單項選擇題

The function of the after-cooler installed between the turbocharger and intake manifold on some diesel engine, is to （）

A.increase the density of the intake air
B.decrease turbocharger power usage
C.reduce exhaust gas temperature
D.compensate for turbocharger PRM fluctuations

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單項選擇題

High lube oil temperatures developing in a diesel engine can result from（）

A.high oil pressure
B.excessive bearing end play
C.plugged oil control rings
D.engine overload

單項選擇題

An increase in the fuel injection pump discharge pressure can be caused by a/an （）

A.leaking delivery valve
B.excessive bearing end play
C.plugged injector spray hole
D.increased plunger stroke

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