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單項(xiàng)選擇題

Which will cause the high pressure cutout to stop the compressor in a R-22 system?（）

A.Condenser leakage
B.A shortage of liquid refrigerant
C.Excessive frost on the evaporator
D.Not enough condenser cooling water

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單項(xiàng)選擇題

Insufficient refrigerant in a refrigeration plant may result in （）.

A.high discharge pressure
B.frosting of the crankcase
C.high temperature of the overboard water
D.low suction pressure of compressor

單項(xiàng)選擇題

Air that may enter a refrigeration plant tends to collect in the （）.

A.upper part of the receiver
B.upper part of the condenser
C.down stream end of the cooling coil
D.outlet end of the condenser

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