單項(xiàng)選擇題A four-stroke/cycle, 1000horsepower diesel engine fails to start at normal cranking speed with normal fuel pressure and ambient temperatureThe reason for the failure could be()

A.glazed liners or pistons
B.high lube oil pressure
C.excessive compression ratio
D.worn valve seats and valves


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1.單項(xiàng)選擇題In a main propulsion turbocharged diesel engine, the speed of the turbocharger varies according to the ()

A.governor droop
B.speeder spring tension
C.fuel rack lag
D.load on the engine

2.單項(xiàng)選擇題If you notice smoke coming fro the crankcase exhaust fan outlet of an operating diesel engine, you would suspect()

A.a cracked cylinder liner
B.clogged intake ports
C.broken piston rings
D.a faulty head gasket

3.單項(xiàng)選擇題When restarting a heavy fuel diesel engine that has been stopped for some time, the engine should()

A.increase the starting air pressure
B.use a higher than normal cranking speed
C.increase the fuel injection pressure
D.use a fuel having a lower ignition temperature

4.單項(xiàng)選擇題Water accumulation in the cylinder of a secured engine is an indication that the ()

A.soft water pump was not secured along with the engine
B.jacket water thermostat has failed
C.cylinder liner may be cracked
D.raw water pump is over-speeding just prior to engine shutdown

5.單項(xiàng)選擇題If a diesel engine turned over at normal cranking speed but failed to start, the cause could be late fuel injection or ()

A.excessive fuel pressure
B.high lube oil viscosity
C.inadequate fuel injection
D.excessive starting air pressure

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