EPA 608 Certification Core Practice Test 100% Correct

As of what date did it become unlawful to release Class 1 and Class II refrigerants to the atmosphere? - Answer July 1, 1992. What is the ozone layer and why is it important to us on Earth? - Answer 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? - Answer Chlorine. What is an ozone molecule made of? - Answer Three oxygen atoms (O3). Which refrigerant is a CFC? - Answer R-12. What is the name of the atom that attacks ozone molecules? - Answer Chlorine and bromine atoms emitted into the atmosphere. Which refrigerant is a HFC? - Answer R-134a. Describe how one Chlorine atom can destroy 100,000 ozone molecules. - Answer 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? - Answer R-134a. Name the refrigerant types that belong to CFCs, HCFCs and HFCs - Answer CFC R-11, R-12, R-500, b. HCFC R-22, R-123, HFC R-134a.