EPA 608 Type II Study Guide & Practice Test 2026
Type II is the hardest section — highest fail rate on the real exam. Master high-pressure systems, leak rate thresholds (10/20/35%), recovery requirements, and AIM Act updates.
Why Type II Has the Highest Fail Rate
Type II covers high-pressure and very high-pressure appliances. This is where the exam tests leak rate thresholds — the single most-confusing topic. Three thresholds exist: 10% for comfort cooling, 20% for commercial refrigeration, 35% for industrial process. THE TRAP: The exam describes equipment by refrigerant type (R-410A, R-22) instead of by what it does. You determine the threshold by equipment PURPOSE, not refrigerant type.
The exam will describe equipment by refrigerant type to trick you. Always ask yourself: 'What does this equipment DO?' — not 'What refrigerant is inside?'
Free 2 Practice Questions
1. A walk-in cooler with R-410A leaks at 15%. What threshold?
Explanation: Walk-in cooler = commercial refrigeration = 20%. Based on equipment USE, not refrigerant type.
2. What vacuum level for Type II evacuation?
Explanation: Type II = 10 inches Hg. Type III = 15 inches Hg. The exam swaps these numbers.
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