A. 7 years
B. 14 years
C. 21 years
D. 28 years
E. 35 years
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Related Mcqs:
- 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 litres E. 135 litres...
- The yield of a rapid gravity filter as compared to that of slow sand filter, is__________________?
- A. 10 times B. 15 times C. 20 times D. 30 times E. 35 times...
- The underground sources of water, is from______________?
- Pick up the incorrect statement from the following? A. wells B. springs C. infiltration wells D. storage reservoirs E. none of these...
- The maximum depth of sedimentation tanks is limited to________________?
- A. 2 m B. 3 m C. 4 m D. 5 m E. 6 m...
- Corrosion of well pipes may not be reduced by_________________?
- A. reducing the draw down and the pumping rate B. reducing the flow velocity C. using thicker pipes D. using screens having larger area of openings E. none of these...
- Biochemical Oxygen Demand (B.O.D.) of safe drinking water must be________________?
- A. nil B. 5 C. 10 D. 15 E. 20...
- In distribution pipes, drain valves are provided at_______________?
- A. lower point B. higher point C. junction points D. any where...
- 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 efficient E. all the above...
- Aeration of water is done to remove______________?
- A. odour B. colour C. bacterias D. hardness E. turbidity...
- 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 litres B. 2880 kilo litres C. 3880 kilo litres D. 4880 kilo litres...
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