Q121
Open questionThe detention period for oxidation ponds is usually kept as
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Environmental Engineering
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Q122
Open questionIf the sewage contains grease and fatty oils, these are removed in
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Q123
Open questionThe design discharge for the separate sewer system shall be taken as
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Q124
Open questionThe design discharge for the combined sewer system shall be taken as
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Q125
Open questionThe major disadvantage of lime soda process of water softening is that
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Q126
Open questionAssertion A: Slow sand filters are more efficient in removal of bacteria than rapid sand filters.
Reason R: The sand used in slow sand filters is finer than that in rapid sand filters
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Reason R: The sand used in slow sand filters is finer than that in rapid sand filters
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Q127
Open questionWhich of the following sewers is preferred for combined system of sewage?
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Q128
Open questionThe settling velocity of a particle in a sedimentation tank increases if
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Q129
Open questionAir binding phenomena in rapid sand filters occur due to
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Q130
Open questionThe chemical most commonly used to increase speed of sedimentation of sewage is
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Q131
Open questionThe main disadvantage of oxidation pond is that
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Q132
Open questionThe hydraulic mean depth (HMD) for an egg-shaped sewer flowing two-third full is
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Q133
Open questionSettling velocity increases with
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Q134
Open questionTurbidity is measured on
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Q135
Open questionThe maximum discharge of a tube well is about
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Q136
Open questionWhen there is no recirculation of sewage, then recirculation factor is
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Q137
Open questionOn standard silica scale, the turbidity in drinking water should be limited to
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Q138
Open questionThe most commonly used sewer under culverts is
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Q139
Open questionGround water is usually free from
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Q140
Open questionThe layout of distribution system in which water flows towards the outer periphery is
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