Q. The maximum permissible nitrites in public water supplies, is

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Q. A high velocity of wash water is required for

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Q. In distribution pipes, drain valves are provided at

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Q. Corrosion of well pipes may not be reduced by

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Q. Surge tanks are used

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Q. As per IS : 1172-1963, water required per head per day for average domestic purposes, is

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Q. In slow sland filters, the turbidity of raw water can be removed only up to

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Q. Biochemical Oxygen Demand (B.O.D.) of safe drinking water must be

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Q. Acidity in water is caused due to

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Q. At the socket and spigot joint,

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Q. Gravity conduits for carrying water from the source are

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Q. Continuous flow of water can be expected from

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Q. The maximum hourly consumption, is generally taken as

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Q. A city supply includes

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Q. During treatment of water, sedimentation is done

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Q. E. Coli bacterias die in water having pH greater than

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Q. Check valves are installed

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Q. If intensity of rainfall in cm per hour is I, percentage coefficient of run-off is P, area of catchment in square kilometres is A, the total run-off Q, is given by

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Q. Pick up the correct statement from the following :

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Q. Surface water is obtained from

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