Oklahoma HVACR Journeyman Unlimited Contractor Highlighted & Tabbed Book Package

Prepare for the Oklahoma HVACR Journeyman Unlimited examination with a professionally organized collection of highlighted and tabbed technical reference books. This package is designed for candidates who want to spend more of their preparation time studying HVACR concepts, practicing reference navigation, and becoming familiar with the books used for open-book testing.

The Oklahoma HVACR Journeyman Unlimited Contractor Highlighted & Tabbed Book Package 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 (OSHA).

Each included book is highlighted and tabbed to support organized study and faster reference navigation. Highlighting draws attention to useful material, while permanent tabs help separate important chapters and subjects. Candidates can use the prepared references throughout their study period to become familiar with code provisions, definitions, technical tables, formulas, HVACR concepts, and construction safety information.

The Oklahoma HVACR Journeyman Unlimited classification covers qualifying HVACR work without the cooling-capacity and heating-input restrictions associated with the HVACR Limited Journeyman classification. Candidates preparing for the Unlimited examination should therefore be ready to review a broad range of heating, refrigeration, air conditioning, ventilation, natural gas, air distribution, electrical control, mathematics, and safety concepts.

Please allow up to 15 business days for highlighted and tabbed book package orders.

Exam Details

The Oklahoma HVACR Journeyman Unlimited examination evaluates a candidate's knowledge of the installation, maintenance, repair, fabrication, alteration, and extension of air conditioning, refrigeration, heating, and ventilating systems, including ductwork within complete systems unlimited in horsepower or tons, 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 covers several important areas of HVACR trade knowledge. Candidates should prepare for Electrical Knowledge and Controls, Natural Gas, Air Distribution Systems, Refrigeration and Air Conditioning Systems, Heating Systems, and Safety.

Electrical Knowledge and Controls can include general electrical theory, motors, AC and DC circuits, and controls. These concepts are important because HVACR systems depend on electrical components and controls for equipment operation, system sequencing, service, and troubleshooting.

Natural Gas preparation includes piping, valves, connectors, accessories, hangers and supports, materials, sizing, testing, and installation. The International Fuel Gas Code is an important resource for candidates reviewing these subjects.

Air Distribution Systems includes duct sizing and design, assembly and installation, supports, materials, insulation, ventilation requirements, exhaust systems, fire and smoke control, testing and balancing, and plans and symbols. Candidates should understand both practical air-distribution concepts and applicable mechanical requirements.

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

Open Book Test

The Oklahoma HVACR Journeyman Unlimited examination is an open book test. Candidates may bring approved reference materials into the examination center according to PSI testing rules.

PSI allows qualifying reference materials to be highlighted, underlined, and indexed before the examination. Permanent tabs are permitted. Temporary tabs such as Post-it notes are not permitted, and references may not contain written notes.

The highlighted and tabbed books in this package are designed to support that open-book preparation process. Using prepared references during study can help candidates become familiar with how information is organized instead of trying to learn the structure of several books on examination day.

An open-book exam still requires solid HVACR knowledge. Candidates receive 180 minutes to complete 70 questions, so reference lookups need to be purposeful. Some questions can be answered directly from trade knowledge, while others may require confirmation from a code, technical reference, calculation, or safety standard.

Mechanical installation, ventilation, ductwork, equipment, combustion air, and related requirements may lead candidates to the International Mechanical Code. Fuel gas piping, sizing, materials, appliances, combustion air, testing, and venting may require the International Fuel Gas Code.

Modern Refrigeration and Air Conditioning can support questions involving refrigeration principles, heating, controls, electrical concepts, system components, service, operation, and troubleshooting. Mathematics for Plumbers and Pipefitters supports calculation preparation, while 29 CFR Part 1926 provides construction-industry safety standards.

Modern Refrigeration and Air Conditioning, 22nd Edition becomes permitted for the applicable PSI examination beginning August 13, 2026.

Licensing Steps

Oklahoma mechanical journeyman licensing is administered by the Oklahoma Construction Industries Board. Candidates pursuing the HVACR Unlimited Journeyman classification must complete the applicable experience, application, examination, and licensing requirements.

1. Gain qualifying mechanical trade experience. Build verifiable experience performing HVACR work appropriate to the Unlimited Journeyman category.
2. Meet the applicable journeyman qualifications. Oklahoma recognizes qualifying experience and approved education-and-experience pathways for mechanical journeyman applicants.
3. Document Unlimited-level experience. Experience used to qualify for HVACR Unlimited licensing must demonstrate work above the capacity thresholds associated with the HVACR Limited classification.
4. Submit the mechanical journeyman application. Apply through the Oklahoma Construction Industries Board for the HVACR Unlimited Journeyman category.
5. Receive approval to test. Examination eligibility is determined through the state application process.
6. Schedule the examination. Approved candidates arrange their testing appointment through PSI.
7. Prepare for the open-book exam. Review HVACR technical concepts and become familiar with the approved reference materials.
8. Complete the licensing process. After satisfying the examination requirements, follow the Oklahoma Construction Industries Board process for obtaining and maintaining the journeyman license.

State Requirements

The Oklahoma HVACR Unlimited Journeyman classification allows qualifying work involving cooling products, systems, and equipment, including process piping, without the 25-ton cooling-capacity restriction associated with the HVACR Limited classification.

The Unlimited classification also covers heating equipment, including related process piping, without the 500,000 Btu/h per-appliance limitation that applies to HVACR Limited licensing.

Qualifying refrigeration, sheet metal, natural gas piping, and related process piping work are included within the HVACR Unlimited category.

Oklahoma requires applicants for mechanical journeyman licensing to meet applicable age, experience, application, and examination requirements. Applicants seeking the HVACR Unlimited classification must document qualifying work above 25 tons and 500,000 Btu/h to demonstrate experience appropriate to the Unlimited category.

A licensed mechanical journeyman works for an active licensed mechanical contractor while performing work within the scope of the journeyman classification. Understanding the license scope is therefore important both for examination preparation and for performing licensed work after the credential is issued.

Reference Books

The following highlighted and tabbed references are included with the Oklahoma HVACR Journeyman Unlimited Contractor package:

• International Mechanical Code, 2018
  Covers mechanical systems, equipment, ventilation, duct systems, exhaust systems, refrigeration, combustion air, chimneys, vents, and related installation requirements. The highlighted and tabbed format provides an organized way to practice navigating code chapters and requirements.
• International Fuel Gas Code, 2018
  Covers fuel gas piping systems, sizing, materials, valves, connectors, appliance requirements, testing, combustion air, venting, and related provisions. Candidates can use this reference when preparing for natural gas and heating-related subjects.
• Modern Refrigeration and Air Conditioning, 22nd Edition
  Provides comprehensive HVACR technical material covering refrigeration theory, refrigerants, air conditioning, heating, electrical principles, controls, motors, system components, installation, operation, service, maintenance, and troubleshooting.
• Mathematics for Plumbers and Pipefitters, 8th Edition
  Provides trade-oriented mathematics covering measurements, formulas, conversions, area, volume, piping calculations, and other practical mathematical concepts relevant to mechanical work.
• Code of Federal Regulations - 29 CFR Part 1926 (OSHA)
  Contains federal construction-industry safety standards covering workplace hazards, personal protective equipment, fall protection, ladders, scaffolds, employee protection, and other construction safety requirements.

Each reference serves a different role during preparation. The mechanical and fuel gas codes support code-based research. Modern Refrigeration and Air Conditioning supports broader HVACR technical knowledge. Mathematics for Plumbers and Pipefitters reinforces practical calculations, while OSHA regulations support construction safety study.

Using the highlighted and tabbed references throughout preparation can help candidates create stronger familiarity with the material. The goal is to learn which book applies to a particular subject and where important information is located within that reference.

Exam Room Approved Books

The references in this package are among the materials allowed for the Oklahoma HVACR Journeyman Unlimited examination: 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.

The listed code editions are the 2018 International Mechanical Code and 2018 International Fuel Gas Code with Oklahoma revisions. Candidates should practice using these specific code editions when preparing for code-related questions.

Modern Refrigeration and Air Conditioning, 22nd Edition becomes permitted for exam-room use beginning August 13, 2026.

Approved references may be highlighted, underlined, and indexed under PSI's physical-reference rules. Permanent tabs are allowed. Candidates should use these navigation aids together with regular study rather than relying on tabs alone.

Test Information and Study Materials

A productive Oklahoma HVACR Journeyman Unlimited study plan combines technical review, calculations, code navigation, reference practice, and construction safety preparation.

Begin with Refrigeration and Air Conditioning Systems. Review refrigeration theory, refrigerants, equipment sizing, system components, piping, installation, operation, maintenance, and troubleshooting. Work with Modern Refrigeration and Air Conditioning throughout your preparation to develop familiarity with where technical subjects are located.

Air Distribution Systems should include duct sizing and design, installation, materials, supports, insulation, ventilation, exhaust, fire and smoke requirements, testing and balancing, and plans and symbols. Mechanical code navigation can be important when reviewing these areas.

Electrical Knowledge and Controls should include electrical fundamentals, motors, circuits, and controls as they apply to HVACR systems. Candidates who work primarily on mechanical portions of equipment may benefit from dedicating additional study time to electrical and control concepts.

Natural Gas preparation should include piping, valves, connectors, supports, materials, sizing, testing, combustion air, appliance requirements, and venting. Practice using the International Fuel Gas Code while studying these topics so the location of important provisions becomes more familiar.

Heating preparation should include heating theory, equipment, combustion air, vents and chimneys, equipment sizing, hydronic systems, installation, operation, troubleshooting, and maintenance.

Trade mathematics should be practiced through actual calculations. Review measurements, conversions, formulas, area, volume, and other mechanical applications. Solving problems repeatedly is more useful than simply reviewing formulas without applying them.

Safety preparation should involve direct use of 29 CFR Part 1926. Become comfortable locating OSHA provisions involving personal protective equipment, fall protection, ladders, scaffolds, workplace hazards, and employee protection.

A useful open-book study method is mixed-reference practice. Work through questions from several technical areas in a single session. Before opening a book, determine which reference should contain the information. Then use the tabs, index, chapters, and tables to locate the material.

This process helps connect the subject matter with the books. Repeated practice can make it easier to recognize when the International Mechanical Code, International Fuel Gas Code, HVACR textbook, mathematics reference, or OSHA material is the most appropriate source.

The highlighted and tabbed format supports efficient navigation, but technical understanding remains essential. Candidates should use the books as tools that support knowledge rather than treating open-book testing as an alternative to learning the material.

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.

Highlighted and tabbed books provide candidates with an organized starting point for working through mechanical code requirements, fuel gas systems, refrigeration, heating, electrical controls, air distribution, mathematics, and OSHA construction safety.

1 Exam Prep encourages candidates to work with the references throughout preparation. Repeated navigation can help develop familiarity with chapters, indexes, code sections, tables, formulas, definitions, and technical explanations.

Trade-focused review can also help candidates identify weaker areas. Someone with extensive refrigeration experience may need additional review of natural gas codes, electrical controls, mathematics, or OSHA requirements. Another candidate may be comfortable with field installation but need more practice navigating code books under time limits.

Combining organized books with practice-oriented preparation helps create a structured study routine. The objective is to strengthen both HVACR knowledge and reference-navigation skills so candidates can approach the Oklahoma HVACR Journeyman Unlimited examination with confidence built through preparation.

FAQ Section

What books are included in the Oklahoma HVACR Journeyman Unlimited Highlighted & Tabbed Book Package?

The package 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 (OSHA).

Are the books highlighted and tabbed?

Yes. The included books are highlighted and tabbed to support organized study and more efficient reference navigation.

How long should I allow for my order?

Please allow up to 15 business days for highlighted and tabbed book package orders.

Is the Oklahoma HVACR Journeyman Unlimited examination open book?

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

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

The examination contains 70 questions. Candidates receive 180 minutes to complete the test.

What score is required to pass?

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

What does the HVACR Unlimited Journeyman classification cover?

The classification covers qualifying cooling and heating systems without the capacity limitations of the HVACR Limited category and includes refrigeration, sheet metal, natural gas piping, and related process piping within the license scope.

Can approved exam books be highlighted and tabbed?

Yes. Approved references may be highlighted, underlined, and indexed before testing. Permanent tabs are permitted under PSI's reference rules.

When can Modern Refrigeration and Air Conditioning, 22nd Edition be used?

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

How should I study with highlighted and tabbed books?

Use the books alongside technical study and practice questions. Learn which reference applies to each subject and practice locating code sections, tables, formulas, technical information, calculations, and safety requirements efficiently.

Do highlighted and tabbed books replace exam preparation?

No. Highlighting and tabs are navigation tools. Candidates should still study HVACR concepts, practice calculations, review code requirements, and become familiar with each reference before testing.