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

Most commonly used pump for lifting water in water supply mains, is

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

Economic height of a dam is the height corresponding to which

The R.L. of ground water table on the sides of a valley ism whereas R.L. of the stream water ism. Ifslope consists of pervious soil between R.L.m tom, the gravity spring may be expected at the point of reduced level

Distribution mains of any water supply, is normally designed for its average daily requirement

Water supply system includes

The factor affecting per capita demand, is

If pH value of water is

Corrosion of a pipe

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

In pressure supply mains, water hammer pressure is reduced by providing

Pick up the correct statement from the following :

Pick up the correct statement from the following :

Pick up the correct statement from the following :

Disinfection of drinking water, is done to remove

Sunlight

Manholes along the mains from the source to a city are provided atm intervals in

Asbestos pipes are

The expected discharge to be obtained from an open well sunk in coarse sand is 0.cumec. If the working depression head of the well is 3 m, the minimum diameter of the well, is

The population growth curve is

The maximum depth of sedimentation tanks is limited to

Average annual rainfall at any station is the average of annual rainfall over a period of

The transitional middle portion of a logistic curve follows