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Water Supply Engineering

Water Supply Engineering
Average annual rainfall at any station is the average of annual rainfall over a period of

14 years
35 years
21 years
28 years

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Water Supply Engineering
Surcharge storage zone of a reservoir, is

Between dead storage and useful storage
Below dead storage
Above useful storage
Also known as valley storage

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Water Supply Engineering
In pressure supply mains, water hammer pressure is reduced by providing

Pressure relief valves
Sluice valves
Air valves
None of these

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Water Supply Engineering
As per IS : 1172-1963, water required per head per day for average domestic purposes, is

135 litres
65 litres
105 litres
85 litres

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Water Supply Engineering
In distribution pipes, drain valves are provided at

lower point
any where
higher point
junction points

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Water Supply Engineering
Acidity in water is caused due to

Aluminium sulphate
Mineral acids
Free CO₂
All the above.

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