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單項選擇題

A piston in a four-stroke/cycle diesel engine makes four strokes during each （）.

A.crankshaft revolution
B.mechanical cycle of operation
C.period of two combustion cycles
D.cycle of two events

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單項選擇題

The effective stroke of a constant-stroke, individual, fuel injection pump is varied by the （）.

A.control rack
B.delivery valve
C.governor speed
D.plunger crossbar

單項選擇題

The ability of a fuel particle to travel into the combustion chamber before burning is called （）.

A.penetration
B.permanence
C.turbulence
D.atomization