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%
最新試題
An excessive charge of refrigerant in an air-cooled refrigeration system can cause （）.
An internal bypass is provided on some hydraulic system suction strainers to help reduce the possibility of （）.
Heavy wear in a particular area of the inner circumference of a packing ring may be caused by （）.
Which of the problems listed would came the discharge temperature of an R-12 refrigeration compressor to increase?（）
The usual symptoms of cavitation in a centrifugal pump is （）.
A pressure drop through the refrigerant liquid line may cause （）.
A salinity indicator is used to determine the （）.
Which of the following problems could cause the high pressure cutout switch to shut down the compressor in a refrigeration system?（）
When a refrigeration compressor has developed a high head pressure as a result of a refrigerant overcharge, you should （）.
If the suction pressure at the refrigeration compressor is below normal, the cause can be（）.