Free EPA 608 Universal Practice Test

By BRIX Editorial Team · Updated October 24, 2026

EPA 608 Universal certification means you've passed Core plus Types I, II and III, which covers every kind of stationary refrigeration and AC equipment. Under EPA's rules the Universal test is 100 questions, 25 from each section, closed-book and proctored, with a 70% passing score. You can take it in one sitting or combine separately passed type tests.

Key takeaways

Universal = Core + Type I + Type II + Type III. It's 100 questions.
You can take it all at once or combine passing scores on separate Type I, II and III tests.
A mail-in Type I or an open-book Core test can't be used toward Universal.
Our exam mode draws 25 questions from each section, out of 125 original questions, and scores each section separately.

Free practice test

EPA 608 Universal practice questions

125 original questions. Study mode shows the answer and explanation after each question. Exam mode gives you 100 random questions and scores you at the end. No sign-up; progress saves in this browser.

Sample questions

1. A technician opens a valve and lets the R-410A charge from a split system escape to the air so the job goes faster. What does federal law say about that?
- A. It's allowed because R-410A doesn't deplete ozone
- B. It's prohibited: knowingly venting non-exempt substitute refrigerants during service is banned
- C. It's allowed if less than 5 pounds escapes
- D. It's only prohibited during disposal, not service
Show answer and explanation
Answer: B. It's prohibited: knowingly venting non-exempt substitute refrigerants during service is banned
The venting prohibition in 40 CFR 82.154(a) covers ozone-depleting refrigerants and non-exempt substitutes like R-410A, during maintenance, service, repair and disposal. Having no chlorine doesn't make an HFC exempt. Only a short list of substances, such as nitrogen, carbon dioxide and water, is exempt.
Source: 40 CFR 82.154(a) https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-82/subpart-F/section-82.154
2. Under the Section 608 rules, what makes an appliance a "small appliance"?
- A. It's any residential appliance, regardless of charge size
- B. It's fully manufactured, charged and hermetically sealed in a factory with 5 pounds or less of refrigerant
- C. It holds less than 15 pounds of refrigerant, however it was charged
- D. It weighs under 100 pounds and plugs into a standard outlet
Show answer and explanation
Answer: B. It's fully manufactured, charged and hermetically sealed in a factory with 5 pounds or less of refrigerant
The definition in 40 CFR 82.152 has two parts: the unit must be fully manufactured, charged and hermetically sealed at the factory, and it must contain 5 pounds or less of refrigerant. A system charged in the field doesn't qualify, even if its charge is small.
Source: 40 CFR 82.152 https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-82/subpart-F/section-82.152
3. Which signs point to a leak in a high-pressure system?
- A. A higher-than-normal head pressure only
- B. A quieter-than-normal compressor
- C. Excessive superheat, and traces of oil around fittings on hermetic systems
- D. Low superheat and a frosted suction line
Show answer and explanation
Answer: C. Excessive superheat, and traces of oil around fittings on hermetic systems
EPA's Type II topics list excessive superheat and traces of oil (for hermetic systems) as signs of leakage. A short charge starves the evaporator, so the vapor leaving it picks up extra superheat, and escaping refrigerant carries oil with it.
Source: EPA, Section 608 Technician Certification Test Topics https://www.epa.gov/section608/section-608-technician-certification-test-topics
4. What makes an appliance "low-pressure" under the Section 608 definitions?
- A. It uses a refrigerant with a liquid-phase saturation pressure below 45 psia at 104 °F
- B. It runs below 100 psig on the high side
- C. It has a centrifugal compressor
- D. It holds less than 50 pounds of refrigerant
Show answer and explanation
Answer: A. It uses a refrigerant with a liquid-phase saturation pressure below 45 psia at 104 °F
40 CFR 82.152 defines a low-pressure appliance by its refrigerant: a saturation pressure below 45 psia at 104 °F. The regulation's examples are R-11, R-123, R-113 and R-245fa.
Source: 40 CFR 82.152 https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-82/subpart-F/section-82.152
5. Which element, released when CFCs and HCFCs break down in the stratosphere, destroys ozone?
- A. Fluorine
- B. Carbon
- C. Chlorine
- D. Hydrogen
Show answer and explanation
Answer: C. Chlorine
Strong ultraviolet light in the stratosphere breaks CFC and HCFC molecules apart and frees chlorine atoms. Those chlorine atoms attack ozone. That's why chlorine content is the key to a refrigerant's ozone-depletion potential.
Source: EPA, Basic Ozone Layer Science https://www.epa.gov/ozone-layer-protection/basic-ozone-layer-science
6. A homeowner's ductless mini-split was charged with 3 pounds of R-410A by the installer at the house. Is it a small appliance?
- A. No, because R-410A systems are never small appliances
- B. Yes, because its charge is under 5 pounds
- C. No, because it wasn't charged and hermetically sealed in a factory
- D. Yes, because it's residential equipment
Show answer and explanation
Answer: C. No, because it wasn't charged and hermetically sealed in a factory
Charge size alone isn't enough. A small appliance must be fully manufactured, charged and hermetically sealed in a factory. A split system charged on site is a high-pressure appliance, so working on its refrigerant circuit takes Type II (or Universal) certification.
Source: 40 CFR 82.152 https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-82/subpart-F/section-82.152
7. When should you leak test a high-pressure system?
- A. Before charging or recharging it
- B. Only once a year
- C. Only after it's been recharged
- D. Only if the customer asks
Show answer and explanation
Answer: A. Before charging or recharging it
EPA's Type II topics state the need to leak test before charging or recharging equipment. Charging a system that still leaks just puts more refrigerant into the air.
Source: EPA, Section 608 Technician Certification Test Topics https://www.epa.gov/section608/section-608-technician-certification-test-topics
8. Which refrigerant does the regulation list as an example of a low-pressure refrigerant?
- A. R-410A
- B. R-245fa
- C. R-22
- D. R-134a
Show answer and explanation
Answer: B. R-245fa
The low-pressure examples in 82.152 are R-11, R-123, R-113 and R-245fa. R-134a is a medium-pressure example, and R-22 and R-410A are high-pressure examples.
Source: 40 CFR 82.152 https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-82/subpart-F/section-82.152

117 more questions load when you start a round.

How does the Universal test work?

Appendix D of the regulation spells it out: "Tests for Universal technicians will include 100 questions (25 from Group 1 and 25 from each relevant technical Group)," and Universal tests "may be taken all at once, or by combining passing scores on separate Type I, Type II, and Type III tests" (40 CFR 82, Subpart F, Appendix D). The whole thing must be closed-book and proctored in a secure environment. That's why a mail-in Type I result can't count, and why EPA says an open-book Core test can't be used for Universal either (EPA).

The regulation sets 70 percent as the passing score for the Universal test. How a certifying organization reports a one-sitting Universal attempt when you pass some sections and miss others is up to its own procedures, so ask before you book. Our results page shows your score for each section so you can see where you'd stand either way.

What a Universal attempt looks like
Section	Questions on the real test	In this practice bank	What it covers
Core	25	36	Ozone, Clean Air Act, three Rs, recovery equipment, safety, shipping
Type I	25	28	Small appliances: 80/90% recovery, passive recovery, disposal
Type II	25	33	High- and medium-pressure: evacuation table, leak repair, leak detection
Type III	25	28	Low-pressure chillers: purge units, 25 mm Hg, recharging
Total	100	125	Pass at 70% (closed-book, proctored)

Real-test counts from 40 CFR 82 Subpart F, Appendix D, verified 2026-10-24. Bank counts update as we add questions.

Who should go straight for Universal?

Universal is the only certification that lets you work on everything from a dorm fridge to a 1,000-ton chiller. It makes sense if:

You're in an HVAC program and don't yet know whether you'll end up residential, commercial or refrigeration.
Your employer services a mix of equipment, such as rooftop units, walk-ins and the occasional chiller.
You plan to start your own shop and don't want to turn down a job because your card says Type II.
You'd rather study once and sit once than book a second test later.

If you're certain you'll only ever work on one class of equipment, a single type plus Core is a smaller lift. The EPA 608 certification guide compares the options.

How Universal practice is different from the single sections

The single-section pages let you go deep on one topic list. Universal practice tests stamina and switching. In 100 questions you'll jump from ozone chemistry to a refrigerator with a dead compressor to a chiller's purge unit, and similar-sounding numbers start to blur: 0, 4, 10 and 15 inches of vacuum for Type II; 25 mm Hg absolute for Type III; 4 inches for small appliances. The questions most people miss on Universal practice are the ones where a number from one section is the wrong answer to another.

A study plan for Universal

1
Take one full 100-question round cold
Use exam mode. Don't look anything up. Your results page splits the score into Core, Type I, Type II and Type III topics.
2
Fix the weakest section first
Go to that section's own page and use study mode, reading every explanation. Most people find Type II's tables and Type III's chiller procedures take the longest.
3
Build one sheet of numbers
Write every number from all four sections on one page, grouped by section: dates, percentages, pressures, pounds and days. Re-draw it from memory every day.
4
Run full rounds again
Each round draws a fresh random 25 from each section. Aim to clear 70% in every section, not just overall, three rounds in a row.
5
Book a proctored test
Pick a program from EPA's list of certifying programs, which shows who offers on-site and remote testing.

More EPA 608 practice

All EPA 608 practice testsWhich section to take, plus a 20-question diagnostic Core practice test36 questions: ozone, the Clean Air Act, the three Rs, safety Type I practice test28 questions: small appliances and passive recovery Type II practice test33 questions: high-pressure systems, leak repair, evacuation levels Type III practice test28 questions: low-pressure chillers EPA 608 certification guideWho needs it, how to test, lost cards, A2L refrigerants

Frequently asked questions

How many questions are on the EPA 608 Universal exam?

The Universal test is 100 questions: 25 from Core and 25 each from Type I, Type II and Type III, under Appendix D of 40 CFR Part 82, Subpart F. It can be taken in one sitting or built by combining separate passing tests.

What score do you need to pass EPA 608 Universal?

The regulation sets a 70 percent passing score for the closed-book Universal test. Ask your certifying organization how it scores and reports each section when you take all four in one sitting.

Can I get Universal by passing the types separately?

Yes. EPA's regulation says Universal can be earned by combining passing scores on separate Type I, Type II and Type III tests, as long as they're closed-book and proctored. A mail-in Type I test and an open-book Core test don't count toward Universal.

Is Universal harder than Type II?

It covers more, not harder material. You need everything in Type II plus small appliances and low-pressure chillers, and you have to keep the similar-looking numbers from each section straight across 100 questions.

Does a Universal card ever expire?

No. EPA states that Section 608 technician certification credentials do not expire. If you lose the card, contact the certifying organization that tested you; EPA doesn't issue or replace cards.

Sources

eCFR — 40 CFR Part 82, Subpart F, Appendix D (test standards) (checked October 24, 2026)
EPA — Section 608 Technician Certification Requirements (checked October 24, 2026)
EPA — Section 608 Technician Certification Test Topics (checked October 24, 2026)
eCFR — 40 CFR 82.156 Proper evacuation of refrigerant (Table 1) (checked October 24, 2026)
eCFR — 40 CFR 82.161 Technician certification (checked October 24, 2026)
EPA — Certification Programs for Section 608 Technicians (updated 2026-10-20) (checked October 24, 2026)