International Code Council M2 real exam prep : Commercial Mechanical Inspector

  • Exam Code: M2
  • Exam Name: Commercial Mechanical Inspector
  • Updated: Aug 19, 2026
  • Q&As: 52 Questions and Answers

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M2 exam dumps

International Code Council M2 Exam Syllabus Topics:

SectionObjectives
Topic 1: General Administration- Code Scope and Administration
  • 1. Referenced Standards
  • 2. Definitions
  • 3. Permits and Inspections
Topic 2: Duct Systems- Duct Construction
  • 1. Materials and Installation
  • 2. Dampers and Protection
- Air Distribution
  • 1. Duct Insulation
  • 2. Plenums
Topic 3: Heating and Cooling Systems- Heating Appliances
  • 1. Boilers
  • 2. Furnaces
  • 3. Water Heaters
- Cooling Systems
  • 1. Refrigeration Equipment
  • 2. Cooling Appliances
Topic 4: Chimneys and Vents- Connectors and Terminations
  • 1. Vent Connectors
  • 2. Termination Requirements
- Vent Systems
  • 1. Chimney Clearances
  • 2. Vent Sizing
Topic 5: Combustion Air and Fuel Supply- Fuel Supply Systems
  • 1. Fuel Oil Systems
  • 2. Fuel Gas Piping
- Combustion Air
  • 1. Indoor and Outdoor Air Requirements
  • 2. Combustion Air Openings
Topic 6: Materials and Specifications- Approved Materials
  • 1. Installation Standards
  • 2. Equipment Labeling
Topic 7: Hydronic Piping and Refrigeration- Refrigeration
  • 1. Refrigerant Piping
  • 2. Safety Controls
- Hydronic Systems
  • 1. Pressure Testing
  • 2. Piping Installation
Topic 8: Ventilation and Exhaust Systems- Ventilation
  • 1. Mechanical Ventilation
  • 2. Exhaust Air Systems
- Commercial Kitchens
  • 1. Grease Ducts
  • 2. Kitchen Exhaust Hoods

International Code Council Commercial Mechanical Inspector Sample Questions:

1. Floor furnaces shall not be closer than _____ inches to the ground.

A) 12
B) [option text not fully visible in the material you sent]
C) [option text not fully visible in the material you sent]
D) [option text not fully visible in the material you sent]


2. A cooling system with a condensate disposal system:

A) shall be made of an approved pipe and be at least 1/2-inch in diameter.
B) 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.
C) shall have all horizontal sections of drain piping installed with a minimum of 1/4 inch per foot slope.
D) shall not be less than 3/4-inch PVC pipe or equivalent approved material.


3. When a furnace is installed in a 66-inch-high attic, the maximum distance from the passageway access to the furnace shall be _____ ft., measured along the centerline of the passageway.

A) 20
B) 15
C) 10
D) 50


4. Given: The listed clearance is 12 inches.

What would be the reduced clearance to combustibles, in inches, if the millboard is replaced with 24-gauge sheet metal?

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


5. Given: A recirculating industrial direct-fired makeup air heater has a rated input of 200,000 Btu/h .
Ventilation air is supplied by separate mechanical means.
Outside ventilation air shall be provided to supply at least _____ CFM.

A) 800
B) 1250
C) 400
D) 250


Solutions:

Question # 1
Answer: B
Question # 2
Answer: B
Question # 3
Answer: A
Question # 4
Answer: B
Question # 5
Answer: A

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