Oklahoma HVACR Limited Contractor Exam Book Package

Prepare for the Oklahoma HVACR Limited Contractor exam with a focused collection of HVACR reference books and calculation tools designed around the technical subjects covered in the contractor examination. This Oklahoma HVACR Limited Contractor Exam Book Package brings together mechanical code, fuel gas code, refrigeration and air conditioning, residential load calculations, trade mathematics, OSHA construction safety, and duct-sizing resources in one convenient package.

The included materials are useful for candidates studying refrigeration and air conditioning systems, heating systems, natural gas piping, air distribution, electrical controls, equipment sizing, mechanical installations, workplace safety, and practical HVACR calculations. Working directly with the references while studying can help you become more familiar with how technical information is organized and where to locate important requirements when preparing for an open-book examination.

The package includes a Ductulator, the 2018 International Mechanical Code, the 2018 International Fuel Gas Code, Modern Refrigeration and Air Conditioning, 22nd Edition, Manual J - Residential Load Calcs, Eighth Full Edition, Mathematics for Plumbers and Pipefitters, 8th Edition, and the Code of Federal Regulations - 29 CFR Part 1926 for OSHA construction safety.

Exam Details

The Oklahoma HVACR Contractor, Limited examination evaluates a candidate’s knowledge of installing, maintaining, repairing, fabricating, altering, and extending air conditioning, refrigeration, heating, and ventilation systems within the scope of the limited contractor classification.

• Exam: Oklahoma HVACR Contractor, Limited
• Testing Provider: PSI
• Number of Questions: 80
• Time Allowed: 210 minutes
• Passing Score: 70%
• Passing Raw Score: 56 correct answers
• Exam Format: Open book

The technical examination covers several major HVACR knowledge areas. Electrical Knowledge and Controls includes general electrical theory, motors, AC and DC circuits, and controls. Natural Gas includes valves, connectors, accessories, hangers and supports, sizing, materials, and testing.

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 refrigeration theory, refrigerants, equipment sizing and design, equipment and components, piping, installation, system operation, troubleshooting, and maintenance. Heating Systems addresses heating theory, combustion air, vents and chimneys, equipment sizing, equipment installation, operation, troubleshooting, maintenance, and related heating concepts. Safety is also included in the technical examination.

Because the exam combines technical knowledge with code research and practical calculations, candidates benefit from studying the subjects as an integrated system. Understanding how air distribution, equipment sizing, fuel gas requirements, refrigeration principles, heating systems, and safety rules connect can make preparation more effective than memorizing isolated facts.

Open Book Test

The Oklahoma HVACR Contractor, Limited examination is an open book test. Approved reference materials may be taken into the examination center under PSI testing rules.

PSI allows approved references to be highlighted, underlined, and indexed before the examination. Permanent tabs are permitted, while temporary tabs such as Post-it notes are not allowed. References cannot contain written notes, and candidates may not write in their references during the examination session.

The testing rules also allow a silent, non-printing, non-programmable calculator. This can be useful for HVACR questions involving mathematics, sizing, and other calculations.

An open-book format does not eliminate the need to study. Candidates should know which reference applies to each type of question and practice finding information efficiently. Looking through several books for every answer can consume valuable exam time.

For example, mechanical-system questions may point toward the International Mechanical Code, while natural gas installation or sizing questions may require the International Fuel Gas Code. Residential load calculations may involve Manual J, air-distribution calculations may involve the Ductulator, and construction-safety questions may require 29 CFR Part 1926.

During preparation, practice identifying the subject before opening a reference. Then locate the appropriate chapter, section, table, formula, or index entry. Repeating this process can help build stronger reference-navigation habits for the open-book exam.

Licensing Steps

Oklahoma mechanical contractor licensing is administered by the Oklahoma Construction Industries Board. The general contractor licensing path includes meeting the required mechanical experience qualifications, submitting the appropriate application, receiving examination eligibility, completing the required examination process, and satisfying the requirements for an active contractor license.

1. Gain qualifying mechanical experience. Develop the verifiable trade experience required for Oklahoma mechanical licensing.
2. Meet contractor-level experience requirements. Contractor applicants must satisfy the applicable journeyman qualifications and obtain the additional mechanical trade experience required for contractor licensing.
3. Submit the mechanical contractor application. Apply through the Oklahoma Construction Industries Board for the appropriate contractor classification.
4. Receive examination eligibility. The Construction Industries Board reviews the application and determines eligibility to test.
5. Schedule the contractor examination. Approved applicants schedule their examination through PSI.
6. Complete the required contractor examinations. Successfully complete the applicable technical and contractor licensing examination requirements.
7. Complete active contractor requirements. Provide the required documentation for active contractor status after satisfying the examination requirements.

Preparing before scheduling the examination can give candidates more time to become comfortable with the books. Open-book preparation is most effective when candidates have already practiced locating information rather than encountering the references for the first time during the test.

State Requirements

The Oklahoma HVACR Limited Contractor classification covers qualifying cooling products, systems, and equipment, including related process piping, with a cooling capacity of no more than 25 tons.

The classification also covers heating equipment, including process piping, with a heat input of no more than 500,000 Btu/h per appliance. Within the authorized classification, HVACR Limited licensing also includes refrigeration, sheet metal, natural gas piping, and related process piping.

Applicants seeking mechanical contractor licensing must meet Oklahoma’s applicable contractor qualifications. Contractor applicants must satisfy the requirements applicable to a journeyman and obtain an additional year of experience in the mechanical trade.

A mechanical contractor must also be a permanent employee, owner, partner, or officer of the mechanical firm. Candidates should approach licensing as more than an examination process because meeting experience, application, and active-license requirements is also part of becoming an Oklahoma mechanical contractor.

Reference Books

This Oklahoma HVACR Limited Contractor Exam Book Package includes references that support several of the major knowledge areas encountered during technical exam preparation.

• Ductulator
  A duct-sizing tool used for air-distribution calculations. It can help candidates practice relationships involving airflow, duct dimensions, velocity, and friction during HVAC system design and air-distribution study.
• International Mechanical Code, 2018
  Covers mechanical installations and requirements involving HVAC equipment, ventilation, ducts, exhaust systems, combustion air, refrigeration systems, chimneys, vents, and other mechanical-system topics. Code-based preparation should include practice navigating chapters, definitions, tables, and specific requirements efficiently.
• International Fuel Gas Code, 2018
  Covers fuel gas piping systems, sizing, materials, installation, connectors, appliances, combustion air, venting, testing, and related requirements. It is particularly useful when preparing for the Natural Gas portion of the HVACR Limited Contractor exam.
• Modern Refrigeration and Air Conditioning, 22nd Edition
  A comprehensive HVACR technical reference covering refrigeration fundamentals, air conditioning, heating, electrical principles, controls, system components, installation, service, maintenance, and troubleshooting. It supports broad technical review across several exam content areas.
• Manual J - Residential Load Calcs, reprinted 2016, Eighth Full Edition
  Provides residential heating and cooling load-calculation methods. Studying load calculations can help candidates better understand how building characteristics, heat gain, heat loss, and system-sizing considerations affect HVAC equipment selection.
• Mathematics for Plumbers and Pipefitters, 8th Edition
  A trade mathematics reference covering practical calculations relevant to piping and mechanical work. Topics can support preparation involving measurements, formulas, conversions, area, volume, and other calculation-based trade applications.
• Code of Federal Regulations - 29 CFR Part 1926 (OSHA)
  Contains federal construction-industry safety standards. It supports preparation for safety subjects involving personal protective equipment, ladders, scaffolds, fall protection, hazardous conditions, employee protection, and other construction workplace requirements.

Working directly with these references can help candidates connect technical concepts to source material. When studying a topic such as natural gas sizing, duct design, refrigeration operation, or construction safety, practice locating the applicable information in the reference rather than relying only on notes or memorization.

Test Information and Study Materials

A productive study plan for the Oklahoma HVACR Limited Contractor exam should combine technical review, code navigation, calculations, and practice using the reference materials.

Begin by dividing your preparation into major knowledge areas. Refrigeration and air conditioning study should include system theory, refrigerants, components, piping, installation, operation, maintenance, troubleshooting, and equipment sizing. Heating preparation should cover equipment, combustion air, venting, system operation, installation, and related heating principles.

Natural gas preparation should include piping, valves, connectors, materials, supports, sizing, and testing. Air-distribution study should address duct sizing and design, materials, installation, insulation, ventilation, exhaust systems, testing and balancing, and plan interpretation.

Electrical preparation should reinforce basic electrical theory, motors, AC and DC circuits, and controls as they relate to HVACR systems. Safety preparation should include construction workplace requirements and the ability to locate relevant OSHA provisions in 29 CFR Part 1926.

Use Manual J and the Ductulator during practice instead of treating them as materials to review only at the end. Calculation tools become more useful when candidates understand how and when to apply them.

Reference-navigation drills can also improve study efficiency. Pick a subject such as combustion air, duct sizing, fuel gas testing, refrigeration components, or fall protection. Identify which book should contain the information, then locate the relevant section. Repeat the exercise across different topics until selecting and navigating the correct reference becomes more familiar.

Timed practice can help develop a realistic testing pace. With 80 questions and 210 minutes, candidates need to balance questions that can be answered from technical knowledge with questions that require code research or calculations. Learning when to perform a quick reference check and when a deeper lookup is required can help create a more organized exam strategy.

How 1 Exam Prep Helps You Reach Your Goal

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

Contractor exam preparation can involve several different types of knowledge at once. A candidate may need to understand refrigeration theory, navigate a mechanical code, complete a calculation, interpret a fuel gas requirement, or find an OSHA safety rule. An organized preparation plan helps bring those areas together.

1 Exam Prep encourages candidates to use the books actively throughout their preparation. Instead of simply owning the references, work with them during practice questions, calculations, code review, and technical study. Repeated use can help develop familiarity with chapters, indexes, tables, formulas, definitions, and important technical concepts.

Trade-focused preparation also helps candidates identify areas that deserve more attention. Someone with strong field experience in equipment installation may need additional review in mathematics, code navigation, load calculations, electrical controls, or safety regulations. Organizing study around the exam subjects can make those gaps easier to identify.

The goal is to help candidates approach the Oklahoma HVACR Limited Contractor exam with a structured study routine, stronger familiarity with the reference materials, and practical preparation built around the actual skills needed for an open-book technical examination.

FAQ Section

What is included in the Oklahoma HVACR Limited Contractor Exam Book Package?

The package includes a Ductulator, International Mechanical Code 2018, International Fuel Gas Code 2018, Modern Refrigeration and Air Conditioning 22nd Edition, Manual J Eighth Full Edition, Mathematics for Plumbers and Pipefitters 8th Edition, and 29 CFR Part 1926 OSHA.

Is the Oklahoma HVACR Limited Contractor exam open book?

Yes. The Oklahoma HVACR Contractor, Limited examination is open book. Approved references may be used according to PSI examination-center rules.

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

The HVACR Contractor, Limited examination contains 80 questions. Candidates receive 210 minutes to complete the exam.

What score is required to pass?

The passing requirement is 70 percent, which corresponds to 56 correct answers on the 80-question examination.

What subjects are covered on the exam?

The technical exam covers Electrical Knowledge and Controls, Natural Gas, Air Distribution Systems, Refrigeration and Air Conditioning Systems, Heating Systems, and Safety.

What does the Oklahoma HVACR Limited Contractor license cover?

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

Why is a Ductulator included?

A Ductulator is useful for studying air-distribution and duct-sizing calculations. It can help candidates practice relationships involving airflow, duct dimensions, velocity, and friction.

Why is Manual J included?

Manual J is used for residential heating and cooling load calculations. It supports preparation involving equipment sizing and the relationship between building load characteristics and HVAC system requirements.

Can I highlight and tab exam references?

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 use the books while studying?

Use the references alongside practice questions and technical review. Learn which book applies to each subject and repeatedly practice locating code sections, tables, formulas, calculations, and technical information.