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單項選擇題

The fourth engineer accompanied by the workers on oil barge measures the oil levels, temperature and （） in the tanks.

A.tank table
B.trim
C.water contents
D.oil pressure

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單項選擇題

The four-stroke engine is used for （） and sometimes for main propulsion with a gearbox to provide a propeller speed of between 90 to 120 rev/min.

A.alternator
B.turbo-charger
C.remote controller
D.windlass

單項選擇題

The four strokes are called suction, compression, expansion and exhaust, but only （） stroke provides the power to drive the ship.

A.suction
B.compression
C.expansion
D.exhaust

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