Damaged rotor shaft sealing bushes allowing exhaust gas to leak into the bearing housing.
The turbine end bearing is badly worn.
The lubricating oil filling connection screw cap is missing.
What is the period of validity of the Safety Management Certificate?
1 year.
5 years.
6 months.
2 years.
What type of component does this graphical symbol illustrate?
Pressure-reducing regulator.
Pressure switch.
Pressure relief valve.
Flow controller.
What is the correct name of the tool shown in the illustration?
Water Pump Pliers.
Adjustable wrench.
Flexible pipe.
Padlock.
A detector that is activated by a rise of temperature is:
A thermic detector.
An optic detector.
A smoke detector.
A detector of radiation.
What is the ideal working temperature for physical work?
-10 °C.
10-15 °C.
21-35 °C.
17-20 °C.
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?
To block out any noise or vibration from the surrounding engine room.
To generate an audible sound signal at the same frequency and amplitude as the vibration.
To isolate a single frequency of vibration associated with one of the pumps components.
To sum up all the harmonics of a base frequency to give total vibration for all of the pump’s components simultaneously.
In a purifier assuming the separating temperature is correct, what is the probable cause of the processed oil containing water?
The back pressure at the clean oil outlet is too high.
The gravity disc is too small and/or the flow rate is too high.
The throughput is too low.
The gravity is too large.
What does the term “Dead Ship” mean?
“Dead Ship” means that the ship cannot make way through the water.
“Dead Ship” means that the ship is aground.
“Dead Ship” means that the machinery and boilers are inoperational due to lack of electrical power.
“Dead Ship” means that auxiliary machinery is not operational.
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?
Tighten up the gland as much as possible until the leakage stops.
Ensure the bilge well to which the leakage is draining is regularly pumped out.
Re-pack the stuffing box loosely with the correct size packing at the earliest opportunity.
Fit an extra ring of oversize packing to the stuffing box at the earliest opportunity.
Give the meaning of the following symbol:
Indicates manual starting direction of the engine.
Start water spray.
Reverse engine.
Start engine.
What action should be taken by the engine room rating if a piece of machinery is not functioning properly?
If machinery does not function properly, the Chief Engineer should be called out immediately.
If machinery does not function properly, it should be immediately stopped every time.
If machinery does not function properly the duty Engineer should be informed immediately so that plans for further action can be made.
If machinery does not function properly, it should be stopped and serviced immediately.
A flame detector is activated by:
Smoke, gas, sparks and high temperature.
The radiation of heat given off by flames.
The rise of the environment temperature.
The infrared radiation and ultraviolet radiation given off by flames.
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?
The spring and bellows for the seal can be easily damaged.
The rubber O rings for the seal can be easily damaged.
The seal rings are hard and may score the pump shaft.
The seal rings are brittle and can be easily chipped or damaged.
Which of the options represents the best action to take when an item of machinery, which normally operates in automatic mode, is operated in “manual” mode?
Keep the Chief Engineer informed of machines performance on an hourly basis.
Have someone permanently stationed at the machine in case of an operational problem.
Monitor the operation of the machinery on a frequent basis.
Change over all other machinery to manual mode of operation.
PT-100 sensors are some times used with 3 or 4 wires. What is the reason for this?
Higher mechanical strength of the cable.
For fault indication.
Because of power-consumption.
Higher measuring accuracy.
Personnel in a high voltage switchroom smell ozone. Which of the following is the likely cause?
Air circuit breaker problems.
Arcing at badly connected bus bars.
Vacuum circuit breaker problems.
Transformer overload.
What are the lists called that give the position and task during a lifeboat drill for all persons on board the ship?
The Crew List.
The Muster List.
The Duty List.
The Drill List.
This device can detect a package of drugs inside a large delivery of ship’s stores. What is it?
Security container.
Pallet scanner.
Access control system.
Vapour detector.
The subject “Engine, Operational, Slow Speed” covers both theoretical and practical aspects of safely working with electrical equipment. Mastery of this material is a direct indicator of an employee’s competence in holding a relevant position aboard a vessel. A sailor in the engine department is responsible for maintaining and adjusting engine components, cooling systems, fuel delivery systems, and other related equipment. They are also tasked with monitoring the operation of all machinery, carrying out regular technical inspections, and performing necessary repairs. When handling a low-speed control system (SU), the sailor ensures precise and safe navigation of the vessel, following the captain’s instructions and navigational charts.
- Test type: STCW.
- Version: 6.0.0, 6.0.13.
- Department: Engine.
- Level: Operational.
- Engine: Slow speed.
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