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2024 International Building Code (IBC)
Chapter 12 Interior Environment

Quiz: 2024 International Building Code (IBC) Chapter 12 Interior Environment

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1. What is the scope of Chapter 12 of the 2024 International Building Code?

Structural design and fire protection only
Ventilation, lighting, sound transmission, and interior space dimensions
Plumbing fixtures and electrical wiring exclusively
Exterior landscaping and zoning requirements

2. According to Section 1202.1, which buildings must be ventilated by mechanical means in accordance with Section 407 of the International Mechanical Code?

Group R-3 dwelling units
Group M mercantile occupancies
Ambulatory care facilities and Group I-2 occupancies
All buildings exceeding 10 stories

3. In a ventilated attic, what is the minimum required airspace between the insulation and the roof sheathing?

1/2 inch
1 inch
2 inches
3 inches

4. What is the general minimum net free ventilating area ratio for enclosed attics and rafter spaces?

1/100 of the area ventilated
1/150 of the area ventilated
1/300 of the area ventilated
1/500 of the area ventilated

5. Under what condition can the net free cross-ventilation area for an attic be reduced to 1/300 in Climate Zones 6, 7, and 8?

If the attic has a reflective roof coating
If a Class I or II vapor retarder is installed on the warm-in-winter side of the ceiling
If the roof slope is less than 2:12
If the building is less than 2,000 square feet

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