EPA Certification Exam 2023 with 100% correct answers

Which Refrigerants contain the most chlorine? CFC's As of what date did it become unlawful to intentionally release Class 1 and Class 2 refrigerants to the atmosphere? July 1, 1992 Which Refrigerants have the lowest zone depletion potential? HFC's The molecule found in CFC's and HCHC's refrigerants that destroys the ozone in the stratosphere is: Chlorine Stratospheric ozone consists of: Three oxygen atoms Stratospheric ozone depletion is a _________ problem: Global The Gas in the stratosphere that protects us from ultraviolet radiation is: Ozone Which refrigerant is a CFC? R-12 Which refrigerant is an HCFC? R-123 & R-22 Which refrigerant is an HFC? R-134a Which refrigerant contains no chlorine? R-134a The Molecule found in the stratosphere that indicates stratospheric ozone depletion is taking place is: Chlorine monoxide The following actions would violate the clean air act (CAA): Knowingly releasing Class 1 Class 2 substances failing to keep or falsifying required records failing to tech the required evacuation levels before opening a systems to the atmosphere for service One time (disposable) refrigerant cylinders are used for: Virgin refrigerant The rule of thumb for refilling approved cylinders is a maximum of _____ percent liquid? 80% The time it takes to properly evacuate and dehydrate a system prior to charging with refrigerant is determined by the: Total volume of the system Amount of non-condensibles (moisture) in the system Ambient Temperature A system that fails to hold a vacuum after the evacuation process: May contain moisture May have a leak To recover refrigerant is to: 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.