Water Supply Engineering - Section 1 (2)

Disinfection of drinking water, is done to remove

Pick up the incorrect statement from the following. The underground sources of water, is from

The factor affecting per capita demand, is

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

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

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

For determining the velocity of flow of underground water, the most commonly used non-empirical formula is

Q is the discharge from an unconfined tube well with depression head s through its pipe of radius rw. If the radius of influence is R, the length of the required strainer, is