Hvacr unit 14 - Study guides, Class notes & Summaries
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EPA 608 Core Test Sample Questions & Verified Answers!!
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As of what date did it become unlawful to release Class 1 and Class II 
refrigerants to the atmosphere? 
a. July 1, 1992 
b. July 1, 1993 
c. November 14, 1994 
d. January 1, 1996 - ANSWER a. July 1, 1992 
 
What is the ozone layer and why is it important to us on Earth? 
a. Thin layer of R-22 in the atmosphere that filters UV. 
b. 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 
c. Thin layer of ...
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