What's newNew: 2026 Section 608 test bank, with A2L questions
Free EPA 608 Practice Test
Practice for the EPA Section 608 technician exam in the same format: 25 multiple-choice questions per section, 18 of 25 to pass each one. Try today's question below with no signup and see the explanation right away.
No signup · 25 questions · an explanation on every answer
EPA 608 question of the day
One question · see why right away
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Which of the following is a common cause of refrigerant leaks?
Correct answer: A. Vibration and wear on aging equipment that cracks joints or rubs through tubing
Leaks usually come from vibration and wear on older equipment, poor brazing or assembly when the system was built, or accidental damage during other work. Cleaning coils, changing filters and labeling cylinders are routine good practice and do not cause leaks.
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Which of the following is least likely to be a common leak location in HVAC systems?
Correct answer: B. HVAC fan
HVAC fans, while essential for system operation, are not typical locations for refrigerant leaks. Common leak locations usually involve areas where refrigerant flows, such as piping connections, coils, and valve connections.
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Which of the following is not a reason why refrigerant leaks are a concern?
Correct answer: A. They can easily be fixed by all homeowners
Refrigerant leaks should indeed be taken seriously due to their potential cost, environmental impact, and effect on HVAC operation. The idea that they can easily be fixed by all homeowners underestimates the complexity and potential hazards involved.
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Do natural events like volcanic eruptions contribute to chlorine in the stratosphere?
Correct answer: B. Yes, chlorine can come from natural sources such as volcanoes, but they are not the primary source
Chlorine is released from natural sources such as volcanoes. But the primary reason for the rise of chlorine in the atmosphere is the refrigerants that have been released.
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Which of the following statements is TRUE about chlorine?
Correct answer: B. A single chlorine atom can survive in the atmosphere for years
The statement "A single chlorine atom can survive in the atmosphere for years before disintegrating." is the only true statement.
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Ozone has __ atoms of oxygen.
Correct answer: B. 3
Ozone is composed of 3 atoms of oxygen.
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How many molecules of ozone can three chlorine atoms destroy?
Correct answer: C. 300,000
In ozone depletion, chlorine acts as individual atoms, not as intact molecules. One chlorine atom can destroy approximately 100,000 molecules of ozone through catalytic reactions. Since the question refers to three chlorine atoms, they can destroy 3 × 100,000 = 300,000 ozone molecules.
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What is the major function of ozone in the stratosphere?
Correct answer: A. Absorb harmful UV rays from the sun
Clue: stratospheric ozone function.
Rule: ozone in the stratosphere absorbs most of the sun's harmful UV rays, which protects people, crops and wildlife.
Why the others are wrong: ozone does not create, redirect or convert UV rays into energy. -
What is the primary source of chlorine in the Stratosphere?
Correct answer: C. Emissions of refrigerant chemicals such as CFCs and HCFCs by humans
The primary source of the rise of chlorine in the atmosphere is the refrigerants that have been released by humans.
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Which element is primarily responsible for stratospheric ozone depletion?
Correct answer: B. Chlorine
Chlorine is the element in many older refrigerants that harms the ozone layer. In the stratosphere, released chlorine atoms break down ozone repeatedly.
Core is required for every certification, whatever type you take.
Take the full Core test (25 questions)Pick an EPA 608 practice test by section
Every technician needs Core plus the type that matches the equipment you work on. Universal certification means all four sections.
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Start here · required for every type
Core practice test
Venting rules, recovery, recycling and reclamation, refrigerant classes and safety.
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Type 1 practice test
Type 1 (Type I) covers small appliances: hermetically sealed at the factory with 5 lb or less of refrigerant, like household refrigerators and window units.
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Type 2 practice test
Type 2 (Type II) covers medium-, high- and very high-pressure appliances: split-system air conditioning and heat pumps on R-410A or R-22, commercial refrigeration.
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Type 3 practice test
Type 3 (Type III) covers low-pressure appliances below 45 psia, mostly centrifugal chillers on R-123.
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Universal practice test
All four sections, 100 questions, each section scored on its own.
Every question checked against
- EPASection 608 test topics
- eCFR40 CFR Part 82, Subpart F
- Federal RegisterSNAP refrigerant rules
- DOT49 CFR cylinder rules
- AHRIStandard 700 · K · M · N
Sources only. Not affiliated with or endorsed by EPA.
Built for the 2026 Section 608 test bank
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Updated for 2026
A2L refrigerants like R-32 and R-454B, the new A2L cylinder markings and the current leak-repair rules. Questions that appear only on the older 2018 exam are labelled.
Updated when federal rules change or learners report a problem. Last update: .
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903 varied questions
All four sections across 28 EPA test topics, with 100+ on-the-job scenarios in multiple-choice, true/false and select-all formats.
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Every question checked
Each question is checked against the federal rules (40 CFR Part 82, Subpart F), EPA's Section 608 test topics or the industry standard it covers. See every source
See how EPA608PracticeTest finds your weak section
Your scores, score history, weak spots and exam-day plan are saved with a free account, on any device.
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See your sections ranked from weakest to strongest, so you know what to practice next.
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Work through the Study Path level by level. Score 8 of 10 on a level's quiz to open the next one.
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Ask why an answer is right, in plain English. Free accounts get 10 questions a month.
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Run a section in 30 minutes, or all 100 questions in 3 hours.
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Set your test date to get a countdown and a daily review target based on the questions you missed.
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Review the numbers and rules you keep missing between practice sessions.
Where the EPA 608 practice questions come from
Every question is checked against the federal rule text, EPA's test topics or the industry standard it covers, and each one records the source it was checked against.
- EPA Section 608 technician certification test topics. For Core: environmental impacts, the Clean Air Act and Montreal Protocol, substitute refrigerants and oils, refrigeration, the three R's, recovery techniques, dehydration and evacuation, safety and shipping. For Type I, II and III: recovery requirements, recovery techniques, leak detection and leak repair requirements.
- 40 CFR Part 82, Subpart F (§82.150 to §82.169) and its Appendix D exam standard, checked against the eCFR text of October 28, 2026.
- EPA SNAP rules on flammable and A2L refrigerants, published in the Federal Register.
- DOT cylinder rules in 49 CFR.
- AHRI Standard 700 and AHRI Guidelines K, M and N, for refrigerant purity, recovery cylinders, service ports and cylinder colors.
- New 2026 questions written from the rule text
- Older questions re-checked line by line in October 2026, 49 retired
- Each question records the source it was checked against
Questions about AIM Act rules are labelled "Not on the 608 exam". Not affiliated with or endorsed by ESCO Institute or EPA.
EPA 608 practice test FAQ
Quick answers about cost, the questions and how scoring works.
Is this EPA 608 practice test free?
Yes. Every section test on this site runs in your browser with no signup. Create a free account to practice from the full bank of 900+ questions and keep your scores, score history and weak spots on any device.
Are these the real EPA 608 exam questions?
No. Certifying organizations keep their exam questions private. These are practice questions in the same format, written for the 2026 Section 608 test bank and checked against the federal rules.
How is the EPA 608 practice test scored?
Each section test has 25 questions and is scored on its own. You pass a section at 18 of 25, the same mark the real exam uses. The Universal test covers all four sections, 100 questions.
Find your weak section before test day.
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