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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Q. Hardness of water is caused due to

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Q. Flow through period, in sedimentation tanks, is

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Q. Normal values of overflow rate for plain sedimentation tank, is

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Q. If p is total internal pressure, d is diameter of pressure conduit and t is thickness of conduit, the Hoop's stress is

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Q. The force which develops in a pressure conduit supported on trestles, is

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Q. After cleaning a slow sand filter, the filtered water is not used for

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