Self-Test D-2.5 Installing DWV Systems

Complete Self-Test D-2.5 and check your answers.

1. What workplace safety requirements must a plumber comply with while working?
   1. CSA Standards
   2. National Plumbing Code
   3. Manufacturer’s regulations
   4. OHS Regulation

    

2. When a job-site tool needs maintaining and servicing, what source of information would a plumber refer to in order to find the proper procedures?
   1. Project specifications
   2. Manufacturer’s specifications
   3. Wholesaler’s recommendations
   4. OHS Regulation

    

3. The NPC requires that all gravity drainage piping be graded at least 1:50 in the direction of flow. What gravity drainage piping section is an exception to this requirement?
   1. 3 in. branch
   2. 3 in. building drain
   3. 3 in. fixture drain
   4. 4 in. building drain

    

4. How much distance from an obstruction should be maintained from a C/O for adequate use of drain cleaning equipment?
   1. 1 ft (300 mm)
   2. 2 ft (600 mm)
   3. 3 ft (900 mm)
   4. 4 ft (1,200 mm)

    

5. When determining the location of a cleanout fitting serving above-grade drainage piping, why is it important to consider the process being performed on the floor below?
   1. Minimizes the damage caused to sensitive equipment in the event of a blockage
   2. Minimizes the noise generated by the drain-cleaning equipment during the cleaning process
   3. Eliminates the plumber having to work in occupied spaces during the cleaning process
   4. Reduces the disruption of the building processes due to the blockage

    

6. During a typical DWV installation, how many tests are performed on the system?
   1. 2
   2. 3
   3. 4
   4. 5

    

7. What factors usually determine the type of roof flashings used when installing a vent terminal?
   1. Snow loading
   2. Rainfall intensity
   3. Roof slope and cladding material
   4. Directional orientation

    

8. When placing a sleeve through a concrete wall for the future installation of a DWV piping section, how much larger should the ID of the sleeve be compared to the OD of the DWV piping?
   1. 1 in. (25 mm)
   2. 2 in. (50 mm)
   3. 3 in. (75 mm)
   4. 4 in. (100 mm)

    

9. When a fire-stopping material is said to be intumescent, what property does it have?
   1. Shrinks when cooled
   2. Expands when cooled
   3. Shrinks when heated
   4. Expands when heated

    

10. What type of device is used to fire-stop plastic DWV penetrations when a relatively large annular space is present?
    1. Mortar mix
    2. Fire collar
    3. Intumescent caulking
    4. Fire flashing

     

11. What is the most common test for DWV piping systems?
    1. Smoke test
    2. Ball test
    3. Air test
    4. Water test

     

12. What must be checked when receiving hazardous products?
    1. Quantity
    2. Colour
    3. Labels
    4. Price

     

13. What should be done with construction waste?
    1. Sort before disposal
    2. Label properly
    3. Reduce quantity
    4. Plan for recycling and reuse

     

Answer Key: Self-Test D-2.5 is on the next page.