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單項選擇題

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

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單項選擇題

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

單項選擇題

On a large diesel engine installation, crankshaft axial alignment is maintained by the （）

A.piston rod guides
B.engine thrust bearing
C.crosshead bearing
D.main shaft flexible coupling

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