Waste Water Engineering The spacing of bars of perforations of fine screens used for the treatment of sewage, is 8 to 10 mm 2 to 3 mm 5 to 8 mm 3 to 5 mm 8 to 10 mm 2 to 3 mm 5 to 8 mm 3 to 5 mm ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering To test chemical oxygen demand (C.O.D.) of sewage, organic matter is oxidised by potassium dichromate in the presence of Hydrochloric acid Citric acid Nitric acid Sulphuric acid Hydrochloric acid Citric acid Nitric acid Sulphuric acid ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering In trickling filter, B.O.D. is reduced to 60 to 80% 40 to 60% 80 to 90% 30 to 40% 60 to 80% 40 to 60% 80 to 90% 30 to 40% ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering Drop manholes at the junctions of sewer lines, are provided if Invert level of a branch sewer is more than 60 cm that of the main sewer Sewer line runs along a main road Ordinary manhole cannot be built Two sewer lines intersect Invert level of a branch sewer is more than 60 cm that of the main sewer Sewer line runs along a main road Ordinary manhole cannot be built Two sewer lines intersect ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering In sewers the gas generally found, is All listed here Methane (CH4) Carbon dioxide (CO2) Hydrogen sulphide (H2S) All listed here Methane (CH4) Carbon dioxide (CO2) Hydrogen sulphide (H2S) ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering Imhoff cone is used to determine None of these Suspended solids Dissolved solids Settleable solids None of these Suspended solids Dissolved solids Settleable solids ANSWER DOWNLOAD EXAMIANS APP
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