DC Master Refrigeration and Air Conditioning Mechanic Limited (322) DC’s 322 exam uniquely balances theoretical thermodynamics with hands-on troubleshooting of residential and commercial HVAC systems in real-world climates. Unlike broader certifications, it demands fluency in EPA refrigerant recovery protocols, ductwork diagnostics, and the specific building codes that govern the District’s high-density urban environment—skills rarely bundled together at the journeyman level.
| Exam Name | DC Master Refrigeration and Air Conditioning Mechanic Limited |
| Exam Code | 322 |
| Format | PDF & Practice Test Engine |
| Target Year | 2026 Updated |
| Features | 100% Verified Q&As |
