Waste Water Engineering Bio-chemical oxygen demand (BOD) for the first 20 days in generally referred to All of these First stage demand Initial demand Carbonaceous demand All of these First stage demand Initial demand Carbonaceous demand ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering The effluent of a septic tank is As good as that from a complete treatment Foul and contains dissolved and suspended solids Fit for discharge into any open drain None of these As good as that from a complete treatment Foul and contains dissolved and suspended solids Fit for discharge into any open drain None of these ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering Sewer ventilating columns are generally placed at All listed here Every change in the size of sewers Distances 150 m to 300 m Upper ends of branch sewers All listed here Every change in the size of sewers Distances 150 m to 300 m Upper ends of branch sewers ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering Drop manholes at the junctions of sewer lines, are provided if 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 Invert level of a branch sewer is more than 60 cm that of the main sewer Sewer line runs along a main road ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering For the COD test of sewage, organic matter is oxidised by K₂Cr₂O₇ in the presence of H₂SO₄ HNO₃ HCl None of these H₂SO₄ HNO₃ HCl None of these ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering If a paper moistened with lead acetate for five minutes when placed in manhole turns black. The sewer certainly contains Carbon dioxide Oxygen Methane Hydrogen sulphide Carbon dioxide Oxygen Methane Hydrogen sulphide ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS