Practice by Category
Untimed practice with immediate feedback after every question. Pick a section to work through at your own pace.
Core
Required for all technicians. Covers ozone depletion, the Clean Air Act Section 608, recovery techniques, and general safety.
90 questions
Type I: Small Appliances
Small appliances such as refrigerators, window AC units, and vending machines with 5 lbs or less of refrigerant.
32 questions
Type II: High-Pressure Appliances
High-pressure appliances like residential and commercial split systems, heat pumps, and packaged units.
40 questions
Type III: Low-Pressure Appliances
Low-pressure appliances, primarily chillers, including evacuation levels and vacuum pump requirements.
32 questions