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EPA 608 Certification Core Practice Test Questions and Answers [Approved Solutions]
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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.
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