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單項(xiàng)選擇題

The essential part of the diesel engine, whose function is to convert the heat energy into the mechanical power, is the （）.

A.crankshaft
B.piston
C.connecting rod
D.bearing

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單項(xiàng)選擇題

Among the main propulsion units on board the ship with the same capacity, the lightest one is（）.

A.steam engine
B.steam turbine
C.gas turbine
D.diesel engine

單項(xiàng)選擇題

The rotating range of the low speed diesel engine is usually lower than （）.

A.100 rpm
B.200 rpm
C.300 rpm
D.500 rpm

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