Presence of nitrogen and phosphorous in waste water discharged into lakes and ponds causes_______________?

Related Mcqs:

The effect of increase in carbon dioxide level of the atmosphere and its profound effect on our climate is called the ________________?

A. Catalytic conversion B. Green house effect C. Global warming D. Both B. and C....

Fine grit present in sewage is removed in the _____________ during sewage treatment?

A. Grit chamber B. Detritus tank C. Trickling filter D. Skimming tank...

Suspended solid present in the waste water generated in blast furnace gas cooling and cleaning plant is removed by__________________?

A. Biological oxygen pond B. Radial settling tank (thickener) using coagulant (lime & ferrous sulphate) C. Lagoons D. Filtration...

COD of raw municipal sewage may be in the range of about _____________ mg/litre?

A. 1-2 B. 5-10 C. 90-120 D. 1500-2500...

A considerable part of the harmful ultraviolet radiation of the sum does not reach the earth surface, because of the fact that, there is a layer of _____________ high above earth’s atmosphere, which absorbs it?

A. Hydrogen B. Carbon dioxide C. Ozone D. None of these...