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單項(xiàng)選擇題

Forcing the exhaust gases form the cylinder of an operating diesel engine with the aid of a blower is known as （）

A.scavenging
B.forced draft
C.turbo-charging
D.aspiration

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單項(xiàng)選擇題

In a four-stroke/cycle diesel engine, badly worn intake valve guides can cause excessive（）.

A.exhaust pressure
B.exhaust temperatures
C.cooling water temperatures
D.lube oil consumption

單項(xiàng)選擇題

Significant retardation of a diesel engine fuel injection timing will result in （）

A.smoother engine operation
B.advanced fuel ignition
C.increased fuel economy
D.reduced engine power

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