EPA Section 608 Technician Certification
EPA 608 Practice Test
This EPA 608 practice test covers all four parts of the Section 608 technician certification test: Core, Type I (small appliances), Type II (high-pressure) and Type III (low-pressure). Each part is 25 questions, the Universal certification takes all four, and the passing score on the closed-book test is 70 percent. The free 25-question diagnostic needs no account.
The free EPA 608 diagnostic is being prepared and is not open yet. The exam facts and the content outline on this page are current.
Section 608 certification is a federal requirement, but the EPA does not give the test. EPA-approved certifying organizations do, and each one sets its own fee, time limit and retake rules. What is the same everywhere is the structure: a 25-question Core section that everyone takes, plus 25 questions for each equipment type you want to be certified for. One type means 50 questions; Universal means 100.
The Core is the part to learn first. It covers what is common to all refrigerant work: ozone depletion, the Clean Air Act and the Montreal Protocol, the Section 608 regulations, and the difference between recovering, recycling and reclaiming refrigerant. The three Type sections then apply those rules to particular equipment, mostly as recovery requirements, leak detection and leak-repair rules.
The EPA 608 exam at a glance
What you are preparing for, in the exam owner's own numbers.
| Questions | 100For Universal: Core plus Types I, II and III, 25 questions each. A single type is 50 questions: the Core and that type. |
|---|---|
| Delivery | The EPA does not give the test itself. It is administered by EPA-approved certifying organizations, such as ESCO Institute, Mainstream Engineering Corporation, RSES and many trade schools, as a closed-book proctored test in person or, with some programs, remotely online. Type I alone may also be taken in an open-book mail-in format. Each organization sets its own fee. |
| Eligibility | No prerequisites are stated. Certification is required of technicians who maintain, service, repair or dispose of equipment that could release refrigerants; apprentices are exempt while closely and continually supervised by a certified technician. |
| Passing standard | 70 percent on the closed-book Type I, Type II, Type III and Universal tests, each built from 25 Core questions plus 25 questions for each equipment type; 84 percent for the open-book mail-in Type I format. Universal certification covers all equipment types and needs Core plus Type I, II and III, with the Core taken as a proctored closed-book test. |
| Retakes | EPA sets no retake rule; retakes, waiting periods and fees are decided by the certifying organization. Section 608 credentials do not expire. |
| Outline in force | EPA Section 608 Technician Certification Test Topics (web page last updated December 5, 2025) |
Exam facts are taken from EPA’s own published material, last checked October 2, 2026. Source. Confirm fees, dates and rules with the organization you register with before you book.
The four sections. The EPA sets no time limit; your certifying organization does.
| Section | Questions |
|---|---|
| Core | 25 |
| Type I (Small Appliances) | 25 |
| Type II (High-Pressure) | 25 |
| Type III (Low-Pressure) | 25 |
Who takes it
Technicians who maintain, service, repair or dispose of equipment that could release refrigerants. Certification is required for that work; apprentices are exempt while closely and continually supervised by a certified technician. The EPA states no prerequisites for taking the test, and the credential does not expire.
What the EPA 608 exam covers
Each section is 25 questions, so each is a quarter of the Universal test. The topics under each section are the EPA's published test topics; the EPA does not say how many questions come from each.
| Domain | Weight | What it covers |
|---|---|---|
| CORECore10 tasks | 25% |
|
| T1Type I (Small Appliances)3 tasks | 25% |
|
| T2Type II (High- and Very High-Pressure)6 tasks | 25% |
|
| T3Type III (Low-Pressure)7 tasks | 25% |
|
How to use the bank for the EPA 608 exam
- 1
Decide which certification you need
Type I covers small appliances, Type II high- and very high-pressure appliances and Type III low-pressure appliances. Universal covers all three. Practice the Core plus the sections you will sit.
- 2
Take the diagnostic, then start with Core
The 25-question diagnostic samples all four sections. Core comes first because every certification includes it.
- 3
Learn the numbers with their reasons
Much of this test is specific figures: evacuation levels, leak rates, dates. Each explanation here gives the rule the number comes from, which is easier to keep than a list.
- 4
Practice each section as a block of 25
Do timed sets of 25 for each section you are taking, then a full mock of them back to back. Your certifying organization sets the real time limit, so ask it what you will get.
What is in the paid EPA 608 bank
The question bank
The EPA 608 bank is still being written. The live count appears here when questions are published.
Every option explained
A written reason for every option, right and wrong, plus a one-line takeaway, a cited reference and the outline task the question tests.
Tutor mode and timed mode
Tutor mode shows the explanation after each question. Timed mode holds everything back until the end, at exam pace.
A readiness band, by domain
Your first-attempt results weighted the way the exam weights its domains, shown as a band rather than a pass probability: nobody outside the exam owner knows the cut score.
A study plan
Set your exam date and the plan divides the questions you have not seen across the days you have left, weakest domains first, with the mock exams placed in the back half.
EPA 608 passes
A pass is access for a fixed number of days. You pay once; nothing renews.
30-day pass
$15one-off
- The full EPA 608 bank for 30 days
- Every mock exam, tutor and timed modes
- Charged once. It does not renew.
90-day pass
$19one-off
- The full EPA 608 bank for 90 days
- Every mock exam, tutor and timed modes
- Charged once. It does not renew.
Refund within 7 days if you have answered fewer than 50 questions. Pass guarantee: complete 100% of the bank with an average of 80% or better, and if you still do not pass the exam your pass is extended by 90 days at no charge.
How the questions are written and checked
Step 1
Written to the public outline
Each question is written by AI against one task in EPA's published content outline. Nothing is taken from the exam itself.
Step 2
Solved blind by a second model
A different model answers the question without seeing the key. If it does not reach the same answer, the question is not published.
Step 3
Audited for flaws and duplicates
A separate pass looks for item-writing flaws: two defensible answers, a giveaway in the wording, a rationale that contradicts the key. Near-duplicates are removed.
Step 4
Corrected in public
Learners can report any question. Reports and answer statistics flag questions for withdrawal or correction, and every correction is logged.
There is no human subject-matter-expert review in that process, and we do not claim one. What you get instead is a cited reference on every question, so you can check it yourself. Read the full methodology or see the corrections log.
EPA 608 practice questions: common questions
How many questions are on the EPA 608 test?
25 in the Core and 25 for each equipment type. A Type I, II or III certification is 50 questions; Universal, which covers all three types, is 100.
What is the passing score for the EPA 608 test?
70 percent on the closed-book test. Type I can also be taken in an open-book mail-in format, for which the passing score is 84 percent. Your certifying organization will tell you how it applies the score to each section.
How much does the EPA 608 test cost?
The EPA sets no fee. Each certifying organization sets its own, so ask the one you plan to test with.
Can I take the EPA 608 test online?
With some certifying organizations, yes: the test is a closed-book proctored test taken in person or, with some programs, remotely online. Type I alone may also be taken in an open-book mail-in format.
What is Universal certification?
Certification for all equipment types. It needs the Core plus Type I, Type II and Type III, with the Core taken as a proctored closed-book test.
Does EPA 608 certification expire?
No. Section 608 credentials do not expire.
Who gives the EPA 608 test?
EPA-approved certifying organizations, including trade schools. The EPA oversees the program but does not administer the test, and this site does not issue certification either.
Is this EPA 608 practice test free?
The 25-question diagnostic is free, with no account needed. The full bank and mock exams are on a paid pass, charged once with no renewal. The questions are original and are not taken from the EPA test bank.
EPA Section 608 Technician Certification is a federal certification established under the Clean Air Act and overseen by the U.S. Environmental Protection Agency (EPA). This site is an independent study resource; it is not affiliated with, endorsed by, or approved by the EPA or by any EPA-approved certifying organization, and it does not issue Section 608 certification. Practice questions here are original and are not taken from the EPA test bank.