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Water Supply Engineering

Water Supply Engineering
Acidity in water is caused due to

Aluminium sulphate
Free CO₂
All the above.
Mineral acids

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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

1475 m
1485 m
1500 m
1505 m

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

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Water Supply Engineering
Asbestos pipes are

light in weight and easy to transport
All listed here
highly resistant to corrosion
very much smooth and hydraulically efficient

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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
Boarding schools
Nurses home and medical quarters
hostels

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

7.9 mm
8.6 mm
7.2 mm
10 mm

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