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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)
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Тест состоит из 80 случайных вопросов.
Всего вопросов по данной теме: 147
Всего вопросов по данной теме: 147
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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.
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?
The oil holes.
The keyways.
The fillet radii.
The dowel pins and dowel holes.
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.
Zinc.
Aluminium.
Aluminium brass.
What would be the correct form of response to the question: “What kind of assistance do you require?”
The correct form of response would be: “There is a fire onboard my vessel”.
The correct form of response would be: “My vessel has a fire in the accommodation and we require fire-fighting assistance”.
The correct form of response would be: “I need help on board with a fire and the smoke is very toxic”.
The correct form of response would be: “I need help as soon as possible”.
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.
What is the correct name of the part highlighted in the illustration?
Push rod.
Connecting rod.
Main bearing.
Rocker Arm.
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.
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?
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.
Use a chain block to pull the pipe flanges into alignment and leave it in place after the bolts are fitted to avoid overstressing the bolts.
Use wooden wedges to force and hold the pipe into the correct position and then fit the bolts.
Force the pipe into position and then hammer the bolts into the holes to hold the pipe flanges into alignment.
You are starting to get low on water in the lifeboat. What should you do?
Use sea water.
Collect rain water.
Drink urine.
Mix sea water with 50 % fresh water.
What is the objective of the merchant navy?
To earn money for the shipowner.
To transport and deliver goods as quickly as possible.
To provide employment for persons who wish to become seafarers.
To safely transport goods by sea.
What is the correct name of the tool shown in the illustration?
Pliers.
Chisel.
Monkey wrench.
Padlock.
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.
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.
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.
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:
10 litters per nautical mile.
25 litters per nautical mile.
30 litters per nautical mile.
20 litters per nautical mile.
Give the meaning of the following symbol:
Indicates manual starting direction of the engine.
Start water spray.
Reverse engine.
Start engine.
How many separate means of escape are provided from each fire zone above the bulkhead deck?
One.
At least two.
At least three.
At least ten.
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.
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.
Which of the following alternatives summarise the benefits of using high voltage on ships?
Smaller conductors, machines and switchgear.
Smaller conductors, insulators and transformers.
Smaller cables and better power factors.
More efficient transformers and electrical machines.
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.
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 increases engine efficiency by automatically maintaining the maximum cylinder pressure over part of the load range.
VIT improves engine operation by automatically controlling the start of fuel injection when it detects a poor quality fuel.
VIT allows the ship’s engineers to alter the injection timing for each load setting with a simple single adjustment of the fuel rack.
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?
Double bottom tanks and floors.
Panting beams and stringers.
Collision bulkhead and deck.
Centreline bulkhead.
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.
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.
Which diagram is the symbol for a THYRISTOR?
Figure 3.
Figure 4.
Figure 2.
Figure 1.
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.
When a fire breaks out in the accommodation, cargo holds or on deck, who is in charge of the fire fighting operations?
The first officer arriving at the scene.
The first person arriving at the scene.
The person who is designated in the muster list.
The Chief Officer.
What is the approximate content of oxygen in air?
21 %.
99 %.
51 %.
11 %.
It is common practice to connect a resistor over an alarm contact (see diagram) in many applications. Why is this connection used?
To monitor the cable/wires for break.
To stabilise power consumption.
To avoid sparks on the contacts when opening and closing.
Enable measuring the total resistance of the circuit.
Where would you find out which fire sections are enclosed by “A” or “B” class divisions on a ship?
All the mentioned alternatives.
On the general arrangement plan.
On the capacity plan.
On the Ship’s fire control plans.
What is the correct name of the part highlighted in the illustration?
Crankcase relief valve.
Push rod.
Crankshaft.
Camshaft.
What is the correct name of the tool shown in the illustration?
Pliers.
Adjustable wrench.
Chisel.
Open end wrench.
When referring to onboard oil treatments using a centrifuge, what is meant by the term purification?
Separation of solid contaminants from a liquid during the process.
Separation of two insoluble liquids with different densities, and the removal of solids in the same process.
It is a general term applied to a process for cleaning oil using a centrifuge.
Separation of one insoluble liquid from another.
What is the correct name of the part highlighted in the illustration?
Crosshead.
Liner.
Bottom end bearing.
Connecting rod.
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?
It is neutral with a pH value of 7.
It is a pure mineral oil without any special additives.
It is strongly acidic.
It is strongly alkaline.
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°.
What is the correct name of the part highlighted in the illustration?
Air cooler.
Turbocharger.
Crankshaft.
Cylinder head.
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.
Which of the following is not a principle of heat transfer utilised in an oil fired steam boiler?
Forced convection.
Conduction.
Radiation.
Natural convection.
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.
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.
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.
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?
Tighten it as tight as possible using a flogging spanner and a hammer.
Tighten it 10 % more than the manufacturer’s recommendation using a torque wrench.
Tighten it to the manufacturer’s recommendations using a torque wrench.
Tighten it as tight as possible using a spanner and extension pipe.
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.
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?
Answer the alarm then block the alarm and change to manned engine room condition.
Answer the alarm then block the alarm function for later action and resume unmanned operation.
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.
What is meant by the term “feel over sequence” as applied to diesel engine operation following replacement of a crankshaft bearing?
Stopping the engine to check the bearing temperature after a short period of operation and repeating this procedure at increasing running intervals.
Running the engine at low load and gradually increasing the load over a period of 12 hours.
Stop the engine after 2 hours running to check the bearing temperature by running the hand over it.
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.
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.
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 is the period of validity of the Safety Management Certificate?
1 year.
5 years.
6 months.
2 years.
What could be the cause of a refrigeration compressor running continuously even though normal temperatures for the cold rooms have been reached?
Solenoid valve before the expansion valve stuck in closed position.
High-pressure cut-out is stuck in open position.
The differential pressure switch for the lubricating oil pressure cut-out is stuck in the closed position.
Low-pressure cut-out is stuck in closed position.
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.
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?
With the governor in operation open the compensation needle valve to introduce instability and disturb the engine load to make the governor hunt.
Overfill the governor with fresh oil to force all of the air out.
Drain the governor again and slowly refill with fresh oil.
With the governor in operation close the compensation needle valve and disturb the load to make the engine hunt.
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.
When you are calibrating an instrument what is the most common second step in the procedure?
Adjustment of Zero-point.
Check linearity.
Adjustment of range.
Adjustment of span.
Which one of the listed requirements regarding the stowage of a survival craft corresponds to present SOLAS regulations? Each survival craft shall be stowed:
In a secure and sheltered position and protected from damage by fire or explosion.
Wherever space is available.
In a state of readiness so that two crew-members can prepare for embarkation and launching in less than 15 minutes.
On the starboard side of the ship.
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?
The pipe should be returned to the shoreside workshop for modification or to be remade to the correct dimensions.
The ships engineer’s should use extra long bolts and pull the flanges together.
The ship’s engineers should fit extra thick joints between the flanges to fill the gap.
The ship’s engineers should manufacture a spacer piece to fit the gap.
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”.
What is the purpose of the ODME (Oil Discharge Monitoring Equipment) printer?
To prove that oil has been pumped overboard according to regulations.
To prove fault conditions in the ODME.
None of the mentioned.
To prove that the ODME system has been used.
What is the correct name of the part highlighted in the illustration?
Exhaust valve.
Fuel injector.
Air inlet valve.
Air starting valve.
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.
What is the correct name of the tool shown in the illustration?
Flat file.
Chisel.
Pliers.
Grinding machine.
Which muscle is the most persevering one in the body?
The heart.
None of the mentioned.
The lungs.
The liver.
What is the correct name of the tool shown in the illustration?
Water Pump Pliers.
Adjustable wrench.
Flexible pipe.
Padlock.
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.
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?
After at least 20 minutes.
After at least 5 minutes.
After at least 1 hour.
After at least 10 minutes.
Select the option which best describes the primary duty of a watch-keeping engineer:
The primary duty of a watch-keeping engineer is to maintain constant surveillance of the main engine and auxiliary machinery.
The primary duty of a watch-keeping engineer is to maintain the ship’s speed.
The primary duty of a watch-keeping engineer is to ensure that machinery spaces are properly manned.
The primary duty of a watch-keeping engineer is to maintain constant surveillance of the steering gear.
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.
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.
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 best method to use to remove heavy scale and fouling from the plates of a heat exchanger?
Use high-pressure cleaner with abrasive additives.
Soak the plates in recommended cleaning solution and then use a soft brush or pressure cleaner.
Use wire-brush metal scrapers and chipping guns.
Renew the plates.
What acton is required if the crankcase relief valve on an air compressor is operating and emitting an air and oil mixture?
Increase the lift pressure of the relief valve.
Overhaul the compressor unit.
Increase the flow of cooling water to the compressor and intercooler.
Place a drip can beneath the valve to collect any escaping oil.
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.
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?
If the gaps are too small the rings could scope the piston rod.
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.
If the gaps are too small then the flow of scavenge air through the gland would be reduced and the gland would overheat.
If the gaps were too small then no oil could pass up the piston rod to lubricate the sealing rings.
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.
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 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.
Which of the following instruments is normally part of a control-loop?
Transducer.
Plotter.
Gauge.
Indicator.
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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