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單項(xiàng)選擇題

The connecting rod is fitted between the crosshead and the crankshaftI t transmits the firing force, and together with the crankshaft converts the （）motion to a （）motion.

A.rotary；reciprocating
B.up and down；fore and aft
C.fore and aft；up and down
D.up and down；rotary

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單項(xiàng)選擇題

The intake ports of a two-strike/cycle diesel engine are opened and closed by the action of the （）

A.camshaft
B.piston movement
C.exhaust valves
D.vertical drive

單項(xiàng)選擇題

Valves in the cylinder head of a diesel engine are opened by the direct action of the（）

A.exhaust pressure
B.valve spring pressure
C.rocker arm movement
D.wrist pin movement