單項(xiàng)選擇題When attempting to start a main propulsion diesel engine, the engine, the engine turns at the proper speed but will not startYou should check the（）

A.starting air pressure
B.scavenge air pressure
C.over-speed trip
D.banjo oiler line


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1.單項(xiàng)選擇題The speed of the turbocharger for a four-stroke/cycle diesel engine driving a generator at constant speed depends on the （）

A.engine speed
B.kilowatt load
C.fuel injection pressure
D.air intake manifold temperature

2.單項(xiàng)選擇題The operating speed of a turbocharger is directly dependent upon（）

A.engine speed
B.engine load
C.intake manifold pressure
D.atmospheric pressure

3.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

4.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

5.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