Q. Sewer manholes are generally provided at

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Q. The sewers

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Q. Before discharging the foul sewage into rivers, it is generally treated by

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Q. The settlement of a particle in sedimentation tank, is affected by

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Q. If the length of overland flow from the critical point to the mouth of drain is 13.58 km and difference in level between the critical point and drain mouth is 10 m, the inlet time is

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Q. Oxidation process results in the formation of

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Q. Dry weather flow is :

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Q. As compared to fresh river water, sea water contains oxygen

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Q. Sewer pipes need be checked for

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Q. If D.O. concentration falls down to zero in any natural drainage, it indicates the zone of

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Q. The ratio of design discharge to the surface area of a sedimentation tank is called

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Q. In the activated sludge process

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Q. The settlement velocity of a solid (diameter 0.5 mm, specific gravity 1.75) in water having temperature 10°C, is

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Q. In detritus tanks,

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Q. The width of a settling tank with 2 hour detention period for treating sewage 378 cu m per hour, is

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Q. In areas where rainy season is limited to a few months, the type of sewerage system recommended is

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Q. Drop manholes are the manholes

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Q. The laying of sewers is done with

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Q. The rational formula for peak drainage discharge, was evolved by

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Q. The sewage treatment in septic tanks is due to

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