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Water Supply Engineering

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

8.6 mm
10 mm
7.9 mm
7.2 mm

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Water Supply Engineering
The specific retention is least in case of

Coarse gravel.
Clay
Sand
Silt

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Water Supply Engineering
The fire demand of a city may be worked out by

Freeman formula
Bustan’s formula
Kuichling’s formula
All listed here

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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
Aeration of water is done to remove

hardness
bacterias
odour
colour

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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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