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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

As for turbine oil, contact with water in the form of steam will be inevitable so good （） properties will be essential.

A.defrosting
B.de-oiling
C.demulsifying
D.dehumidifying

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单项选择题

Any carbon built up on surfaces must be washed away by （） additives and held in suspension by a （） additive.

A.dispersant；detergent
B.detergent；dispersant
C.dispersant；dispersant
D.detergent；detergent

单项选择题

The （） of an oil refers to its ability to mix with water and then release the water in a centrifuge.

A.oxidation resistance
B.carbon-forming tendency
C.demulsibility
D.acidity

单项选择题

Obviously, for a given fuel oil, its pour point is （） its cloud point.

A.lower than
B.higher than
C.as same as
D.better than

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