Self-Test D-1.2 DWV Terminology

Complete Self-Test D-1.2 and check your answers.

1. According to the BC Plumbing Code, a bathroom group consists of which components installed in the same room?
   1. One domestic lavatory, one WC, and one bathtub
   2. One domestic lavatory, one WC, and one bathtub with a single showerhead
   3. One domestic lavatory, one WC, and one single showerhead
   4. All of the above

    

2. What is the name given to a vent connected at its lower end to the junction of two or more vent pipes and at its upper end to a stack vent, vent stack, vent header, or open air?
   1. Circuit vent
   2. Branch vent
   3. Wet vent
   4. Continuous vent

    

3. What is the name given to a vent that serves two fixtures and connects at the junction of the trap arms?
   1. Circuit vent
   2. Branch vent
   3. Dual vent
   4. Relief vent

    

4. What is the name given to the length along the centreline of a pipe and fittings for the purpose of sizing?
   1. Centreline length
   2. Equivalent length
   3. Developed length
   4. Combined length

    

5. What is the name given to a fixture designed for overflow protection that does not receive regular discharge from other fixtures?
   1. Emergency floor drain
   2. Emergency fixture
   3. Emergency scupper
   4. Emergency drain pan

    

6. A pipe installed at 47° to the horizontal is said to be in what plane?
   1. Nominally horizontal
   2. Nominally vertical
   3. Horizontal
   4. Vertical

    

7. A fresh-air inlet is a vent pipe installed in conjunction with which component in a sanitary drainage system?
   1. Manhole
   2. Sewage sump basin
   3. Building trap
   4. Oil interceptor

    

8. What is the name given to a drainage pipe that extends from the trap of a fixture to a point of connection with another part of the drainage system?
   1. Branch
   2. Fixture drain
   3. Individual drain
   4. Trap drain

    

9. The top edge of a fixture or receptacle from which water can overflow is given what designation in the NPC?
   1. Concealed overflow
   2. Waste and overflow
   3. Standing waste
   4. Flood-level rim

    

10. When a drainage pipe is physically connected in such a way that water or gas cannot escape from the connection, it is said to be connected in which way?
    1. Air break
    2. Air gap
    3. Indirectly
    4. Directly

     

11. What is the name given to the portion of a fixture drain between the trap weir and the vent pipe fitting?
    1. Fixture outlet pipe
    2. Waste and overflow
    3. Trap arm
    4. Continuous waste

     

12. Identify the trap dip in Figure 1.
13. Identify the traps seal in Figure 1.
14. Identify the trap weir in Figure 1.
    

    

15. What is defined as a combination of elbows or bends that brings one section of pipe out of line but into a line parallel with the original section of pipe?
    1. Offset
    2. Barber’s loop
    3. Jumper configuration
    4. Running trap

     

16. What is the name of a vertical main sanitary drainage pipe that passes through one or more storeys?
    1. Stack
    2. Vent stack
    3. Stack vent
    4. Riser

     

17. Which of the following terms best describes a vent that is the extension of a vertical branch or fixture drain?
    1. Individual vent
    2. Continuous vent
    3. Dual vent
    4. Branch vent

     

18. According to the National Plumbing Code, what name is given to the unobstructed vertical distance between the lowest point of an indirect drainage system and the flood-level rim of the fixture into which it discharges?
    1. Air gap
    2. Air break
    3. Critical level
    4. Developed length

     

19. Which of the following terms best describes water with impurity levels that will not be harmful to health and may include HVAC condensate but does not include stormwater?
    1. Clear-water waste
    2. Sewage
    3. Effluent
    4. Potable water

     

20. What is the name given to a one-way valve that allows air to enter a plumbing drainage system when negative pressures develop in the piping?
    1. Backwater valve
    2. Check valve
    3. Pressure-reducing valve
    4. Air-admittance valve

     

21. Which of the following terms best describes a vent pipe that serves a number of fixtures and connects to the fixture drain of the most upstream fixture?
    1. Dual vent
    2. Vent stack
    3. Circuit vent
    4. Relief vent

     

22. What trade term is used to describe a trap for a fixture that is also used as the main support for the fixture?
    1. Drum trap
    2. Trap standard
    3. Crown-vented trap
    4. Bell trap

     

23. How far does a building drain continue outside the building wall before it can be considered a building sewer?
    1. 0.5 m
    2. 1 m
    3. 1.5 m
    4. 2 m

     

24. What is the main purpose of a venting system?
    1. Allows sewer gas to be taken to the roof terminal
    2. Protects the fixture traps
    3. Limits the fluid velocities in the stack
    4. Allows overflow to reach the building drain in the event of a blockage in the drainage line

     

25. What is the name given to a device installed in a building drain to prevent air from circulating between the drainage system and the public sewer?
    1. Backwater valve
    2. Air admittance valve
    3. Building trap
    4. Vacuum breaker

     

Answer Key: Self-Test D-1.2 is on the next page.