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Temperature/pressure chart is used for which of the following?
Identify the refrigerant
When you recover refrigerant from small appliances with inoperative compressors, the recovering unit must be connected to _______.
both the high and low side of the system
Which of the following techniques is effective when recovering refrigerant into a non-pressurized container from a refrigerator with an inoperative compressor? Select all that apply.
heating and striking the compressor sharply several times
using a vacuum pump
All appliances must have a service aperture valve for which of the following?
Both for recovering and charging refrigerant
Non-condensables in a refrigeration system results in ______.
High discharge pressure
After the recovery is complete, it is important to remove solderless piercing valves because _____.
they tend to leak over time
Which of the following refrigerants can be mixed in recovery cylinder?
Refrigerants should not be mixed