A2L Refrigerant Safety Practice Test
Reviewed by Craig Migliaccio, NJ Master HVACR Contractor & Founder, AC Service Tech ·
Free questions on the EPA rules and safety practices behind A2L certification, including Technology Transitions dates, SNAP labels and handling, and leak repair.
Adaptive Practice Test
15–20 Questions Drawn From 155
Every attempt is a new test: questions are drawn at random and the answer order is shuffled. Score 80% or more and your next test moves up a level; score under 50% and it eases back. Your level is saved only in this browser.
Your Level Foundation
A2L Refrigerant Safety Full Mock Exam
How This Practice Test Works
- Each attempt draws 15–20 questions at random from our pool of 155 and shuffles the answer order. Score 80% or more and the next test moves up a difficulty level; under 50% and it eases back.
- After every answer you see an explanation and the EPA reference behind it.
- We use 70% as a practice target. The ESCO A2L exam needs 70% (35 of 50). Aim for 80% or better here.
- There is no sign-up. Your level is saved only in this browser.
These are original questions written by our editorial team from the published EPA. They are not real exam questions. Questions follow EPA and eCFR text, not the actual exam.
What the Question Pool Covers
Every question cites the rule behind its answer. Counting those references shows where the pool puts its weight:
| Reference | Questions |
|---|---|
| 40 CFR Part 82 | 53 |
| EPA Refrigerant Safety | 10 |
| 40 CFR §84.64(b) | 7 |
| 40 CFR §84.52 | 6 |
| 40 CFR §84.106(d) | 5 |
| 40 CFR §84.106(a) | 4 |
| 40 CFR §84.106(g) | 4 |
| 40 CFR §84.54(c)(1) | 3 |
| 40 CFR §84.54(c)(2) | 3 |
| 40 CFR §84.54(e) | 3 |
| 40 CFR §84.106(c) | 3 |
| 40 CFR §84.54(a)(13) | 2 |
| 40 CFR §84.54(c)(9) | 2 |
| 40 CFR §84.58(a)(2) | 2 |
| 40 CFR §84.58(d) | 2 |
| 40 CFR §84.58(e) | 2 |
| 40 CFR §84.106(e) | 2 |
| 40 CFR §84.108(f) | 2 |
| 40 CFR §84.54(a)(1) | 1 |
| 40 CFR §84.54(a)(2) | 1 |
| 40 CFR §84.54(a)(3) | 1 |
| 40 CFR §84.54(a)(4) | 1 |
| 40 CFR §84.54(a)(10) | 1 |
| 40 CFR §84.54(a)(11) | 1 |
| 40 CFR §84.54(b) | 1 |
| 40 CFR §84.54(c) | 1 |
| 40 CFR §84.54(c)(11) | 1 |
| 40 CFR §84.54(c)(12) | 1 |
| 40 CFR §84.54(c)(13) | 1 |
| 40 CFR §84.54(d) | 1 |
| 40 CFR §84.54(g) | 1 |
| 40 CFR §84.54(i) | 1 |
| 40 CFR §84.54(j) | 1 |
| 40 CFR §84.50 | 1 |
| 40 CFR §84.56(a) | 1 |
| 40 CFR §84.56(c) | 1 |
| 40 CFR §84.56(d) | 1 |
| 40 CFR §84.56(b) | 1 |
| 40 CFR §84.58(a) | 1 |
| 40 CFR §84.58(b) | 1 |
| 40 CFR §84.58(g) | 1 |
| 40 CFR §84.60(a) | 1 |
| 40 CFR §84.64(a) | 1 |
| 40 CFR §84.106(f) | 1 |
| 40 CFR §84.106(b) | 1 |
| 40 CFR §84.108(a) | 1 |
| 40 CFR §84.108(b) | 1 |
| 40 CFR §84.108(g) | 1 |
| 40 CFR §84.108(i) | 1 |
| 40 CFR §84.104(a) | 1 |
| 40 CFR §84.112(a) | 1 |
| 40 CFR §84.116(a) | 1 |
| 40 CFR §84.116(e) | 1 |
| 40 CFR §84.116(g) | 1 |
| 40 CFR §84.110(a) | 1 |
| 40 CFR §84.114(a) | 1 |
| 40 CFR §84.110(d) | 1 |
| 40 CFR §84.54(a)(6) | 1 |
Sample Questions With Worked Answers
A few questions from the pool with the answer and explanation, so you can see the style before you start.
Under the Technology Transitions rule, new residential and light commercial AC and heat pump systems may not be installed with a refrigerant whose GWP is:
Answer: 700 or greater. Source text: “residential or light commercial air-conditioning or heat pump systems using a regulated substance, or a blend containing a regulated substance, with a global warming potential of 700 or greater, except for variable refrigerant flow…”
Reference: 40 CFR §84.54(c)(1)
The 700-GWP installation limit for residential and light commercial AC and heat pump systems (other than VRF) took effect on:
Answer: January 1, 2025. Source text: “( 1 ) Effective January 1, 2025, residential or light commercial air-conditioning or heat pump systems…”
Reference: 40 CFR §84.54(c)(1)
A new split system using a GWP-700+ refrigerant may still be installed after the 2025 date if:
Answer: All specified components were manufactured or imported before January 1, 2025. Source text: “may continue to be installed where all specified components of that system are manufactured or imported prior to January 1, 2025…”
Reference: 40 CFR §84.54(c)(1)
For residential and light commercial variable refrigerant flow (VRF) systems, the 700-GWP installation restriction takes effect on:
Answer: January 1, 2026. Source text: “( 2 ) Effective January 1, 2026, variable refrigerant flow systems for use as residential or light commercial air-conditioning or heat pumps…”
Reference: 40 CFR §84.54(c)(2)
A new VRF system with a GWP-700+ refrigerant whose specified components were all made before January 1, 2026 may be installed until:
Answer: January 1, 2027. Source text: “may be installed prior to January 1, 2027, where all specified components of that system are manufactured or imported prior to January 1, 2026…”
Reference: 40 CFR §84.54(c)(2)
How Difficulty Is Spread Across the Pool
Each question is tagged Foundation, Intermediate or Advanced, and each new test favors questions close to your current level that you have not seen yet in this browser. This is how the 155 A2L Refrigerant Safety questions divide:
| Level | Questions | Share of Pool |
|---|---|---|
| Foundation | 15 | 10% |
| Intermediate | 75 | 48% |
| Advanced | 65 | 42% |
Because unseen questions come first, repeated attempts work through the pool rather than repeating the same items. Note the reference on every miss and reread that section before your next attempt.
Study Before You Test
- A2L Refrigerant Certification Guide: ESCO Low GWP Exam, EPA 40 CFR 84 Rules and UL 60335-2-40
- A2L Refrigerant Safety Full Mock Exam
- EPA 608 Practice Tests and Study Guides