Refrigerants that contain chlorine but not hydrogen are stable

The per the AHRI standard unsaturated impurities in HFC-134a to be limited to a maximum level of _______:

Prior to scrapping MVAC equipment the refrigerant must be recovered to a minimum vacuum of _______ of mercury

EPA does require a leak to be repaired prior to recharging a motor vehicle air conditioning system

HFC-134a contribute to which of the following:

The internal pressure of a refrigerant cylinder with one ounce of liquid refrigerant is _______ full cylinder:

Any person who sells or distributes any Class I or Class II substance in a container of less than _________ of such refrigerant must verify that the purchaser is Properly Trained and 609 Certified and must retain a record.

Ozone layer extends at Earth’s altitude between _____

Which of the following are the causes of Ozone Layer Depletion:

The empty refillable refrigerant tank must be evacuated to a minimum vacuum of ______ of mercury

______ has developed standards that apply to the recovery and recycling  of motor vehicle refrigerant as well as service guidelines for MVAC technicians.

_______ is the key agent responsible for stratospheric ozone depletion