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Additional Trade KIT
C-20 HVAC Heat and Air
 
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Contractors License and Performance Bonds
 

C20 – Warm-Air Heating, Ventilating and Air-Conditioning Contractor

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*


Test Site Policy
This is a closed-book examination. No reference materials may be used during the examination. All materials brought to the examination site must be left in an unmonitored area at your own risk.

Test Strategy
This examination consists of multiple-choice questions each with four choices per question. Some questions require mathematical calculation. Examination questions are written to provide only one BEST answer and are NOT written as trick questions.

All correct answers have equal value. If you are unsure about a particular question it is better to try to answer the question with the chance of possibly getting it correct (and earning one point) than it is to leave the question blank and definitely get it wrong (and lose one point).

Ample time is provided to answer all examination questions so be sure to read each question and its four choices completely and carefully before selecting your answer.

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?

  1. In the main risers
  2. In the main exhaust ducts
  3. In the return ducts of the air distribution system
  4. In the branch duct connections that pass through the fire walls

2. What happens when the current in an electric circuit is reduced?

  1. The power increases.
  2. The voltage increases.
  3. The resistance decreases.
  4. The heating effect decreases.

3. Why should a drip leg be installed?

  1. To catch excess gas
  2. To collect moisture
  3. To control input of gas
  4. To control amount of air

*All questions are written and reviewed by licensed contractors who are actively working in the field*

Resources
Modern Refrigeration and Air Conditioning.
Althouse, A.D., Turnquist, C.H., & Bracciano, A.F.,
Goodheart-Willcox Company,
18604 West Creek Drive,
Tinley Park, IL 60477-6243.
(800) 323-0440
FAX: (888) 409-3900.
INTERNET: www.goodheart-willcox.com

HVAC Duct Construction Standards – Metal and Flexible.
Sheet Metal and Air Conditioning Contractors’ National Association,
4201 Lafayette Center Drive,
Chantilly, VA 20151-1209.
(703) 803-2980
FAX: (703) 803-3732.
INTERNET: www.smacna.org

Heating and Cooling Essentials.
Killinger, J. & Killinger, L.,
Goodheart-Willcox Company,
18604 West Creek Drive,
Tinley Park, IL 60477-6243.
(800) 323-0440
FAX: (888) 409-3900.
INTERNET: www.goodheart-willcox.com

California Building Code.
International Code Council,
5360 Workman Mill Road,
Whittier, CA 90601.
(800) 284-4406
FAX: (562) 692-3853.
INTERNET: www.iccsafe.org

California Electrical Code.
International Code Council,
5360 Workman Mill Road,
Whittier, CA 90601.
(800) 284-4406
FAX: (562) 692-3853.
INTERNET: www.iccsafe.org

California Mechanical Code.
International Code Council,
5360 Workman Mill Road,
Whittier, CA 90601.
(800) 284-4406
FAX: (562) 692-3853.
INTERNET: www.iccsafe.org

California Plumbing Code.
International Code Council,
5360 Workman Mill Road,
Whittier, CA 90601.
(800) 284-4406
FAX: (562) 692-3853.
INTERNET: www.iccsafe.org

Cal/OSHA Construction Safety Orders.
California Code of Regulations, Title 8,
Industrial Relations, Division 1.
Thompson/Barclays Division,
P.O. Box 95767,
Chicago, IL 60694.
(800) 888-3600
FAX: (415) 344-3906.
OR
Building News, Inc.
1612 S. Clementine Street,
Anaheim, CA 92802.
(800) 873-6397
FAX: (714) 533-1467.
INTERNET: ccr.oal.ca.gov or www.bnibooks.com

Residential Duct Systems (Manual D).
Air Conditioning Contractors of America,
Dept. 4028,
Washington, D.C. 20042.
(888) 290-2220
FAX: (301) 604-0158.
INTERNET: www.acca.org

Residential Load Calculation (Manual J).
Air Conditioning Contractors of America,
Dept. 4028,
Washington, D.C. 20042.
(888) 290-2220
FAX: (301) 604-0158.
INTERNET: www.acca.org

Heat Pump Systems: Principles and Applications (Manual H).
Air Conditioning Contractors of America,
Dept. 4028,
Washington, D.C. 20042.
(888) 290-2220
FAX: (301) 604-0158.
INTERNET: www.acca.org

Psychrometrics: Theory and Applications (Manual P).
Air Conditioning Contractors of America,
Dept. 4028,
Washington, D.C. 20042.
(888) 290-2220
FAX: (301) 604-0158.
INTERNET: www.acca.org

Commercial Applications, Systems and Equipment (Manual CS).
Air Conditioning Contractors of America,
Dept. 4028,
Washington, D.C. 20042.
(888) 290-2220
FAX: (301) 604-0158.
INTERNET: www.acca.org

Comfort, Air Quality, and Efficiency by Design (Manual RS).
Air Conditioning Contractors of America,
Dept. 4028,
Washington, D.C. 20042.
(888) 290-2220
FAX: (301) 604-0158.
INTERNET: www.acca.org

Study Guide for EPA Section 608 Test.
Air Conditioning Contractors of America,
Dept. 4028,
Washington, D.C. 20042.
(888) 290-2220
FAX: (301) 604-0158.
INTERNET: www.acca.org

Refrigerant Transition and Recovery Certification Program for HVACR Technicians.
Air Conditioning Contractors of America,
Dept. 4028,
Washington, D.C. 20042.
(888) 290-2220
FAX: (301) 604-0158.
INTERNET: www.acca.org

*Contact information for the above publishers is current as of 7/05*

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