214 ppt3 Water Treatment Quiz

Put the stages of treatment in order.

• Sedimentation

• Filtration

• Chlorination

Who is responsible for the stages of water treatment?

• The government

• The water undertaker

• The local council

• The environmental agency

What is the purpose of primary sedimentation in water treatment?

• To add chemicals to the water

• To remove solid impurities and reduce bacterial content

• To increase the water temperature

• To add minerals to the water

Where is the rainfall initially collected for sedimentation?

• In underground tanks

• In lakes and reservoirs

• In filtration plants

• In water towers

What happens to the water after it is pumped from the storage reservoir?

• It is immediately distributed to homes

• It is held in sedimentation tanks for further sedimentation

• It is used for irrigation

• It is discarded

What role do algae play in the filtration process?

• They add nutrients to the water

• They assist in purifying the water by living off contaminants

• They increase the water flow speed

• They change the water's color

What happens as algae build up in the filtration process?

• The filtering process speeds up

• The filtering process slows down

• The water becomes contaminated

• The sand bed dissolves

How do rapid sand filters differ from slow sand filters?

• They operate without pressure

• They require no maintenance

• They speed up the process by operating under pressure

• They use chemical additives

What is the primary purpose of the filtration process shown in the diagram?

• To remove large debris from water

• To separate oil from water

• To purify dirty water into clean water

• To add minerals to water

Which material is used as the first layer in the filtration process depicted in the diagram?

• Gravel

• Fine sand

• Clay puddle

• Floor tiles