Construction Trade Exam Research Area

Plumbing Contractor and Natural Gas

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State of Oklahoma
Construction Industries Board

2401 N.W. 23rd Street, Suite 2F
Oklahoma City, OK 73107
Phone: (405) 521-6550
Toll Free: (877) 484-4424
Oklahoma Construction Industry Licensing Link

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
General Plumbing Knowledge and Regulations 10
Piping, Valves, and Control Valves 8
Fixtures and Equipment 8
Water Supply 10
Drains and Sewers 10
Vents 13
Traps, Interceptors, Indirect, and Special Waste 5
Isometric Analysis 7
Fuel Gas 10
Safety 4

Total number of test questions: 85
Time allowed (minutes): 180
In Oklahoma, you must also pass the Plumbing Business and Law Exam unless you are already a licensed electrical contractor who is adding a classification to your license.

Go to Business and Law Offering

Books Allowed in the Exam

1. International Plumbing Code, 2015, ICC Buy at Amazon
2. International Fuel Gas Code, 2015, ICC Buy at Amazon
3. Mathematics for Plumbers and Pipefitters, 8th Edition, 2012, Lee Smith. Buy at Amazon
4. Code of Federal Regulations - 29 CFR Part 1926 (OSHA), latest amendments - OR - (OSHA) Excerpts latest amendments by PSI. Buy from Publisher

Go to OSHA Resources
Study materials are currently NOT available for this exam

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