QUIZ on Water treatment
Choose one of the correct answer in the following questions :
1. Why does water have to be treated?
a) Because it is the law.
b) So that we can be sure it is safe to use.
c) So we can make it last longer.
2. How is ideal water described?
a) Freely available and safe from chemicals.
b) Clean, clear with no taste or smell and free of harmful substances.
c) Clean and fresh with added chemicals to protect our teeth.
3. What are cholera and typhoid two examples of?
a) Waterborne diseases.
b) Diseases that have been wiped out.
c) Chemicals used to treat water.
4. When can bugs and micro-organisms get into the water supply?
a) Water is too acidic or alkaline.
b) Water distribution systems are not closed.
c) Animals get into catchment areas and pollute the water.
5. How can other water contamination occur?
a) Old pipe systems corroding.
b) Physical contaminants.
c) People not washing their hands.
6. When does coagulation occur?
a) Chemicals are added to the water to make the particles stick together.
b) The water is churned around.
c) The particles settle on the tank surface.
7. What is sediment?
a) Another word for mud.
b) Filtered sand.
c) Matter heavier than water that collects on the bottom of the tank.
8. What are the main water treatments?
a) Coagulation, flocculation & sedimentation, filtration and disinfection.
b) Radiation, filtration and flocculation.
c) Coagulation, flocculation & sedimentation, closed systems and radiation.
9. How is water disinfected?
a) With a filter.
b) By radiation and chlorine.
c) With bleach.
10. Why does fluoridation take place?
a) To help water mix with toothpaste better.
b) To help see the water in the dark.
c) To help prevent tooth decay.
ANSWERS
1.b
2.b
3.a
4.c
5.b
6.a
7.c
8.a
9.b
10.c
Choose one of the correct answer in the following questions :
1. Why does water have to be treated?
a) Because it is the law.
b) So that we can be sure it is safe to use.
c) So we can make it last longer.
2. How is ideal water described?
a) Freely available and safe from chemicals.
b) Clean, clear with no taste or smell and free of harmful substances.
c) Clean and fresh with added chemicals to protect our teeth.
3. What are cholera and typhoid two examples of?
a) Waterborne diseases.
b) Diseases that have been wiped out.
c) Chemicals used to treat water.
4. When can bugs and micro-organisms get into the water supply?
a) Water is too acidic or alkaline.
b) Water distribution systems are not closed.
c) Animals get into catchment areas and pollute the water.
5. How can other water contamination occur?
a) Old pipe systems corroding.
b) Physical contaminants.
c) People not washing their hands.
6. When does coagulation occur?
a) Chemicals are added to the water to make the particles stick together.
b) The water is churned around.
c) The particles settle on the tank surface.
7. What is sediment?
a) Another word for mud.
b) Filtered sand.
c) Matter heavier than water that collects on the bottom of the tank.
8. What are the main water treatments?
a) Coagulation, flocculation & sedimentation, filtration and disinfection.
b) Radiation, filtration and flocculation.
c) Coagulation, flocculation & sedimentation, closed systems and radiation.
9. How is water disinfected?
a) With a filter.
b) By radiation and chlorine.
c) With bleach.
10. Why does fluoridation take place?
a) To help water mix with toothpaste better.
b) To help see the water in the dark.
c) To help prevent tooth decay.
ANSWERS
1.b
2.b
3.a
4.c
5.b
6.a
7.c
8.a
9.b
10.c