EPA 608 Universal Verified Answers
1. Refrigeration technicians who violate the Clean Air Act can:
- Lose their EPA certification, be fined, be required to appear in Federal court.
2. After 1995, any supplies of CFC refrigerants to service existing units in the USA can only come from:
- Recovery and recycling.
3. Refrigerant that is recovered can be returned to:
- The same system or other systems owned by the same person without restriction.
4. Refrigerant cannot be called "reclaimed" unless it:
- Has been chemically analyzed and meets the ARI-700 standard.
5. The EPA can require a technician to demonstrate their ability to perform proper procedures for
recovering and/or recycling refrigerant. Failure to demonstrate competency can result in:
- Revocation of the technician's certification.
6. What characteristic(s) of CFCs make them more likely to reach the stratosphere than most other
compounds containing chlorine?
- CFCs that contain chlorine but not hydrogen are stable and do not break down in the lower
atmosphere after being released, allowing chlorine or bromine to react with ozone, turning it back to
oxygen and thus destroying the ozone layer.
7. A system is considered dehydrated when:
- The vacuum indicator shows you have reached and held the required finished vacuum.
8. Disposable refrigerant containers are used for:
- Virgin refrigerant.
9. Which refrigerant is an HCFC?
, - R-123, R-124, R-22.
10. What statement is true about an azeotropic refrigerant mixture?
- It is a mixture that acts like a single-component refrigerant over its entire range.
11. Chlorofluorocarbons (CFCs) and hydrochlorofluorocarbons (HCFCs) have which of the following in
common?
- Both are compounds that can degrade the ozone layer.
12. To scrap a disposable cylinder, the internal cylinder pressure should be reduced to at least:
- 0 psig.
13. Manifold gauge sets are often color-coded; when this is done, the high-pressure gauge is color-
coded:
- Red.
14. In general, blended refrigerants should be charged:
- As a liquid.
15. Blended refrigerants leak from a system:
- In uneven amounts due to different vapor pressures.
16. Which of the following gases help form the earth's protective shield?
- Stratospheric ozone.
17. In a refrigerant system, the device that changes a low-pressure vapor to a high-pressure vapor is the:
- Compressor.
18. Data shows that chlorine in the stratosphere comes mainly from CFCs rather than from natural
sources such as volcanoes because:
1. Refrigeration technicians who violate the Clean Air Act can:
- Lose their EPA certification, be fined, be required to appear in Federal court.
2. After 1995, any supplies of CFC refrigerants to service existing units in the USA can only come from:
- Recovery and recycling.
3. Refrigerant that is recovered can be returned to:
- The same system or other systems owned by the same person without restriction.
4. Refrigerant cannot be called "reclaimed" unless it:
- Has been chemically analyzed and meets the ARI-700 standard.
5. The EPA can require a technician to demonstrate their ability to perform proper procedures for
recovering and/or recycling refrigerant. Failure to demonstrate competency can result in:
- Revocation of the technician's certification.
6. What characteristic(s) of CFCs make them more likely to reach the stratosphere than most other
compounds containing chlorine?
- CFCs that contain chlorine but not hydrogen are stable and do not break down in the lower
atmosphere after being released, allowing chlorine or bromine to react with ozone, turning it back to
oxygen and thus destroying the ozone layer.
7. A system is considered dehydrated when:
- The vacuum indicator shows you have reached and held the required finished vacuum.
8. Disposable refrigerant containers are used for:
- Virgin refrigerant.
9. Which refrigerant is an HCFC?
, - R-123, R-124, R-22.
10. What statement is true about an azeotropic refrigerant mixture?
- It is a mixture that acts like a single-component refrigerant over its entire range.
11. Chlorofluorocarbons (CFCs) and hydrochlorofluorocarbons (HCFCs) have which of the following in
common?
- Both are compounds that can degrade the ozone layer.
12. To scrap a disposable cylinder, the internal cylinder pressure should be reduced to at least:
- 0 psig.
13. Manifold gauge sets are often color-coded; when this is done, the high-pressure gauge is color-
coded:
- Red.
14. In general, blended refrigerants should be charged:
- As a liquid.
15. Blended refrigerants leak from a system:
- In uneven amounts due to different vapor pressures.
16. Which of the following gases help form the earth's protective shield?
- Stratospheric ozone.
17. In a refrigerant system, the device that changes a low-pressure vapor to a high-pressure vapor is the:
- Compressor.
18. Data shows that chlorine in the stratosphere comes mainly from CFCs rather than from natural
sources such as volcanoes because:
