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PSI Mississippi Mechanical Contractor Certification Package


The test consists of 100 questions and you have 4 hours to complete it. The minimum passing score is a 70%.


The reference material listed below was used to prepare the questions for this examination. The examination may also contain questions based on trade knowledge or general industry practices. Except for Code books, you can base your answers on later editions of references as they become available. For Code questions, the examinations will be based only on the edition of the Code book that is listed.

Candidates may use a silent, nonprinting, non-programmable calculator in the examination center.

This examination is OPEN BOOK.

The following reference materials are allowed in the examination center:

Modern Refrigeration and Air Conditioning, Althouse, Turnquist, Bracciano, 19th or 20th edition

Code of Federal Regulations - 29 CFR Part 1926 (OSHA)

International Fuel Gas Code, 2018

HVAC Duct Construction Standards, Metal and Flexible, 4th Edition 2020

Manual N - Load Calculation for Small Commercial Buildings, Fifth Edition, 2008

International Mechanical Code, 2018

International Plumbing Code, 2018

NFPA 58: Liquefied Petroleum Gas Code 2011 Edition, 2001

NFPA 13: Installation of Sprinkler Systems, 2002

ACCA Ductulator, Air Conditioning Contractors of America

Manual D, 2009, 3rd Ed

Pipefitters Handbook - 3rd Edition, 1967

Candidates are responsible for bringing their own references to the examination center. Reference materials may be highlighted, underlined, and/or indexed prior to the examination session. However, references may not be written in. Any candidate caught writing in the references during the examination will have the references confiscated and will be reported to the department. Furthermore, candidates are not permitted to bring in any additional papers (loose or attached) with their approved references. Any additional materials will be removed from the references and confiscated. References may be tabbed/indexed with permanent tabs only. Temporary tabs, such as Post-It notes, are not allowed and must be removed from the reference before the exam will begin.

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