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10000CE405122101

Discuss the process of coagulation. Explain any two coagulants used for water
treatment.
A city has a population of 25,000 with an average rate of demand as 150
litres/capita/day. Assume maximum demand as 1.8 times the average demand.
Find the area of slow sand filters if the average rate of filtration is 175
litres/hour/m’of filter area.
PART C

Answer any two full questions, each carries 20 marks.
Explain different types of chlorination.
Discuss any two methods adopted in water treatment to remove colour, taste and
odour from water.
Explain the importance of fluoridation and defluoridation techniques in water
treatment. Suggest methods for each technique.
Illustrate with sketches the different layouts of water distribution network.
Explain Hardy Cross method for the analysis of complex pipe networks.
Write short notes on (i) Sluice valve (ii) Fire hydrant (iii) Water meter
Explain lime soda process for removing hardness from water.
Combined gravity and pumping system is generally preferred for water
distribution. Why?

What are the essential requirements of a good distribution system?

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