Waste Water Engineering If the depletion of oxygen is found to be 2.5 mg/litre after incubating 2.5 ml of sewage diluted to 250 ml for 5 days at 20°C, B.O.D. of the sewage is 250 mg/l 50 mg/l 150 mg/l 100 mg/l 250 mg/l 50 mg/l 150 mg/l 100 mg/l ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering In sewers the velocity of flow should not be Less than the self-cleansing velocity Less than 10 m/sec More than 20 m/sec More than the self-cleansing velocity Less than the self-cleansing velocity Less than 10 m/sec More than 20 m/sec More than the self-cleansing velocity ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering Primary treatment of sewage consists of removal of Oil and grease Floating materials Sand and girt Large suspended organic solids Oil and grease Floating materials Sand and girt Large suspended organic solids ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering For detecting the nitrites in the sewage, the matching colour may be developed by adding Phenol-di -sulphuric acid potassium hydroxide Sulphuric acid and napthamine None of these Potassium permanganate Phenol-di -sulphuric acid potassium hydroxide Sulphuric acid and napthamine None of these Potassium permanganate ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering The spacing of bars for perforations in coarse screens used for the treatment of sewage, is 20 mm 50 mm 30 mm 40 mm 20 mm 50 mm 30 mm 40 mm ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering The most dangerous pollutant in vehicular emissions is CO₂ O₂ SO₂ CO₂ CO₂ O₂ SO₂ CO₂ ANSWER DOWNLOAD EXAMIANS APP
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