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Study Course

Oklahoma Natural Gas Contractor

40 questions 120 minutes 70% to pass 4 topics 3:00 per question Open book
Try 10 free questions Free Cheat Sheet Official Bulletin

Code edition notice: Oklahoma's PSI candidate bulletin (effective August 31, 2026) allows either the 2018 or the 2024 edition of the International Fuel Gas Code (IFGC) on this exam from September 14, 2026 through December 13, 2026. Starting December 14, 2026, only the 2024 editions are permitted.

This practice exam now cites the 2024 edition section numbers. If you are studying from the 2018 book, most section numbers are unchanged; the Chapter 1 administrative sections were renumbered in 2024. If you test on or after December 14, 2026, study from and bring the 2024 books.

Practice at the real exam's pace

Every practice exam shows your time per question against the real exam's clock (3:00 here), and each topic lands in one of these:

Ready Find it faster Study it Needs both Rushing: slow down

What's on the exam

Questions per topic, out of 40
General Fuel Gas Piping -- Knowledge, Definitions, and Regulations10
Pipe Sizing12
Pipe Installation15
Safety3

Topics

Open a topic to read its key concepts

General Fuel Gas Piping -- Knowledge, Definitions, and Regulations

10 on exam · 41 practice questions

This topic includes a study brief covering key concepts and common mistakes — plus a 25-question practice quiz.

Pipe Sizing

12 on exam · 77 practice questions

This topic includes a study brief covering key concepts and common mistakes — plus a 25-question practice quiz.

Pipe Installation

15 on exam · 60 practice questions

This topic includes a study brief covering key concepts and common mistakes — plus a 25-question practice quiz.

Safety

3 on exam · 14 practice questions

This topic includes a study brief covering key concepts and common mistakes — plus a 9-question practice quiz.

Final Practice Exam
40 questions · 120 min · timed simulation of the real exam
Never the same exam twice. Every attempt is drawn fresh from 192 questions, about 4 full exams' worth, and questions you haven't seen come first.
Business and Law exam included
8 topics · 50 questions · 120 min

Required Books

Open-book exam
OSHA Standards for the Construction Industry
Buy on Amazon
2024 Edition
International Fuel Gas Code 2024
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State of Oklahoma, Construction Industries Board, Unofficial Administrative Rules & Courtesy Exam Study Aids Book
Official source
14th Edition
NASCLA Contractors Guide to Business, Law and Project Management – 14th Edition
Buy on Amazon
2018 Edition
2018 International Fuel Gas Code (IFGC)
Buy on Amazon
Oklahoma Mechanical Licensing Act, Oklahoma Statutes, Title 59, Chapter 43A
Official source
Oklahoma Mechanical Industry Regulations, Oklahoma Administrative Code, Title 158, Chapter 50
Official source
Oklahoma Fine Schedule of the Construction Industries Board, Oklahoma Administrative Code, Title 158, Chapter 10
Official source
Oklahoma Lien Law, Oklahoma Statutes, Title 42, Chapter 3
Official source
Oklahoma Workers' Compensation Act Statutory Excerpts, Oklahoma Statutes, Title 85A, Chapter 1
Official source
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