The operating diesel generators will have their exhaust temperatures, cooling water and lubricating oil temperatures and pressures （） in much the same way as for the main engine.

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• The camshaft on a four-stroke/cycle diesel engine provides a means to operate the （）.

  A . fuel injectors B . exhaust valves C . intake valves D . all of the above

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• In an operating diesel engine, which of the following condition is an indication of a leaking air starting valve?（）

  A . noise coming from that air starting valve B . continuous operation of the starting air compressor C . zero air pressure in the air starting system D . overheated starting air pipe to the cylinder head

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• The load sharing characteristics of two diesel generator operating in parallel are mostly dependent on their governor （）.

  A . load limit settings B . idle speed settings C . speed limit settings D . speed droop setting

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• Before engaging the turning gear and turning the diesel engine, which of the following operation should be done except （）

  A . open the indicator cocks B . supply some LO to cylinder liner wall with lubricator C . put the fuel handle in the "stop" position D . pump up the air bottle

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• A loud clicking noise from the valve compartment of an operating diesel engine would indicate（）

  A . worn valve seats B . worn main bearing C . excessive valve clearance D . weak rocker arm spring

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• The possibility of damage from operating a diesel engine at critical speeds is reduced by the use of（）.

  A . an isochronous governor B . elastic engine mounts C . a vibration damper D . a cast iron bed plate with good flexible qualitie

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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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• What causes diesel fuel to be ignited in the cylinder of an operating diesel engine?（）

  A . Spark plug B . Heat of compression C . Carburetor D . Glow ping

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• In a normally operating diesel engine, the main cause of lubricating oil contamination in the crankcase is a result of the （）.

  A . metal particles loosened by wear B . air when no air cleaners are used C . condensation of water vapors D . breakdown of the lubricating oil by dilutio

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• Which of the diesel engine components listed increase air density and helps to improve engine operating efficiency?（）

  A . Impeller B . Compressor C . After-cooler D . Exhaust differ

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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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• The satisfactory operation of diesel engine exhaust valves usually depends on（）

  A . the proper back pressure B . the cooling water temperature C . correct timing and proper seating D . accurate metering and the exhaust temperature

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• An individual injection pump is designed for variable beginning and constant ending of injectionFor diesel engines operating at constant speeds, the start of injection will（）

  A . advance as the load increases B . retard as the load increase C . remain unchanged regardless D . always occur at top dead center

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• How would the exhaust of a properly operating diesel engine appear?（）.

  A . Light blue haze B . Light brown haze C . Light gray haze D . Perfectly clear

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• Large, two-stroke/cycle, main propulsion, diesel engine cylinders can be successfully pressure charged during normal operation, by using the （）.

  A . exhaust gas temperature system B . exhaust load system C . constant or pulse pressure system D . constant volume system

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• Forcing the exhaust gases form the cylinder of an operating diesel engine with the aid of a blower is known as （）

  A . scavenging B . forced draft C . turbo-charging D . aspiratio

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• The pressure in an operating diesel engine cylinder continues to rise for a short period after the piston passes top dead center as a result of the （）

  A . expansion of the combustion gases B . exhaust and intake valves just closing C . maximum compression is just being attained D . fuel injection occurring at that point and combustion begi

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• When a diesel engine is operate at partial load, as compared to full load ,a decrease will occur in the average （）

  A . air quantity aspirated B . fuel injection pressure C . combustion pressure on the power stroke D . compression on the compression stroke

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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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• If a diesel engine is difficult to start and operates with the engine temperatures lower than normal, you should suspect that the （）.

  A . compression pressures are below normal B . lube oil is diluted with fuel oil C . cranking speed is too low D . exhaust system is partially restricted

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• The majority of medium speed and high speed marine diesel engines for main or auxiliary drive operate on the （） cycle.

  A . two-stroke B . four-stoke C . long-stroke D . short-stroke

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• The main operating characteristic of diesel engines which distinguishes them from other internal combustion engines is the （）

  A . method of supplying air B . cooling system C . method of igniting fuel D . valve operating mechanism

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• The marine diesel engine is a type of diesel engine used on shipsThe _____ of its operation is not very difficult to understand.

  A.principle B.principal C.cause D.case

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