EPA Certification Exam |100 Questions and Answers(A+ Solution guide)

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 monoxideThe 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