Free International Code Council M2 Practice Exam with Questions & Answers | Set: 2

A low-pressure steam heating boiler is defined as a boiler furnishing steam at pressures not exceeding 15 psi . That matches Option B .

For indoor combustion air openings, one opening must commence within 12 inches of the top of the enclosure and one within 12 inches of the bottom . That corresponds to 1 foot of the ceiling and 1 foot of the floor , so Option A is correct.

The applicable provision requires direct-fired industrial air heaters to supply outside ventilation air at a rate of not less than 4 cfm per 1,000 Btu/h of rated input where ventilation air is provided by separate mechanical means. For 200,000 Btu/h , the required outside air is:

200,000 ÷ 1,000 = 200

200 × 4 = 800 cfm

So the correct answer is C

ICC clearance-reduction tables allow a listed clearance of 18 inches to be reduced to 9 inches where 24-gauge sheet metal is installed with a 1-inch ventilated airspace from the combustible wall. Therefore the correct answer is the option corresponding to 9 inches , which is B in your set.

For a Type B gas vent with a listed vent cap terminating through a flat roof , the minimum required termination height is 1 foot above the roof . That makes Option A correct. This is consistent with gas vent termination tables used with listed Type B vent systems and the code framework for Type B vent terminations.