Oregon (OR) Refrigeration Piping Mechanic Class 5B License (CLB) Oregon’s Class 5B license qualifies you for independent refrigeration piping work, a skilled trade commanding $55K–$75K annually depending on specialization and experience. Mastery of pressure vessel code requirements, brazed joint standards, and system commissioning directly correlates with earning potential in HVAC-R contracting and industrial cooling sectors.
| Exam Name | Oregon (OR) Refrigeration Piping Mechanic Class 5B License |
| Exam Code | CLB |
| Format | PDF & Practice Test Engine |
| Target Year | 2026 Updated |
| Features | 100% Verified Q&As |
