單項選擇題

The purpose of the flywheel is to （）

A.provide energy to operate the engine between power impulses
B.neutralize the primary inertia force of the crankshaft
C.reduce the shock of starting loads on the main bearings
D.prevent the engine from operating at critical speed

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單項選擇題

While overhauling a jerk-type fuel pump it is necessary to replace the pump plungerWhich of the parts listed below must also be replaced?（）

A.Delivery check valve
B.Pump barrel
C.Tubing to the injector
D.Cam follower

單項選擇題

Combustion gases formed in the cylinder of a diesel engine are prevented from blowing past the piston by （）

A.cylinder valves
B.compression rings
C.piston skirts
D.oil rings