Waste Water Management

This is the part where solid wastes are allowed to settle down and light floatable wastes rise

• Grit Chamber

• Sedimentation Tank

• Aeration Tank

• None of These

We should not throw cooking oil and paint down the drain because

• they break the pipe

• they harden and clog the pipe

• they flow through the drain freely

• None of these

Tags

NGSS.MS-PS1-3

Sewage in large cities is known as

• Corporation wastewater

• Municipal wastewater

• Rural wastewater

• Urban wastewater

Septic tanks are mostly used in

• Urban cities

• Rural villages

• Isolated areas

• Semi-urban areas

Why shouldn't we pour pesticides & fertilizers down the drain?

• It clogs the drain

• It kills the sludge digestin' bacteria

• Cracks are formed in the pipelines as these things harden

• Pollutes the water bodies

Tags

NGSS.MS-ESS3-4

NGSS.MS-LS2-4

What is the first step of sewage treatment?

• Clarification

• Sieving

• Settling

• Aeration

Which of the following statement is correct?

• Chemicals like medicines, paints, insecticides should be disposed in sinks.

• Dispose tea leaves and food items in the kitchen sink.

• Wastewater from basins, sinks, and washing machines can be reused for watering plants or wiping floor.

• Leakage in sewer lines should not be checked regularly.

Tags

NGSS.MS-PS1-3

Sewage is mainly

• Liquid Waste

• Solid Waste

• Gaseous waste

• Mixture of solid and gaseous waste

Dried _____ is used as manure

• Slurry

• Sewage

• Sand

• Sludge

Which of these is not a source of wastewater?

• Houses

• Sewage

• Industries

• Hospitals