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
单项选择题 Permitting a diesel engine fuel oil day tank to run dry can cause （）
单项选择题 Water in the fuel can prevent the engine from starting, prevent it from developing full power, or （）
单项选择题 In a single acting, four-stroke/cycle diesel engine, the power impulse in an individual cylinder occurs （）
