For determining the velocity of flow of underground water, the most commonly used non-empirical formula is________________? A. Darcy’s formula B. Slichter’s formula C. Hazen’s formula D. Lacy’s formula
The specific retention is least in case of_______________? A. Clay B. Sand C. SiltD. Coarse gravel
The factor affecting per capita demand, is___________________? A. size of the city B. climatic conditions C. pressure in water mains D. cost of waterE. all the above
According to IS : 1172-1963, a minimum of 135 litres of water capita per day, is required for________________? A. Boarding schools B. Nurses home and medical quarters C. hostelsD. all the above
The underground sources of water, is from______________? Pick up the incorrect statement from the following? A. wells B. springs C. infiltration wellsD. storage reservoirs E. none of these
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…
The least thickness of class B cast iron (spun) pipe, is_________________? A. 7.2 mm B. 7.9 mmC. 8.6 mm D. 10 mm
By boiling water, hardness can be removed if it is due to_________________? A. calcium sulphate B. magnesium sulphate C. calcium nitrateD. calcium bicarbonate E. none of these
Asbestos pipes are ______________? A. light in weight and easy to transport B. highly resistant to corrosion C. high flexible to accommodate deflection upto 12° D. very much smooth and hydraulically efficientE. all the above
In distribution pipes, drain valves are provided at_______________? A. lower point B. higher point C. junction points D. any where