WASTE WATER STORY

What is a sewage treatment plant?

• The place where water is cleaned, filtered and tested before re-entering the water cycle.

• The place where water is cleaned, filtered and tested before going to our houses.

• The network of pipes that carry sewage (dirty water) from our houses.

• The place where water is bottled for drinking.

What type of living things eat the organic matter in the sewage?

• Plants

• Animals

• Bacteria

• Fungi

In which part of the Waste water treatment does the the sludge and scum separated from the liquid?

• Inlet works

• Clarifiers

• Sewage treatment plant

• Bio reactor

Which of the following is not a source of waste water ?

• sewers

• homes

• industries

• hospitals

Open drain system is a breeding place for which of the following ?

• files

• mosquitoes

• organisms which cause diseases

• all of theses

Water polluted by various human activities causes a number of water borne diseases . Which of the following is not a water borne disease .

• cholera

• typhoid

• asthma

• dysentry

Pick from the following one chemical used to disinfect water.

• chlorine

• coal

• washing soda

• silica

Which of the following chacteristic nature will indicate the waste water?

• Dirty look

• Foul smell

• Mixed with lather

• All 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

In the treatment of waste water, following steps are involved. (i) aeration (ii) removal of large objects (iii) chlorination The correct order of these steps is

• (i),(iii),(ii)

• (iii), (ii), (i)

• (i), (ii), (iii)

• (ii), (i), (iii)