Oil added to refrigeration compressors

Oil added to refrigeration compressors

a) is done when the compressor discharge valve is closed
b) is done with a vacuum on the crankcase
c) is done with the equalizing valve closed
d) is done with the charging line open
e) must be preheated









Answer: B

When charging a refrigeration system it

When charging a refrigeration system it

a) should be done to the condenser
b) should be done with the cooling water shut off
c) should be done to the receiver
d) should be done with the compressor off
e) should be done with the liquid line shutoff valve closed







Answer: E

Charging a refrigeration system

Charging a refrigeration system

a) is done with the expansion valve closed
b) is done by adding refrigerant between the liquid shutoff valve and the expansion valve
c) is done with the compressor shut down
d) is done between the condenser and the receiver
e) is done between the suction valve and the compressor







Answer: B

A sulphur candle is a test for

A sulphur candle is a test for

a) freon leaks
b) ammonia leaks
c) air leaks
d) vacuum seal
e) CFC leaks







Answer: B