Q. Pick up the correct statement from the following :

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Q. Pick up the incorrect statement from the following regarding fire hydrants

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Q. The specific retention is least in case of

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Q. B.O.D. of treated water should be

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Q. Manholes along the mains from the source to a city are provided at 500 m intervals in

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Q. The population growth curve is

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Q. Turbidity of raw water is a measure of

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Q. If V is total consumption of water in litres for a population of N individuals, per capita consumption or water allowance for the water supply Q, is given by

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Q. Water supply includes

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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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