Free PDF Quiz 2026 Trustable M2: Free Commercial Mechanical Inspector Practice Exams

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International Code Council M2 Exam Syllabus Topics:

Section	Weight	Objectives
General Administration	18%	- Manufacturer's instructions and listings - Code authority and enforcement - Plan review and documentation - Permits and inspections
Combustion Air	8%	- Confined spaces and equipment rooms - Air supply and venting - Combustion air requirements
Chimneys & Vents	14%	- Factory-built chimneys and vents - Clearances and termination requirements - Chimney construction and materials - Vent systems and connections
Exhaust & Ventilation Systems	20%	- Hazardous and special exhaust systems - Makeup air systems - Commercial kitchen exhaust systems - Ventilation rates and outdoor air requirements
Fuel Supply Systems	10%	- Gas appliances and connections - Pressure regulation and overpressure protection - Piping testing and inspection - Fuel gas piping materials and installation
Heating, Cooling & Water Heaters	18%	- HVAC equipment installation and clearance - Solar thermal systems - Heat pumps and cooling equipment - Water heaters and storage tanks - Boilers and hydronic systems
Duct Systems	12%	- Duct construction and materials - Duct installation and supports - Insulation and sealing - Dampers and access doors

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Latest Updated International Code Council Free M2 Practice Exams: Commercial Mechanical Inspector

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International Code Council Commercial Mechanical Inspector Sample Questions (Q10-Q15):

NEW QUESTION # 10
Given: single-wall vent, which serves only one appliance, and has a height of 10 feet.
The maximum horizontal length permitted for a 5-inch diameter vent connector serving this vent is _____ feet.

A. 0
B. 7.5
C. 1
D. 2

Answer: B

Explanation:
For a single-wall vent connector serving one appliance, the maximum horizontal length is determined from the vent connector sizing and length rules. For a 5-inch diameter connector with a 10-foot vent height , the permitted maximum horizontal length is 7.5 feet . Therefore, Option B is correct.

NEW QUESTION # 11
To test for tightness, a consumer's gas piping should never be filled with:

A. dry air.
B. inert gas.
C. oxygen.
D. air.

Answer: C

Explanation:
The IFGC section on test medium states that the test medium shall be air, nitrogen, carbon dioxide or an inert gas , and specifically states that oxygen shall not be used as a test medium . That makes C the correct answer.

NEW QUESTION # 12
What type of cooking appliance is required to have its own independent hood and exhaust system?

A. Heavy-duty
B. Medium-duty
C. Extra-heavy-duty
D. Light-duty

Answer: C

Explanation:
The IMC specifically provides that Type I hoods used over extra-heavy-duty cooking appliances shall not cover other appliances requiring fire-extinguishing protection and shall discharge to an independent exhaust system . Therefore, D is correct.

NEW QUESTION # 13
What is the minimum air velocity that must be provided by an exhaust duct system serving a Type I range hood?

A. 1,500 FPM
B. 500 CFM
C. 2,500 FPM
D. 500 FPM

Answer: A

Explanation:
For commercial kitchen exhaust associated with Type I hood systems, the recognized code-based minimum duct transport velocity is 1,500 feet per minute , so C is the correct answer. Option B uses the wrong unit, and the other listed velocities do not match the code minimum used for this question type.

NEW QUESTION # 14
Ducts shall not be permitted to be connected to:

A. an evaporative cooler.
B. a vented wall furnace.
C. a gravity-type warm-air furnace.
D. a high-static-pressure-type unit heater.

Answer: B

Explanation:
The IMC appliance provisions prohibit duct connection to a vented wall furnace . That makes Option B correct. The exam tests recognition of appliance-specific distribution restrictions rather than general duct rules.

NEW QUESTION # 15
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