- C-1 Acoustical and Insulation
- C-13 Electrical
- C-15 Electronic Systems Contractor
- C-15a Fire and Burglar Alarm Contractor
- C-15b Telecommunications Contractor
- C-16 Elevator Contractor
- C-16a Conveyor Systems Contractor
- C-2 Mechanical Insulation
- C-20 Fire Protection Contractor
- C-20a Dry Chemical Fire Repressant Systems Contractor
- C-21 Flooring Contractor
- C-22 Glazing Contractor
- C-23 Gunite Contractor
- C-27b Trimming and Removal Contractor
- C-3 Asphalt Paving
- C-31 Masonry Contractor
- C-31a Cement Concrete Contractor
- C-31b Stone Masonry Contractor
- C-32 Ornamental, Guardrail and Fencing Contractor
- C-35 Pile Driving, Pile and Caisson Drilling, and Foundation
- C-37b Irrigation and Lawn Sprinkler Systems
- C-41 Reinforcing Steel Contractor
- C-43 Sewer, Sewage Disposal, Drain and Pipe Laying
- C-43a Reconditioning and Repairing Pipelines
- C-5 Cabinet, Millwork and Carpentry Remodeling and Repairs
- C-51 Tile Contractor
- C-52 Ventilating and Air Conditioning Contractor
- C-55 Waterproofing Contractor
- C-56 Welding Contractor
- C-57 Well Contractor
- C-6 Carpentry Framing
- C-60 Solar Power Systems Contractor
- C-62 Pole and Line Contractor
- C-7 Carpet Laying
- C-9 Cesspool
- JP Journeyman Plumbing Exam
- JWE Journey Worker Electrician
- JWIE Journey Worker Industrial Electrician
- JWSE Journey Worker Specialty Electrician
- MEE Maintenance Electrician Exam
- MP Master Plumbing Exam
- SE Supervising Electrican Exam
- SIE Supervising Industrial Electrician Exam
- SSE Supervising Specialty Electrician Exam