單項(xiàng)選擇題

Hot gas bypass is one of the methods used to （）

A.relieve excessive compressor head pressure
B.produce flash gas at the expansion valve
C.reduce flooding of the receiver at low load
D.defrost the evaporator coils

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單項(xiàng)選擇題

Thermostatic expansion valves can be adjusted for （）

A.suction pressure only
B.head pressure only
C.superheat only
D.suction pressure and box temperature

單項(xiàng)選擇題

The receiver used in a refrigeration system（）

A.stores liquid refrigerant
B.collects non-condensable gases
C.allows refrigerant sub-cooling
D.prevents compressor surging