1.
The hourly variation factor is usually taken as______________?

2.
The distribution mains are designed for________________?

3.
The depression of water table in a well due to pumping will be maximum_______________?

4.
The type of valve, which is provided on the suction pipe in a tube-well, is____________?

5.
As compared to shallow-wells, deep wells have______________?

6.
The polluted water is one which_______________?

7.
The most common cause of acidity in water is_______________?

8.
Alkalinity in water is expressed as milli-grams per litre in terms of equivalent_______________?

9.
The maximum permissible limit for flouride in drinking water is______________?

10.
Turbidity is measured on_______________?