Sarafand Tech
  1. Home
  2. EPA 608 Mastery Pro
  3. 2026 exam changes kit

The 2026 EPA 608 Exam Changes: 25 Free A2L and A3 Practice Questions

The EPA Section 608 question bank changed in 2026. Here’s what changed, and a free PDF of 25 practice questions on the new A2L and A3 topics, each with the answer explained.

Download the free PDF

PDF, 11 pages, about 500 KB. No email, no sign-up.

What changed in 2026

  • The Section 608 question bank was revised. It now covers A2L refrigerants (mildly flammable, such as R-32, R-454B and R-1234yf) and A3 refrigerants (hydrocarbons such as R-290 propane and R-600a isobutane).
  • The revised exam doesn’t cover the AIM Act.
  • From January 1, 2027, exams from the previous question bank are no longer accepted. Technicians who are already certified don’t retest, and their cards stay valid.

Source: ACHR News, “What You Need to Know About the New Section 608 Exam,” September 19, 2026.

Ask your testing program which version you’ll take.

What’s in the kit

  • 17 questions on A2L refrigerants and 8 on A3 hydrocarbons, marked by exam section (Core, Type I, Type II).
  • An answer key that explains every answer.
  • A one-page table of R-32, R-454B, R-1234yf, R-290 and R-600a.

Instructors: print and share it with your class, unchanged.

Download the free PDF

A sample question

Which leak detection method must never be used on a system charged with an A2L or A3 refrigerant?

  1. AAn electronic detector rated by its maker for A2L refrigerants
  2. BA halide torch, because its open flame can ignite a leak
  3. CA bubble solution brushed or sprayed on the joints
  4. DA standing pressure test using dry nitrogen
Show answerHide answer

B. A halide torch works by drawing refrigerant through an open flame, which can ignite a flammable refrigerant. Bubble solution and a nitrogen standing pressure test create no ignition source, and an electronic detector is acceptable when its manufacturer rates it for A2L or A3 refrigerants.

EPA 608 Mastery Pro app icon

Want more practice?

EPA 608 Mastery Pro has 1,100+ practice questions across Core, Type I, II and III with every answer explained, timed 100-question mock exams, flashcards and P-T charts. Free to download; one purchase unlocks everything, no subscription.

Coming soon to the App Store and Google Play

See the app

EPA 608 Mastery Pro is an independent educational tool. It is not affiliated with, endorsed by, or connected to the United States Environmental Protection Agency, ESCO or any certifying organization. These are practice questions written for study, not questions from the actual exam.