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Головна Онлайн-тести CES Slow Speed 3rd-Eng/4rd-Eng Test for specialists working in Engine room (CES v6.0)
Онлайн-тестування: Test for specialists working in Engine room (CES v6.0)
Виберіть режим роботи з тестом:
Навчання
Онлайн-тест
Опис
Відгуки
Тест складається із 80 випадкових питань.
Усього питань на цю тему: 147
Усього питань на цю тему: 147
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During maintenance of a pneumatically operated, diaphragm actuated control valve the diaphragm is found to be split. Select, from the options given, a suitable material to use to make a temporary replacement if there is no spare diaphragm available.
Natural rubber sheet of approximately the same thickness and elasticity as the original diaphragm material.
Cotton reinforced rubber insertion sheet of smaller thickness but similar strength as the original diaphragm material.
Natural rubber sheet of greater thickness and lower elasticity as the original diaphragm material.
Cotton reinforced rubber insertion sheet of approximately the same thickness but less elasticity than the original diaphragm material.
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.
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 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.
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.
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 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.
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 correct name of the part highlighted in the illustration?
Crosshead.
Liner.
Bottom end bearing.
Connecting rod.
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 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.
What is the correct name of the part highlighted in the illustration?
Air cooler.
Turbocharger.
Crankshaft.
Cylinder head.
What is the correct name of the tool shown in the illustration?
Pliers.
Chisel.
Monkey wrench.
Padlock.
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.
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.
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.
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.
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”.
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.
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.
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.
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.
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 component does this graphical symbol illustrate?
Pressure-reducing regulator.
Pressure switch.
Pressure relief valve.
Flow controller.
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.
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 correct name of the part highlighted in the illustration?
Crankcase relief valve.
Push rod.
Crankshaft.
Camshaft.
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 is the correct name of the tool shown in the illustration?
Water Pump Pliers.
Adjustable wrench.
Flexible pipe.
Padlock.
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.
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.
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.
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.
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.
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 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 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.
What do you understand by the order: “Move the pilot ladder to the other side?”
Move the pilot ladder to the other side, means: to move the pilot ladder further along nearer to the bow.
Move the pilot ladder to the other side, means: to rig another pilot ladder.
Move the pilot ladder to the other side, means: to change the position of the pilot ladder from the main deck to the fore deck.
Move the pilot ladder to the other side, means: to shift the pilot ladder to the opposite side of the ship.
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.
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.
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.
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 the correct name of the tool shown in the illustration?
Pliers.
Adjustable wrench.
Chisel.
Open end wrench.
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.
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.
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 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.
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.
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.
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.
Thermistors are temperature sensitive devices. A positive temperature coefficient thermistor will typically have:
Relatively linear characteristic.
Inaccurate measurement.
Relatively non linear characteristic.
Variable reliability.
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.
Which of the following voltage levels would be regarded as high voltage likely to be found on a ship?
6,6 kV.
690 V.
660 kV.
220 V.
What is the approximate content of oxygen in air?
21 %.
99 %.
51 %.
11 %.
Which muscle is the most persevering one in the body?
The heart.
None of the mentioned.
The lungs.
The liver.
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.
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.
What is the correct name of the tool shown in the illustration?
Flat file.
Chisel.
Pliers.
Grinding machine.
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.
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.
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.
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 ideal working temperature for physical work?
-10 °C.
10-15 °C.
21-35 °C.
17-20 °C.
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 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.
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.
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 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.
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.
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.
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.
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.
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.
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.
A detector that is activated by a rise of temperature is:
A thermic detector.
An optic detector.
A smoke detector.
A detector of radiation.
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.
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.
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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