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單項選擇題

（） rods are not in proper condition so that too much fuel is supplied to the corresponding cylinder.

A.Piston
B.Sounding
C.Regulating
D.Connecting

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單項選擇題

（） is not properly set thus causing either advanced or retarded firing.

A.A piston
B.A fuel injection pump
C.A feed water pump
D.A lube oil pump

單項選擇題

（） the supercharge pressure is, （） power an engine develops.

A.The higher；the more
B.Higher；more
C.Higher；little
D.The higher；the less