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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相关考题
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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
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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
