單項選擇題One result of operating a diesel engine at light load with excessively low cooling water temperature is a/an ()

A.decrease in ignition lag
B.increase in fuel economy
C.reduction in lube oil viscosity
D.increase in cylinder misfiring


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1.單項選擇題The plunger in a jerk pump is rotated until the release port is uncoveredIf the port remains uncovered all of the time, which of the listed operations will occur?()

A.No fuel will be delivered
B.The maximum effective stroke will be attained
C.The fuel delivered to the cylinder will be excessive
D.The injection nozzle will overheat and carbonize

2.單項選擇題If the compensating needle valve of a hydraulic governor is opened more than necessary the governor will ()

A.have a larger than normal dead band
B.produce excessive speed response to a load change
C.respond slowly to any change in engine load
D.stabilize engine speed at the new governor setting

3.單項選擇題The double bottom in a vessel is a space comprised of ()

A.plating forming the engine room tank top
B.doubler plating installed over the flat keel plate
C.a watertight boundary formed by the inner bottom
D.compartments between the inner and outer bottoms

5.單項選擇題Thermostatic steam pressure reducing valves are used in the fuel oil service system to control the()

A.double bottom fuel oil tank temperature
B.heater supply steam flow
C.pressure of the fuel supplied to the burners
D.attemperator steam flow in the heater discharge circuit

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To shut down a diesel engine after it exceeds the set maximum speed,which type of device listed should be used?()

題型:單項選擇題

When does auxiliary burner of incinerator put into operation? ()Ⅰ. start incinerator when it is coldⅡ. the sludge for dealing with is littleⅢ. the sludge for dealing with is largeⅣ. the water and impurity in sludge are too muchⅤ. the temperature in incinerator is lowⅥ. dealing with little solid rubbish

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Diesel engine air start system check valves are opened by ()

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If two A.C.generators are to be operated in parallel, the load is distributed evenly by()

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

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By comparing the exhaust gas temperature of each cylinder, the operator can determine if the load is balanced throughout the engine. The device most commonly used is a()

題型:單項選擇題

Which one is NOT the ‘clear grounds’ for a more detailed inspection?()

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A purge recovery system is used in a centrifugal air conditioning or refrigeration system to ()

題型:單項選擇題