EPA 608 CERTIFICATION COMPLETE EXAM - QUESTIONS WITH VERIFIED ANSWERS - UPDATED EDITION (2026/2027)

EPA 608 CERTIFICATION COMPLETE EXAM - QUESTIONS WITH
VERIFIED ANSWERS - UPDATED EDITION (2026/2027)




1. What does EPA stand for?

• A) Environmental Protection Agency ANSWER
• B) Energy Production Authority
• C) Environmental Preservation Act
• D) Energy Policy Administration

2. Which section of the Clean Air Act established the national recycling and
emission reduction program?

• A) Section 606
• B) Section 608 ANSWER
• C) Section 609
• D) Section 610

3. What is the maximum penalty for knowingly venting refrigerant?

• A) $10,000 per day
• B) $27,500 per day
• C) $37,500 per day
• D) $51,570 per day ANSWER

4. Which of the following refrigerants is a CFC?

• A) R-410A
• B) R-134a
• C) R-12 ANSWER
• D) R-404A

5. What does ODP stand for?

• A) Ozone Distribution Pattern
• B) Ozone Depletion Potential ANSWER
• C) Oxygen Distribution Percentage
• D) Outdoor Design Parameter

,6. Which refrigerant has the highest ODP?

• A) R-22
• B) R-11 ANSWER
• C) R-134a
• D) R-410A

7. What is GWP?

• A) Gas Weight Potential
• B) Global Warming Potential ANSWER
• C) Greenhouse Weight Parameter
• D) Gas Warming Parameter

8. HFCs have what characteristic?

• A) High ODP, High GWP
• B) High ODP, Zero GWP
• C) Zero ODP, High GWP ANSWER
• D) Zero ODP, Zero GWP

9. What refrigerant replaced R-12 in most applications?

• A) R-22
• B) R-134a ANSWER
• C) R-410A
• D) R-404A

10. Which type of refrigerant contains chlorine?

• A) HFCs
• B) CFCs ANSWER
• C) HFOs
• D) None of the above

Refrigerant Safety & Handling

11. What color are cylinders containing R-410A?

• A) White
• B) Green
• C) Rose/Pink ANSWER
• D) Yellow

,12. Disposable cylinders are only used for what type of refrigerant?

• A) Virgin refrigerant ANSWER
• B) Recovered refrigerant
• C) Reclaimed refrigerant
• D) All of the above

13. What should never be done to a disposable refrigerant cylinder?

• A) Refill it ANSWER
• B) Store it upright
• C) Use it for charging
• D) Label it

14. What happens if air is mixed with refrigerant in a system?

• A) Decreases system efficiency
• B) Increases discharge pressure
• C) Causes non-condensables
• D) All of the above ANSWER

15. Nitrogen is used for what purpose?

• A) Charging systems
• B) Leak testing and purging ANSWER
• C) Recovery operations
• D) All of the above

16. What is the pressure rating for recovery cylinders?

• A) 250 psig
• B) 350 psig
• C) 400 psig ANSWER
• D) 500 psig

17. How full can a recovery cylinder be filled with liquid refrigerant?

• A) 60%
• B) 70%
• C) 80% ANSWER
• D) 90%

18. What does DOT stand for?

, • A) Department of Transportation ANSWER
• B) Department of Trade
• C) Division of Technology
• D) Division of Transportation

19. Refrigerant cylinders must be hydrostatically tested every:

• A) 3 years
• B) 5 years ANSWER
• C) 7 years
• D) 10 years

20. What piece of equipment is used to transfer liquid refrigerant?

• A) Vacuum pump
• B) Recovery machine
• C) Both A and B
• D) Neither A nor B ANSWER

Refrigerant Recovery

21. What does "recover" mean?

• A) Remove refrigerant and store it in an external container ANSWER
• B) Remove, clean, and return refrigerant to the same system
• C) Process refrigerant to new product specifications
• D) Vent refrigerant to the atmosphere

22. What does "recycle" mean?

• A) Remove refrigerant and store it
• B) Clean refrigerant for reuse by oil separation and single or multiple
passes through filter-driers ANSWER
• C) Process refrigerant to new product specifications
• D) Mix different refrigerants together

23. What does "reclaim" mean?

• A) Remove refrigerant from a system
• B) Clean refrigerant for reuse
• C) Process refrigerant to AHRI 700 standards ANSWER
• D) Destroy refrigerant