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全部科目 > 水路交通运输技能考试 > 海船船员考试 > 船舶管理(轮机专业) > 轮机英语 > 船舶电气与船舶安全

单项选择题

In more recent years, （） heat exchangers have frequently been employed for jacket water and oil cooling.

A.shell and tube type
B.plate type
C.coil type
D.conical disc type

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To avoid impingement attack, care must be taken with the water （） through the tubes of the heat exchangers.

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A non-return valve in the air delivery line near to the compressor must be （）type similar to the compressor discharge valve.

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