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2024 International Building Code
Chapter 12: Interior Environment

Quiz: 2024 International Building Code Chapter 12: Interior Environment

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1. Which of the following topics is NOT governed by the provisions of Chapter 12 of the International Building Code?

Ventilation
Sound transmission
Fire-resistance ratings
Interior space dimensions

2. Dwelling units complying with the air leakage requirements of the International Energy Conservation Code (IECC) or ASHRAE 90.1 shall be ventilated by which means?

Natural ventilation only
A combination of natural and mechanical ventilation
Mechanical means in accordance with the International Mechanical Code
Either natural or mechanical ventilation, at the owner's discretion

3. For enclosed attics and rafter spaces, what is the minimum net free ventilating area required, relative to the area of the space ventilated, without exceptions?

1/300
1/100
1/150
1/200

4. Under what condition can the net free cross-ventilation area in attics be reduced to 1/300 of the ventilated area?

In Climate Zones 4 or 5, with at least 60% of venting area in the upper portion.
In Climate Zones 6, 7, and 8, with a Class I or II vapor retarder and 40-50% of venting area in the upper portion.
In any climate zone, if a continuous vapor barrier is present.
Only for roofs with a slope greater than 6:12.

5. When the net free cross-ventilation area is reduced to 1/300 in attics, what is the maximum distance below the ridge or highest point that upper ventilators can be located, measured vertically?

1 foot (305 mm)
2 feet (610 mm)
3 feet (914 mm)
5 feet (1524 mm)

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