Oklahoma HVACR Limited Journeyman Contractor - Book Rental Package

Prepare for the Oklahoma HVACR Journeyman Limited examination with a convenient rental package containing key technical references used for HVACR exam preparation. This package gives candidates access to mechanical code, fuel gas, refrigeration and air conditioning, trade mathematics, and OSHA construction safety materials without requiring the purchase of every included book.

The Oklahoma HVACR Journeyman Limited Contractor - Book Rental 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).

All rental books are highlighted and tabbed to support organized study and faster reference navigation. The Oklahoma HVACR Journeyman Limited examination is open book, making familiarity with the approved references an important part of preparation. Candidates can use the rental period to practice locating code sections, technical explanations, formulas, tables, definitions, installation requirements, and safety information.

Please allow up to 15 business days for book and course rental package orders. Ordering with sufficient lead time gives you an opportunity to become familiar with the highlighted and tabbed references before your examination date.

Exam Details

The Oklahoma HVACR Journeyman Limited examination tests technical knowledge associated with the installation, maintenance, repair, fabrication, alteration, and extension of air conditioning, refrigeration, heating, and ventilation systems, including ductwork, within the limits of the HVACR Limited Journeyman classification.

• Exam: Oklahoma HVACR Journeyman Limited
• Testing Provider: PSI
• Number of Questions: 60
• Time Allowed: 180 minutes
• Passing Score: 70%
• Passing Raw Score: 42 correct answers
• Exam Format: Open book

The examination covers six major technical areas: Electrical Knowledge and Controls, Natural Gas, Air Distribution Systems, Refrigeration and Air Conditioning Systems, Heating Systems, and Safety. These areas reflect the range of knowledge an HVACR journeyman may need when working with mechanical equipment and systems.

Electrical Knowledge and Controls includes general electrical theory, motors, DC circuits, AC circuits, and controls. Candidates should understand how electrical components and controls relate to HVACR equipment operation and troubleshooting.

Natural Gas includes piping valves, connectors, accessories, hangers and supports, sizing, materials, testing, installation, and assembly. The International Fuel Gas Code is an important reference for reviewing many of these requirements.

Air Distribution Systems covers duct definitions, sizing and design, duct assembly and installation, hangers and supports, 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 refrigeration theory, refrigerants, equipment sizing and design, equipment and components, piping, installation, system operation, troubleshooting, and maintenance. Heating Systems covers heating theory, combustion air, vents and chimneys, equipment sizing, heating equipment, installation, operation, troubleshooting, maintenance, hydronics, and hydronic piping.

Safety topics include personal protective equipment, employee safety training, ventilation, first aid, hazardous and toxic materials, fall protection, lockout/tagout, ladders, scaffolds, and other construction workplace safety subjects.

Open Book Test

The Oklahoma HVACR Journeyman Limited examination is an open book test. Candidates may bring approved reference materials into the examination center under the testing provider’s rules.

PSI permits approved reference materials to be highlighted, underlined, and indexed before the examination. Permanent tabs may be used. Temporary tabs such as Post-it notes are not permitted. References may not contain written notes, and candidates may not write in their books during the examination session.

The highlighted and tabbed books supplied with this rental package can help candidates build familiarity with reference navigation during preparation. Instead of trying to discover the organization of a code book during the examination, candidates can practice moving between chapters, tables, definitions, indexes, and technical sections beforehand.

An open-book test still requires solid trade knowledge. With 60 questions and 180 minutes, candidates should avoid depending on lengthy book searches for every answer. A useful preparation strategy is to first determine what subject a question covers and then decide which reference is most likely to contain the information.

Mechanical installation and ventilation questions may direct you toward the International Mechanical Code. Fuel gas piping, sizing, combustion air, and venting questions may involve the International Fuel Gas Code. Refrigeration, heating, electrical controls, equipment, system operation, and troubleshooting topics may involve Modern Refrigeration and Air Conditioning.

Mathematics for Plumbers and Pipefitters supports preparation for trade calculations, while 29 CFR Part 1926 provides construction safety requirements. Learning the role of each reference can reduce unnecessary searching during practice.

PSI lists Modern Refrigeration and Air Conditioning, 22nd Edition as permitted for this examination beginning August 13, 2026. Candidates testing before that date must follow the reference-edition rules applicable to their examination date.

Licensing Steps

The Oklahoma Construction Industries Board administers mechanical journeyman licensing. Candidates seeking an HVACR Limited Journeyman license must complete the applicable state licensing process as well as the required examination.

1. Train in the mechanical trade. Gain qualifying experience in the mechanical category in which you plan to become licensed.
2. Meet Oklahoma journeyman qualifications. Applicants must satisfy one of the approved combinations of mechanical trade experience and qualifying education established by the state.
3. Submit the Mechanical Journeyman License Application. Apply through the Oklahoma Construction Industries Board for the appropriate HVACR category.
4. Receive approval to test. The application must be reviewed and approved before the applicant proceeds with examination scheduling.
5. Schedule the examination. Once eligible, the candidate works with the third-party testing provider to arrange the examination date, time, and location.
6. Prepare for the HVACR Journeyman Limited exam. Review trade knowledge and practice navigating the approved open-book references.
7. Complete the examination and licensing requirements. Follow the Oklahoma Construction Industries Board process for obtaining and maintaining the appropriate mechanical journeyman license.

Once licensed, an Oklahoma mechanical journeyman works for an active licensed Mechanical Contractor while performing work within the scope of the journeyman classification. The license category determines the type and capacity of HVACR work the journeyman may perform.

State Requirements

Applicants for an Oklahoma mechanical journeyman license must be at least 18 years old and meet one of the state’s approved experience or education-and-experience pathways.

One qualification pathway is three years of verifiable experience in the mechanical trade in the category for which the applicant is applying. Oklahoma also provides alternative pathways that combine approved mechanical education with required periods of verifiable experience.

The HVACR Limited Journeyman classification authorizes qualifying work involving cooling products, systems, or equipment, including process piping, with a cooling capacity of no more than 25 tons.

The classification also includes heating equipment, including process piping, with a heat input of no more than 500,000 Btu/h per appliance. The HVACR Limited Journeyman license also includes qualifying sheet metal, natural gas piping, and refrigeration work within the scope of the classification.

Journeymen work for an active licensed Mechanical Contractor and must perform work within the limits of their license category. Candidates preparing for the examination should understand both the technical subjects being tested and the scope of work associated with the HVACR Limited Journeyman license.

Reference Books

The following five highlighted and tabbed books are included as rentals with this Oklahoma HVACR Journeyman Limited Contractor package:

• Included Rental Book: International Mechanical Code, 2018
  Covers mechanical systems, ventilation, equipment, duct systems, exhaust systems, refrigeration, combustion air, chimneys, vents, and related installation requirements. Candidates can use this reference to practice locating code requirements and technical tables efficiently.
• Included Rental Book: International Fuel Gas Code, 2018
  Covers fuel gas piping systems, valves, connectors, materials, sizing, installation, testing, combustion air, appliances, and venting. It supports preparation for natural gas and heating-related code questions.
• Included Rental Book: Modern Refrigeration and Air Conditioning, 22nd Edition
  Provides extensive HVACR technical material covering refrigeration principles, refrigerants, air conditioning, heating, electrical fundamentals, motors, controls, components, piping, installation, system operation, maintenance, servicing, and troubleshooting. PSI permits the 22nd Edition beginning August 13, 2026.
• Included Rental Book: Mathematics for Plumbers and Pipefitters, 8th Edition
  Provides trade-focused mathematical instruction involving measurements, formulas, conversions, area, volume, piping calculations, and practical mathematics used in mechanical work.
• Included Rental Book: Code of Federal Regulations - 29 CFR Part 1926 (OSHA)
  Contains federal construction-industry safety standards covering topics such as personal protective equipment, fall protection, ladders, scaffolds, workplace hazards, employee protection, and other jobsite safety requirements.

Each reference supports a different part of HVACR preparation. Mechanical and fuel gas codes help candidates study installation requirements. Modern Refrigeration and Air Conditioning supports broader technical understanding. Mathematics for Plumbers and Pipefitters reinforces calculation skills, while OSHA regulations provide source material for safety preparation.

Exam Room Approved Books

The five references included in this package are listed among the approved materials for the Oklahoma HVACR Journeyman Limited examination under the applicable PSI reference rules: 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 (OSHA).

For code questions, PSI bases the examination on the listed code editions. The 2018 International Mechanical Code and 2018 International Fuel Gas Code are therefore important references for code-focused preparation.

Modern Refrigeration and Air Conditioning, 22nd Edition is approved beginning August 13, 2026. The physical-condition rules for examination references permit highlighting, underlining, indexing, and permanent tabs but do not permit written notes or temporary tabs.

Candidates are responsible for bringing their approved references to the examination center. Becoming familiar with the books during the rental period can help make those references more useful when working through an open-book examination.

Test Information and Study Materials

A productive study plan should combine HVACR technical review with reference-navigation practice. The exam contains 60 questions and provides 180 minutes, so candidates should develop a balance between answering from trade knowledge and researching information when a code section, technical detail, or calculation needs confirmation.

Start by organizing study sessions around the six primary examination areas. For Electrical Knowledge and Controls, review motors, circuits, general electrical principles, and controls used in HVACR equipment. For Natural Gas, study piping, sizing, materials, connections, supports, testing, and installation.

Air Distribution Systems deserves focused attention on duct sizing and design, installation, duct materials, insulation, exhaust systems, ventilation, testing and balancing, and plans and symbols. Use the International Mechanical Code alongside technical study to strengthen both subject understanding and code-navigation skills.

For Refrigeration and Air Conditioning Systems, review refrigeration theory, refrigerants, equipment and components, piping, equipment sizing, installation, system operation, troubleshooting, and maintenance. Use Modern Refrigeration and Air Conditioning during study so you learn where major topics are located.

Heating preparation should include heating theory, combustion air, vents and chimneys, equipment sizing, heating equipment, installation, hydronic systems, system operation, troubleshooting, and maintenance. Fuel gas and mechanical code references may both be useful when working through heating-related subjects.

Safety preparation should include hands-on navigation of 29 CFR Part 1926. Practice locating rules for fall protection, ladders, scaffolds, personal protective equipment, safety training, hazardous materials, and other jobsite requirements.

Trade mathematics should also be incorporated into regular preparation. Practice calculations instead of simply reviewing formulas. Become comfortable identifying the information provided in a problem, determining what must be calculated, selecting the appropriate formula, and checking the result.

A useful open-book exercise is to work with mixed practice questions. Start with a mechanical code question, move to fuel gas, then refrigeration, electrical controls, mathematics, and OSHA safety. Before opening a reference, identify which book should contain the information. This creates a more deliberate navigation process.

Highlighted sections and tabs can make finding material easier, but they work best when candidates have already practiced with the books. Use the rental period to learn the structure of each reference rather than relying solely on tabs during the examination.

How 1 Exam Prep Helps You Reach Your Goal

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

The highlighted and tabbed rental books provide an organized collection of references for studying mechanical code requirements, fuel gas systems, refrigeration and air conditioning, heating, electrical concepts, mathematics, and construction safety.

Using the references throughout preparation can help candidates become familiar with chapters, tables, indexes, definitions, formulas, and technical sections. The more familiar the materials become, the easier it can be to identify which source should be used when a practice question requires research.

Trade-focused review can also help reveal areas that deserve additional study. A candidate with years of refrigeration experience may still need extra practice with electrical controls, trade mathematics, natural gas requirements, or OSHA regulations. Another candidate may understand equipment installation but need more experience locating code provisions quickly.

1 Exam Prep encourages candidates to combine practical HVACR knowledge with structured reference practice. The goal is to help you approach the Oklahoma HVACR Journeyman Limited exam with a clear study plan, stronger familiarity with the materials, and greater confidence built through preparation rather than relying on last-minute memorization.

FAQ Section

What books are included in the Oklahoma HVACR Journeyman Limited Contractor Book Rental 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 all of the rental books highlighted and tabbed?

Yes. The rental books are highlighted and tabbed to support organized study and faster reference navigation.

How much is the Oklahoma HVACR Journeyman Limited book rental package?

The rental cost is $870. An additional $450 refundable deposit is required, bringing the total to $1,320.

Is the $450 deposit refundable?

Yes. The $450 deposit is refundable if the books are returned in similar condition within 6 months from the time they are received.

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

The examination contains 60 questions. Candidates are allowed 180 minutes to complete the test.

What score is required to pass the exam?

The passing score is 70 percent, which corresponds to 42 correct answers on the 60-question examination.

Is the Oklahoma HVACR Journeyman Limited exam open book?

Yes. The examination is open book, and approved reference materials may be used according to PSI testing rules.

Can the exam books be highlighted and tabbed?

Yes. Approved references may be highlighted, underlined, and indexed before the examination. Permanent tabs are permitted, while temporary tabs such as Post-it notes are not allowed.

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

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

What does the Oklahoma HVACR Limited Journeyman license cover?

The classification covers qualifying cooling systems and equipment up to 25 tons and heating equipment up to 500,000 Btu/h per appliance. It also includes qualifying sheet metal, natural gas piping, and refrigeration work within the license scope.

How long should I allow for my book rental package order?

Please allow up to 15 business days for book and course rental package orders.

How should I study with the rental books?

Use the books throughout your technical review and practice sessions. Learn which reference applies to each subject and practice finding code sections, technical information, formulas, calculations, and safety requirements efficiently.