If the engine of a survival craft does not start，check to see（）.

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• If the speed of a turbocharged diesel engine is maintained constant the turbocharger speed will （）

  A . decrease until the engine speed increases B . increase as the load increases C . decrease as the load D . increases remain unchanged

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• If a diesel engine fails to start，one of the likely causes is （）

  A . low compression temperature B . low ambient air pressure C . high lube oil pump pressure D . high fuel oil booster pump pressure

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• If a diesel engine has been stopped because of piston seizure due to severe overheating, the crankcase（）

  A . inspection covers should not be opened until the engine has cooled B . ventilation system should be continued in operation for one hour for cooling C . scavenge pump should be immediately secured to prevent loss of lube oil D . explosion covers should be opened slightly to provide extra ventilatio

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• If the operating element of a thermostatic valve installed in a diesel engine cooling system malfunctions, it may result in （）

  A . a low level in the engine expansion tank B . excessively high coolant pressure C . improper temperatures D . malfunctioning of the jacket water heater

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• If a four-stroke/cycle diesel engine is started by injecting air into the cylinder, the pistons receiving the charge of starting air must be（）

  A . on the power stroke B . on the exhaust stroke C . at the end of the power stroke D . at the start of the intake stroke

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• If the main engine of an unattended engine room shuts down automatically, it will be indicated by an alarm （）.

  A . at each control station B . in the chief engineer’s quarters C . in the captains quarters D . All of the above are correct

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• If the turbocharger of a four-stroke/cycle diesel engine fails to operate, which of the following statements best describes the probable effect?（）

  A . Intake manifold pressure will be high B . Intake manifold pressure will be unaffected C . Exhaust temperatures will be high D . Exhaust temperatures will be low

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• If water is found in the crankcase of a diesel engine, the cause may be due to（）

  A . a cracked cylinder head B . a leaky cylinder head gasket C . a cracked cylinder liner D . any of the above

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• Which of the following problems may occur if the opening pressure of a fuel injection nozzle is greater than specified by the engine manufacturer?（）

  A . The amount of fuel injected will be increased B . The start of injection will be retarded C . The nozzle will permit fuel to dribble D . The spray pattern will be distorted

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• If an air compressor is used to supply compressed air to outlets throughout the engine room and on deck of a vessel, the system is known as the （）.

  A、combustion control air system B、supply air system C、ships service air system D、low pressure deck air system

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• Fuels of different qualities may require advancing or retarding the injection timing, in addition to which if the injection timing is advanced when the engine is running at loads below the （）, then a saving in fuel can be achieved.

  A . BHP B . MCR C . IHP D . MEP

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• If a diesel engine runs roughly, which of the systems listed is most likely to be at fault?（）

  A . Fuel B . Lubricating C . Cooling D . Ignitio

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• If the action of the engine indicates that some of the cylinders are not firing, the ones affected may be determined by watching （）.

  A . the bad smoke B . the smoky exhaust C . the exhaust temperature D . the peak pressure

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• If a four-stroke/cycle diesel engine is running at 1550 RPM, the speed of the camshaft will be（）.

  A . 525 RPM B . 775 RPM C . 1550 RPM D . 1800 RPM

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• If the engine is naturally aspirated, or is a small high-speed type with a centrifugal turbocharger, the period of valve overlap（）,ie when both valves are（）, will be and the exhaust valve will close some 10°top dead canter（）.

  A . open；short；after B . closed；short；after C . open；long；before D . closed；long；before

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• The power output of a turbocharged diesel engine will drop if the cooling water flow through the after-cooler is interrupted because the （）.

  A . turbocharger stalls B . exhaust pressure increases C . air charge density decreases D . scavenge effect increase

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• If the engine can be started and maneuvered on high viscosity fuel, the （）of the fuel reaching the injectors should be raised to such a point that the viscosity is less than the required value, ie27c St.

  A . pressure B . temperature C . viscosity D . density

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• During the running of the diesel engine, if the supply of cooling water is interrupted or the temperature of cooling water out of the cylinder is too high, the duty engineer should （）

  A . notify the duty officer, reduce the engine speed, take some measures to remove failures B . notify the duty officer and stop the engine immediately, find the cause and remove failures C . notify the C/E D . notify the captai

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• If the coolant temperature of a closed cooling water system for a diesel engine gradually increases, the trouble usually is （）

  A . a broken shaft on the freshwater pump B . an excessive accumulation of scale exchanger C . an incorrect thermostatic element operating range D . lube oil in the cooling water

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• If over a period of weeks the air-box pressure of a turbo-charged, diesel engine, operating at full load, appears to be dropping off, the cause can be （）.

  A . open air-box drains B . loss of cooling water to the diffuser C . gradual fouling of the air filters D . improperly timed exhaust valve

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• Which of the following conditions will develop if the flow of ‘raw’ cooling water to diesel engine is obstructed?（）

  A . Air will enter the cooling system B . Carbon will plug the water cooled exhaust manifolds C . The jacket water temperature will rise D . The lube oil viscosity will increase

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• If it becomes necessary to cutout an individual cylinder of a large, low-speed, main propulsion diesel engine, the fuel to that cylinder should be secured and its （）

  A . fuel pump should be removed and all connections blanked off B . cylinder oil feed rate should be increased slightly above that used at normal sea speed C . cylinder oil feed rate should be reduced D . cylinder oil feed rate should be increased to the maximum flow capable of the metering pum

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• If the scavenge fire is of a more major nature, if there is a risk of the fire extending or if the scavenge trunk is adjacent to the crankcase with risk of a hot spot developing it sometimes becomes necessary to （）the engine.

  A . stop B . start C . speed up D . slow dow

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• The power output of a turbocharged diesel engine will drop if the cooling water flow through the after-cooler is interrupted because the _____.

  A.turbocharger stalls B.exhaust pressure increases C.air charge density decreases D.scavenge effect increases

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