United States · Certification testWhich of these refrigerants is a hydrochlorofluorocarbon (HCFC)?
20 practice questions in the style of the test.
Where else can you find a free EPA 608 practice test?
EPA doesn’t publish a practice test, but it posts the topics each section covers, and every question here comes from that list. Among the approved programs, Mainstream Engineering gives away Type I training software with unlimited practice exams for Windows. For Type II, Type III and Universal, the programs’ practice material is paid or comes as a trial.
The real test is closed-book for Type II, Type III and Universal, so practice without notes.
How our 20 questions are split
Universal is 100 questions, 25 from each section. Ours keep close to that balance.
| Section | Real test | Our 20 |
|---|---|---|
| Core | 25 | 6 |
| Type I, small appliances | 25 | 5 |
| Type II, high-pressure | 25 | 5 |
| Type III, low-pressure | 25 | 4 |
Each section is scored on its own, so a weak Type III score can’t be saved by a strong Core.
Sources: EPA · eCFR and 1 more. Checked October 2026.
- EPA: Section 608 Test Topics ↗
- EPA: Section 608 Technician Certification Requirements ↗
- eCFR: 40 CFR Part 82, Subpart F, Appendix D (certifying program standards) ↗
Rules and fees can change, so check the official site before your test.
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