If 2% solution of a sewage sample is incubated for 5 days at 20°C and depletion of oxygen was found to be 5 ppm, B.O.D. of the sewage is____________________?

Related Mcqs:

For treating the sewage of a large city, you will recommend_________________?

A. A sedimentation tank and an activated sludge treatment plant B. A plant consisting of Imhoff tanks with low rate trickling filters C. Sedimentation tanks with high rate trickling filters D. None of these...

The arrangement made for passing the sewer line below an obstruction below the hydraulic gradient lines called ____________________?

A. Inverted syphon B. Depressed sewer C. Sag pipe D. all of these...

For design purposes, the normal rate of infiltration of ground water into the sewer, is___________________?

A. 500 litres/km/cm B. 1000 litres/km/cm C. 1500 litres/km/cm D. 2000 litres/km/cm...

The most dangerous pollutant in vehicular emissions is____________________?

A. CO B. SO2 C. CO2 D. O3...

pH value of sludge during alkaline regression stage, is__________________?

A. More than 7 B. Less than 7 C. Less than 6 D. More than 6...