A.compressor damage from improper lubrication
B.refrigerant absorption by the lubricant
C.increased viscosity in the lubricant
D.carbon deposit on the compressor suction valves
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A.Spring-centered valve
B.Unloading valve
C.Three-position valve
D.Two-position valve
A.Expansion valve
B.Condenser
C.Evaporator
D.Compressor
A.The condenser and the expansion valve
B.The king valve and the solenoid valve
C.The compressor and the expansion valve
D.The condenser and the solenoid valve
A.temperature and pressure
B.humidity and temperature
C.pressure and vacuum
D.pressure and humidity
A.capacity of 0%
B.efficiency of 100%
C.internal slippage of 0%
D.shut off horsepower rating of 100%
A.series of baffles
B.crossover pipe
C.condensate separator
D.drain pump
A.at the compressor discharge
B.at the compressor suction
C.in the expansion valve
D.in the receiver
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
最新试题
Low compressor head pressure in a refrigeration system can be caused by().
Which of the listed pumps is NOT a positive displacement pump?()
The amount of fluid friction or internal friction inherent in a mineral lubricating oil is reflected as a measure of its ().
An internal bypass is provided on some hydraulic system suction strainers to help reduce the possibility of ().
The usual symptoms of cavitation in a centrifugal pump is ().
If the thermal bulb of an expansion valve is incorrectly placed at the center of the coil instead of the end, it will ().
The rate of heat transfer between the hot and cold fluids passing through a shell-and-tube type heat exchanger will ().
Heavy wear in a particular area of the inner circumference of a packing ring may be caused by ().
The general purpose of a heat exchanger is to ().
The output volume of a positive fixed displacement pump can be changed only by ().