40 CFR Part 82 · Subpart F
Study once. Pass all four.
Get your Universal card.
A complete self-study course for EPA Section 608 Technician Certification — Core plus Type I, II, and III. Full lessons and timed practice exams in the real format. One payment, no account, a full year of access.
See it before you buy
One real practice question and a lesson excerpt, straight from the course.
Core · Refrigeration cycle
An R-410A system reads 118 psig on the suction gauge. The P‑T chart gives 40°F saturation at that pressure, and the suction line thermometer reads 65°F. What is the superheat, and what does it tell you?
65°F − 40°F = 25°F superheat. Target is 8–20°F, so this is high. High superheat with normal-to-low suction pressure means the evaporator is starved — usually a low charge or a restricted TXV. You always subtract the P‑T saturation temperature from the measured suction-line temperature.
That’s 1 of 100 practice questions, backed by nine lessons that teach the reasoning. Get the course — $9.95
Exam trap
Never pressure-test a system with oxygen or compressed air. Oxygen and refrigerant oil can detonate; compressed air adds moisture on top of the oxygen. Use dry nitrogen with a regulator — one of the most-tested safety points on the exam.
What “Universal” takes
-
Core
Ozone science, the Clean Air Act, recovery and recycling rules, refrigerant handling, safety. Every technician takes it.
-
Type I
Small appliances — factory-sealed systems with 5 lb of refrigerant or less. Household refrigerators, window units, vending machines.
-
Type II
High-pressure systems — split A/C, heat pumps, and supermarket racks running R-22, R-410A, or R-404A.
-
Type III
Low-pressure systems — centrifugal chillers on R-123 or R-514A, serviced under a vacuum.
-
Universal
Core and all three types on one card — the credential you need to buy refrigerant and open a sealed system.
What you get
- Every topic on the exam, across Core and all three types
- Timed practice exams in the real format — 25 questions, 72% to pass
- Progress that remembers where you stopped
- A private link for any phone, tablet, or laptop
- No sign-up, no password, no email — pay and you’re in
$9.95 one payment · one year of access
Secure checkout by Stripe. Instant access.