单项选择题
A.flushed with clean refrigerant oil B.purged with the refrigerant C.washed with an ammonia and alcohol solution D.grounded to compressor
In the presence of an open flame or hot surfaces, chlor...
单项选择题In the presence of an open flame or hot surfaces, chlorinated fluorocarbon refrigerants decomposes and from （）.
A.petroleum crystals B.phosgene gas C.water vapor D.carbon monoxide
In an operating refrigeration system low on refrigerant...
单项选择题In an operating refrigeration system low on refrigerant, a liquid line sight glass will（）
A.be clear B.be blue C.be light green D.show bubbles
The thermal expansion valve reacts directly to the （）A....
单项选择题The thermal expansion valve reacts directly to the （）
A.temperature in the space being cooled B.liquid refrigerant pressure at the solenoid valve C.pressure drop across the evaporator coils D.refrigerant gas superheat at the coil outlet
