单项选择题

A dirty lube oil strainer can result in（）

A.crankcase
B.low lube oil temperature
C.excessive oil consumption
D.low bearing oil pressure

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单项选择题

A.cam action
B.spring force
C.fuel oil pressure
D.firing pressure

单项选择题

A.An open vent in the cooling system
B.A fouled sea chest
C.A restricted water passage in the engine
D.Air entrained in the cooling water

单项选择题

A.injection pressure
B.shape of combustion space
C.turbulence in combustion space
D.all of the above