Oklahoma Natural Gas Journeyman

Oklahoma Natural Gas Journeyman Exam: Complete 2026 Study Guide

Passing the Oklahoma natural gas journeyman exam is the gateway to a licensed career in one of the state's steadiest skilled trades. The work is technical, the stakes are real, and the exam reflects that — but with the right preparation, it's entirely within reach. This guide covers everything you need to know: exam format, topic breakdown, sample questions, reference materials, and study strategies that actually work. Whether you're sitting for the first time or coming back after a retest, you'll find practical guidance here.

Exam Overview: Format, Time, and Passing Score

The Oklahoma Natural Gas Journeyman exam is administered by PSI and consists of 30 scored questions. You have 90 minutes to complete it — a generous window that averages three minutes per question. The passing score is 70%, which means you must answer at least 21 of 30 questions correctly.

This is an open-book exam, which is a significant advantage. You may bring approved reference materials into the testing center (more on those below). That said, open book does not mean easy — the questions are specific enough that flipping through pages looking for every answer will eat through your time quickly. You need to know your references well enough to find answers efficiently.

The exam is delivered on a computer at a PSI testing center. Once you've been approved by the Oklahoma Construction Industries Board, you can schedule your exam online or by calling PSI at (855) 834-8750. Check the official exam bulletin for current scheduling details and any updates.

Topics Covered on the Oklahoma Natural Gas Journeyman Exam

The exam draws from four topic areas. Here's how they're weighted — and where your study time should go.

Pipe Installation — 15 Items (50% of the Exam)

This is the dominant category, making up exactly half of all scored questions. Expect questions on indoor and outdoor installation requirements, gas pressure regulators, structural safety, hangers and supports, and direction changes. If you study only one area deeply, make it this one.

General Fuel Gas Piping — Knowledge, Definitions, and Regulations — 8 Items (~27%)

This section covers the foundational rules: testing and inspection procedures, pipe material properties, and the regulatory framework. Understanding maximum operating pressures, test durations, and material requirements is essential here.

Pipe Sizing — 4 Items (~13%)

Fewer questions, but they demand real calculation skills. This area covers maximum gas demand, total connected load, and three sizing methods: longest length, branch length, and hybrid pressure. You'll also need to work with sizing tables for Schedule 40 metallic pipe, CSST (by EHD flow designation), and semirigid copper tubing. Altitude adjustments factor in as well.

Safety — 3 Items (~10%)

Drawn from OSHA standards, these questions cover excavations, ventilation and confined space requirements, PPE, signs and barricades, and fall protection. A small slice of the exam, but OSHA questions are often straightforward if you're familiar with 29 CFR 1926.

Sample Questions

These five questions represent the style and difficulty you'll encounter on the real exam. Work through them — and if you want to check your answers, take our free practice exam to see how you score.

Question 1 — Pipe Installation (Medium)
Which of the following fitting types is NOT permitted for installation in concealed locations on gas piping?
- A) Flared fittings
- B) Brazed fittings
- C) Threaded couplings
- D) Welded fittings

Question 2 — Pipe Installation (Easy)
A pressure regulator installed on the exterior of a building must meet which additional requirement beyond standard listing?
- A) Approved for outdoor installation
- B) Equipped with a bypass valve
- C) Enclosed in a weatherproof cabinet
- D) Rated for temperatures below 0°F

Question 3 — General Fuel Gas Piping (Easy)
What is the maximum operating pressure for natural gas piping systems regulated under the fuel gas code?
- A) 20 psig
- B) 50 psig
- C) 125 psig
- D) 80 psig

Question 4 — Pipe Sizing (Easy)
Above what elevation must the volumetric flow rate of gas be adjusted for altitude when sizing gas piping?
- A) 5,000 feet
- B) 2,000 feet
- C) 1,000 feet
- D) 3,000 feet

Question 5 — General Fuel Gas Piping (Medium)
You have completed installing a fuel gas piping system in a single-family dwelling with a total pipe volume of 6 cubic feet. What is the minimum duration required for the pressure test on this system?
- A) 10 minutes
- B) 30 minutes
- C) 5 minutes
- D) 15 minutes

Know the answers? Our free practice exam will tell you exactly how you're doing — no account required.

What Types of Questions to Expect

Here's a breakdown of the practice question pool we've built for each topic area, along with the kinds of skills each section tests.

General Fuel Gas Piping — Knowledge, Definitions, and Regulations (38 practice questions)
These questions test your grasp of code definitions, material requirements, and inspection procedures. Expect questions about minimum test durations, acceptable test media, maximum operating pressures, and the specific properties of pipe materials like steel, CSST, and copper. Regulatory knowledge — knowing why the code requires what it requires — is just as important as memorizing individual rules.

Pipe Sizing (20 practice questions)
This is where the math lives. Questions require you to calculate maximum gas demand, determine total connected load, and select the correct pipe size from code tables. You'll need to be comfortable with all three sizing methods and know how altitude affects your calculations. Knowing which table to use — and how to read it quickly — is a skill that only comes from practice.

Pipe Installation (67 practice questions)
The largest section by far, and rightly so — it mirrors the exam's 50% weighting. Questions cover a wide range of installation scenarios: what's permitted in concealed locations, how regulators must be installed inside versus outside, support spacing for different pipe materials, structural penetration requirements, and how to handle direction changes. Many questions are scenario-based, asking what's required in a specific situation rather than what a definition says.

Safety (16 practice questions)
Drawn from OSHA 29 CFR 1926, these questions address the field conditions that make gas work dangerous: trenching and excavation safety, working in confined spaces, proper PPE selection, fall protection requirements, and correct use of signs and barricades. Familiarity with the relevant OSHA sections pays off quickly here.

In total, we offer 141 practice questions across all four topic areas.

Required Study Materials

Because this is an open-book exam, your references are also your study materials. You're required to bring them on test day — so you should know them well before you sit down.

International Fuel Gas Code (IFGC)
This is your primary reference. The exam is based on IFGC standards with Oklahoma revisions. You have two edition options:

• 2018 International Fuel Gas Code (IFGC) — Currently permitted, but note that starting December 14, 2026, the 2018 edition will no longer be allowed at the testing center. If you're testing before that date, it's still valid.
• International Fuel Gas Code 2024 — The forward-compatible choice. If you're testing after December 2026, or you want to invest in a reference you can use long-term, get the 2024 edition.

We recommend most candidates pick up the 2024 edition now, both for exam longevity and because it reflects current code practice.

OSHA Standards for Construction
- OSHA 29 CFR 1926 — Required for the safety portion of the exam. This covers the excavation, confined space, fall protection, and PPE questions. Three exam items may not sound like much, but they're reliable points — and this is a reference you'll use throughout your career.

Bring tabbed, highlighted copies of both references. You won't have time to read; you need to find.

Study Tips for the Oklahoma Natural Gas Journeyman Exam

Focus where the exam focuses. Pipe Installation is 50% of your score — 15 questions. General Fuel Gas Piping adds another 27%. Together, those two areas account for roughly 77% of the exam. That's where your deepest preparation should go.

Practice questions beat passive reading. Reading the code cover to cover is useful background, but this is a multiple-choice exam. The format rewards pattern recognition and familiarity with how questions are worded. Working through OK natural gas journeyman license exam questions under realistic conditions builds that skill far more effectively than reading alone.

Train against the clock. You have 90 minutes for 30 questions — that's comfortable, but only if you don't get stuck. Use timed practice sessions to build your pacing. By test day, the format should feel routine.

Pass, don't perfect. Your license won't show your exam score. Whether you ace it or squeak by at 70%, you walk out licensed either way. Aim to pass, not to be perfect — and don't tally your score as you go. That mental pressure only hurts your performance.

Tab and highlight your references before test day. Color-code by topic. Know exactly where the sizing tables are, where regulator requirements live, and where testing and inspection requirements appear.

Start with our free practice exam to get a feel for the format. When you're ready for serious prep, the full practice exam matches the real exam's question count, time limit, and topic breakdown — with detailed score breakdowns by topic so you can see exactly where to focus.

Frequently Asked Questions

How many questions are on the Oklahoma Natural Gas Journeyman exam and how long do I have?
The exam has 30 scored questions and a 90-minute time limit. That works out to an average of three minutes per question — enough time to reference your materials without rushing, as long as you know where to look.

What is the passing score?
You need 70% — that's 21 correct answers out of 30 scored questions.

How much does the exam cost?
The exam fee is $92 per examination portion. This fee is non-refundable and non-transferable, regardless of whether it's your first attempt or a retest.

How do I register?
You must first be approved by the Oklahoma Construction Industries Board. Once approved, you can schedule through the exam registration page or by calling PSI at (855) 834-8750. Visit the state licensing website for application information.

What's the retake policy if I fail?
After a first failure, you must wait 30 days before retesting. After a second or subsequent failure, the waiting period extends to 90 days.

Is the exam open book?
Yes. You may bring the International Fuel Gas Code (2018 or 2024 edition with Oklahoma Revisions) and OSHA 29 CFR 1926 into the testing center. Note that the 2018 IFGC will no longer be permitted starting December 14, 2026.

What ID do I need on exam day?
One valid, non-expired, signature-bearing photo ID — such as a state driver's license, U.S. passport, military ID, or Canadian government-issued ID. The name on your ID must match your registration name exactly.

Can I use a calculator?
Yes. You may bring a silent, non-printing, non-programmable calculator without an alphabetic keyboard or paper tape printing capability.

Does my exam eligibility expire?
No. Once approved by the State, your eligibility does not expire.

Ready to Get Started?

The Oklahoma natural gas journeyman exam is specific, technical, and entirely passable with focused preparation. Know your IFGC and OSHA references, put your heaviest study time into Pipe Installation and General Fuel Gas Piping, and practice under real conditions.

Take our free practice exam now — 10 questions, no account required, no cost. It's the fastest way to find out where you stand. When you're ready to go deeper, the full practice exam gives you 141 questions across all four topic areas, timed and structured exactly like the real thing.

You've put in the field time. Now let's get you licensed.