EPA 608 Exam Study Tips: Section-by-Section Prep

Core Section

This is the conceptual foundation for the entire exam. Focus on understanding, not just memorizing, the difference between recovery, recycling, and reclamation, and why the venting prohibition exists (ozone depletion and climate impact). Build clear definitions for related terms like ODP and GWP, since questions often test whether you understand what these measures represent, not just that they exist.

Type I & Type II Systems

For Type I, focus on the distinction between recovering refrigerant from an appliance with an operating compressor versus a non-operating one, since the required approach differs. For Type II, focus on high-pressure system safety considerations and the general recovery process for common residential and commercial air conditioning equipment. Practicing scenario-based questions ("this appliance has X refrigerant charge and a non-functioning compressor — what's required?") builds more transferable understanding than memorizing isolated facts.

Type III & Recovery Equipment

Low-pressure chiller content is often the least intuitive section for technicians whose field experience leans toward residential systems, so give it dedicated review time. Understand why these systems can operate below atmospheric pressure and what that means for air and moisture infiltration risk — that conceptual understanding makes the vacuum-level and recovery-equipment questions much easier to reason through.

General Exam Strategy

• If pursuing Universal certification, study all four sections (Core plus three Types) in a balanced rotation rather than over-focusing on the equipment type you're most familiar with from field experience.
• For scenario questions, identify the equipment type described first, since the correct recovery approach depends heavily on that classification.
• Review any missed practice questions by section so you know exactly where to concentrate your remaining study time before test day.