Environmental Science > QUESTIONS & ANSWERS > EPA 608 Certification Core Practice Test. Top Exam Questions and answers, rated A (All)

EPA 608 Certification Core Practice Test. Top Exam Questions and answers, rated A

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EPA 608 Certification Core Practice Test. Top Exam Questions and answers, rated A 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. Describe how one Chlorine atom can destroy 100,000 ozone molecules. - ✔✔-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. [Show More]

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