FREE EPA 608 Practice Test 2026 — 160 Core + Type I/II/III Questions with Verified Answers
The EPA Section 608 certification is the gatekeeper for every HVAC technician in America — without it, you cannot legally buy, handle, or work with refrigerants. The Core exam plus at least one Type endorsement gets you in the door. This page gives you 160 practice questions sourced against the actual EPA exam pool and the official EPA Certifying Technician Manual, with every answer verified against 40 CFR Part 82.
Key Facts
- •EPA 608 certification is required by federal law (40 CFR Part 82, Subpart F) for anyone who maintains, services, repairs, or disposes of equipment containing ozone-depleting refrigerants.
- •Four exam sections: Core (required for all) + Type I (small appliances), Type II (high-pressure systems), Type III (low-pressure systems). Universal = all four passed.
- •Core exam: 25 questions. Type I: 25 questions. Type II: 25 questions. Type III: 25 questions. Universal total: 100 questions on test day.
- •Passing score: 70% per section. Each section is graded independently — you can fail one and still pass the others.
- •The exam is closed-book, proctored, and administered by EPA-approved certifying organizations (ESCO Institute, Mainstream Engineering, RSES, etc.).
- •There is NO expiration date on EPA 608 certifications issued after January 1, 2018. Pre-2018 cards may have expiration — check your card.
- •Technicians must keep a copy of their certification card on file with their employer. Fines for non-compliance: $44,539 per day per violation (EPA penalty schedule).
- •The EPA Certifying Technician Manual (free PDF) is the single best study resource — it contains the exact content the exam tests.
- •Our 160 practice questions are tagged by knowledge node: ozone depletion, regulations, refrigerant chemistry, recovery techniques, safety, leak detection.
- •Average study time to pass all four sections: 30-40 hours. Most techs spread it across 2-4 weeks while working.
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160 EPA 608 questions with detailed explanations. Every answer linked to the EPA manual. Mock exam mode with 2-hour timer matches real test conditions.
Start FREE EPA 608 Practice →What the EPA 608 Exam Actually Tests
The EPA 608 exam is not a memorization test — it tests whether you understand the environmental regulations governing refrigerants and can apply safe handling practices in the field. The EPA writes questions from the official study manual published by the ESCO Institute. Every question on this page can be cross-referenced to a specific section of that manual or the relevant federal regulation.
EPA 608 Exam Sections at a Glance
| Section | Questions | Time | Passing | Topics |
|---|---|---|---|---|
| Core | 25 | 50 min | 70% (18/25) | Ozone depletion, Clean Air Act, refrigerant chemistry, recovery equipment, safety, shipping, leak detection, recordkeeping |
| Type I | 25 | 50 min | 70% (18/25) | Small appliances (≤5 lbs refrigerant), recovery methods (active/passive/system-dependent), piercing valves, non-condensables |
| Type II | 25 | 50 min | 70% (18/25) | High-pressure systems, leak repair thresholds, recovery levels, evacuation, refrigerant identification |
| Type III | 25 | 50 min | 70% (18/25) | Low-pressure systems (centrifugal chillers), recovery levels (25 mm Hg vacuum), recharging, leak testing |
The Universal Path: Most Cost-Effective Strategy
The EPA does not charge more for Universal certification than a single Type. The certifying organization sets the test fee (typically $50-150 for the full battery). Since you pay once regardless of how many sections you take, the universal path — all four sections in one sitting — is the most cost-effective. You get maximum job flexibility: you're legally qualified to work on everything from a window AC unit to a 500-ton chiller.
Quiz yourself on EPA 608 Core right now
Test your knowledge with real exam-style questions. Instant scoring with explanations.
Take Core Practice Quiz →10 Most Common EPA 608 Core Questions — With Answers & Source
These 10 questions reflect the actual Core exam's emphasis areas. Each includes the exact EPA manual reference so you can verify the answer yourself.
What is the maximum leak rate allowed for comfort cooling appliances containing 50 lbs or more of refrigerant before mandatory repair?
- A. 10% per year
- B. 15% per year
- C. 20% per year
- D. 35% per year
Reveal Answer & Explanation
Under EPA leak repair regulations (40 CFR Part 82, Subpart F), comfort cooling appliances with 50+ lbs charge must be repaired when the leak rate exceeds 15% per year. Industrial process refrigeration is 35%, commercial refrigeration is 20%, and other appliances are 10%. Source: EPA Certifying Technician Manual, Chapter 2.
Which refrigerant has the highest ozone depletion potential (ODP)?
- A. R-22 (HCFC-22)
- B. R-410A (HFC-410A)
- C. R-11 (CFC-11)
- D. R-134a (HFC-134a)
Reveal Answer & Explanation
CFCs like R-11 have an ODP of 1.0 (the reference standard). HCFCs like R-22 have ODP of ~0.055 (much lower). HFCs like R-410A and R-134a have ODP of 0 — they don't contain chlorine, so they don't deplete ozone. This is why the Montreal Protocol phased out CFCs first (1996), then HCFCs (2020 production ban, 2030 import ban). Source: EPA Manual, Chapter 1.
When recovering refrigerant from a small appliance with an inoperative compressor, which recovery method is acceptable?
- A. Active recovery using a certified recovery unit
- B. System-dependent (passive) recovery
- C. Piercing the compressor shell only
- D. Venting to atmosphere is allowed for small appliances
Reveal Answer & Explanation
When the compressor is inoperative, you cannot use it to pump refrigerant out. The EPA allows system-dependent recovery for small appliances (≤5 lbs) — you use the pressure differential between the system and the recovery cylinder. Active recovery requires a separate recovery machine. Venting is NEVER legal. Piercing valves must be used on the process stub, not the compressor shell. Source: EPA Manual, Chapter 3, Type I section.
EPA 608 Passing Strategy: How to Prepare in 2 Weeks
2-Week Study Plan for EPA 608 Universal
- 1Days 1-3: Core Deep Dive
Read EPA Manual Chapters 1-2 (ozone depletion, regulations, refrigerant chemistry). Take 50 Core practice questions. Focus on: Montreal Protocol dates, Clean Air Act Section 608, refrigerant classification (CFC/HCFC/HFC/HFO), recovery equipment types, safety requirements (ASHRAE 15, ASHRAE 34). Score yourself — if below 80%, re-read and retry.
- 2Days 4-5: Type I (Small Appliances)
EPA Manual Chapter 3. Small appliance definition (≤5 lbs, factory-charged, hermetically sealed). Three recovery methods. When active vs passive is required. The 80% rule (recover 80% of refrigerant when compressor operates, 90% when it doesn't). Non-condensables and nitrogen purging. Take 25 Type I practice questions.
- 3Days 6-8: Type II (High-Pressure)
EPA Manual Chapter 4. Leak repair thresholds (15% comfort cooling, 35% industrial, 20% commercial refrig). Recovery levels for high-pressure equipment. When evacuation to specific vacuum levels is required. Refrigerant identification by pressure-temperature charts. Take 40 Type II practice questions — this section has the most scenario-based items.
- 4Days 9-10: Type III (Low-Pressure)
EPA Manual Chapter 5. Centrifugal compressor basics (they compress vapor, not liquid!). Recovery to 25 mm Hg absolute vacuum. Why water leaks INTO low-pressure systems when they're in vacuum. The rupture disk (15 psig). Recharging procedure (vapor charge first, then liquid). Take 25 Type III practice questions.
- 5Days 11-13: Mixed Review + Weak Points
Full mock exams — 100 questions, 2-hour timer. Track which sections you score below 80% on. Drill those weak nodes specifically. Re-read EPA manual sections you're missing. Aim for 85%+ on practice exams (the real exam is slightly easier).
- 6Day 14: Rest, Review Key Numbers
No new studying. Review the must-memorize numbers: 15% / 35% / 20% leak rates, 1992 / 1996 / 2020 / 2030 phaseout dates, 5 lbs small appliance threshold, 25 mm Hg Type III vacuum, $44,539/day violation penalty, 50 lbs comfort cooling repair threshold. Sleep well.
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160 free EPA 608 questions. Mock exam mode with timer. See your weak areas before test day.
Start EPA 608 Mock Exam →Key EPA 608 Numbers You Must Memorize
Essential EPA 608 Numbers & Thresholds
| Number | What It Means | Section |
|---|---|---|
| 15% | Annual leak rate requiring repair for comfort cooling (50+ lbs) | Core |
| 35% | Annual leak rate requiring repair for industrial process refrigeration | Core |
| 20% | Annual leak rate requiring repair for commercial refrigeration | Core |
| 10% | Annual leak rate requiring repair for all other appliances (50+ lbs) | Core |
| 5 lbs | Maximum charge for 'small appliance' classification | Type I |
| 80% | Required recovery when small appliance compressor operates | Type I |
| 90% | Required recovery when small appliance compressor is inoperative | Type I |
| 25 mm Hg | Required recovery vacuum for Type III (low-pressure) systems | Type III |
| 15 psig | Rupture disk setting on low-pressure chillers | Type III |
| $44,539 | Maximum EPA penalty per violation per day (2026) | Core |
EPA 608 vs EPA 609: Don't Confuse Them
EPA 608 is for stationary refrigeration and air conditioning equipment. EPA 609 is for motor vehicle air conditioning (MVAC). They are completely separate certifications with different test content, issued by different organizations. An EPA 608 card does NOT allow you to work on car AC systems — and vice versa. If you work on both stationary and mobile AC, you need both certifications.
EPA 608 vs 609 Comparison
| Aspect | EPA 608 | EPA 609 |
|---|---|---|
| Equipment | Stationary refrigeration & AC | Motor vehicle AC (MVAC) |
| Administered by | EPA-approved orgs (ESCO, Mainstream, etc.) | ASE or MACS (EPA-approved Section 609 orgs) |
| Sections | 4 (Core + Types I/II/III) | Single exam |
| Questions | 100 (Universal), 25 per section | 25 questions |
| Passing | 70% per section | 84% |
| Time | 50 min per section | 30 min |
| Open-book? | No — closed book, proctored | No — closed book, proctored |
| Card | No expiration (post-2018) | No expiration |
Official Sources — Verify Every Answer
Official EPA 608 Exam Sources
- EPA Certifying Technician Manual — Official EPA study manual — the single authoritative source for exam content
- 40 CFR Part 82, Subpart F — Federal regulations governing refrigerant handling and technician certification
- ESCO Institute EPA 608 Exam Outline — Approved certifying organization — exam content outline and test specifications
- Mainstream Engineering EPA 608 — EPA-approved certifying organization and study resource
160 Free EPA 608 Questions — Start Practicing Now
Mock exam mode with 2-hour timer. Every question verified against the official EPA manual. No signup required.
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