你可能感興趣的試題

Ring groove inserts are occasionally used on aluminum alloy piston to（）

A.reduce the ring groove wear rate
B.seal against crankcase vapors
C.lessen the wear on aluminum part of the cylinder
D.allow for the greater expansion rate of aluminum

單項選擇題

A sudden drop in diesel engine cylinder compression pressure can be caused by（）

A.a leaking fuel injector nozzle
B.a clogged air filter
C.excessively early fuel injection
D.malfunctioning valves

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