A.rise
B.fall
C.be maintained constant
D.None of the above
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A.rise
B.fall
C.be maintained constant
D.None of the above is true
A.raised
B.risen
C.reduced
D.maintained constant
A.humidity
B.dry
C.steam
D.oil
A.condenser
B.regurgitate
C.evaporator
D.boil coil
A.liquid receiver
B.compressor
C.condenser
D.cooling coil
最新試題
A grease gun is generally used to lubricate a （）.
Which of the following problems could cause the high pressure cutout switch to shut down the compressor in a refrigeration system?（）
One cause of high head pressure occurring in a refrigeration system can be （）.
A gradual decrease in the discharge pressure of an operating hydraulic pump can be caused by （）.
Which of the following statements is correct concerning heat transfer?（）
A salinity indicator is used to determine the （）.
Pitting in the suction areas of a centrifugal pump bronze impeller is usually caused by （）.
An increasing head pressure in a refrigeration system, without any corresponding change in the cooling water inlet temperature, would probably be caused by （）.
If the relief valve on the discharge side of a hydraulic pump lifts, the cause could be （）.
When a refrigeration compressor has developed a high head pressure as a result of a refrigerant overcharge, you should （）.