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Water Supply Engineering

Water Supply Engineering
The specific retention is least in case of

Coarse gravel.
Sand
Clay
Silt

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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

1485 m
1505 m
1500 m
1475 m

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Water Supply Engineering
Surge tanks are used

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

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Water Supply Engineering
If four fires break out in a city of population 40 lakhs and if each hydrant has three streams and duration of each fire is four hours, the total quantity of water required, is

1880 kilo litres
2880 kilo litres
4880 kilo litres
3880 kilo litres

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Water Supply Engineering
According to IS : 1172-1963, a minimum of 135 litres of water capita per day, is required for

All listed here
Nurses home and medical quarters
hostels
Boarding schools

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Water Supply Engineering
If the chosen diameter of a pipe, is less than the economical diameter

Head loss will be high
All listed here
Cost of pipe will be less
Cost of pumping will be more than saving

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