A.at the compressor discharge
B.at the compressor suction
C.in the expansion valve
D.in the receiver
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A.Pressure-reducing valve
B.Unloading valve
C.Counterbalance valve
D.Pressure-relief valve
A.motor overload would open
B.relief valve would open
C.pump would eventually overheat
D.motor would overheat
A.Compound gage
B.Bonrdon tube
C.Manometer
D.Deadweight gage
A.cavitation
B.water hammer
C.fluid friction
D.steam knock
A.sub-cooled liquid
B.high temperature liquid
C.oil saturated liquid
D.superheated vapor
最新試題
Who is responsible for ensuring that someone is assigned to close the watertight doors in an emergency?（）
If the suction pressure at the refrigeration compressor is below normal, the cause can be（）.
The amount of fluid friction or internal friction inherent in a mineral lubricating oil is reflected as a measure of its （）.
An increasing head pressure in a refrigeration system, without any corresponding change in the cooling water inlet temperature, would probably be caused by （）.
A salinity indicator is used to determine the （）.
The rate of heat transfer between the hot and cold fluids passing through a shell-and-tube type heat exchanger will （）.
The temperature differential occurring between the inlet temperature of the fluid to be cooled and the outlet temperature of the cooling medium in a shell-and-tube heat exchanger is greatest in which of the flow designs listed?（）
The major source of chemical contaminants in hydraulic fluid is （）.
Which of the listed pumps is NOT a positive displacement pump?（）
When a refrigeration compressor has developed a high head pressure as a result of a refrigerant overcharge, you should （）.