Question

core - question # 19 which of the following is not a violation of the refrigerant management regulations under the clean air act? a failing to recover refrigerant in a system to the required evacuation level. b servicing a system that uses cfcs or hcfcs after the phase - out of those refrigerants. c failing to recover refrigerant in a leaking system to at least 0 psig. d adding nitrogen to a fully charged system, then call the mixture a \leak check gas\ and venting the mixture to the atmosphere.

Explanation:

The Clean Air Act has regulations to control refrigerant emissions and proper handling. Options A, B, and C are violations as they involve improper refrigerant - recovery or working with phased - out refrigerants. Adding nitrogen as a leak - check gas and venting it is a common and non - violating practice as nitrogen is not a regulated refrigerant under the Clean Air Act's refrigerant management regulations.

Answer:

D. Adding nitrogen to a fully charged system, then call the mixture a "leak check gas" and venting the mixture to the atmosphere.