Oklahoma HVACR Journeyman Unlimited Exam Prep - Live Virtual + Self Study Training

Prepare for the Oklahoma HVAC/R Unlimited Journeyman examination with a flexible combination of Live Virtual instruction and Self Study training. This exam prep program is designed for HVAC/R professionals pursuing the Oklahoma HVAC/R Unlimited Journeyman license through the Oklahoma Construction Industries Board and who want structured technical review, instructor-led training, independent study, and practical reference-navigation practice.

The Oklahoma HVAC/R Unlimited Journeyman classification covers qualifying installation, alteration, modification, service, maintenance, and repair of cooling systems and equipment, heating equipment, process piping, sheet metal, natural gas piping, and refrigeration. Unlike the HVAC/R Limited classification, the Unlimited classification is not restricted by the 25-ton cooling or 500,000 Btu/h-per-appliance heating limits.

The current HVACR Journeyman Unlimited examination contains 70 scored questions, allows 180 minutes, and requires a 70% passing score, equal to 49 correct answers. The exam is open book and tests electrical knowledge and controls, natural gas, air distribution systems, refrigeration and air conditioning systems, heating systems, and safety.

This Live Virtual + Self Study program uses a comprehensive group of technical references and study tools. The materials identified for preparation include the Ductulator, International Mechanical Code, 2018, International Fuel Gas Code, 2018, Modern Refrigeration and Air Conditioning, 22nd Edition, Manual N - Commercial Load Calculation for Small Commercial Buildings, 5th Edition, Mathematics for Plumbers and Pipefitters, 8th Edition, and Code of Federal Regulations - 29 CFR Part 1926 (OSHA).

Live Virtual training gives candidates scheduled opportunities to review important HVAC/R subjects, while Self Study allows additional time for code navigation, duct sizing, commercial load-calculation practice, refrigeration concepts, mathematics, safety, and other technical material between live sessions.

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. The scope includes ductwork within complete systems that are unlimited in horsepower or tons, along with related piping, vessels, ducts, insulation, and associated HVAC/R components while employed by an HVAC/R contractor.

The current examination contains 70 scored questions. Candidates receive 180 minutes, or three hours, to complete the test. A passing score of 70% is required, which equals 49 correct answers.

The examination is divided into six major technical categories:

• Electrical Knowledge and Controls – 15 questions: General electrical theory and knowledge, motors, DC circuits, AC circuits, and controls.
• Natural Gas – 10 questions: Piping valves, connectors, accessories, hangers and supports, sizing, materials, testing, installation, and assembly.
• Air Distribution Systems – 16 questions: Duct definitions, sizing and design, duct 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 – 16 questions: Refrigeration theory, refrigerants, equipment sizing and design, equipment and components, piping, installation, system operation, troubleshooting, and maintenance.
• Heating Systems – 10 questions: Heating theory and system types, combustion air, vents and chimneys, equipment sizing, heating equipment, installation, troubleshooting, maintenance, hydronics, and hydronic piping.
• Safety – 3 questions: Personal protective equipment, safety training, ventilation, first aid, hazardous materials, fall protection, lockout/tagout, ladders, scaffolds, and related safety responsibilities.

Air Distribution Systems and Refrigeration and Air Conditioning Systems are the two largest categories, with 16 questions each. Electrical Knowledge and Controls follows closely with 15 questions. Together, these three categories account for most of the scored examination, making them important priorities in a structured study plan.

Open Book Test

The Oklahoma HVACR Journeyman Unlimited examination is an open-book test. Candidates are responsible for bringing their approved examination references to the testing center and should practice using those books before the examination.

The current official exam-room reference list for HVACR Journeyman Unlimited includes the International Mechanical Code, 2018 with Oklahoma revisions, International Fuel Gas Code, 2018 with Oklahoma revisions, Modern Refrigeration and Air Conditioning, Mathematics for Plumbers and Pipefitters, and OSHA 29 CFR Part 1926.

The Ductulator and Manual N - Commercial Load Calculation for Small Commercial Buildings, 5th Edition are included in the study-material list for this training program to support duct-sizing, airflow, commercial load-calculation, and equipment-sizing preparation. They are not listed as approved exam-room references for the current HVACR Journeyman Unlimited examination.

For code questions, candidates should use the specific code editions identified in the examination reference list. The current examination is based on the 2018 International Mechanical Code and 2018 International Fuel Gas Code for applicable code questions.

Later editions of approved non-code references are permitted under current testing rules. The 22nd Edition of Modern Refrigeration and Air Conditioning can therefore be used as a later edition of the approved non-code refrigeration reference.

Approved exam-room references may be highlighted, underlined, and indexed before testing. Permanent tabs are permitted. Temporary removable tabs such as Post-it notes are not allowed.

References may not contain written notes before or during the examination. Candidates are not permitted to bring additional loose papers with their approved references. Downloaded reference material must meet the testing provider’s binding requirements.

Candidates may also use a silent, non-printing, non-programmable calculator that meets current PSI testing rules.

Licensing Steps

1. Gain qualifying HVAC/R experience. Build verifiable mechanical trade experience in the HVAC/R Unlimited category.
2. Maintain apprentice registration when required. Oklahoma mechanical experience generally must be properly documented through apprentice registration unless lawfully obtained under an applicable exemption.
3. Meet the minimum age requirement. Mechanical journeyman applicants must be at least 18 years old.
4. Meet the experience or approved education pathway. Oklahoma provides multiple qualification paths based on mechanical trade experience and approved mechanical education.
5. Document qualifying experience. Maintain records showing qualifying employment, apprentice registration, education, military experience when applicable, and other information needed for the license application.
6. Apply through the Oklahoma Construction Industries Board. Submit the Mechanical License Application for the HVAC/R Unlimited Journeyman classification.
7. Receive examination eligibility. The Oklahoma Construction Industries Board determines whether the applicant qualifies to sit for the exam.
8. Schedule through PSI. Approved candidates schedule the Oklahoma mechanical examination with PSI.
9. Prepare for all six technical categories. Review electrical controls, natural gas, air distribution, refrigeration and air conditioning, heating, and safety.
10. Practice open-book reference navigation. Become familiar with the approved code books and technical references before test day.
11. Complete the examination. The current HVACR Journeyman Unlimited exam requires a 70% passing score.
12. Work within Oklahoma’s contractor structure after licensing. A journeyman performs authorized mechanical work while employed by the appropriate licensed contractor.

State Requirements

The Oklahoma Construction Industries Board regulates mechanical licensing, including the HVAC/R Unlimited Journeyman classification.

An applicant for an Oklahoma mechanical journeyman license must be at least 18 years of age. The standard licensing pathway requires three years of verifiable mechanical trade experience in the category for which the applicant is applying.

Oklahoma also recognizes approved education combined with field experience. For example, qualifying approved mechanical programs may reduce the amount of field experience required depending on the number of instructional hours completed.

For mechanical licensing purposes, one year of qualifying experience is generally defined as 2,000 hours of verifiable mechanical work.

Oklahoma experience intended to count toward licensing generally must be supported by proper apprentice registration unless the work was lawfully performed under an applicable exemption. Maintaining accurate experience records is important throughout the apprentice and licensing process.

The HVAC/R Unlimited Journeyman classification authorizes qualifying work involving cooling products, systems, and equipment including process piping; heating equipment including process piping; sheet metal; natural gas piping; and refrigeration.

The Unlimited classification differs from HVAC/R Limited licensing because it is not restricted to cooling equipment of 25 tons or less or heating equipment with a heat input of 500,000 Btu/h or less per appliance.

Reference Books

• Ductulator
  A practical study tool for duct sizing, airflow relationships, friction-rate calculations, and air-distribution preparation. It is useful for strengthening duct-design skills even though it is not currently listed as an approved exam-room reference for the HVACR Journeyman Unlimited examination.
• International Mechanical Code, 2018
  A primary approved examination reference covering mechanical equipment, ventilation, duct systems, refrigeration, heating, hydronics, exhaust systems, combustion air, and other mechanical-code requirements.
• International Fuel Gas Code, 2018
  An approved exam reference supporting natural gas preparation involving piping, sizing, valves, connectors, supports, materials, testing, combustion air, venting, and fuel-gas installation requirements.
• Modern Refrigeration and Air Conditioning, 22nd Edition
  A comprehensive HVAC/R reference supporting refrigeration theory, refrigerants, electrical systems, motors, controls, heating, air conditioning, installation, system operation, troubleshooting, maintenance, and service.
• Manual N - Commercial Load Calculation for Small Commercial Buildings, 5th Edition
  A study reference for commercial heating and cooling load calculations, building-load analysis, and equipment-sizing concepts. It supports preparation but is not currently listed as an approved exam-room reference for the HVACR Journeyman Unlimited examination.
• Mathematics for Plumbers and Pipefitters, 8th Edition
  An approved technical reference supporting measurements, piping mathematics, dimensions, offsets, formulas, and other calculations useful in mechanical trade work.
• Code of Federal Regulations - 29 CFR Part 1926 (OSHA)
  An approved safety reference supporting preparation involving PPE, fall protection, ladders, scaffolds, ventilation, hazardous materials, lockout/tagout, safety training, and construction-industry safety requirements.

Test Information and Study Materials

A successful study strategy should combine technical knowledge with efficient reference navigation. An open-book exam still requires candidates to recognize what a question is asking, determine which reference is most likely to contain the answer, and locate the information within the available time.

Prioritize Air Distribution Systems. This category contains 16 questions. Study duct sizing and design, installation, materials, insulation, supports, ventilation, hoods, exhaust, testing and balancing, plans, and symbols. The Ductulator can be valuable for reinforcing airflow and duct-sizing concepts during preparation.

Give equal attention to Refrigeration and Air Conditioning Systems. This category also contains 16 questions. Review refrigeration theory, refrigerants, equipment sizing, components, piping, installation, operation, troubleshooting, and maintenance.

Strengthen Electrical Knowledge and Controls. The exam contains 15 questions in this category. Review motors, AC and DC circuits, electrical theory, control components, and how electrical systems interact with HVAC/R equipment.

Practice Natural Gas code navigation. Use the International Fuel Gas Code to find requirements involving pipe sizing, materials, supports, valves, connectors, testing, and installation.

Review Heating Systems. Study combustion air, vents and chimneys, heating equipment, equipment sizing, hydronic systems, installation, operation, troubleshooting, and maintenance.

Use Manual N for additional sizing practice. Commercial load-calculation study can strengthen understanding of equipment sizing and system-design concepts even though Manual N is not currently listed as an approved exam-room reference for this journeyman examination.

Practice under timed conditions. With 70 scored questions in 180 minutes, candidates have an average of approximately two and a half minutes per scored question. Strong pacing and efficient reference searches are important.

Live Class Schedule

The live training schedule is organized around the books and technical references used on the exam. Click Here to View the Current Live Class Schedule

Live Virtual training provides scheduled instructor-led review of important exam subjects and reference-navigation techniques. Self Study preparation gives candidates additional time between sessions to reinforce technical material, practice calculations, work with the code books, and focus on weaker subject areas.

How 1 Exam Prep Helps You Reach Your Goal

1 Exam Prep helps Oklahoma HVAC/R Unlimited Journeyman candidates organize their preparation around the major technical categories tested on the examination.

The Live Virtual + Self Study format combines structured instructor-led review with independent preparation. Candidates can use live sessions to work through trade-focused material and then reinforce those subjects through additional self-study.

The program supports study in air distribution, refrigeration and air conditioning, electrical controls, natural gas, heating, mechanical mathematics, OSHA safety, duct sizing, commercial load calculations, and code navigation.

Reference-navigation practice is especially important for this open-book examination. 1 Exam Prep emphasizes organized study guidance, practice-oriented preparation, familiarity with approved references, and a repeatable method for approaching technical questions under timed conditions.

The goal is to help candidates build stronger trade knowledge, improve book-navigation skills, identify weak areas, and approach the Oklahoma HVACR Unlimited Journeyman examination with a more organized study structure.

FAQ Section

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

The current examination contains 70 scored questions.

How much time is allowed?

Candidates receive 180 minutes, or three hours, to complete the examination.

What score is required to pass?

The current passing requirement is 70%, equal to 49 correct answers.

Is the Oklahoma HVACR Unlimited Journeyman exam open book?

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

What are the largest exam categories?

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

Is the Ductulator an approved exam-room reference?

The Ductulator is included in this training material list for duct-sizing and airflow study, but it is not currently listed among the approved exam-room references for the HVACR Journeyman Unlimited examination.

Is Manual N allowed in the exam room?

Manual N is included as a study reference for commercial load-calculation and equipment-sizing preparation, but it is not currently listed as an approved exam-room reference for this examination.

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

Yes. Current PSI rules permit later editions of approved non-code references, and the 22nd Edition is a later edition of the listed Modern Refrigeration and Air Conditioning reference.

Can approved exam books be highlighted and tabbed?

Yes. Approved references may be highlighted, underlined, and indexed before testing. Permanent tabs are permitted, while temporary removable tabs are not allowed.

What experience is required for Oklahoma journeyman licensing?

The standard pathway requires three years of verifiable mechanical experience in the category sought. Approved combinations of mechanical education and field experience are also recognized.

What is the difference between HVACR Limited and Unlimited licensing?

The Unlimited classification does not carry the 25-ton cooling and 500,000 Btu/h-per-appliance heating restrictions that apply to the HVAC/R Limited classification.

Who determines exam eligibility?

The Oklahoma Construction Industries Board determines examination eligibility. Approved candidates then schedule the examination through PSI.

What is the difference between Live Virtual and Self Study training?

Live Virtual training provides scheduled instructor-led preparation, while Self Study allows candidates to continue reviewing technical subjects, calculations, and references independently between live sessions.

Where can I see the current live class schedule?

Visit the Live Class Schedule to view current training dates.

Does this course guarantee passing the exam or receiving a license?

No. The course provides organized technical review, live and self-study preparation, reference-navigation guidance, and practice-oriented study structure to support candidates pursuing Oklahoma HVAC/R Unlimited Journeyman licensing.