Q. Hydraulic mean radius is

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Q. Sewer ventilating columns are generally placed at

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Q. In case of Imhoff tanks,

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Q. If the depth of partial flow in a sewer of diameter 2 m, is 50 cm, its wetted perimeter is

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Q. A drop manhole is provided if

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Q. In a city the ratio of the drainage to sewage is 20, the percentage discharge passing through non-monsoon periods, is

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Q. In septic tanks,

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Q. The sewer pipe which carries sewage from a building for immediate disposal is

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Q. The algae dies out in the zone of

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Q. The recommended detention period for grit chambers is

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Q. Pick up the correct statement from the following :

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Q. Pick up the correct statement from the following :

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Q. The liquid wastes from kitchens, bath rooms and wash basins, is not called

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Q. The presence of free ammonia in sewage, is detected by

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Q. The amount of oxygen consumed by the aerobic bacterias which cause the aerobic biological decomposition of sewage, is known

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Q. The standard B.O.D. of water is taken for

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Q. The digested sludge from septic tanks, is removed after a maximum period of

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Q. For providing an Indian type W.C., the R.C.C. slabs in the toilet portion

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Q. The gradient of sewers depends upon

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Q. The settling velocity of the particles larger than 0.06 mm in a settling tank of depth 2.4 is 0.33 m per sec. The detention period recommended for the tank, is

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