15. The rule of thumb for refilling approved cylinders is a maximum of
percent liquid?
ANS 80%
16. The time it takes to properly evacuate and dehydrate a system prior to charging
with refrigerant is determined by the
ANS Total volume of the system Amount of non-condensibles (moisture) in the system
Ambient Temperature
17. A system that fails to hold a vacuum after the evacuation process
ANS May contain moisture
May have a leak
18. To recover refrigerant is to
ANS Remove refrigerant is any condition from a system in either an active or passive manner,
and store it in an external container without necessarily testing or processing.
19. The process that reduces contaminate in used refrigerant by oil separation with single
and multiple passes through devices such as replaceable filter core driers, which reduces
moisture, acidity, and particulate matter is
ANS Recy- cling
3/
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