Unit 209: Drainage systems - Outcome 4 (part 2)

Multiple Choice

Which of the following factors is NOT important when considering the roof area for rainwater systems?

• The actual size of the roof area

• The angle of the roof area

• The color of the roof

• The material of the roof

Open Ended

Why is it important to consider both the size and angle of the roof area when designing rainwater systems?

Multiple Choice

Which two factors affect the amount of rainwater collected and the velocity at which water enters the guttering?

• Roof area and outlet position

• Roof area and roof slope

• Roof area and roof material

• Roof area and gutter size

Open Ended

Explain how the position of the running outlet impacts the efficiency of a rainwater system.

Multiple Choice

Based on the diagram, which locations are most suitable for placing rainwater outlets on a roof?

• At the highest points of the roof

• At the corners and lowest points of the roof

• In the center of the roof

• Near the inspection chamber

Open Ended

Why is the ratio 1:600 (1mm drop every 600mm length) considered an efficient standard for gutter fall in modern rainwater systems?

Multiple Choice

Which of the following practices should be avoided to maintain the efficiency of water flow in a gutter system?

• Installing an outlet too close to a change in direction

• Reducing the fall ratio when there are many changes in direction

• Having straight runs in the gutter system

• Placing outlets after every change in direction

Open Ended

How would you apply what you learned about roof area factors to a real-world installation of a rainwater system?

Multiple Choice

What are the two important factors to consider when assessing a roof area for rainwater systems?

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

• The color of the roof and the material used

• The number of windows and the height of the building

• The location of the building and the type of drainage system