EPA 608 Practice Test Type 3

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This EPA 608 Type 3 practice test centers on low-pressure systems and the specific procedures involved in servicing them. It consists of 40 questions covering essential knowledge of recovery levels, allowable leak detection methods, low-pressure system recharging, and EPA regulations. Use this test to build on your knowledge and feel confident that you will be prepared for Type 3 certification.

40 Questions

1. Which of the following must be documented in leak repair records?

 
 
 
 

2. What is a major danger of using oxygen or compressed air during leak testing?

 
 
 
 

3. What is the EPA-required vacuum level when recovering refrigerant from a low-pressure appliance for disposal?

 
 
 
 

4. Low-pressure refrigerants operate with what kind of pressure during normal system operation?

 
 
 
 

5. What method can speed up the recovery process from a low-pressure appliance?

 
 
 
 

6. During recovery from a low-pressure chiller, what is the typical temperature of the water used to aid refrigerant removal?

 
 
 
 

7. Why should oil be warmed before evacuation in low-pressure systems?

 
 
 
 

8. What must be done if the annual leak rate exceeds the EPA threshold?

 
 
 
 

9. Which component helps prevent system damage during refrigerant recovery by releasing pressure if it becomes excessive?

 
 
 
 

10. When using a pressurizing agent to leak test an idle low-pressure appliance, which gas is acceptable?

 
 
 
 

11. Which leak detection method is most commonly used for low-pressure centrifugal chillers?

 
 
 
 

12. What is the required vacuum level for recovering refrigerant from a low-pressure appliance with a recovery device made after November 15, 1993?

 
 
 
 

13. What is the EPA leak rate threshold for comfort cooling appliances containing more than 50 pounds of refrigerant?

 
 
 
 

14. According to EPA regulations, what is the required evacuation level for low-pressure appliances using equipment manufactured after November 15, 1993?

 
 
 
 

15. Which of the following is true about the boiling point of low-pressure refrigerants?

 
 
 
 

16. When must follow-up leak inspections be conducted after a repair on a system containing over 50 pounds of refrigerant?

 
 
 
 

17. What type of records must be maintained for leak inspections and repairs?

 
 
 
 

18. What is the purpose of hydrostatic tube testing in low-pressure systems?

 
 
 
 

19. When removing refrigerant from a low-pressure system, what part of the system is evacuated last?

 
 
 
 

20. What does the EPA require before opening a low-pressure system for maintenance?

 
 
 
 

21. Before disposing of a low-pressure appliance, what must a certified technician do?

 
 
 
 

22. What is the EPA-required evacuation level for low-pressure appliances using recovery or recycling equipment manufactured after November 15, 1993?

 
 
 
 

23. Why must technicians be cautious when recovering liquid refrigerant from a chiller under low ambient conditions?

 
 
 
 

24. What is the EPA leak repair threshold for comfort cooling low-pressure appliances?

 
 
 
 

25. How long do technicians have to repair a leak after it is discovered in a commercial low-pressure system?

 
 
 
 

26. What is the primary reason for pulling a deep vacuum on a low-pressure system?

 
 
 
 

27. When must a technician perform a follow-up verification test after a successful leak repair?

 
 
 
 

28. Why are low-pressure systems more likely to leak air into the system?

 
 
 
 

29. What is the primary challenge when recovering refrigerant from low-pressure appliances?

 
 
 
 

30. For industrial process refrigeration (IPR) systems, what is the maximum allowable annual leak rate before repairs are mandatory?

 
 
 
 

31. If a system exceeds the EPA leak rate threshold, how many days does a technician have to complete the repair?

 
 
 
 

32. Which of the following is a potential safety hazard when heating a low-pressure system to speed recovery?

 
 
 
 

33. Why is it important to isolate a low-pressure system from the vacuum pump after evacuation?

 
 
 
 

34. What helps reduce recovery time when evacuating refrigerant from a low-pressure appliance?

 
 
 
 

35. What happens if a low-pressure system contains water and the vacuum is pulled too quickly?

 
 
 
 

36. Which of the following is a common refrigerant used in low-pressure appliances?

 
 
 
 

37. Which system is most likely to use a low-pressure refrigerant?

 
 
 
 

38. What is the typical method used to speed up refrigerant recovery from a low-pressure system?

 
 
 
 

39. What should a technician do if system pressure rises after evacuation during chiller disposal?

 
 
 
 

40. What EPA regulation applies when a leak is detected in a low-pressure system with more than 50 pounds of refrigerant?

 
 
 
 


This Type 3 practice test emphasizes low-pressure systems, including key service practices, recovery procedures, and EPA-mandated guidelines. All 40 questions are required, so take your time to complete them thoroughly. Use this practice test to help you feel more confident before your actual certification exam.

Mark A. Fletcher
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