题目:
Before charging a refrigeration unit, the refrigerant charging lines should be()
A.flushed with clean refrigerant oil
B.purged with the refrigerant
C.washed with an ammonia and alcohol solution
D.grounded to compressor
答案:
参考答案:B
Before charging a refrigeration unit, the refrigerant charging lines should be()
A.flushed with clean refrigerant oil
B.purged with the refrigerant
C.washed with an ammonia and alcohol solution
D.grounded to compressor
参考答案:B