Mississippi Mechanical Contractor Exam Prep - Live Virtual + Self Study Training

Prepare for the Mississippi Mechanical Contractor examination with live virtual training and structured self-study focused on the mechanical, HVAC, refrigeration, plumbing, gas, ductwork, fire sprinkler, piping, and safety subjects covered by the state trade exam.

The Mississippi Mechanical classification is a major commercial contractor classification administered by the Mississippi State Board of Contractors. Its scope includes heating, cooling, refrigeration, associated equipment piping and ductwork, plumbing, pressure and process piping, gas piping, boilers, controls, insulation, and other mechanical systems included within the classification.

This exam-prep program combines live virtual instruction with self-study training so candidates can work through a broad technical reference library in an organized way. The live training focuses on understanding the books, identifying major exam subjects, working through technical concepts, and developing efficient open-book navigation habits.

The Mississippi Mechanical Contractor examination is administered by PSI as part of the licensing process overseen by the Mississippi State Board of Contractors. Candidates must receive testing eligibility through the Board before scheduling the examination.

The current Mississippi Mechanical Contractor trade examination contains 100 questions. Candidates receive 4 hours to complete the examination and must achieve a minimum passing score of 70%.

The examination is open book. Candidates may bring the permitted references into the examination center when those books comply with PSI testing rules. This makes reference navigation a major part of preparation because the examination covers HVAC, plumbing, refrigeration, fuel gas, fire sprinklers, ductwork, piping, hydronics, controls, load calculations, equipment, and safety.

The course is organized around references including Modern Refrigeration and Air Conditioning, 22nd Edition, the 2021 International Mechanical Code, 2021 International Plumbing Code, 2021 International Fuel Gas Code, NFPA 58, NFPA 13, ACCA load and duct references, SMACNA duct standards, the Pipefitter's Handbook, and OSHA construction regulations. The Mississippi NASCLA Business, Law and Project Management guide supports preparation for the separate Law and Business Management examination requirement.

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

Exam Details

The Mississippi Mechanical Contractor examination contains 100 questions. Candidates receive 4 hours to complete the examination and must earn at least 70% to pass.

The current examination content outline includes:

• Boilers and Hydronics: 6 questions
• Gas Systems: 10 questions
• Cleanouts: 3 questions
• Plumbing Fixtures and Equipment: 5 questions
• Water Heaters: 2 questions
• Piping, Valves, and Controls: 5 questions
• Sheet Metal and Ducts: 6 questions
• Water Supply: 5 questions
• Hangers and Supports: 4 questions
• Drain, Waste, and Vent: 5 questions
• Backflow: 2 questions
• Traps and Interceptors: 4 questions
• Developed Length: 3 questions
• Isometric Analysis: 8 questions
• Safety: 4 questions
• Joints and Connections: 3 questions
• General Plumbing Regulations: 3 questions
• Fire Sprinklers: 4 questions
• Refrigerants and Refrigeration: 4 questions
• Heating and Cooling Principles: 4 questions
• Load Calculations: 5 questions
• Testing, Adjusting and Balancing: 1 question
• HVAC Equipment: 4 questions

Gas Systems is the largest single category with 10 questions, followed by Isometric Analysis with 8 questions. Boilers and Hydronics and Sheet Metal and Ducts each contribute 6 questions, while several plumbing and mechanical subjects contribute between 2 and 5 questions each.

The broad outline reflects the scope of the Mississippi major Mechanical classification. Candidates should prepare across both HVAC and plumbing rather than approaching the exam as an air-conditioning-only test.

Open Book Test

The Mississippi Mechanical Contractor examination is an open-book test. Candidates are responsible for bringing permitted references to the testing center and following PSI rules governing their preparation and use.

References may be highlighted, underlined, and indexed before the examination. Permanent tabs are permitted. Temporary tabs such as Post-it notes are not permitted, and candidates may not bring loose papers attached to or inserted into approved references.

Candidates may not write in their references during the examination session.

Reference familiarity is especially important on the Mechanical exam because a single test can move from plumbing isometrics to fuel gas, refrigeration, fire sprinklers, duct construction, load calculations, or OSHA safety.

A question about drain, waste, and vent systems may direct you toward the 2021 International Plumbing Code. A fuel-gas question may require the 2021 International Fuel Gas Code or NFPA 58. HVAC equipment and refrigeration questions may require Modern Refrigeration and Air Conditioning.

Questions involving sprinkler systems may require NFPA 13, while duct-construction questions may lead to the HVAC Duct Construction Standards. Load and airflow questions can require Manual N, Manual D, or the ACCA Ductulator.

Live training and self-study should therefore include timed navigation practice. Identify the topic, select the most likely reference, locate the appropriate section or table, and confirm the answer efficiently.

Licensing Steps

1. Select the Mechanical classification. Confirm that the major Mechanical classification matches the work your company intends to perform.
2. Complete the Mississippi contractor application. Submit the applicable commercial contractor application to the Mississippi State Board of Contractors.
3. Identify the qualifying party. The qualifying party is the individual responsible for taking the required examination or examinations for the applicant.
4. Submit the required supporting documents. Provide the business and qualifying-party documentation required by the Board for the application.
5. Receive examination eligibility. MSBOC reviews the application and notifies PSI when the qualifying party is eligible to test.
6. Schedule the Mechanical examination. Follow PSI registration instructions after eligibility has been issued.
7. Prepare through live virtual and self-study training. Review HVAC, plumbing, refrigeration, gas, ductwork, fire sprinklers, hydronics, controls, calculations, equipment, and safety.
8. Complete the Mechanical Contractor examination. The trade examination contains 100 questions, allows 4 hours, and requires a 70% passing score.
9. Complete Mississippi Law and Business Management. Applicants must satisfy the applicable Mississippi Law and Business Management examination requirement.
10. Complete final Board review. Passing the examinations does not automatically issue a contractor license. The Board must approve the complete application and applicable supporting requirements.

State Requirements

The Mississippi State Board of Contractors regulates the major Mechanical contractor classification.

The Mechanical classification covers all aspects of heating, cooling, refrigeration, associated equipment piping and ductwork, and plumbing work.

The scope includes installation, maintenance, repair, fabrication, alteration, and extension of central air-conditioning, refrigeration, heating, and ventilating systems, including ductwork.

It also includes boiler and unfired pressure-vessel systems, lift-station equipment and piping, associated mechanical equipment, duct cleaning and equipment sanitizing when partial disassembly is required, and various piping systems.

Mechanical scope can include pipe and vessel insulation, pressure and process piping, pneumatic control piping, gasoline tank and pump installations and related piping, standpipes, air piping, vacuum lines, oxygen lines, nitrous oxide piping, chemical lines, fuel transmission lines, liquefied petroleum gas lines, and natural-gas fuel lines.

The major Mechanical classification also includes certain electrical tasks associated with mechanical equipment, such as replacing, disconnecting, or reconnecting power wiring on the load side of a dedicated existing disconnect and working with low-voltage HVAC control wiring. The classification does not include general electrical power wiring.

Incidental excavation associated with Mechanical work is included within the classification.

Holding a Mississippi major Mechanical classification allows the license holder to perform the specialty classifications assigned by MSBOC under that major classification, subject to applicable Board rules and any additional requirements that may apply.

Reference Books

• NASCLA Contractor’s Guide to Business, Law and Project Management, Mississippi 6th Edition
  Supports preparation for the Mississippi Law and Business Management examination, including licensing, contracts, financial management, project administration, estimating, labor responsibilities, risk management, and contractor business operations.
• Modern Refrigeration and Air Conditioning, Althouse, Turnquist, Bracciano, 22nd Edition
  Supports preparation involving refrigeration principles, heating and cooling, equipment, refrigerants, controls, troubleshooting concepts, airflow, system components, and HVAC operation.
• Code of Federal Regulations - 29 CFR Part 1926 (OSHA), with Latest Available Amendment
  Supports preparation involving construction safety, personal protective equipment, ladders, scaffolds, tools, electrical hazards, material handling, excavation, and mechanical-construction hazards.
• International Fuel Gas Code, 2021 Edition
  Supports preparation involving fuel-gas piping, sizing, materials, valves, equipment connections, combustion-related provisions, installation, and testing.
• HVAC Duct Construction Standards, Metal and Flexible, 2005, 3rd Edition
  Supports study involving metal and flexible duct construction, reinforcement, joints, seams, supports, hangers, fabrication, installation, and air-distribution systems.
• Manual N - Load Calculation for Small Commercial Buildings, Fifth Edition
  Supports preparation involving commercial heating and cooling load calculations, heat gain, heat loss, building characteristics, internal loads, ventilation, and equipment-sizing concepts.
• International Plumbing Code, 2021
  Supports study involving water supply, drain, waste and vent systems, fixtures, traps, interceptors, cleanouts, backflow, piping, joints, supports, and general plumbing regulations.
• International Mechanical Code, 2021
  Supports preparation involving mechanical systems, equipment installation, ductwork, ventilation, exhaust, refrigerant systems, appliances, piping, and mechanical-code requirements.
• NFPA 58 Liquefied Petroleum Gas Code, 2020 Edition
  Supports preparation involving liquefied petroleum gas systems, containers, piping, equipment, installation, storage, and safety requirements.
• NFPA 13: Installation of Sprinkler Systems, 2019
  Supports preparation involving fire sprinkler system installation, components, piping, spacing concepts, water supply, and system requirements relevant to the examination.
• Ductulator
  Supports airflow and duct-sizing calculations used in HVAC duct-system design and examination preparation.
• Manual D, 2016
  Supports preparation involving residential duct-system design, airflow, pressure losses, duct sizing, fittings, and distribution-system concepts.
• Pipefitter's Handbook
  Supports study involving pipe dimensions, fittings, valves, layout, calculations, offsets, fabrication, and practical piping information.

Test Information and Study Materials

A strong Mississippi Mechanical study plan should divide preparation between plumbing, HVAC, refrigeration, fuel gas, duct systems, hydronics, controls, and fire sprinklers.

Begin with the International Plumbing Code because a substantial portion of the examination involves plumbing concepts. Review water supply, drainage, vents, cleanouts, fixtures, traps, interceptors, backflow, developed length, joints, supports, and general regulations.

Isometric Analysis accounts for 8 questions. Candidates should become comfortable reading piping diagrams and tracing drainage, venting, water, and related piping arrangements.

Practice identifying developed lengths and following piping routes through fittings and changes of direction. Isometric questions reward careful visual interpretation rather than rushed assumptions.

Gas Systems is the largest individual category with 10 questions. Use the International Fuel Gas Code and NFPA 58 to strengthen knowledge of piping, sizing, materials, equipment, valves, LP gas, and installation requirements.

HVAC and refrigeration preparation should include the refrigeration cycle, heating and cooling principles, refrigerants, compressors, condensers, evaporators, metering devices, heat pumps, controls, and equipment operation.

Use Modern Refrigeration and Air Conditioning for trade theory and equipment knowledge and the International Mechanical Code for code-related installation requirements.

Load Calculations account for 5 questions. Use Manual N to review small-commercial heating and cooling loads. Understand how walls, roofs, windows, occupancy, ventilation, lighting, equipment, outdoor conditions, and other factors affect building loads.

Sheet Metal and Ducts accounts for 6 questions. Study duct construction, supports, joints, reinforcement, flexible duct, airflow, and installation practices using the SMACNA reference.

Use the Ductulator and Manual D to reinforce duct sizing and air-distribution concepts. Practice reading airflow relationships rather than treating the duct references as unfamiliar tools on test day.

Boilers and Hydronics contributes 6 questions. Review boilers, hydronic piping, pumps, valves, controls, heat-transfer equipment, expansion concepts, and related mechanical components.

Piping, Valves, and Controls should include identification of common piping components and their purposes. Use the Pipefitter's Handbook to strengthen practical piping navigation and calculation skills.

Fire Sprinklers account for 4 questions. Become familiar with the organization of NFPA 13 so you can locate sprinkler-related requirements efficiently during the open-book examination.

Safety contributes 4 questions. Review OSHA construction requirements involving ladders, scaffolds, personal protective equipment, excavation, power tools, material handling, electrical hazards, and mechanical installation activities.

Reference navigation should be practiced every time you work through a question set. Identify the subject first, then choose the reference. Searching every book for every answer is too slow for a 100-question examination.

As testing approaches, use mixed-topic practice that moves from plumbing to fuel gas, HVAC, refrigeration, ducts, fire sprinklers, hydronics, controls, and safety. This helps simulate the broad subject changes candidates encounter on the actual Mechanical Contractor examination.

How 1 Exam Prep Helps You Reach Your Goal

1 Exam Prep supports Mississippi Mechanical Contractor candidates through organized live virtual instruction, structured self-study, trade-focused review, reference navigation, practice-oriented preparation, and confidence-building study structure.

The training is organized around the mechanical, plumbing, HVAC, refrigeration, gas, duct, fire sprinkler, and safety references associated with the Mississippi Mechanical Contractor examination.

Because the examination is open book, preparation emphasizes knowing which reference to use and where to look. Candidates can practice working with code indexes, technical tables, diagrams, duct-sizing tools, handbooks, and installation standards rather than relying on random page-by-page searching.

Live virtual instruction provides a structured environment for reviewing major exam subjects, while self-study gives candidates additional opportunities to revisit difficult concepts and continue practicing reference navigation independently.

The goal is to help candidates approach the Mississippi Mechanical Contractor examination with stronger mechanical and plumbing knowledge, better code-navigation skills, improved calculation ability, and a more organized preparation process without guaranteeing a passing score or contractor license.

How many questions are on the Mississippi Mechanical Contractor exam?

The Mississippi Mechanical Contractor trade examination contains 100 questions.

How much time is allowed for the Mississippi Mechanical exam?

Candidates receive 4 hours to complete the examination.

What score is required to pass the Mechanical Contractor examination?

The minimum passing score is 70%.

Is the Mississippi Mechanical Contractor exam open book?

Yes. The examination is open book, subject to PSI requirements governing permitted references and testing-room materials.

Does the exam cover both HVAC and plumbing?

Yes. The major Mississippi Mechanical Contractor examination covers both HVAC and plumbing subjects, including refrigeration, heating and cooling, ducts, gas systems, water supply, DWV systems, fixtures, and piping.

Does the exam include plumbing isometric analysis?

Yes. Isometric Analysis accounts for 8 questions.

Does the exam cover gas systems?

Yes. Gas Systems is the largest individual category with 10 questions.

Does the Mechanical exam include load calculations?

Yes. Load Calculations accounts for 5 questions.

Does the examination include fire sprinklers?

Yes. Fire Sprinklers accounts for 4 questions.

Does this training include live virtual instruction?

Yes. This exam prep combines live virtual training with structured self-study preparation.

Where can I view the Live Class Schedule?

Click Here to View the Current Live Class Schedule.

Who administers the Mississippi Mechanical examination?

The examination is administered by PSI as part of the Mississippi State Board of Contractors licensing process.

Do I need Board approval before scheduling the exam?

Yes. Applicants must submit the applicable contractor application and receive testing eligibility before scheduling the required examination with PSI.

Do Mississippi Mechanical applicants also need Law and Business Management?

Yes. Mississippi requires applicants to satisfy the applicable Law and Business Management examination requirement in addition to the required Mechanical trade examination.

Does passing the Mechanical exam automatically issue a Mississippi contractor license?

No. Passing the examination is one part of the licensing process. The Mississippi State Board of Contractors must also approve the contractor application and applicable supporting requirements.

Does this training guarantee that I will pass the Mississippi Mechanical Contractor exam?

No. This training is designed to support organized preparation. Examination performance depends on each candidate's study, mechanical experience, plumbing knowledge, reference-navigation skills, calculation ability, and performance on test day.