EPA 608 EXAM 2026 NEWEST ACTUAL EXAM BANK
COMPLETE 100 QUESTIONS WITH ANSWERS
(100% CORRECT ANSWERS)
1. At high temperatures, CFC and HCFC refrigerants can decompose into
.: phosgene gas
2. A very large refrigerant leak can cause suffocation because refrigerants
.: are heavier than air and displace oxygen
3. For a belt-driven non-hermetic compressor system, the is most likely to
leak if the system has not been operated for several months.: shaft seal
4. indicates low charge in a high-pressure system with a capillary tube.: excessive
superheat
5. Ozone depletion is caused by in HFC refrigerants.: chlorine
6. CFCs and HCFCs making them capable capable of reaching the stratospheric
ozone layer.: do not dissolve in water or easily break down in the atmosphere
7. According to the Rolanda-Molina theory, are destroyed by each chlo- rine
atom in the stratosphere.: 100,000 ozone molecules
8. The stratospheric ozone layer protects us from .: ultraviolet radiation from the sun
9. Which health effect increases from loss of the stratospheric ozone layer?: cases of cataracts or skin cancer
10. What proves that HCFCs are in the stratosphere?: HCFCs found in air samples from the stratosphere.
1
, 11. What makes HFC refrigerants damaging to the environment?: They can have very high global warming
potentials.
12. makes HFO refrigerants less flammable than HC refrigerants.: Flourine
13. Which refrigerant contains chlorine?: R-12
14. HFO refrigerants are miscible in lubricants.: POE lubricants
15. An example of HcFC refrigerant is: : R-123
16. What is being done in the U.S. to stop damage to the stratospheric ozone layer?: Eliminating the
use of CFCs and HCFCs refrigerants
17. EPA regulations require appliances to have .: a service aperture or process hub
18. The release of any CFC, HCFC, or HFC refrigerant during is illegal.: -
theft of equipment
19. is the only EPA SNAP approved "drop in" replacement for R-22.: There are
no direct drop-in refrigerant substitutes
20. Ester-based oils like POE can be mixed with .: no other oils
21. What provides the cooling in a vapor compression refrigeration system?: The vaporization of the liquid
refrigerant
22. An oil sample might be taken when .: a. moisture and/or acid problems are suspected
b. oil sludge formation or oil waxing is suspected
c. residual acidic oil from a burn-out is suspected of contaminating the replacement oil
23. returns refrigerant to new product specifications and requires chem- ical analysis to
2
COMPLETE 100 QUESTIONS WITH ANSWERS
(100% CORRECT ANSWERS)
1. At high temperatures, CFC and HCFC refrigerants can decompose into
.: phosgene gas
2. A very large refrigerant leak can cause suffocation because refrigerants
.: are heavier than air and displace oxygen
3. For a belt-driven non-hermetic compressor system, the is most likely to
leak if the system has not been operated for several months.: shaft seal
4. indicates low charge in a high-pressure system with a capillary tube.: excessive
superheat
5. Ozone depletion is caused by in HFC refrigerants.: chlorine
6. CFCs and HCFCs making them capable capable of reaching the stratospheric
ozone layer.: do not dissolve in water or easily break down in the atmosphere
7. According to the Rolanda-Molina theory, are destroyed by each chlo- rine
atom in the stratosphere.: 100,000 ozone molecules
8. The stratospheric ozone layer protects us from .: ultraviolet radiation from the sun
9. Which health effect increases from loss of the stratospheric ozone layer?: cases of cataracts or skin cancer
10. What proves that HCFCs are in the stratosphere?: HCFCs found in air samples from the stratosphere.
1
, 11. What makes HFC refrigerants damaging to the environment?: They can have very high global warming
potentials.
12. makes HFO refrigerants less flammable than HC refrigerants.: Flourine
13. Which refrigerant contains chlorine?: R-12
14. HFO refrigerants are miscible in lubricants.: POE lubricants
15. An example of HcFC refrigerant is: : R-123
16. What is being done in the U.S. to stop damage to the stratospheric ozone layer?: Eliminating the
use of CFCs and HCFCs refrigerants
17. EPA regulations require appliances to have .: a service aperture or process hub
18. The release of any CFC, HCFC, or HFC refrigerant during is illegal.: -
theft of equipment
19. is the only EPA SNAP approved "drop in" replacement for R-22.: There are
no direct drop-in refrigerant substitutes
20. Ester-based oils like POE can be mixed with .: no other oils
21. What provides the cooling in a vapor compression refrigeration system?: The vaporization of the liquid
refrigerant
22. An oil sample might be taken when .: a. moisture and/or acid problems are suspected
b. oil sludge formation or oil waxing is suspected
c. residual acidic oil from a burn-out is suspected of contaminating the replacement oil
23. returns refrigerant to new product specifications and requires chem- ical analysis to
2
