EPA 608 Certification Study Guide - Core Test Sample Questions with correct answers

As of what date did it become unlawful to release Class 1 and Class II refrigerants to the atmosphere? Correct Answer - July 1, 1992 What is the ozone layer and why is it important to us on Earth? Correct Answer - Protective shield for Earth from the sun's harmful ultraviolet (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 Answer - Chlorine What is an ozone molecule made of? Correct Answer - Three oxygen atoms (O3). What type of refrigerant is R-12? Correct Answer - CFC What is the name of the atom that attacks ozone molecules? Correct Answer - Chlorine and bromine atoms emitted into the atmosphere What type of refrigerant is R-134a? Correct Answer - HFC Describe how one Chlorine atom can destroy 100,000 ozone molecules. Correct 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. Does R-134a contain Chlorine? Correct Answer - No it is a CFC