Quiz: 2024 International Residential Code (IRC) Chapter 25 Plumbing Administration

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1. Which of the following does Chapter P2501 establish regarding plumbing systems?

Material specifications and sizing charts
Fixture unit values and flow rates
General administrative requirements and inspection requirements
Permitted pipe support methods and spacing
Correct Answer: C

2. The administrative provisions of Chapter P25 of the IRC apply to the plumbing requirements of which chapters?

3. When is an existing building sewer required to be internally examined for verification of slope, integrity, and sizing?

Anytime a single fixture is replaced
Only when a new water heater is installed
Where the entire sanitary drainage system of an existing building is replaced
When connecting to a new public sewer line only
Correct Answer: C

4. Which of the following must be verified during the internal examination of an existing building sewer or building drain when the entire sanitary drainage system is replaced?

The material type and manufacturer date
That the piping is sloping correctly, is not broken, is not obstructed, and is sized for the new load
The depth of cover and soil compaction
The color and flexibility of the pipe material
Correct Answer: B

5. If an existing building drain under a concrete slab is to serve a newly replaced sanitary drainage system, what is required?

It must be completely replaced regardless of condition.
It only needs visual inspection from accessible ends.
It must be internally examined to verify proper slope, integrity, and sizing for the new load.
No examination is required if it was previously approved.
Correct Answer: C

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