A refrigeration system contaminated wi

1、Sweating of the refrigeration system c

Sweating of the refrigeration system compressor crankcase is caused by （）.Atoo much superheatBinsufficient superheatCsuction pressure too lowDexcessive refrigerant returning to the compressor

2、In a refrigeration system, if the cool

In a refrigeration system, if the cooling water to the condenser fails, the（）.Abox temperature solenoid valve will closeBexpansion valve will closeCcompressor will shutdownDking valve will ope

3、Some refrigeration systems have chemic

Some refrigeration systems have chemical moisture indicators installed in conjunction with the sight glass in the liquid lineIf excess moisture i...

4、In the refrigeration system, a shortag

In the refrigeration system, a shortage of refrigerant is indicated by （）.Athe compressor short cycling on high pressure cut out switchBhigh suction pressureChigh head pressureDbubbles in the sight gla

5、If a refrigeration system were short o

If a refrigeration system were short of refrigerant, the condition would result in （）.Acontinuous running of the compressorBhigh suction pressureChigh discharge pressureDshort cycling of the compressor on the water failure switch

6、Before charging a refrigeration unit,

Before charging a refrigeration unit, the refrigerant charging lines should be（）Aflushed with clean refrigerant oilBpurged with the refrigerantCwashed with an ammonia and alcohol solutionDgrounded to compressor