Oklahoma HVACR Journeyman Unlimited Contractor Exam - Online Exam Prep Course

Prepare for the Oklahoma HVACR Journeyman Unlimited examination with an online exam prep course focused on the technical knowledge, code navigation, calculations, and reference skills associated with Oklahoma's Unlimited HVACR Journeyman classification. This course is designed to help candidates organize their study around the subjects tested by PSI while building familiarity with the references used for open-book testing.

The Oklahoma HVACR Journeyman Unlimited Contractor Exam - Online Exam Prep Course focuses on mechanical code requirements, fuel gas systems, refrigeration and air conditioning, heating systems, electrical knowledge and controls, air distribution, trade mathematics, and construction safety. Candidates can use the course alongside the reference materials associated with the examination to create a structured and practice-oriented study routine.

The Oklahoma HVACR Unlimited Journeyman classification covers qualifying cooling systems, heating equipment, refrigeration, sheet metal, natural gas piping, process piping, and related HVACR work without the cooling-capacity and heating-input restrictions that apply to the HVACR Limited Journeyman category.

Because the examination is open book, effective preparation involves two complementary skills: understanding HVACR concepts and knowing how to navigate the approved references. Candidates should practice recognizing the subject of a question, identifying the appropriate reference, and locating relevant code provisions, technical explanations, formulas, tables, and safety requirements efficiently.

Exam Details

The Oklahoma HVACR Journeyman Unlimited examination tests knowledge of the installation, maintenance, repair, fabrication, alteration, and extension of air conditioning, refrigeration, heating, and ventilating systems. The scope includes ductwork within a complete system unlimited in horsepower or tons, together with related appurtenances, piping, vessels, ducts, and insulation while employed by an HVACR contractor.

• Exam: Oklahoma HVACR Journeyman Unlimited
• Testing Provider: PSI
• Number of Questions: 70
• Time Allowed: 180 minutes
• Passing Score: 70%
• Passing Raw Score: 49 correct answers
• Exam Format: Open book

The examination is divided among six major content areas. Electrical Knowledge and Controls contains 15 questions. Natural Gas contains 10 questions. Air Distribution Systems contains 16 questions. Refrigeration and Air Conditioning Systems contains 16 questions. Heating Systems contains 10 questions, and Safety contains 3 questions.

Electrical Knowledge and Controls includes general electrical theory and knowledge, motors, DC circuits, AC circuits, and controls. HVACR technicians regularly work with electrical components and control systems, so candidates should be comfortable connecting basic electrical principles with HVACR equipment operation and troubleshooting.

Natural Gas includes piping valves, connectors, accessories, hangers and supports, sizing, materials, testing, installation, and assembly. Candidates should understand practical fuel gas concepts while also becoming familiar with the structure of the International Fuel Gas Code.

Air Distribution Systems covers duct definitions, sizing and design, assembly and installation, hangers and supports, duct materials and shapes, insulation, fire and smoke control, hoods and exhaust systems, testing and balancing, ventilation requirements, plans, and symbols.

Refrigeration and Air Conditioning Systems includes theory, refrigerants, equipment sizing and design, equipment and components, piping, equipment installation, system operation, troubleshooting, and maintenance. Heating Systems includes heating theory and types, combustion air, vents and chimneys, equipment sizing, heating equipment, equipment installation, hydronics and hydronic piping, system operation, troubleshooting, and maintenance.

Safety topics include personal protective equipment, safety training, employee ventilation, first aid requirements, work around toxic materials, fall protection, lockout/tagout procedures, ladders, scaffolds, and related construction safety responsibilities.

Open Book Test

The Oklahoma HVACR Journeyman Unlimited examination is an open book test. Candidates may bring approved reference materials into the examination center under PSI's reference rules.

Reference materials may be highlighted, underlined, and indexed before the examination session. Permanent tabs are permitted. Temporary tabs such as Post-it notes are not allowed, and candidates may not write in their references before or during the examination.

Open-book testing makes navigation skills especially important. With 70 questions and 180 minutes, candidates need to manage their time carefully. Searching through every book for every question can quickly consume valuable testing time.

The course supports a more organized approach. First identify the subject of the question. Then determine which reference is most likely to contain the applicable information. After selecting the reference, use the index, chapter structure, table of contents, definitions, or permanent tabs to locate the answer efficiently.

Mechanical installation, ventilation, ductwork, equipment, refrigeration-code, combustion-air, chimney, and vent questions may involve the International Mechanical Code. Fuel gas piping, materials, sizing, connectors, appliances, testing, combustion air, and venting may involve the International Fuel Gas Code.

Modern Refrigeration and Air Conditioning supports broader technical topics involving refrigeration theory, refrigerants, heating, air conditioning, equipment, controls, system operation, service, maintenance, and troubleshooting. Mathematics for Plumbers and Pipefitters supports trade calculations, while 29 CFR Part 1926 supports construction-safety preparation.

Modern Refrigeration and Air Conditioning, 22nd Edition is permitted for this examination beginning August 13, 2026.

Licensing Steps

Oklahoma mechanical journeyman licensing is administered by the Oklahoma Construction Industries Board. Candidates must satisfy the applicable licensing qualifications in addition to preparing for and passing the examination.

1. Gain qualifying HVACR experience. Build verifiable mechanical trade experience in the HVACR category for which you are applying.
2. Meet journeyman qualifications. Oklahoma recognizes qualifying experience and approved combinations of formal mechanical education and trade experience.
3. Qualify for the Unlimited category. Experience used for the Unlimited classification must demonstrate work appropriate to the unrestricted HVACR scope.
4. Submit the mechanical license application. Apply through the Oklahoma Construction Industries Board for the HVACR Unlimited Journeyman classification.
5. Receive approval to test. The state reviews the application and determines examination eligibility.
6. Schedule the PSI examination. Approved applicants complete the testing-provider scheduling process.
7. Prepare for the open-book examination. Study the technical categories while practicing use of the approved references.
8. Complete the licensing process. After meeting examination requirements, follow the Oklahoma Construction Industries Board process for obtaining and maintaining the journeyman license.

Exam preparation should be coordinated with the licensing process so candidates understand both the technical knowledge being tested and the scope of the credential they are pursuing.

State Requirements

The Oklahoma HVACR Unlimited Journeyman classification authorizes the licensee to install, alter, modify, service, maintain, or repair qualifying cooling products, systems, or equipment, including process piping, without the 25-ton cooling-capacity restriction that applies to the HVACR Limited Journeyman classification.

The Unlimited classification also covers heating equipment, including process piping, without the 500,000 Btu/h per-appliance limitation associated with the Limited classification.

Qualifying sheet metal, natural gas piping, and refrigeration work are also included within the scope of the HVACR Unlimited Journeyman license.

Mechanical journeyman applicants must satisfy Oklahoma's applicable experience or education-and-experience requirements. The Unlimited category requires experience appropriate to work beyond the capacity limitations of the HVACR Limited classification.

The journeyman credential operates within Oklahoma's mechanical licensing structure, and a journeyman performs licensed work while working for the applicable mechanical contractor. Candidates should understand the difference between journeyman and contractor licensing when planning their career path.

Reference Books

The Oklahoma HVACR Journeyman Unlimited Contractor Exam - Online Exam Prep Course is structured around the following examination references:

• International Mechanical Code, 2018
  Covers mechanical systems, equipment, ventilation, ductwork, exhaust systems, refrigeration, combustion air, chimneys, vents, and related installation requirements. Candidates should practice using the index, chapter structure, definitions, tables, and code sections while preparing.
• International Fuel Gas Code, 2018
  Covers fuel gas piping, sizing, materials, valves, connectors, appliance installation, testing, combustion air, venting, and related requirements. This reference is particularly useful for Natural Gas and heating-related preparation.
• Modern Refrigeration and Air Conditioning, 22nd Edition
  Provides comprehensive HVACR technical coverage involving refrigeration theory, refrigerants, air conditioning, heating, electrical principles, controls, motors, components, installation, system operation, service, maintenance, and troubleshooting.
• Mathematics for Plumbers and Pipefitters, 8th Edition
  Supports trade-oriented mathematics involving measurements, formulas, conversions, area, volume, piping calculations, and other practical mathematical applications used in mechanical work.
• Code of Federal Regulations - 29 CFR Part 1926 (OSHA)
  Contains federal construction-industry safety requirements. It supports preparation involving personal protective equipment, fall protection, employee safety, ladders, scaffolds, toxic materials, lockout/tagout, and other construction safety topics.

The reference books serve different purposes during preparation. The International Mechanical Code and International Fuel Gas Code support code-based research. Modern Refrigeration and Air Conditioning provides broad technical HVACR coverage. Mathematics for Plumbers and Pipefitters supports calculation practice, while 29 CFR Part 1926 supports safety review.

Candidates should use the references actively while completing course study. Instead of memorizing where every answer is located, develop familiarity with how each book is organized and which reference is most appropriate for each subject.

Exam Room Approved Books

The International Mechanical Code, 2018; International Fuel Gas Code, 2018; Modern Refrigeration and Air Conditioning; Mathematics for Plumbers and Pipefitters, 8th Edition; and Code of Federal Regulations - 29 CFR Part 1926 are included on PSI's reference list for the HVACR Journeyman Unlimited examination.

For code questions, PSI bases the examination on the specific code edition listed. Candidates preparing with the International Mechanical Code and International Fuel Gas Code should therefore work with the specified 2018 editions and applicable Oklahoma revisions.

Modern Refrigeration and Air Conditioning, 22nd Edition becomes an allowed examination reference beginning August 13, 2026. The current PSI bulletin also permits the 20th and 21st editions during the applicable transition period.

PSI permits reference materials to be highlighted, underlined, and indexed before testing. Permanent tabs are allowed, while temporary tabs such as Post-it notes are prohibited. Additional loose papers may not be brought into the examination with the approved references.

Test Information and Study Materials

A strong Oklahoma HVACR Journeyman Unlimited study plan should balance technical knowledge with reference navigation. The exam moves across multiple HVACR subjects, so preparation should not focus on only one code book or one area of field experience.

Electrical Knowledge and Controls accounts for 15 questions. Review electrical theory, motors, AC and DC circuits, and HVACR control concepts. Candidates with extensive mechanical field experience but less electrical troubleshooting experience may benefit from dedicating additional study time to this category.

Natural Gas accounts for 10 questions. Study piping, valves, connectors, supports, sizing, materials, testing, installation, and assembly. Practice locating applicable requirements in the International Fuel Gas Code rather than relying only on memorized rules.

Air Distribution Systems contains 16 questions. Review duct sizing and design, materials, installation, supports, insulation, fire and smoke control, hoods, exhaust systems, ventilation requirements, testing and balancing, and plan interpretation.

Refrigeration and Air Conditioning Systems also contains 16 questions. Review refrigeration theory, refrigerants, system components, piping, equipment sizing and design, installation, operation, troubleshooting, and maintenance. Use Modern Refrigeration and Air Conditioning during these study sessions to connect technical review with reference navigation.

Heating Systems contains 10 questions. Review combustion air, vents and chimneys, equipment sizing, heating equipment, installation, hydronics, hydronic piping, system operation, maintenance, and troubleshooting.

Safety contains 3 questions. Although it represents a smaller portion of the examination, candidates should still become familiar with OSHA requirements covering personal protective equipment, safety training, ventilation, first aid, toxic materials, fall protection, lockout/tagout, ladders, and scaffolds.

Trade mathematics should also be part of preparation. Practice working with measurements, formulas, conversions, area, volume, and other mechanical calculations instead of relying entirely on memorized formulas.

Timed practice can help candidates develop an effective strategy for the 180-minute examination. Some questions may be answered from trade knowledge, while others require a code lookup, technical reference, or calculation. Learning when to use a reference is as important as learning how to use it.

A useful study method is mixed-reference practice. Move between electrical controls, natural gas, ductwork, refrigeration, heating, safety, and mathematics during a single session. Before opening a reference, decide which book is most likely to contain the information.

This process helps develop subject recognition and reduces random searching. Over time, candidates can become more comfortable moving between the International Mechanical Code, International Fuel Gas Code, Modern Refrigeration and Air Conditioning, Mathematics for Plumbers and Pipefitters, and OSHA regulations.

How 1 Exam Prep Helps You Reach Your Goal

1 Exam Prep supports Oklahoma HVACR Journeyman Unlimited candidates through organized study guidance, trade-focused review, practice-oriented preparation, reference navigation, and confidence-building study structure.

The online exam prep course helps break a broad HVACR examination into manageable areas. Candidates can focus on electrical controls, natural gas, air distribution, refrigeration, heating, mathematics, safety, and code navigation instead of attempting to study every subject at once.

Reference navigation is an important part of the preparation approach because the examination is open book. Candidates can practice identifying the appropriate reference and locating useful chapters, code sections, tables, formulas, definitions, and technical explanations.

Trade-focused review can also reveal weaker areas. An experienced refrigeration technician may need additional practice with electrical controls or fuel gas codes. A candidate with strong installation experience may need more work with mathematics, hydronics, code navigation, or OSHA safety requirements.

Practice-oriented preparation helps connect what candidates already know from field experience with the material they may encounter during licensing testing. Using the reference books during study can reinforce technical concepts while building familiarity with the resources available during the examination.

1 Exam Prep provides a structured approach to preparation so candidates can study with purpose, strengthen weaker areas, and build confidence through consistent review and practice. The course supports preparation for the examination without guaranteeing passing, licensing approval, or any specific testing outcome.

FAQ Section

What does the Oklahoma HVACR Journeyman Unlimited Online Exam Prep Course cover?

The course covers Electrical Knowledge and Controls, Natural Gas, Air Distribution Systems, Refrigeration and Air Conditioning Systems, Heating Systems, Safety, trade mathematics, code navigation, and open-book exam preparation.

Is the Oklahoma HVACR Journeyman Unlimited exam open book?

Yes. PSI lists the Oklahoma HVACR Journeyman Unlimited examination as open book and allows approved references under its examination-center rules.

How many questions are on the Oklahoma HVACR Journeyman Unlimited exam?

The examination contains 70 questions, and candidates receive 180 minutes to complete it.

What score is required to pass?

The passing score is 70 percent, which corresponds to 49 correct answers on the 70-question examination.

What subjects have the most questions?

Air Distribution Systems and Refrigeration and Air Conditioning Systems each contain 16 questions. Electrical Knowledge and Controls contains 15 questions.

What references are used with this course?

The reference list includes the International Mechanical Code, 2018; International Fuel Gas Code, 2018; Modern Refrigeration and Air Conditioning, 22nd Edition; Mathematics for Plumbers and Pipefitters, 8th Edition; and Code of Federal Regulations - 29 CFR Part 1926.

Can I use Modern Refrigeration and Air Conditioning, 22nd Edition on the exam?

PSI permits Modern Refrigeration and Air Conditioning, 22nd Edition beginning August 13, 2026.

What is the difference between Oklahoma HVACR Limited and Unlimited Journeyman licensing?

The Limited classification has cooling-capacity and heating-input restrictions. The HVACR Unlimited Journeyman classification covers qualifying HVACR work without those equipment-capacity limits.

Does the online course replace the exam references?

No. The online course provides structured preparation and reference-navigation guidance. Candidates should also become familiar with the approved references they plan to use during open-book testing.

Can approved references be highlighted and tabbed?

PSI allows approved references to be highlighted, underlined, and indexed before the exam. Permanent tabs are permitted, while temporary tabs such as Post-it notes are not allowed.

How should I study for the Oklahoma HVACR Journeyman Unlimited exam?

Combine technical review with practice questions, trade calculations, code navigation, safety study, and timed reference lookups. Practice identifying the correct reference before searching for information.

Does passing the exam automatically make me licensed?

No. Examination completion is one part of Oklahoma's licensing process. Applicants must also satisfy the applicable experience, application, and licensing requirements established by the Oklahoma Construction Industries Board.