單項(xiàng)選擇題In a four-stroke/cycle diesel engine, the camshaft rotates at ()

A.twice the crankshaft speed
B.half the crankshaft speed
C.the same speed as that of the crankshaft
D.a speed independent of that of the crankshaft


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1.單項(xiàng)選擇題A restricted air intake to a diesel engine may result in the engine ().

A.failing to reach rated speed
B.knocking under maximum load
C.hunting or surging under light load
D.overspeeding and running away

2.單項(xiàng)選擇題Temperature control valves installed in the jacket cooling water system of a diesel engine modulates the rate of water flow through the ().

A.cooling water pump
B.nozzle cooling passages
C.cylinder jackets
D.heat exchanger