Trade certification · HVAC
EPA Section 608 — Core
The Core section every HVAC technician sits for EPA 608 certification: ozone depletion, the Clean Air Act, refrigerant recovery, safety and shipping.
Questions last checked against the official sources on October 5, 2026.
The real exam at a glance
- Questions
- 25 per section
- Pass mark
- 18 of 25
- Sections
- Core, Type I, Type II, Type III
- Certification
- Does not expire
What you'll practise
Try a question
For comfort cooling appliances with 50 lb or more of ODS refrigerant, above what annual leak rate must leaks be repaired?
- 10%
- 20%
- 30%
- 35%
Show the answer
A. 10% — Commercial refrigeration has a 20% threshold and industrial process refrigeration 30%.
Sample questions by topic (in English)
- Ozone depletion and environment
- Clean Air Act and regulations
- Substitutes and oils
- Safety
- Shipping and cylinders
- Recovery, recycling and reclamation
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Questions about the EPA 608 Core
Is this the official EPA 608 Core?
No. Semplr is independent and not affiliated with the exam body. We write every question ourselves, in the official format and at the official level.
What is the real EPA 608 Core like?
Questions: 25 per section. Pass mark: 18 of 25. Sections: Core, Type I, Type II, Type III. Certification: Does not expire.
How is my practice marked?
Instantly. You see your score against the pass mark, and an explanation for every question — including the ones you got right.
Can I take it on my phone?
Yes. The whole mock exam works on a phone, and your progress is saved in your browser.
Ready for a full run?
One sitting, real timing, then your score against the pass mark.
Start the free mock exam