Oklahoma Plumbing and Natural Gas Journeyman - Online Exam Prep Course

Prepare for the Oklahoma Plumbing Journeyman and Natural Gas examination with an online exam prep course focused on plumbing systems, sanitary drainage, water supply, venting, fixtures, piping materials, natural gas systems, gas-pipe sizing, isometric drawings, plumbing mathematics, and jobsite safety. This preparation is designed for plumbing professionals pursuing an Oklahoma Plumbing Journeyman license through the Oklahoma Construction Industries Board.

The Oklahoma Plumbing Journeyman and Natural Gas examination covers a broader scope than the Residential Journeyman Plumbing and Natural Gas examination. Candidates preparing for this license should study the 2018 International Plumbing Code and 2018 International Fuel Gas Code with Oklahoma revisions rather than relying on the International Residential Code used for the separate residential examination.

The current examination is administered by PSI after the Oklahoma Construction Industries Board determines that an applicant meets the qualifications to test. The Plumbing Journeyman and Natural Gas exam contains 85 scored questions, provides 180 minutes, and requires a minimum passing score of 75%. The current raw passing score is 64 correct answers.

The examination tests practical plumbing knowledge as well as the ability to navigate approved references. Subjects include plumbing calculations, piping and valves, fixtures, water distribution, drainage, sewers, vents, traps, special waste, isometric drawings, natural gas piping, appliances, combustion air, chimneys, gas-system testing, and OSHA safety requirements.

This online exam prep course is organized around the current examination references: the International Plumbing Code, 2018, International Fuel Gas Code, 2018, Mathematics for Plumbers and Pipefitters, 8th Edition, and Code of Federal Regulations - 29 CFR Part 1926 (OSHA).

Exam Details

The Oklahoma Plumbing Journeyman and Natural Gas examination tests knowledge of the installation, repair, maintenance, and extension of plumbing systems, including sanitary drainage, waste and vents, water supply, plumbing fixtures, roof drains, gas piping, appliances, vents, flues, tanks, and related components in a supervised work environment.

The current examination contains 85 scored questions. Candidates receive 180 minutes, or three hours, to complete the test. A minimum score of 75% is required, with a current raw passing score of 64 correct answers.

General Plumbing Knowledge and Regulations contains 10 questions. Topics include head pressure, pipe joints, solvent-welded joints, area and volume calculations, water-supply friction loss, permits and inspections, job costs, structural notches and bore holes, fire integrity, pipe-offset testing, trenching and backfill, and fitting identification.

Piping, Valves, and Control Valves contains eight questions. Candidates should understand PVC, CPVC, galvanized pipe, copper tubing and piping, polyethylene, PEX, underground piping, cast iron, steel piping, dissimilar-material connections, and valves.

Fixtures and Equipment contains eight questions. This area includes identifying minimum plumbing requirements for structures and facilities and installing fixtures and associated equipment.

Water Supply contains 10 questions covering water-supply and distribution lines, protection of potable water supplies, and backflow requirements.

Drains and Sewers contains 10 questions. Subjects include drain and sewer pipe, building sewers, sewer and drain cleanouts, sewage ejectors and sump pumps, health-care plumbing, drain and waste piping, and storm drainage.

Vents is the largest individual category with 13 questions. Candidates should prepare for vent installation and developed-length concepts along with the broader code requirements governing properly vented drainage systems.

Traps, Interceptors, Indirect, and Special Waste contains five questions. Isometric Analysis contains seven questions requiring candidates to interpret plumbing isometric drawings.

Fuel Gas contains 10 questions. Topics include gas-distribution pipe sizing, pressure regulators, hangers and supports, direction changes, concealed locations, joints and connections, valves, outlets, drip legs and sediment traps, appliances, confined spaces, combustion air, chimneys and vents, permits and inspections, cost estimates, outdoor gas-supply piping, testing and inspection, and pipe-material requirements.

Safety contains four questions covering PPE responsibilities, excavation and trench safety, employee protection, safety training, ventilation, first-aid requirements, signs and barricades, tools, ladders, workplace illumination, scaffolds, toxic materials, cleanup and disposal, material safety data, material handling, and fall protection.

Open Book Test

The Oklahoma Plumbing Journeyman and Natural Gas examination is an open-book test. Candidates are responsible for bringing the approved references they plan to use during the examination.

The current approved code references are the 2018 International Plumbing Code with Oklahoma revisions and the 2018 International Fuel Gas Code with Oklahoma revisions. Code questions are based on the specific editions listed for the examination.

The current examination also permits Mathematics for Plumbers and Pipefitters, 8th Edition and Code of Federal Regulations - 29 CFR Part 1926 (OSHA) with the applicable amendments or PSI selections.

Approved references may be highlighted, underlined, and indexed before the examination. Permanent tabs are permitted and can be useful for organizing major subjects such as water supply, drainage, vents, fixtures, gas sizing, regulators, testing, and safety.

Temporary removable tabs such as Post-it notes are not permitted. Written notes may not be placed in approved references before the examination, and candidates may not write in those references during the testing session.

Additional loose papers are not allowed with approved references. Downloaded materials must be appropriately secured by an accepted binding method such as spiral binding, placement in a binder after hole-punching, or stapling as permitted by the testing rules.

A silent, non-printing, non-programmable calculator may be used. Candidates should become comfortable using a calculator alongside plumbing mathematics and gas-sizing tables before exam day.

With 85 questions in 180 minutes, the average available time is slightly more than two minutes per question. Efficient open-book preparation means recognizing whether a question belongs in the Plumbing Code, Fuel Gas Code, mathematics reference, or OSHA material before beginning a search.

Licensing Steps

1. Begin working in the Oklahoma plumbing trade. The normal licensing path starts with qualifying plumbing experience performed within Oklahoma’s licensing structure.
2. Register as a plumbing apprentice when required. Experience gained in Oklahoma and used toward licensing generally requires proper apprentice registration unless a lawful exception applies.
3. Work for a licensed Plumbing Contractor. Qualifying supervised experience helps build the practical skills required for journeyman licensing.
4. Accumulate the required experience. The standard pathway requires three years of qualifying plumbing trade experience.
5. Use approved plumbing education when applicable. Oklahoma permits qualifying formal plumbing education to substitute for part of the experience requirement.
6. Maintain documentation. Keep apprentice registration records, employment verification, school transcripts, and other documentation needed to establish examination eligibility.
7. Submit the Plumbing License Application. Apply to the Oklahoma Construction Industries Board for Plumbing Journeyman examination approval.
8. Receive authorization to test. The Board reviews the application and determines whether the candidate meets the qualifications for examination.
9. Schedule the examination through PSI. Approved candidates arrange the examination date and location through the testing provider.
10. Prepare the approved references. Organize the 2018 IPC, 2018 IFGC, plumbing mathematics book, and OSHA reference according to current testing rules.
11. Take the Plumbing Journeyman and Natural Gas examination. Complete 85 scored questions within the 180-minute limit.
12. Achieve the required score. Candidates currently need at least 75%, or 64 correct answers.
13. Complete license issuance requirements. Follow the Oklahoma Construction Industries Board process after satisfying the examination and licensing requirements.

State Requirements

Applicants for the Oklahoma Plumbing Journeyman examination must be at least 18 years old.

The standard qualification pathway requires three years of experience in the plumbing trade while employed by a licensed Plumbing Contractor. Oklahoma also recognizes equivalent verifiable three-year plumbing experience obtained while serving in the United States military.

A qualifying out-of-state plumbing license may also be considered when that license is current and in good standing. The Oklahoma Construction Industries Board evaluates the documentation submitted with the application.

Approved plumbing education can substitute for part of the experience requirement. An approved associate degree or Career Tech diploma from a plumbing program containing at least 1,000 classroom hours may substitute for two years of experience.

A qualifying plumbing educational program containing at least 500 classroom hours may substitute for one year of experience. Candidates using formal education should maintain the documentation required to establish completion of the approved program.

When a licensed Oklahoma Plumbing Journeyman performs plumbing work, that work must be performed under a licensed Plumbing Contractor. Journeyman licensing does not independently authorize the license holder to operate as a plumbing contractor.

An Oklahoma Plumbing Journeyman may supervise apprentices within the limits established by state rules and may work on plumbing projects of varying sizes while under the appropriate contractor.

Oklahoma Plumbing Journeymen and Contractors currently must complete six hours of approved continuing education within the 36 months preceding license expiration, subject to applicable rules and exemptions.

If a candidate fails the plumbing examination, the current Oklahoma testing rules require a 30-day waiting period after the first failure. Subsequent failures generally require a 90-day waiting period before another attempt.

Reference Books

• International Plumbing Code, 2018
  The 2018 International Plumbing Code with Oklahoma revisions is the primary plumbing code reference for this examination. It supports preparation involving water supply, drainage, vents, fixtures, piping materials, traps, interceptors, special waste, storm drainage, and other plumbing requirements.
• International Fuel Gas Code, 2018
  The 2018 International Fuel Gas Code with Oklahoma revisions supports preparation involving gas-pipe sizing, pressure regulators, supports, joints, concealed piping, valves, outlets, sediment traps, appliances, combustion air, vents, flues, system testing, and gas-piping materials.
• Mathematics for Plumbers and Pipefitters, 8th Edition
  This trade mathematics reference supports preparation for calculations involving area, volume, pipe offsets, water-supply friction loss, dimensions, measurements, and other mathematical applications encountered in plumbing work.
• Code of Federal Regulations - 29 CFR Part 1926 (OSHA)
  This construction-safety reference supports exam preparation involving excavations, trenches, PPE, ladders, scaffolds, tools, illumination, toxic materials, fall protection, and related workplace-safety requirements.

Test Information and Study Materials

A strong Oklahoma Plumbing Journeyman and Natural Gas study plan should follow the published examination categories and place additional emphasis on the subjects carrying the largest number of questions.

Prioritize Venting. Vents account for 13 questions, making this the largest individual category. Practice locating vent requirements quickly and understanding developed length, installation, and drainage-system relationships.

Study Water Supply and Drainage. Water Supply and Drains and Sewers each contain 10 questions. Review potable-water protection, backflow, distribution piping, drainage, building sewers, cleanouts, ejectors, sump pumps, and storm drainage.

Prepare thoroughly for Fuel Gas. Ten questions address natural gas. Practice sizing, regulator requirements, supports, valves, sediment traps, appliances, combustion air, vents, testing, and material requirements.

Review General Plumbing Knowledge. Practice head-pressure concepts, pipe joints, calculations, friction loss, permits, inspections, structural penetrations, trenching, backfill, and fitting identification.

Practice Isometric Analysis. Seven questions involve isometric drawings. Become comfortable tracing drains, vents, fixtures, and piping relationships from three-dimensional representations.

Learn piping materials and connections. Review PVC, CPVC, galvanized piping, copper, polyethylene, PEX, cast iron, steel, underground piping, dissimilar materials, valves, and approved connections.

Use Mathematics for Plumbers and Pipefitters actively. Work calculation problems instead of only reading examples. Practice area, volume, offsets, water-supply friction loss, and other trade mathematics.

Know when to use OSHA. Safety questions should lead directly to the OSHA reference rather than unnecessary searching through the plumbing or fuel-gas codes.

Practice timed open-book sessions. Use the 180-minute limit as your benchmark. Develop a strategy for answering familiar questions quickly and flagging detailed code searches for later review.

Review missed questions by category. Track errors in general plumbing, piping, fixtures, water supply, drainage, vents, traps, isometrics, fuel gas, mathematics, and safety. Use those results to organize future study.

How 1 Exam Prep Helps You Reach Your Goal

1 Exam Prep helps Oklahoma Plumbing Journeyman and Natural Gas candidates organize preparation around the technical subjects and approved references used for the current licensing examination.

Trade-focused review reinforces plumbing systems, drainage, water supply, fixtures, vents, piping materials, natural gas systems, calculations, and isometric analysis. Candidates can use organized study to identify technical subjects that need additional attention before test day.

Reference-navigation preparation helps students become familiar with the 2018 International Plumbing Code, 2018 International Fuel Gas Code, Mathematics for Plumbers and Pipefitters, and OSHA regulations. Knowing which reference applies to a question can reduce wasted time during an open-book exam.

Practice-oriented preparation supports better pacing for an 85-question, three-hour examination. It also provides a structured way to review missed questions and strengthen weaker areas such as venting, gas sizing, drainage, water supply, calculations, or safety.

1 Exam Prep provides organized study guidance, plumbing-focused review, natural gas preparation, reference navigation, calculation practice, isometric review, and confidence-building study structure to support professionals working toward the Oklahoma Plumbing Journeyman license.

FAQ Section

Who licenses Plumbing Journeymen in Oklahoma?

The Oklahoma Construction Industries Board administers statewide plumbing licensing, including Plumbing Journeyman licensing.

Who administers the Oklahoma Plumbing Journeyman and Natural Gas exam?

PSI administers the examination after the Oklahoma Construction Industries Board determines that the applicant is eligible to test.

Is the Oklahoma Plumbing Journeyman and Natural Gas exam open book?

Yes. The current examination is open book and permits approved reference materials under PSI testing rules.

How many questions are on the exam?

The current examination contains 85 scored questions.

How much time is allowed?

Candidates receive 180 minutes, or three hours.

What score is required to pass?

The current passing requirement is 75%, with a raw passing score of 64 correct answers.

What plumbing code is used for this examination?

The current exam uses the 2018 International Plumbing Code with Oklahoma revisions.

What fuel gas code is used?

The current examination uses the 2018 International Fuel Gas Code with Oklahoma revisions.

Is this the same exam as Residential Journeyman Plumbing and Natural Gas?

No. The Residential Journeyman examination is a separate license examination and uses the 2018 International Residential Code. The Plumbing Journeyman and Natural Gas examination uses the 2018 International Plumbing Code and 2018 International Fuel Gas Code.

What is the largest exam category?

Vents is the largest individual category with 13 questions.

How many Fuel Gas questions are included?

The current examination contains 10 Fuel Gas questions.

Can I highlight and underline my books?

Yes. Approved references may be highlighted, underlined, and indexed before the examination.

Can I use permanent tabs?

Yes. Permanent tabs are permitted. Temporary removable tabs such as Post-it notes are not allowed.

Can I write notes in my exam references?

No. Written notes are prohibited in approved reference materials before or during the examination.

How much experience is required for an Oklahoma Plumbing Journeyman license?

The standard qualification pathway requires three years of qualifying plumbing trade experience while employed by a licensed Plumbing Contractor. Approved education may substitute for part of that experience.

Can an Oklahoma Plumbing Journeyman work independently as a contractor?

No. Plumbing work performed by a licensed journeyman must be performed under a licensed Plumbing Contractor. Separate contractor licensing is required to operate as a plumbing contractor.

Does Oklahoma require continuing education for Plumbing Journeymen?

Yes. Oklahoma Plumbing Journeymen currently must complete six hours of approved continuing education within the 36 months preceding license expiration, subject to applicable requirements and exemptions.

What happens if I fail the exam?

Current Oklahoma testing rules require a 30-day wait after the first failed attempt. Subsequent failures generally require a 90-day waiting period before another attempt.

Does this online exam prep course guarantee a passing score?

No exam-preparation course can guarantee a passing result. This course provides organized plumbing review, natural gas preparation, code navigation, mathematics practice, isometric study, safety review, and structured exam preparation to support your study.