Q. Pick up the incorrect statement from the following :

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Q. Water may not contain much impurities if its source is

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Q. Manholes are less common in

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Q. Pick up the correct statement from the following :

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Q. While designing a water supply of an industrial township, industrial and commercial water demand of total supply, is assumed

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Q. The storage capacity of a reservoir may be divided into three zones. The lowest zone is

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Q. In a rapid gravity filter

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Q. Most important method for calculating discharge for planning a water supply project, is

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Q. Alkalinity in water may be caused due to

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Q. Open channels supported over tres-les, are generally known as

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Q. For least effect on the water table, the tube wells must be dug one in every

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Q. In plain sedimentation tanks under normal conditions, impurities are removed upto

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Q. Rapid sand filter

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Q. Pick up the correct statement from the following :

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Q. Rapid gravity filters can remove bacterial impurities up to a maximum of

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Q. Cast iron pipes

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Q. Run off is the quantity of water which flows

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Q. Efficiency of removing bacterias from raw water by a slow sand filter, is

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Q. De-chlorination is followed by

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Q. The bed slope in slow sand filters, is generally kept

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