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🔹Scope – Commercial Mechanical Inspector
A Commercial Mechanical Inspector is responsible for inspecting mechanical systems in commercial buildings to ensure installations meet the requirements of the International Mechanical Code and referenced standards. This includes verifying proper equipment installation, venting, ductwork, combustion air, and fuel gas systems. Inspectors must be able to interpret code provisions accurately, evaluate construction for compliance with approved plans and manufacturer instructions, and confirm that systems operate safely and efficiently in all commercial applications.
🔹 Exam Information
About the ICC Commercial Mechanical Inspector Exam
- Based on:
- 2024 International Mechanical Code (IMC)
- 2024 International Fuel Gas Code (IFGC)
- Format: Open-book, multiple choice
- Time: 2 hours (50 questions)
- Passing Score: 75%
🔹Exam Content Breakdown – 2024 Commercial Mechanical Inspector🔹
| Exam Section | Suggested Study Chapters / Focus |
|---|---|
| ✅ General Administration (18%) | IMC Chapter 1 – Scope and Administration; IBC Chapter 1 – Administration |
| ✅ Heating/Cooling/Water Heaters (18%) | IMC Chapters 2–3 (Definitions & General Regulations) IMC Chapter 9 – Specific Appliances IFGC Chapters 4–5 (Gas Piping & Venting) |
| ✅ Exhaust and Ventilation Systems (20%) | IMC Chapter 5 – Exhaust Systems IMC Chapter 4 – Ventilation IMC Chapter 3 – General Regulations |
| ✅ Duct Systems (12%) | IMC Chapter 6 – Duct Systems; Sections 603–607 (Construction, Installation, Fire and Smoke Dampers) |
| ✅ Combustion Air (8%) | IFGC Chapter 3 – General Regulations; Section 304 – Combustion, Ventilation, and Dilution Air |
| ✅ Chimneys and Vents (14%) | IMC Chapter 8 – Chimneys and Vents IFGC Chapter 5 – Venting of Appliances |
| ✅ Fuel Supply Systems (10%) | IFGC Chapter 4 – Gas Piping Installations; Sections 402–406 (Materials, Sizing, Testing, and Connections) |
🔹 Study Tips
- Focus extra time on the highest-weighted sections — they carry the most points on the exam.
- Mark your codebook with tabs for fast navigation.
- Practice under timed conditions to simulate real test pressure.
- Use flashcards for quick lookup and instant feedback when reviewing material.
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