F2 5.3 Water supply system

People must have _______ to drink in order to survive.

• frozen water
• clean water
• contaminated water
• polluted water

What is the best way to purify water?

• Add salt

• Put inside the refrigerator

• Filtration or Boiling

• Find a very clean stream of water

Which of these particles is NOT able to pass through a sand, gravel, and charcoal filter?

• bacteria

• water

• viruses

• large piece of dirt

What does chlorination do to the water?

• kills microorganisms

• Cleans the water

• Makes the water taste nice

• Removes twigs and sediment

A Leibeg condenser is used in

• filtration

• evaporation

• chromatography

• distillation

methods of water purification are

• Boiling, filtration, Chlorination and distillation

• Boiling, filtration, evaporation and condensation

• Boiling , filtration, condensation and distillation

• Boiling, filtration, screening and chlorination

Which of the following methods can kills microorganisms?

• chlorination and distillation

• boiling and filtration

• boiling and chlorination

• filtration and distillation

Disadvantages of distillation methods:

• water is free from suspended particles

• water contains dissolved minerals and salts

• not suitable for drinking

• it produces distilled water

The first step in water treatment plant is

• chlorination to kills microorganisms

• fluoridation to prevents tooth decay

• screening to removes large objects such as fish and twigs

• aeration to removes unpleasant odour

what is added during coagulation process in water treatment plant

• alum and slaked lime

• florida

• chlorine

• calcium carbonate