EPA 608 Core Practice Test

| Last Updated: September 4, 2023

I have put together a 50 question EPA 608 core practice test that will test your current knowledge about the subject. All of these questions were created by me and will give you a good idea of the sort of questions you will get on the actual test. If you want more information regarding the EPA 608 certification then you can read my article about here.

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Answer the following questions. There are 50 total. Good luck!


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The study guide will prepare you for the real EPA 608 test and will provide all topics that you need to know to pass.

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#1. Each chlorine atom can destroy up to ____ Ozone molecules

#2. Which of the following refrigerants do NOT contain chlorine

#3. Which of the following is a CFC?

#4. Which of the following is a HCFC?

#5. Which of the following is a HFC?

#6. If you were to arrange the refrigerants in the decreasing order of Ozone Depletion Potential (ODP), it would look like:

#7. What is the effect of depleting ozone in stratosphere?

#8. The evidence of stratospheric ozone depletion ____

#9. CFCs were banned from being produced or imported into the US after:

#10. Recovery equipment must be certified by the EPA if it is manufactured after what date:

#11. As per the clean air act of 1992, Venting of refrigerants is prohibited during:

#12. A person supplying information about a technician intentionally violating the clean air act and venting refrigerants can be awarded up to:

#13. For violating the clean air act of 1992, a technician can be fined up to:

#14. The substitutes for refrigerants are NOT subject to clean air act and are therefore allowed to be vented:

#15. R-12 refrigerant can be substituted in a “drop-in” fashion with which of the following refrigerant?

#16. International treaty designed to protect the ozone layer by phasing out the production of numerous substances that are responsible for ozone depletion is

#17. The compounds controlled by Montreal Protocol include

#18. In a manifold gauge, the high pressure link is colored

#19. Yellow line in a manifold gauge can be connected to

#20. A recovery device which uses the components of the system it is recovering from is called

#21. Which of the following is not a valid way to recover refrigerant from a unit using a system dependent equipment?

#22. It is important to never mix refrigerants because

#23. The color coding of recovery cylinders is

#24. Recovery equipment manufactured after Nov 1993 must be certified by a(n)

#25. Before reselling a reclaimed refrigerant, it must

#26. HFC, like R-134a, works best with which type of lubricant?

#27. The tendency of different components of refrigerant blends like freon and a lubricant leaking at different rates, causing the overall mixture composition to change is called

#28. Refrigerant blends leak at different rates due to

#29. In the refrigeration cycle, high pressure vapor is converted to high pressure liquid in

#30. In the refrigeration cycle cooling occurs when

#31. _____ is when a refrigerant is removed and stored without testing or cleaning.

#32. _____ is when a refrigerant is removed and cleaned for reuse by separating oil and refrigerant

#33. To consider a refrigerant reclaimed, it has to meet

#34. R-22 mixes well with which of the following refrigerant?

#35. The speed of the recovery depends on

#36. How does temperature effect refrigerant recovery process?

#37. For the best recovery, the piping connection to the vacuum pump should be

#38. During system evacuation, it is recommended that the system vacuum gauge should be located:

#39. Which is the most preferred gas to use to check leaks?

#40. Why is it not advised to use oxygen or compressed air to leak check?

#41. When working with non-toxic refrigerants,

#42. The EPA 608 test is primarily focused

#43. Exposure to refrigerants is

#44. To service an area which has a large spill of refrigerants, it is necessary to use

#45. Which of the following is the most important safety precaution when using dry nitrogen from a portable cylinder to pressurize a system?

#46. A refillable cylinder must never exceed ____ of its capacity by weight?

#47. Any cylinder filled with refrigerant and used for transportation must be

#48. Refillable cylinders must be tested and date stamped every __ years.

#49. Before shipping, the cylinder’s labels must contain

#50. Refrigerant cylinders should be stored


EPA 608 Core Practice

The EPA 608 Core Practice Test is a helpful tool for individuals looking to become certified in handling refrigerants safely. We have created this test to prepare you for the Environmental Protection Agency’s (EPA) certification exam, which the law requires for working with refrigeration and air conditioning systems.

In the practice test, you’ll find questions that cover essential topics. By taking this test, you can boost your confidence and ensure that you have the knowledge needed to protect the environment and perform your job safely.

So, if you’re aiming to work in the HVAC industry or any field involving refrigerants, the EPA 608 Core Practice Test is a valuable resource to help you succeed. Test exclusively prepared by HVAC Training 101 team for you.

My name is Bob Wells and I am a retired HVAC tech from Washington state. I am currently retired and no longer do much with HVAC, however, I feel like I have a lot of knowledge in the subject and I wanted to create a website where I could talk about what I've learned and help upcoming HVAC techs. Find more info about me and HVAC Training 101.