單項選擇題

In a central cooling system, used in some modem ships, sea water is supplied to cool （）which will circulate to other individual cooler, greatly reducing the corrosion problems.

A.fresh water
B.sea water
C.cooling oil
D.emulsion

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單項選擇題

In a （） engine the charge of air in the cylinder before compression commences is above atmospheric pressure.

A.pressure charged
B.naturally aspirated
C.contaminated
D.high speed diesel

單項選擇題

If there is water in fuel oil, the revolution of the engine will （）.

A.decrease
B.increase
C.be dismantled
D.be reassembled