A warm-air heating, ventilating and air-conditioning contractor fabricates, installs, maintains, services and repairs warm-air heating systems and water heating heat pumps, complete with warm-air appliances; ventilating systems complete with blowers and plenum chambers; air-conditioning systems complete with air-conditioning unit; and the ducts, registers, flues, humidity and thermostatic controls and air filters in connection with any of these systems. This classification shall include warm-air heating, ventilating and air-conditioning systems which utilize solar energy.
Authority cited: Sections 7008 and 7059, Reference: Sections 7058 and 7059 (Business and Professions Code)
Content of the Examination
The Warm-Air Heating, Ventilation and Air-Conditioning Examination is divided into five major sections. These sections are:
1. System Evaluation and Design (15%)
HVAC system design and evaluation
HVAC calculations
Duct system design and layout
2. Fabrication (5%)
Duct system fabrication
Installation preparation
3. System Installation and Start Up (33%)
Electrical components
Plumbing and refrigeration components
Air distribution and duct systems
HVAC system start up
4. Service, Maintenance, and Repair (37%)
HVAC system tests and checks
HVAC system maintenance or repair
5. Safety (10%)
Personal protective equipment
Safety precautions taken at work site
Documentation of hazardous materials
*Percentages are approximate*
Sample Questions
The following questions are typical of the kind of items that are on the examination. The correct answer is highlighted.
1. Where should fire dampers be installed?
In the main risers
In the main exhaust ducts
In the return ducts of the air distribution system
In the branch duct connections that pass through the fire walls
2. What happens when the current in an electric circuit is reduced?
The power increases.
The voltage increases.
The resistance decreases.
The heating effect decreases.
3. Why should a drip leg be installed?
To catch excess gas
To collect moisture
To control input of gas
To control amount of air
*All questions are written and reviewed by licensed contractors who are actively working in the field*
