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Water Supply Engineering

Water Supply Engineering
The process of passing water through beds of granular materials, is called

Screening
Sedimentation
None of these
Filtration

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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

2.25 m
3.00 m
2 m
2.50 m

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Water Supply Engineering
The R.L. of ground water table on the sides of a valley is 1505 m whereas R.L. of the stream water is 1475 m. If 60° slope consists of pervious soil between R.L. 1485 m to 1500 m, the gravity spring may be expected at the point of reduced level

1505 m
1500 m
1475 m
1485 m

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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
Surge tanks are used

to guard against water hammer
as overflow valves
for storage water
to increase the velocity in a pipeline

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Water Supply Engineering
For the prediction of future population of a city, the factor to be considered, is

Deaths
All listed here
Births
Migrants

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