EPA 608 Certification Core Practice Test (with correct answers)

As of what date did it become unlawful to release Class 1 and Class II refrigerants to the atmosphere? correct answers July 1, 1992. What is the ozone layer and why is it important to us on Earth? correct answers 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? correct answers Chlorine. What is an ozone molecule made of? correct answers Three oxygen atoms (O3). Which refrigerant is a CFC? correct answers R-12. What is the name of the atom that attacks ozone molecules? correct answers Chlorine and bromine atoms emitted into the atmosphere. Which refrigerant is a HFC? correct answers R-134a. Describe how one Chlorine atom can destroy 100,000 ozone molecules. correct answers 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? correct answers R-134a. Name the refrigerant types that belong to CFCs, HCFCs and HFCs correct answers 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? correct answers 80%. What do the letters in "HCFC" stand for? correct answers hydrochlorofluorocarbons. To recover refrigerant is to? correct answers 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? correct answers Ozone Depletion Potential. R-134A is a "drop in" refrigerant for? correct answers R-134A is not a drop-in refrigerant.