100 questions11 topics
Core
Venting rule, the sales restriction, recover, recycle and reclaim, certification, ozone and refrigerant families, oils, safety, cylinders and shipping.
RefrigerantReady 608 Practice Bank
Every 608 answer, with its reason.
300 original practice questions for Core, Type I, Type II and Type III. Pick an answer and you see why it is right, why the other three are wrong, and the section of the rule it comes from.
Not on sale yet. People on the list hear first when it opens.
What you get
- Questions
- 300
- Core
- 100
- Type I
- 70
- Type II
- 70
- Type III
- 60
- Practice exams
- 25 + 25, or 100
- Price
- $24 once
What's inside
Four sections, written from the rule itself.
Every question was written from 40 CFR Part 82, Subpart F and EPA's Section 608 pages, and links to the page it relies on. Where a rule changed over time, the question says "under current EPA rules". Source checked in October 2026.
70 questions5 topics
Type I
What counts as a small appliance, the 80 and 90 percent recovery levels, passive recovery, the 4-inch vacuum option, mail-in testing and disposal.
70 questions7 topics
Type II
Pressure classes, the evacuation table, major and non-major repairs, recovery techniques, leak signs and the leak repair rules for 50-pound systems.
60 questions8 topics
Type III
Low-pressure chillers: 25 mm Hg absolute, pressurizing to 0 psig, the 85 degree rule for nitrogen, oil at 130 degrees F, charging and leak repair.
How it works
Answer, read the reason, keep the streak.
Pick an answer
Four options, one right. Practice one section at a time or mix all four.
Read the reason
Why the right answer is right, why each of the other three is wrong, and the rule in plain words with a link to the official page.
Take a practice exam
25 Core plus 25 for Type I, II or III, or Universal with 100. Optional timer. A score for each section next to the 70% reference line.
Fix the weak spots
Points, a daily goal, streaks, levels for each section, badges, and a Review list of every question you missed.
The 70% line comes from Appendix D to Subpart F, which sets the passing score for closed-book tests. It is a reference only: your certifying organization sets the rules for your test.
Preview
Two questions from the bank, with the full explanation.
This is how every answer looks in the app after you pick an option.
CoreSales and records
A homeowner pays a certified technician, who charges R-410A from the technician's own cylinder into the homeowner's heat pump. Has the sales restriction been broken?
ANo. Refrigerant charged into an appliance by a certified technician during service is an allowed saleRight
BYes, unless the homeowner is also certified
CYes, the homeowner bought refrigerant without a card
DOnly if the charge is under 5 pounds
Why A is right
One of the allowed cases is refrigerant charged into an appliance by a certified technician or an apprentice during maintenance, service or repair.
Why the others are wrong
- BThe homeowner does not need certification in this case.
- CThe rule lists refrigerant charged by a certified technician or apprentice during service as allowed.
- DCharge size is not part of this exception.
What the rule says (paraphrased)
The sales rule allows refrigerant that a certified technician or apprentice charges into an appliance while servicing it.
40 CFR 82.154(c)(1)(viii) / 40 CFR 82.154 Prohibitions
Type IIIEvacuation and opening
The refrigerant in a low-pressure appliance boils above 85 degrees F at 29.9 inches of mercury. How may you raise its internal pressure for a non-major repair?
AVent some refrigerant to equalize
BUse heat as much as possible first, then nitrogen may be used from that level up to atmospheric pressureRight
CUse heat until it reaches 5 psig
DUse nitrogen only, no heat
Why B is right
For refrigerants with boiling points above 85 degrees F, persons must use heat to raise the internal pressure as much as possible, but may use nitrogen to raise it from the level reached with heat to atmospheric pressure.
Why the others are wrong
- AVenting is prohibited.
- CThe target is atmospheric pressure, 0 psig, not 5 psig.
- DThe rule requires using heat as much as possible first.
What the rule says (paraphrased)
The rule says to raise pressure with heat as far as possible, then nitrogen may finish the job up to atmospheric pressure, for refrigerants boiling above 85 degrees F.
40 CFR 82.156(a)(1)(ii) / 40 CFR 82.156 Proper evacuation of refrigerant
Coming soon
RefrigerantReady 608 Practice Bank
$24 one time, planned price
Join the launch list30-day refund, no questions asked. Personal license for one person. See the terms and the privacy policy.
- 300 original questions with three-part explanations.
- Practice exams in the official format, with a score for each section.
- A rule reference and an official link on every answer.
- Works on your phone, offline too. Progress stays on your device.
Frequently asked questions
Are these real EPA exam questions?
No. Every question was written from scratch for RefrigerantReady, from the official rule text and EPA's Section 608 pages. The real test bank is released only to EPA-approved certifying organizations, so expect different wording on test day.
What does the Practice Bank cover?
300 questions: 100 Core, 70 Type I, 70 Type II and 60 Type III. You can practice by section or mixed, and take practice exams of 25 Core plus 25 for one type, or Universal with 25 from each section.
Where do the answers come from?
From 40 CFR Part 82, Subpart F on ecfr.gov and EPA's Section 608 pages on epa.gov, checked in October 2026. Every answer names the section of the rule or the EPA page and links to it, so you can read the source yourself.
What does the 70% line mean?
Appendix D to Subpart F sets 70 percent as the passing score for closed-book tests. The app shows it as a reference line next to your score in each section. Your certifying organization sets the rules for your test, so check with them.
Is there a time limit?
Only if you want one. The optional timer gives 1 minute per question, which is a pacing choice of ours, not an official limit. Ask your certifying organization how long your test lasts.
Does it work on my phone and offline?
Yes. It is a web app made for phones. After the first visit it keeps working without a signal, and your progress stays on your device. You can export a backup and import it on another device.
What if a rule changes or I find a mistake?
Every question has a Report an error button. Reports come to us with the question ID and your note, and we recheck the question against the official page.
How does the refund work?
If the Practice Bank is not useful to you, ask within 30 days of purchase and you get a full refund, no questions asked. See the terms for details.
Can you promise I will pass?
No. Nobody can honestly promise that. The Practice Bank gives you structured practice with the reason behind every answer, so you can see which section needs more work.
Is RefrigerantReady connected to EPA?
No. RefrigerantReady is an independent study resource. Not affiliated with, endorsed by, or approved by the U.S. Environmental Protection Agency or any EPA-approved certifying organization. EPA does not review or approve training or preparatory programs.
Not affiliated. RefrigerantReady is an independent study resource. Not affiliated with, endorsed by, or approved by the U.S. Environmental Protection Agency or any EPA-approved certifying organization. EPA does not review or approve training or preparatory programs. The questions are original practice material, not questions from any real exam. Rules change: confirm with the official pages and your certifying organization.
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Join the launch list
Twenty original questions across Core, Type I, Type II and Type III. Each one comes with the answer, the reason, and the section of the rule it comes from. Plus the launch price when the Practice Bank opens.