Waste Water Engineering If a 2% solution of sewage sample is incubated for 5 days at 20°C and the dissolved oxygen depletion was found to be 8 mg/l. The BOD of the sewage is 200 mg/l 300 mg/l 100 mg/l 400 mg/l 200 mg/l 300 mg/l 100 mg/l 400 mg/l ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering A safety lamp when inserted in the upper portion of a manhole causes flames. It indicates the presence of Hydrogen sulphide gas Carbondioxide gas Methane gas Petrol vapours Hydrogen sulphide gas Carbondioxide gas Methane gas Petrol vapours ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering The gradient of sewers depends upon Discharge All listed here Diameter of the sewer Velocity of flow Discharge All listed here Diameter of the sewer Velocity of flow ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering The grit chambers of sewage treatment plants, are generally cleaned after 7 days 12 days 2 days 14 days 7 days 12 days 2 days 14 days ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering For the COD test of sewage, organic matter is oxidised by K₂Cr₂O₇ in the presence of None of these HCl H₂SO₄ HNO₃ None of these HCl H₂SO₄ HNO₃ ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering Removal of oil and grease from sewage, is known Skimming Filtration None of these Screening Skimming Filtration None of these Screening ANSWER DOWNLOAD EXAMIANS APP
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