M2 Commercial Mechanical Inspector Questions and Answers

For this type of continuously ventilated exhaust shaft serving a multifamily building, the code requires the kitchen exhaust connection to penetrate the shaft and extend vertically not less than 22 inches without a fire damper. That matches Option D .

The fuel gas venting provisions state that the exit terminals of mechanical draft systems shall be not less than 7 feet above grade where located adjacent to public walkways. Therefore, A is the correct answer.

The IFGC requires the appliance shutoff valve to be located in the same room as the appliance and within 6 feet of the appliance . Therefore, the correct answer is A .

The ICC mechanical code requires the lowest portion of a floor furnace to have not less than 6 inches (152 mm) clearance from grade level . Therefore, the correct choice is the option corresponding to 6 inches , which is C based on your answer set.

Under the IMC ventilation table, locker/dressing rooms and sports locker rooms are identified with required mechanical exhaust, while spaces such as guard stations do not carry that same exhaust requirement in the table. A high school locker room falls within the locker-room/sports-locker-room category, so Option C is the correct answer. Gambling casinos and office break rooms are provided outdoor air rates, but they are not the required-exhaust space among these listed choices.

Solid-fuel cooking equipment requires a separate hood and exhaust system . It is not permitted to share the same hood/exhaust arrangement in the manner suggested by the other choices. This is a standard commercial kitchen exhaust requirement because of the added fire and residue hazards associated with solid-fuel appliances.

For mechanical draft venting systems, unless the appliance is listed for a different clearance, the vent terminal must be located not less than 4 feet below , 4 feet horizontally from , or 1 foot above any door, operable window, or gravity air inlet into a building. Therefore, the required minimum distance below an openable window is 4 feet , so Option B is correct.

Based on the specification sheet shown in the exhibit, the hood is fabricated of Type 430 stainless steel , and the optional stainless steel listed is Type 304 . Therefore, the correct answer is C .

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.

The IMC combustion-air provisions require openings used for combustion air to have a minimum cross-sectional dimension of 3 inches . Where ducts are used, they must be of the same cross-sectional area as the openings to which they connect. That makes 3 inches the correct answer, so Option B is correct.

For cooking equipment with exposed flame and burners , the IMC table for grease-filter mounting position requires a minimum vertical separation of 24 inches between the lowest edge of the grease filter and the cooking surface. That makes B correct.

The ICC administrative provisions require construction documents to be submitted in two or more sets with the permit application. After approval, one set is retained by the code official and one set is returned to the applicant to be kept on the job site during construction. That is exactly the condition described in Option D . The code does not state that all sets are retained by the code official or that the purpose is to provide subcontractor copies or backup copies.