International Code Council M2 Actual Free Exam Questions & Community Discussion

Exam Code/Number: M2
Exam Name/Title: Commercial Mechanical Inspector
Certification Provider: International Code Council
Corresponding Certification: Commercial Inspector

Exam Questions: 52
Updated On: Jul 12, 2026

Question #7

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. 5

B. 10

C. 7.5

D. 9

Discussion 0

Correct Answer: C Vote an answer

Explanation: Only visible for EduDump members. You can sign-up / login (it's free).

Question #8

Given: Fabricated of type 430 stainless steel.

Optional type _____ stainless steel is available.

A. 316

B. 303

C. 304

D. 301

Discussion 0

Correct Answer: C Vote an answer

Explanation: Only visible for EduDump members. You can sign-up / login (it's free).

Question #9

Indoor combustion air shall be provided within:

A. 2 feet of the ceiling and 1 foot of the floor.

B. 1 foot of the ceiling and 1 foot of the floor.

C. 2 feet of the ceiling and 2 feet of the floor.

D. 1 foot of the ceiling and 2 feet of the floor.

Discussion 0

Correct Answer: B Vote an answer

Question #10

The minimum size for access openings for fire dampers shall be:

A. 12 inches by 12 inches.

B. one-half the diagonal of the access opening.

C. adequate to permit maintenance and resetting of the damper.

D. the same as the dimension of the duct.

Discussion 0

Correct Answer: C Vote an answer

Explanation: Only visible for EduDump members. You can sign-up / login (it's free).

Question #11

The exhaust outlet for a clothes dryer is required to be equipped with:

A. a backdraft damper.

B. an automatically controlled volume damper.

C. a temperature limit control device that will automatically shut off the system at a temperature of 250°F.

D. a corrosion-resistant screen of 1/4-inch mesh.

Discussion 0

Correct Answer: A Vote an answer

Explanation: Only visible for EduDump members. You can sign-up / login (it's free).

Question #12

Ducts shall not be permitted to be connected to:

A. a high-static-pressure-type unit heater.

B. an evaporative cooler.

C. a gravity-type warm-air furnace.

D. a vented wall furnace.

Discussion 0

Correct Answer: D Vote an answer

Explanation: Only visible for EduDump members. You can sign-up / login (it's free).

Download Free International Code Council M2 Demo

Simply submit your e-mail address below to get started with our free demo of your International Code Council M2 exam.