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The 608, one section at a time
Each guide explains the rule behind the numbers and links to the official EPA page or regulation section it comes from.
How the EPA 608 Exam Is Structured and Scored
The EPA 608 exam from the rule itself: 25 Core questions on every test, 25 per technical type, 100 for Universal, a 70 percent passing score, and closed-book rules.
The 608 Core Section: What You Must Know
The Core section is on every 608 test. The ten topics EPA lists, the venting prohibition, the three Rs, the sales restriction and the records technicians keep.
Type I: Small Appliances and Recovery Requirements
Type I covers small appliances: factory-sealed units with 5 lb or less. Recovery percentages, the 4-inch vacuum option, disposal rules and the mail-in test format.
Type II: High-Pressure Systems and Leak Rules
Type II covers medium-, high- and very high-pressure appliances. Pressure categories, the evacuation table, the 200 lb split, and the leak repair rates and deadlines.
Type III: Low-Pressure Appliances and Chillers
Type III covers low-pressure appliances. The 45 psia definition, the 25 mm Hg absolute evacuation level, pressurizing to 0 psig before opening, and the 85 degree rule.
Universal 608 Certification: Is It Worth It?
What Universal 608 certification covers, how the 100-question test works, which results do not count toward it, and how to decide between Universal and one type.
Recovery, Recycling, Reclaiming: The Differences
The three Rs of the 608, in EPA's own definitions: what recover, recycle and reclaim mean, who can reuse what, and why selling used refrigerant needs a certified reclaimer.
The Refrigerant Transition: HFCs, A2L and What the 608 Covers
What Section 608 says about HFCs and other substitutes, what changed in 2018 and 2020, and where A2L refrigerants appear on official EPA pages. Only what EPA states.
How to Study for the 608 in Two Weeks
A 14-day EPA 608 study plan for phone-sized sessions: Core first, then Type I, II and III, with the numbers to learn by reason and how to test yourself.
Common 608 Mistakes and Trick Questions
Ten traps that cost points on the 608, each with an original example question and the rule that settles it: pressure categories, vacuum units, the three Rs and more.
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Get 20 practice questions with explanations
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.