單項(xiàng)選擇題

The cooling of the piston is carried out by circulating （） across the underside of the crown and inside the ring belt or through specially shaped passages.

A.sea water
B.scavenging air
C.lubricating oil
D.fuel oil

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單項(xiàng)選擇題

The cooling liquid used for the cylinder may be referred to as （）.

A.jacket water
B.make-up water
C.boiler water
D.flushing water

單項(xiàng)選擇題

The cooler as the liquid becomes, （）.

A.the faster it will evaporate
B.the slower it will condense
C.the slower it will evaporate
D.the faster it will flow