EPA 608 Certification Core Practice Test All Answers Correct

EPA 608 Certification Core Practice Test All Answers Correct 1. As of what date did it become illegal to release Class I and Class II refrigerants into the atmosphere? - ️ July 1, 1992. 2. What role does the ozone layer play in protecting the Earth? - ️ The ozone layer acts as a shield against the Sun's harmful ultraviolet (UV) rays, located in the stratosphere about 6 to 30 miles above the Earth. 3. Which atom in CFC and HCFC refrigerants is responsible for ozone depletion in the stratosphere? - ️ Chlorine. 4. How is an ozone molecule structured? - ️ An ozone molecule consists of three oxygen atoms (O3). 5. Identify a refrigerant that is classified as a CFC. - ️ R-12. 6. What term describes the atoms that target and deplete ozone molecules? - ️ Chlorine and bromine atoms released into the atmosphere. 7. Which refrigerant is categorized as an HFC? - ️ R-134a. 8. Explain how a single chlorine atom can eliminate 100,000 ozone molecules. - ️ A chlorine atom releases one oxygen atom from the ozone, generating two O2 molecules, while the chlorine atom remains intact to continue attacking additional ozone molecules. 9. What refrigerant does not contain chlorine? - ️ R-134a. 10. List examples of refrigerants classified into CFCs, HCFCs, and HFCs. - ️ CFCs: R-11, R-12, R-500; HCFCs: R-22, R-123; HFCs: R-134a. 11. What is the maximum allowable percentage of liquid when refilling approved refrigerant cylinders? - ️ 80%. 12. What does the acronym "HCFC" represent? - ️ Hydrochlorofluorocarbons. 13. Define the term 'recovery' in the context of refrigerants. - ️ Recovery involves extracting refrigerant from a system in any state, storing it in an external container without the need for testing or processing. 14. What is the abbreviation for Ozone Depletion Potential? - ️ ODP. 15. Is R-134a considered a "drop-in" refrigerant? - ️ R-134a is not classified as a drop-in refrigerant. 16. What are some health and environmental effects associated with ozone layer depletion? - ️ Increased global temperatures, heightened risk of skin cancer, and a greater incidence of cataracts. 17. What state is the refrigerant in when it leaves the receiver? - ️ It leaves as a sub-cooled liquid. 18. What evidence indicates that CFCs and HCFCs are harming the ozone layer? - ️ Increased levels of chlorine detected in the stratosphere over the last two decades correlate with rising CFC emissions, alongside samples taken from stratospheric air above volcanoes showing minimal contributions of chlorine compared to CFCs. 19. What component in an air conditioning system transforms low-pressure vapor into high-pressure vapor? - ️ The compressor.