Waste Water Engineering In trickling filter, B.O.D. is reduced to 60 to 80% 80 to 90% 30 to 40% 40 to 60% 60 to 80% 80 to 90% 30 to 40% 40 to 60% ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering To prevent settling down of sewage both at the bottom and on the sides of a large sewer, self-cleaning velocity recommended for Indian conditions, is 0.50 m/sec 0.70 m/sec 0.75 m/sec 0.60 m/sec 0.50 m/sec 0.70 m/sec 0.75 m/sec 0.60 m/sec ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering For non-scouring velocity 5 m/sec, the type of sewers generally preferred to, is Stone ware sewers Glazed bricks sewers Cast iron sewers Cement concrete sewers Stone ware sewers Glazed bricks sewers Cast iron sewers Cement concrete sewers ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering The value of Chezy’s constant C = 157.6/(1.81 + K/ ) is used in Manning’s formula Chezy’s formula Bazin’s formula Kutter’s formula Manning’s formula Chezy’s formula Bazin’s formula Kutter’s formula ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering Drop manholes at the junctions of sewer lines, are provided if Sewer line runs along a main road Invert level of a branch sewer is more than 60 cm that of the main sewer Two sewer lines intersect Ordinary manhole cannot be built Sewer line runs along a main road Invert level of a branch sewer is more than 60 cm that of the main sewer Two sewer lines intersect Ordinary manhole cannot be built ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering 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 6 hours 4 hours 2 hours 8 hours 6 hours 4 hours 2 hours 8 hours ANSWER DOWNLOAD EXAMIANS APP
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