單項選擇題Fresh water is used for the cooling of cylinder jackets and () of the marine diesel engine.
A.cylinder covers
B.lubricating space
C.crosshead
D.exhaust manifold
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1.單項選擇題Four strokes consist of suction, compression, () and exhaust stroke.
A.combustion
B.condensation
C.charging
D.evaporation
2.單項選擇題For one or two types of engine,the piston and rod can be withdrawn downwards from the cylinder into the crankcase and then out through ().
A.the cylinder cover
B.the bottom of bed-plate
C.the sump
D.the crankcase door
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題型:單項選擇題