OKLAHOMA PSI HVACR CONTRACTOR LIMITED

Reference Books
The following reference materials are allowed in the examination center:

• ACCA Ductulator (Duct Slide Rule), 
• International Mechanical Code, 2018 edition, with Oklahoma Revisions
• International Fuel Gas Code, 2018 edition, with Oklahoma Revisions 
• Modern Refrigeration and Air Conditioning,  20th or 21st edition,  (Starting 12/14/2022 the 21st edition can be used. OR Refrigeration & Air Conditioning Technology, Fifth Edition,
• Manual J - Residential Load Calcs, reprinted 2006, Eighth Full Edition
• Mathematics for Plumbers and Pipefitters, Lee Smith, 8th Edition,
• Code of Federal Regulations - 29 CFR Part 1926 (OSHA), with latest available amendments

Additional books that are neither used in the development of the exam nor contain answers to all the related subject questions, but are allowed in the test area under the same physical conditions as the other books:

•  NCCER Heating, Ventilating, and Air Conditioning Book 1, Book 2, Book 3. and Book 4.