单项选择题

The purpose of an oil mist detector in a main propulsion diesel engine is to warn of （）

A.excessive mist density in the crankcases
B.excessively high crankcase vacuum
C.excessively high bearing temperature
D.excessive carbon buildup in the lube oil

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单项选择题

Permitting a diesel engine fuel oil day tank to run dry can cause （）

A.overheated injection pumps
B.water condensation in the cylinders
C.fuel dilution of the lube oil
D.air in the fuel system

单项选择题

Water in the fuel can prevent the engine from starting, prevent it from developing full power, or （）

A.run at an irregular speed
B.create high lube oil temperature
C.cause the engine to over-speed
D.cause blue smoke in the exhaust

单项选择题

In a single acting, four-stroke/cycle diesel engine, the power impulse in an individual cylinder occurs （）

A.once every crankshaft revolution
B.once every two crankshaft revolutions
C.once every piston stroke
D.twice every piston stroke