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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 temperature of a refrigerant gas is the highest （）.

A.at the compressor discharge
B.at the compressor suction
C.in the expansion valve
D.in the receiver

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单项选择题

Which of the listed pressure control valves would be used to establish the maximum operating pressure of a hydraulic system?（）

A.Pressure-reducing valve
B.Unloading valve
C.Counterbalance valve
D.Pressure-relief valve

单项选择题

If a centrifugal bilge pump were continually operated with the discharge valve closed the （）.

A.motor overload would open
B.relief valve would open
C.pump would eventually overheat
D.motor would overheat

单项选择题

In order to accurately measure very low pressures, which of the instruments listed should be used?（）

A.Compound gage
B.Bonrdon tube
C.Manometer
D.Deadweight gage

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