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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 > 船舶辅助机械

单项选择题

A （） boiler is an auxiliary boiler sometimes included in a steamships installation for supplying steam to auxiliaries in port.

A.monkey
B.donkey
C.waste heat
D.main

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Between the steam dram and the smaller water dram below, large numbers of smaller diameter （） tubes are fitted.

A.fire
B.water wall
C.generating
D.down comer
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The safety valve should be （） in the presence of C/E and Surveyor.

A.tightened up
B.sealed up
C.opened up
D.unscrewed
单项选择题
The safety valves are mounted in pairs to （） the boiler against overpressure.

A.use
B.release
C.protect
D.effect
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