International Code Council M2 : Commercial Mechanical Inspector

M2 real exams

Exam Code: M2

Exam Name: Commercial Mechanical Inspector

Updated: Sep 08, 2026

Q & A: 52 Questions and Answers

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International Code Council M2 Exam Syllabus Topics:

SectionObjectives
Mechanical Appliances and Equipment- Boilers, furnaces, and water heaters
  • 1. Safety controls and venting
    • 2. Installation and inspection requirements
      Ventilation and Indoor Air Quality- Ventilation requirements
      • 1. Exhaust systems
        • 2. Outdoor air intake requirements
          Mechanical Code (IMC) Fundamentals- International Mechanical Code application
          • 1. Scope and definitions
            • 2. General regulations
              Fuel Gas Systems- Gas piping and appliance installation
              • 1. Gas safety and testing
                • 2. Combustion air requirements
                  HVAC Systems and Equipment- Heating and cooling systems
                  • 1. Air handling units and system components
                    • 2. Duct systems design and installation
                      General Administration and Mechanical Inspection Practice- Code enforcement procedures and inspector responsibilities
                      • 1. Permit requirements and inspections
                        • 2. Documentation and reporting

                          International Code Council Commercial Mechanical Inspector Sample Questions:

                          Question 1

                          Where located on a roof with a 5:12 slope, a level platform shall be provided along the access panel of the furnace at least _____ inches wide.

                          A. [option text not fully visible in the material you sent]
                          B. 36
                          C. 30
                          D. 24


                          Question 2

                          Why are two or more sets of construction documents, engineering calculations, diagrams, and other data required to be submitted with each application for a permit?

                          A. To ensure that the project is completed in a timely manner.
                          B. All sets of documents are to be kept by the code official, and at least one set will serve as a backup set of documents in case the other is lost or misplaced.
                          C. One set will be retained by the code official, and the other will be returned to the applicant and kept on the job site for reference while construction is in progress.
                          D. All sets are to be retained by the code official in order to have a spare set of construction documents for use by any subcontractors.


                          Question 3

                          The optional integral clearance reduction system is designed to meet which NFPA standard?

                          A. 72
                          B. 96
                          C. 92A
                          D. 33


                          Question 4

                          The minimum dimension for rectangular air ducts used to supply combustion air for natural draft systems is
                          _____ inches.

                          A. 2
                          B. 4
                          C. 3
                          D. 6


                          Question 5

                          Given: Fabricated of type 430 stainless steel.


                          Optional type _____ stainless steel is available.

                          A. 316
                          B. 304
                          C. 303
                          D. 301


                          Solutions:

                          Question 1
                          Answer: C
                          Question 2
                          Answer: C
                          Question 3
                          Answer: B
                          Question 4
                          Answer: C
                          Question 5
                          Answer: B

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