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2024 International Residential Code (IRC)
Chapter 30 Sanitary Drainage

Quiz: 2024 International Residential Code (IRC) Chapter 30 Sanitary Drainage

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1. What provision is NOT considered adequate for protecting above-grade DWV systems from freezing temperatures in localities with a winter design temperature of 32°F (0°C) or less?

Insulation
Heat tracing
Enclosure in an unheated attic
Both insulation and heat tracing

2. In flood hazard areas as defined by Table R301.2, what is the primary requirement for drainage, waste, and vent systems?

Systems must be elevated above the flood hazard level.
Systems must be constructed with flood-resistant materials only.
Systems must prevent infiltration of floodwaters and discharge into floodwaters.
Systems are exempt from special requirements if located underground.

3. According to IRC Chapter 30, which of the following pipe materials is explicitly prohibited for underground use in DWV piping within buildings?

ABS plastic pipe
Cast-iron pipe
Galvanized wrought-iron pipe
Copper or copper-alloy tubing (Type K)

4. Which of the following is an approved material for above-ground drainage and vent pipe, according to Table P3002.1(1)?

Polyethylene (PE) plastic pipe (SDR-PR)
Vitrified clay pipe
Polyolefin pipe
Concrete pipe

5. For underground building drainage and vent pipe, which type of stainless steel is listed as an approved material in Table P3002.1(2)?

Type 304 only
Type 316L only
Both Type 304 and Type 316L
Stainless steel is not permitted underground.

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