Free EPA 608 Type II Exam Prep

The Clean Air Act and Section 608, ozone depletion and global warming potential, the Montreal Protocol and AIM Act, the three R's (recover, recycle, reclaim), the venting prohibition, sales restrictions, and technician certification

Recovering medium-, high- and very-high-pressure refrigerant, the Table 1 evacuation levels (high-pressure: 0 in Hg under 200 lb, 10 in Hg at 200 lb or more with post-November 15, 1993 equipment; medium-pressure: 10 in Hg under 200 lb, 15 in Hg at 200 lb or more; 4 in Hg with older equipment; very-high-pressure 0 in Hg), system-dependent vs self-contained recovery, push-pull, and recovery-equipment certification (AHRI 740)

Annual leak-rate thresholds (comfort cooling 10%, commercial refrigeration 20%, industrial process 30%) for appliances with 50 lb or more of ozone-depleting refrigerant (Part 82) and, since January 1, 2026, 15 lb or more of HFC refrigerant (Part 84), repair deadlines and verification tests, chronic leaks, and leak-detection methods (electronic, UV dye, nitrogen pressure test, halide torch)

High-pressure refrigerants (R-22, R-410A, R-407C, A2L blends), charging blends as liquid to avoid fractionation, POE oil and moisture control, retrofits, deep-vacuum dehydration, filter-driers, and accurate charging by weight/superheat/subcooling

The 80% recovery-cylinder fill rule, DOT cylinder color coding and disposal, frostbite and oxygen-displacement hazards, refrigerant decomposition, ASHRAE 15 machinery-room safety, and three-year recordkeeping