EPA 608 passing score: 18 of 25 on every section

The rule in appendix D to subpart F sets the minimum at 70% for each section. Certifying organizations apply it to their own question sets, so the number of right answers you need is the same everywhere: 18 of 25.

That is why Core comes first in every plan. Drill each section on its own page: Core, Type I, Type II and Type III.

Seven sounds like a lot until you notice that one half-learned table can cost four or five of them. Type II questions on evacuation levels all come from the same eight rows, so a technician who mixes up two rows can miss every one of those questions in a single sitting. That is why the plan here starts with the tables, not with reading.

It also explains why a strong total can hide a fail. Someone who scores 24, 23, 22 and 17 has 86 of 100, a number that looks comfortable, and still leaves without Universal because one section is a single question short.

A simple illustration (our arithmetic, not exam data): if you were 90% sure of passing each section on its own, your chance of passing all four in one sitting would be 0.9 × 0.9 × 0.9 × 0.9, about 66%. At 97% sure on each, it rises to about 89%. The way to make Universal safe is to make every section safe, which is what a margin of two or three questions per section does.

Because passed sections stay passed, a miss on one section is not the end: you retake only that section. But it costs a second booking and a second fee, and until Core is passed you hold no certification at all.

If you might ever want Universal, take Type I proctored with the other sections. The higher mark is the price of the open book.

Federal rules set no waiting period between attempts; each certifying organization sets its own policy and fee. Before you rebook, find what cost you the section: for most people it is the numbers (evacuation levels, leak thresholds, recovery percentages) rather than the concepts.

Take a full timed section in practice and aim for 20 or more before you go back. The free EPA 608 practice test scores all four sections against 18 of 25.

With only 7 misses allowed per section, a margin of two questions is the difference between a calm pass and a retake. Two misses usually come from one table you half-remember, so learn the evacuation table and the leak thresholds until you can write them out.

The plan to get there is in how to pass the EPA 608, and the whole certification path is in the EPA 608 certification guide.

Keep your certification card, or know how to get a copy from your certifying organization: wholesalers ask for it before selling refrigerant, and employers ask for it when you start.