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Water Supply Engineering

Water Supply Engineering
The least thickness of class B cast iron (spun) pipe, is

7.2 mm
7.9 mm
10 mm
8.6 mm

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Water Supply Engineering
By boiling water, hardness can be removed if it is due to

calcium bicarbonate
calcium sulphate
magnesium sulphate
calcium nitrate

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Water Supply Engineering
Pick up the incorrect statement from the following. The underground sources of water, is from

wells
springs
infiltration wells
storage reservoirs

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Water Supply Engineering
For determining the velocity of flow of underground water, the most commonly used non-empirical formula is

Hazen’s formula
Darcy’s formula
Slichter’s formula
Lacy’s formula

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

bacterias
turbidity
odour
colour

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Water Supply Engineering
The expected discharge to be obtained from an open well sunk in coarse sand is 0.0059 cumec. If the working depression head of the well is 3 m, the minimum diameter of the well, is

3.00 m
2.50 m
2.25 m
2 m

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