Heating, Air Conditioning, and Refrigeration Technology Occupational Skills Award (OSA) The OSA assesses proficiency across refrigerant recovery procedures, EPA regulations, psychrometric principles, and mechanical troubleshooting. Test sections demand hands-on understanding of compressor function, airflow calculations, and electrical safety protocols. Candidates must identify system faults through pressure readings and diagnose component failures? knowledge that separates competent technicians from reactive repair crews in HVAC service industries.
| Exam Name | Heating, Air Conditioning, and Refrigeration Technology Occupational Skills Award |
| Exam Code | OSA |
| Format | PDF & Practice Test Engine |
| Target Year | 2026 Updated |
| Features | 100% Verified Q&As |
