EPA Certification Exam questions with correct answers

Which Refrigerants contain the most chlorine? ans CFC's As of what date did it become unlawful to intentionally release Class 1 and Class 2 refrigerants to the atmosphere? ans July 1, 1992 Which Refrigerants have the lowest zone depletion potential? ans HFC's The molecule found in CFC's and HCHC's refrigerants that destroys the ozone in the stratosphere is: ans Chlorine Stratospheric ozone consists of: ans Three oxygen atoms Stratospheric ozone depletion is a _________ problem: ans Global The Gas in the stratosphere that protects us from ultraviolet radiation is: ans Ozone Which refrigerant is a CFC? ans R-12 Which refrigerant is an HCFC? ans R-123 & R-22 Which refrigerant is an HFC? ans R-134a