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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 general, domestic flesh water tank kept under pressure by an external supply of （）.

A.forced circulating pump
B.compressed air
C.gravity tank
D.bead tank

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The abbreviation "TDS" about the potable water probably means （）.

A.total dissolved solids
B.temperature of distillation of sea water
C.total dissolved sodium
D.total delivery system
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A condenser is a vessel in which（） is deprived of its latent heat of vaporization and so changed to its liquid state.

A.sea water
B.fresh water
C.vapour
D.gas
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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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