单项选择题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.单项选择题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

2.单项选择题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

3.单项选择题The operating speed of a turbocharger is directly dependent upon()

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

4.单项选择题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

5.单项选择题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

6.单项选择题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

7.单项选择题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

8.单项选择题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

9.单项选择题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

10.单项选择题A bronze bearing liner with a lead-tin flashing has a milky-white color over most of its surface and some areas of exposed bronze, the white coloring indicates()

A.proper break-in wear
B.improper break-in wear
C.relocation of the overlay flashing
D.water contamination of the lube oil system