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Water Supply Engineering

Water Supply Engineering
Mathamoglobinemia or blue baby disease is caused due to

Sulphides
Nitrates
Chlorides
Nitrites

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Water Supply Engineering
Biochemical Oxygen Demand (B.O.D.) of safe drinking water must be

10
nil
5
15

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Water Supply Engineering
To pump water from a water reservoir 3 m deep and maximum water level at 135 m, a pump is installed to lift water up to R.L. 175 m at a constant rate of 36,00,000 litres per hour. If the length of the pipe is 1506 m and f = 0.01, ignoring other minor losses and assuming the economical diameter from Lea's formula D = 1.2 √Q, the water horse power of the pump is

450
400
500
600

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Water Supply Engineering
In slow sland filters, the turbidity of raw water can be removed only up to

75 mg/litre
150 mg/litre
60 mg/litre
100 gm/litre

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

65 litres
105 litres
85 litres
135 litres

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Water Supply Engineering
Disinfection of drinking water, is done to remove

turbidity
odour
bacterias
colour

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