Construction Trade Exam Research Area

Environmental Air - Class A
(International Code Based)

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Texas Department of Licensing & Regulation
Air Conditioning and Refrigeration Contractors

P.O. Box 12157
Austin, Texas 78711
Telephone: (512) 463-6599
Toll-Free (in Texas): 800-803-9202
TX Dept of Licensing & Regulation

Exam Administrator

PSI Licensure : Certification
3210 E. Tropicana
Las Vegas, NV  89121
(800) 733-9267
PSI Web Site

Exam Type


Exam Content

Subject Areas # of
Air Distribution 18
Basic Refrigeration Components 6
Combustion Air 6
Controls 6
Equipment Requirements 12
HVACR Systems and Design 12
Piping 6
Refrigeration Principles 6
Safety 6
Service 12
Testing 12
Laws and Rules 6
Ventilation 6
Venting 6

Total number of test questions: 120
Time Allowed (Minutes) 230
Part of this exam requires knowledge of business management principles.  We offer those study materials on a separate Texas Mechanical Business and Law web page.

Go to Business and Law Offering

Books Permitted in the Exam

1. International Mechanical Code, 2012, ICC. Buy at Amazon
2. International Fuel Gas Code, 2012, ICC. Buy at Amazon
3. Modern Refrigeration and Air Conditioning, 19th or 20th Edition, 2017, Althous, Turnquist, Bowditch, Bracciano. Buy at Amazon
4. ACCA Ductulator (Duct Slide Rule), ACCA. Buy at Amazon
Study materials are currently NOT available for this exam

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