EPA Core Practice Test, Type I, and Type II Questions & Answers 2023

As of what date did it become unlawful to release Class 1 and Class II refrigerants to the atmosphere? - July 1, 1992 What is the ozone layer and why is it important to us on Earth? - Protective shield for Earth from the sun's harmful ultraviolet. The atom found in CFC and HCFC refrigerants that destroys ozone in the atmosphere is? - Chlorine What is an ozone molecule made of? - Three oxygen atoms (O3) Which refrigerant is a CFC? - R-12 What is the name of the atom that attacks ozone molecules? - Chlorine and bromine atoms emitted into the atmosphere What refrigerant is an HFC? - R-134A Describe how one chlorine atom can destroy 100,000 ozone molecules - Chlorine releases one of the oxygen atoms and forms two O2 oxygen molecules, leaving the chlorine molecule free to attack another ozone molecule and repeat the process. Which refrigerant contains no chlorine? - R-134A Name the refrigerant types that belong to CFCs, HCFCs and HFCs - CFC R-11, R12, R-500, HCFC R-22, R-123, HFC R-134a The rule of thumb for refilling approved cylinders is a maximum of _____ percent liquid? - 80% What do the letters in "HCFC" stand for? - Hydrochlorofluorocarbons To recover refrigerant is to? - Remove a refrigerant in any condition from a system in either an active or passive manner, and store it in an external container without necessarily testing or processing.