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單項(xiàng)選擇題

Before a marine diesel engine is started the cylinders and pistons must be （）.

A.cooled to appropriate temperature
B.warmed up gradually to appropriate temperature
C.opened up and renewed
D.ground and polished

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單項(xiàng)選擇題

Before "stand-by" is rung on the engine telegraph, it is usual to give the main engine （） ahead and astern.

A.a brief trial with turning gear
B.a brief trial on power
C.a long trial by steering gear
D.one minutes trial with windlass

單項(xiàng)選擇題

Bedplates are the （） of the engine, without the support of which the shaft alignment in particular, and engine structure as a whole, would inevitably be lost.

A.hull
B.projection
C.graphitization
D.foundation