单项选择题

White smoke exhausting from a diesel engine can result from （）

A.high exhaust temperature
B.high lube oil temperature
C.low turbo-charger speed
D.low cooling water temperature

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单项选择题

White smoke exhausting from an operating diesel engine may indicate （）

A.a cracked liner
B.burning lube oil
C.an overloaded engine
D.insufficient combustion air

单项选择题

The over-speed trip installed on most diesel engine will stop the engine by shutting off the （）

A.water supply
B.fuel oil supply
C.lube oil supply
D.exhaust damper

单项选择题

The blower type crankcase ventilation system （）

A.removes combustible gases in the crankcase
B.prevents the formation of combustible gases in the crankcase
C.cools lubricating oil
D.improves cold weather starting