Environmental Engineering
The suitable method for disinfection of swimming pool water is

Ultra violet rays treatment
By using potassium permanganate
Lime treatment
Chlorination

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Environmental Engineering
Scour valves are provided

At every depression and dead ends to drain out the waste water that may collect there
At street corners to control the flow of water
At the foot of rising main along the slope to prevent back running of water
At every summit of rising mains

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