F2 SC Chapter 5 Water and Solution (Water Supply System)

In coagulation tank, why alum is added?

• To coagulate suspended particles in water.

• Te reduce the acidity of water

• To add flavor to the water.
• To increase the temperature of the water.

In coagulation tank, why slake lime is added?

• To coagulate suspended particles in water.

• Te reduce the acidity of water

• To kill the microorganisms

• To increase the temperature of the water.

Match the following

• Filtration tank

• 
• Oxidation tank

• 
• Coagulation tank

• 

Match the following

• Sedimentation tank

• 
• Chlorination and Fluoridation tank

• 
• Filtration tank

• 

Why fluoride compound is added into the tank?

• To prevent tooth decay.
• To increase water pressure.
• To enhance flavor.
• To remove impurities.

Why chlorine is added into the tank?

• To add flavor to the water.
• To kill the microorganisms

• To increase the water temperature.
• To change the water color.

In oxidation tank, the oxygen content in water is increased. Why?

• To reduce the acidity of water.

• To kill harmful bacteria and microorganisms

• To reduce the temperature of the water.
• To get rid of unpleasant of smell and taste