EPA 608 Certification Core Practice Test Questions And Answers

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.