Self-Test D-2.2 Planning Interior DWV System Layouts

Complete Self-Test D-2.2 and check your answers.

1. When terminating a vent pipe through a roof structure, why is it a preferred practice to exit the building at a point that does not have sight lines from the adjoining street?
   1. Reduces frost closure
   2. Gives the building better aesthetics
   3. Improves sewer gas dissipation
   4. Usually requires a shorter vent length

    

2. If a building drain is to exit the building through a foundation wall, what is required during the forming stage in order to eliminate the need to core a hole in the cured concrete?
   1. Blocking or sleeves
   2. Flashing installation
   3. Approved caulking
   4. Nothing. A building drain is not allowed to penetrate a foundation wall.

    

3. What must be installed in conjunction with plastic DWV piping when it penetrates a fire-rated assembly?
   1. Silicone sealant
   2. Foam insulation
   3. Bitumen caulking
   4. Fire-stop system

    

4. Why is it important to limit the frequency and follow regulations when cutting and notching wooden framing components during a DWV Installation?
   1. Maintains the aesthetics of the building by eliminating the need for bulkheads
   2. Maintains the close clearances required from the pipe to the framing
   3. Maintains the strength and load-carrying capability of the framing

    

5. What force(s) should you consider when selecting and locating pipe supports to maintain pipe slope and alignment?
   1. Hydraulic testing
   2. Seismic forces
   3. Thermal expansion and contraction
   4. All of the above

    

Answer Key: Self-Test D-2.2 is on the next page.