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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

The internal part of boiler should be cleaned by yard if found （）.

A.scaled
B.worn
C.deformed
D.rested

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单项选择题

At normal sea going, we use （） instead of donkey boiler.

A.a heater
B.a pre-heater
C.an exhaust gas boiler
D.the coal burning boiler

单项选择题

The soot blowers are operating in the oil fuel boiler the air/fuel ratio must （） throughout the action, and blowers greased after use.

A.be increased
B.be decreased
C.remain constant
D.either be increased or remain constant

单项选择题

Water evaporates or steam condenses at the saturation temperature, which depends upon the pressure, the higher the pressure （） the saturation temperature.

A.the more
B.the higher
C.the lower
D.the highest

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