Waste Water Engineering For the COD test of sewage, organic matter is oxidised by K₂Cr₂O₇ in the presence of HNO₃ None of these HCl H₂SO₄ HNO₃ None of these HCl H₂SO₄ ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering If the diameter of a sewer is 100 mm, the gradient required for generating self cleansing velocity is None of these 1 in 100 1 in 120 1 in 60 None of these 1 in 100 1 in 120 1 in 60 ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering A five day B.O.D. at 15°C of the sewage of a town is 100 kg/day. If the 5 day B.O.D. per head at 15°C for standard sewage is 0.1 kg/day, the population equivalent is 10000 1000 5000 100 10000 1000 5000 100 ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering The self-cleansing velocity of water flowing through pipe lines, is 1 metre/sec 0.25 metre/sec 2 metres/sec 0.5 metre/sec 1 metre/sec 0.25 metre/sec 2 metres/sec 0.5 metre/sec ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering ‘Cowl’ is provided at First step in manhole Upper end of ventilating column Upper end of the manhole Lower end of ventilating column First step in manhole Upper end of ventilating column Upper end of the manhole Lower end of ventilating column ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering A manhole is classified as shallow if its depth is between 0.7 to 0.9 m 0.9 to 1.20 m 0.5 to 0.7 m 0.4 to 0.5 m 0.7 to 0.9 m 0.9 to 1.20 m 0.5 to 0.7 m 0.4 to 0.5 m ANSWER DOWNLOAD EXAMIANS APP