单项选择题
“Flooding back” is a condition where the liquid refrigerant （）.
A.vaporizes in the condenser B.reaches the compressor through the suction line C.flashes in the liquid line D.condenses in the receiver
单项选择题 Thermal energy in transition is also referred to as （）.
单项选择题 Noise in a refrigeration compressor can be caused by （）.
单项选择题 The air charge leaving an intercooler, or after-cooler of an air compressor can be expected to be （）.
