Which of the following best describes the scope of work for a Class C-20 Warm-Air Heating, Ventilating and Air-Conditioning contractor?
Correct Answer
D) Installation, maintenance, and repair of HVAC systems and related electrical work
Class C-20 contractors can perform comprehensive HVAC work including installation, maintenance, repair, and related electrical connections within their scope.
Why This Is the Correct Answer
Option D is correct because Class C-20 contractors are licensed for the full lifecycle of HVAC systems — installation, maintenance, and repair — and their scope explicitly includes related electrical work such as wiring and connecting HVAC equipment to power sources. This comprehensive scope reflects the integrated nature of modern HVAC systems.
Why the Other Options Are Wrong
Option A: Installation of ductwork only
Option A is incorrect because limiting scope to ductwork only describes a much narrower trade. C-20 contractors are authorized to work on the complete HVAC system, not just the distribution components.
Option B: Installation of heating systems only, excluding air conditioning
Option B is incorrect because C-20 licensees are not restricted to heating systems alone. The classification expressly covers ventilating and air-conditioning as well, making a heating-only restriction directly contrary to the license title.
Option C: Repair of existing HVAC systems only
Option C is incorrect because limiting scope to repair only would exclude new installations and maintenance work. C-20 contractors may both install new systems and service existing ones.
Memory Technique
Think of C-20 as 'Complete HVAC' — the '20' covers all 20 aspects of the system from ductwork to thermostat wiring. If it moves air and heats or cools it, C-20 handles it cradle to grave (install → maintain → repair).
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