Topic 6

What is the clear definition of Drainage?

• Infrastructure that conveys sewage

• Water distribution networks

• Artificial removal of water, both surface and sub-surface

• Infrastructure that conveys rubbish

What is the purpose of surface water drainage?

• Infrastructure to distribute water from main water pipe.

• Infrastructure to remove excess water from the surface of the land.

• Infrastructure to impounding water to harvest fish.

• Infrastructure to trap and dump rubbish.

Surface water drain must be laid as straight as possible (less curves and corners) to ensure rapid water flow.

• TRUE

• FALSE

The picture or the layout is a type of underground drainage system, and it is for:

• Separate system

• Partially separate system

• Combined system

Definition of subsoil water.

• Water is collected from domestic waste.

• Water is collected from surfaces of paved area.

• Water is collected from the earth.

• Water is collected from surfaces of roofs.

Subsoil drainage can be used to: (More than 1 answer)

• To discharge domestic solid waste

• To improve ground stability

• To enhance horticultural properties for landscaping

• To increase the subsoil's water table

Subsoil and surface water are considered to be clean and can be discharged into an approved watercourse or soak away without treatment.

• TRUE

• FALSE

The discharge water from a building downpipe can be: (More than 1 answer)

• Directly connected to a drain discharging into a soak away.

• Directly connected to a drain discharging into a surface water sewer.

• Indirectly connected to a drain via a trapped gully if the drain discharges into a combined sewer.

• Indirectly connected to a drain to be discharges into a sea.

Soil and waste pipe system is function to:

• Prevent foul gases from entering the building.

• Prevent from loss of water in the traps.

• Carry away the discharge from sanitary fittings.

• To provide enough amount of water for flow of discharge from sanitary fittings.

Soil and waste pipe to carry away sewage and wastewater together with rainwater as a complete discharge solution.

• TRUE

• FALSE