EPA 608 Certification Core Practice Test exam 2023 with 100% correct answers

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 ultraviolent (UV) rays in the stratosphere layer that extends about 6 to 30 miles above earth. The atom found in CFC and HCFC refrigerants that destroys ozone in the stratosphere 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. Which refrigerant is a 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, R-12, R-500, b. 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 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. What is ODP? Ozone Depletion Potential. R-134A is a "drop in" refrigerant for? R-134A is not a drop-in refrigerant.