The algae dies out in the zone of_____________________?

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...

A rain sanitary sewer is constructed to carry_________________ ?

A. Sanitary sewage B. Storm sewage C. Surface water D. Ground water...

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...