306A Water Supply Systems

Question 1

What is the minimum hot water supply temperature at a residential fixture outlet according to Canadian plumbing standards?

Accepted Answer

43°C

Answer

38°C

Answer

49°C

Answer

60°C

Question 2

What is the minimum water pressure required at a fixture outlet for proper operation?

Accepted Answer

140 kPa (20 psi)

Answer

69 kPa (10 psi)

Answer

103 kPa (15 psi)

Answer

207 kPa (30 psi)

Question 3

What is the maximum static water pressure permitted at a fixture outlet?

Accepted Answer

552 kPa (80 psi)

Answer

345 kPa (50 psi)

Answer

414 kPa (60 psi)

Answer

689 kPa (100 psi)

Question 4

What type of valve must be installed on the water supply to each dwelling unit?

Accepted Answer

Gate valve or ball valve (full-port shutoff)

Answer

Check valve

Answer

Pressure-reducing valve

Answer

Mixing valve

Question 5

What is the purpose of a water hammer arrestor in a supply system?

Accepted Answer

To absorb the shock wave caused by sudden valve closure

Answer

To filter sediment from the water

Answer

To reduce static pressure

Answer

To prevent backflow

Question 6

What is the minimum size of a water service pipe for a single-family dwelling?

Accepted Answer

¾ inch

Answer

½ inch

Answer

1 inch

Answer

1¼ inch