Mode 2 · EPA 608 Prep
Practice like it's the real exam.
108 original questions written from the EPA Section 608 regulations — every answer cites the CFR. 25-question sessions, 70% to pass, just like the proctored test.
25 questions
Core
Ozone science, the venting ban, the Three R's, cylinders and safety — everyone takes Core.
Not attempted yetStart
25 questions
Type I
Small appliances: the 5-lb definition, 80/90% recovery, passive recovery technique.
Not attempted yetStart
25 questions
Type II
High-pressure systems: Table 1 evacuation levels, leak-repair triggers, nitrogen practice.
Not attempted yetStart
25 questions
Type III
Low-pressure chillers: 25 mm Hg absolute, purge units, 130°F oil, charging order.
Not attempted yetStart
25 questions
Universal mix
25 questions sampled evenly across Core and all three Types — the full-exam feel.
Not attempted yetStart
Bonus · 2026 rules
Beyond the exam
A2L refrigerants, the AIM Act phasedown and the 2026 HFC rules. Bonus deck — the real exam doesn't test these yet.
Not attempted yetStart