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Maison Tests en ligne CES Slow Speed 3rd-Eng/4rd-Eng Test for specialists working in Engine room (CES v6.0)
Tests en ligne : Test for specialists working in Engine room (CES v6.0)
Test en ligne
Description
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Le test comprend 80 questions aléatoires.
Total de questions sur ce sujet : 147
Total de questions sur ce sujet : 147
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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:
Synchroscope error.
Generator phase difference error.
Circuit breaker operating time.
Synchroscope pointer time lag.
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.
Under what circumstances would you remove guards and safety devices from machinery?
To allow the shaft to be seen to confirm the machine is running.
When they are rattling and vibrating.
During overhaul and maintenance procedures.
When the safety devices keep stopping the machinery.
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.
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.
Some large slow speed diesel engines have jack bolt arrangements for retaining the main bearing top keep in place rather than the more conventional stud bolts. How does this arrangement affect the maintenance and checking procedures for the tie rods on the engine?
The tie rods should be fully tensioned before the jacking bolts are loaded to avoid overload of the bearing caps and frame structure.
The tie rods and jacking bolts must be tightened simultaneously to avoid excess load on either component.
The jacking bolts should be fully loaded before the tie rods are tensioned to avoid excess loads on the tie rods.
It has no effect since the tie rods and jacking bolts have completely separate functions.
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.
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.
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.
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.
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 component does this graphical symbol illustrate?
PH analyzer.
Pressure indicator, installed on panel/console.
Pressure indicator, installed locally.
Pressure relief valve, self-contained.
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 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.
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.
What is the correct name of the part highlighted in the illustration?
Push rod.
Crankshaft.
Camshaft.
Connecting rod.
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:
30 minutes.
15 minutes.
60 minutes.
45 minutes.
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 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.
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.
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. The likely outcome is that:
Both motors trip out on overload.
A short circuit occurs between earth faults and the ventilation fan fuse blows.
A short circuit occurs between earth fault and the bilge pump fuse blows.
An open circuit occurs between earth fault and both motors trip out.
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 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.
What could cause diesel engine lubricating oil to appear cloudy with a slightly “milky” colour?
Fuel contamination of the system.
Oxidation of the oil.
High temperature of the oil.
Water contamination of the system.
During a bomb search, which of the following is an important principle to follow?
Throw any suspicious items overboard.
Try to reach behind bulkheads to find a bomb.
Do not touch any suspicious packages.
Know exactly what a bomb looks like.
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 is the correct name of the tool shown in the illustration?
Flat file.
Chisel.
Pliers.
Grinding machine.
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.
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.
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.
What cooling medium is normally used to cool the condenser of a fresh water generator?
Air.
Seawater.
Brine.
Distillate (freshwater).
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.
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.
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.
Thermistors are temperature sensitive devices. A positive temperature coefficient thermistor will typically have:
Relatively linear characteristic.
Inaccurate measurement.
Relatively non linear characteristic.
Variable reliability.
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.
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.
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.
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.
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°.
Which diagram is the symbol for a THYRISTOR?
Figure 3.
Figure 4.
Figure 2.
Figure 1.
What is the correct name of the part highlighted in the illustration?
Exhaust valve.
Fuel injector.
Air inlet valve.
Air starting valve.
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.
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?
3 000 – 4 500 ppm Nitrite.
1 500 – 3 000 ppm Nitrite.
0 – 1 500 ppm Nitrite.
4 500 – 6 000 ppm Nitrite.
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.
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?
Crosshead.
Liner.
Bottom end bearing.
Connecting rod.
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 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.
What precautions should be taken, in addition to shutting the main air start valve if work is to be carried out inside the main diesel engine crankcase?
Keep a man posted in the control room to stop anyone who tries to start the engine.
Engage the turning gear and put a notice at each engine control position.
Engage the turning gear, stop the starting air compressors and drain the air receivers.
Engage the turning gear and close every valve on the starting air receivers.
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.
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”.
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.
How many Radar Transponders (SART) are required to be carried onboard a ship for use in survival crafts?
One in each lifeboat.
2, one of which being capable of floating free if the ship sinks.
Two on each side of the ship.
One on each side of the ship.
The two instruments necessary for generator synchonising are:
kW meter and frequency meter.
Voltmeter and synchroscope.
Synchroscope and kVar-meter.
Amp-meter and volt-meter.
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.
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.
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.
What type of component does this graphical symbol illustrate?
Pressure-reducing regulator.
Pressure switch.
Pressure relief valve.
Flow controller.
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 correct name of the part highlighted in the illustration?
Push rod.
Connecting rod.
Main bearing.
Rocker Arm.
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.
What is the expansion ratio of the foam produced by the fixed low-expansion foam fire-extinguishing system of an engine room?
Less than 20 to 1.
Less than 5 to 1.
Greater than 20 to 1 but less than 50 to 1.
Less than 12 to 1.
What function is this operational amplifier circuit performing?
Integrator.
Differentiator.
Non-inverting amplifier.
Inverting amplifier.
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.
Give the meaning of the following symbol:
Indicates manual starting direction of the engine.
Start water spray.
Reverse engine.
Start engine.
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:
A short circuit occurs between earth faults and the ventilation fan fuse blows.
An open circuit occurs between earth fault and both motors trip out.
A short circuit occurs between earth fault and the bilge pump fuse blows.
Both motors trip out on overload.
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 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.
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”.
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.
What is the correct name of the part highlighted in the illustration?
Air cooler.
Turbocharger.
Crankshaft.
Cylinder head.
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.
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.
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.
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.
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:
30° behind.
0°.
90° lag.
30° ahead.
An electrical power emergency source in a ship is required because:
It satisfies the SOLAS requirements for ship safety.
The main diesel generator(s) can be taken out of service for overhaul or repair.
It satisfies the need to be environmentally “friendly”.
The ships total load can be shared between main and emergency generators.
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.
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.
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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