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Updated: Sep 01, 2026
No. of Questions: 52 Questions & Answers with Testing Engine
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International Code Council M2 Exam Overview:
| Certification Vendor: | International Code Council (ICC) |
|---|---|
| Exam Name: | Commercial Mechanical Inspector M2 Exam |
| Exam Number: | M2 |
| Certificate Validity Period: | 3 years |
| Real Exam Qty: | 50 |
| Exam Price: | $219 (ICC members), $249-$320 (non-members) |
| Passing Score: | 75 (scaled score) |
| Exam Format: | Multiple-choice, Open-book |
| Related Certifications: | Commercial Building Inspector Commercial Plumbing Inspector Commercial Electrical Inspector |
| Exam Duration: | 120 minutes |
| Available Languages: | English |
| Recommended Training: | ICC Code Resources ICC Official Training |
| Exam Registration: | ICC Official Registration Pearson VUE Scheduling |
| Sample Questions: | International Code Council M2 Sample Questions |
| Exam Way: | Onsite at Pearson VUE test centers; Online remote proctoring via ICC PRONTO |
| Pre Condition: | No mandatory prerequisites; recommended knowledge of International Mechanical Code (IMC) and International Fuel Gas Code (IFGC) |
| Official Syllabus URL: | https://www.iccsafe.org/certification/certification-exams/m2-commercial-mechanical-inspector/ |
International Code Council M2 Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Fuel Supply Systems | 10% | - Pressure regulation and overpressure protection - Piping testing and inspection - Fuel gas piping materials and installation - Gas appliances and connections |
| Combustion Air | 8% | - Confined spaces and equipment rooms - Air supply and venting - Combustion air requirements |
| General Administration | 18% | - Plan review and documentation - Manufacturer's instructions and listings - Code authority and enforcement - Permits and inspections |
| Exhaust & Ventilation Systems | 20% | - Commercial kitchen exhaust systems - Ventilation rates and outdoor air requirements - Hazardous and special exhaust systems - Makeup air systems |
| Chimneys & Vents | 14% | - Factory-built chimneys and vents - Clearances and termination requirements - Vent systems and connections - Chimney construction and materials |
| Duct Systems | 12% | - Insulation and sealing - Dampers and access doors - Duct construction and materials - Duct installation and supports |
| Heating, Cooling & Water Heaters | 18% | - Heat pumps and cooling equipment - Water heaters and storage tanks - HVAC equipment installation and clearance - Boilers and hydronic systems - Solar thermal systems |
International Code Council Commercial Mechanical Inspector Sample Questions:
Question 1
When testing dampers located in corridors, the dampers shall demonstrate acceptable closure performance when subjected to _____ fpm velocity across the face of the damper using the UL 555 fire exposure test.
A. 200
B. 100
C. 75
D. 150
Question 2
Supports for hazardous exhaust duct shall be constructed of:
A. material complying with UL 181.
B. noncombustible material.
C. plastic.
D. fibrous material.
Question 3
Supports for hazardous exhaust duct shall be constructed of:
A. material complying with UL 181.
B. noncombustible material.
C. plastic.
D. fibrous material.
Question 4
A cooling system with a condensate disposal system:
A. shall be made of approved corrosion-resistant material and shall not decrease in size from the drain pan connection to the place of condensate disposal.
B. shall not be less than 3/4-inch PVC pipe or equivalent approved material.
C. shall have all horizontal sections of drain piping installed with a minimum of 1/4 inch per foot slope.
D. shall be made of an approved pipe and be at least 1/2-inch in diameter.
Question 5
An 8-inch Type B venting system with a listed vent cap must terminate a minimum of _____ feet above the flat roof through which it passes.
A. 4
B. 1
C. 5
D. 2
Solutions:
| Question 1 Answer: D | Question 2 Answer: B | Question 3 Answer: B | Question 4 Answer: A | Question 5 Answer: B |
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