As per IS : 1172-1963, water required per head per day for average domestic purposes, is_______________? A. 50 litres B. 65 litres C. 85 litres D. 105 litresE. 135 litres
If four fires break out in a city of population 40 lakhs and if each hydrant has three streams and duration of each fire is four hours, the total quantity of water required, is______________________? A. 1880 kilo litresB. 2880 kilo…
Aeration of water is done to remove______________? A. odour B. colour C. bacterias D. hardness E. turbidity
Disinfection of drinking water, is done to remove_________________? A. odourB. bacterias C. turbidity D. colour
The expected discharge to be obtained from an open well sunk in coarse sand is 0.0059 cumec. If the working depression head of the well is 3 m, the minimum diameter of the well, is________________? A. 2 m B. 2.25…
Time of concentration________________? A. is the time taken, for precipitation B. duration of rainfall. C. time taken for all the ran off to reach the drainD. time taken for the storm water to travel from the most remote point to…
In slow sland filters, the turbidity of raw water can be removed only up to_________________? A. 60 mg/litre B. 75 mg/litre C. 100 gm/litre D. 150 mg/litre
Acidity in water is caused due to_______________? A. Mineral acids B. Free CO2 C. Iron sulphate D. Aluminium sulphateE. All the above
Corrosion of well pipes may not be reduced by_________________? A. reducing the draw down and the pumg rate B. reducing the flow velocity C. using thicker pipesD. using screens having larger area of openings E. none of these
The maximum depth of sedimentation tanks is limited to________________? A. 2 m B. 3 m C. 4 m D. 5 mE. 6 m