單項(xiàng)選擇題

When one cylinder has a lower compression pressure and higher exhaust gas temperature than any of the other engine cylinders, which of the conditions listed will indicated?（）

A.Advanced ignition
B.Clogged air intake
C.Leaky exhaust valve
D.High exhaust pressure

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單項(xiàng)選擇題

Compared to a naturally aspirated diesel engine, a supercharged diesel engine has（）

A.a cylinder air charge of higher pressure
B.increased pumping losses
C.less valve overlap
D.reduced blow-by

單項(xiàng)選擇題

Late fuel injection occurring at, or after TDC in a diesel engine is indicated by excessive exhaust smoke and （）

A.low exhaust temperature
B.low firing pressure
C.fuel knock in each cylinder
D.mechanical knock in each cylinder

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