Electrician Practice Tests

The recovery container should be …………….. during a refrigerant recovery?

For recovery of large refrigerant systems which of the following machines should be used?

Recovered refrigerant from a system contains acids, oils and ……………

As per EPA rules all houses of recovery machines should be sealed to reduce the leakage of ………………. When connecting or disconnecting the recovery machine?

What part is most likely to leak in a refrigeration system with open compressor is not used for several months?

What is the R-12 refrigeration unit pressure at room temperature which is idle?

A refrigerant system is dehydrated to …………………..

In which of the following condition the reciprocating compressor should not be energized?

Which of the following is an indicator of possible leak in high pressure refrigeration system?

If large vacuum pump is used for evacuating a refrigeration system………….