第1题
A.decrease only
B.increase only
C.decrease slightly then returned to original speed
D.increase slightly then returned to original speed
第2题
Diesel engine air start valve timing is controlled by________.
A.engine operating speed
B.an air manifold
C.a hydraulic distributor
D.individual cams and valve gear
第3题
A.one half crankshaft speed in a two-stroke cycle diesel engine
B.crankshaft speed in a two-stroke cycle diesel engine
C.two times crankshaft speed in a two-stroke cycle diesel engine
D.one-fourth times crankshaft speed in a four-stroke cycle diesel engine
第4题
A.increase the governor oil pressure
B.adjust the speed droop setting
C.adjust the speeder spring travel
D.adjust the compensating needle valve
第5题
Why a gearbox is needed in a ship driven by a medium-speed diesel engine? .
A.To reduce the main engine speed
B.To increase the main engine speed
C.To govern the main engine speed
D.To fix the propeller shaft
第6题
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
第7题
A.one-half engine speed
B.the same as engine speed
C.twice engine speed
D.four times engine speed
第8题
A reduction in load on a diesel engine results in () of speed of the crankshaft
A.a reduction
B.an increase
C.a downwards
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