306A Water Supply Systems 2

Question 1

What is the Water Supply Fixture Unit (WSFU) value for a standard residential water closet with a flush tank?

Accepted Answer

2.5

Answer

1.5

Answer

3.0

Answer

5.0

Question 2

When sizing water supply piping, what is the primary factor that determines friction loss?

Accepted Answer

Flow velocity and pipe length

Answer

Water temperature

Answer

Pipe material only

Answer

Static pressure

Question 3

What is the maximum flow velocity recommended in water supply piping to minimize noise and erosion?

Accepted Answer

2.4 m/s (8 fps)

Answer

1.2 m/s (4 fps)

Answer

1.8 m/s (6 fps)

Answer

3.0 m/s (10 fps)

Question 4

What material is commonly used for water service piping entering a building below grade in Canada?

Accepted Answer

Copper Type K

Answer

Galvanized steel

Answer

ABS

Answer

PEX-AL-PEX

Question 5

At what temperature must a thermostatic mixing valve (TMV) limit the output for public lavatory faucets to prevent scalding?

Accepted Answer

49°C

Answer

38°C

Answer

43°C

Answer

55°C

Question 6

What is the purpose of a pressure-balancing valve in a shower installation?

Accepted Answer

To maintain consistent water temperature during pressure fluctuations

Answer

To increase water pressure to the showerhead

Answer

To reduce water consumption

Answer

To prevent backflow into the supply