H1: Foul Water Drainage (Pages 6–12) Quiz

What is the minimum depth of the trap seal for a basin?

• 25 mm

• 38 mm

• 50 mm

• 75 mm

What is the minimum internal pipe diameter for a bath?

• 32 mm

• 38 mm

• 40 mm

• 50 mm

What is the minimum gradient for a 32 mm waste pipe up to 1.5m long?

• 1:20

• 1:40

• 1:18

• 1:30

What is the maximum allowed length for a 40 mm pipe without ventilation?

• 2m

• 1.5m

• 3m

• 4m

What is the minimum depth of trap seal required for a WC?

• 38 mm

• 50 mm

• 75 mm

• 85 mm

What size of pipe is required for a single WC?

(a)  

What is the minimum gradient for a 100 mm pipe up to 5m?

• 1:60

• 1:80

• 1:40

• 1:110

What fitting should be used when connecting a vertical pipe to a horizontal pipe?

• 90° bend

• Swept tee

• Straight tee

• Reducer

What is the required trap seal for a shower?

• 38 mm

• 50 mm

• 75 mm

• 25 mm

How far can a 32 mm waste pipe for a basin run horizontally without additional ventilation?

• 1.5m

• 2.0m

• 3.0m

• 4.0m