Plumbing level 2 - PP4.2- Drainage

What are the two important factors to consider with the roof area?

• The height of the building and the number of floors

• The type of gutter and the number of outlets

• The actual size of the roof area and the angle of the roof area

• The color of the roof and the material used

What is the function of a running outlet?

• To connect the gutter to the downpipe and cope with water flowing from two directions

• To increase the height of the roof

• To change the direction of the gutter

• To connect the roof to the walls

How do you determine the number of outlets a roof line may require?

• By counting the number of windows

• By checking the color of the roof

• By dividing the expected flow rate of the roof area by the flow rate for the outlet

• By measuring the length of the roof

According to BS EN 12056, what should be the fall of the gutter?

• Between 20-30mm per metre length

• Between 1-3mm per metre length

• Between 5-10mm per metre length

• Between 10-20mm per metre length

What is the accepted fall ratio in the trade for gutters?

• 1:100

• 1:200

• 1:600

• 1:1000

What should be avoided to maintain the efficiency of the flow of water in a gutter system?

• Too many changes in direction without an outlet

• Using straight runs

• Installing outlets far from changes in direction

• Reducing the fall ratio