The ratio of oxygen available to the oxygen required for stabilisation of sewage is called the __________________?

Related Mcqs:

The upper layer of atmosphere is called the ____________________?

A. Stratosphere B. Troposphere C. Ionosphere D. None of these...

Threshold limit value (TLV) of CO in air is _____________ ppm?

A. 5 B. 50 C. 2000 D. 5000...

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...

TLV of ozone (O3) and phosgene (COCl2) in air is _______________ ppm?

A. 0.1 B. 25 C. 100 D. 1000...

Which of the following processes is involved in the biochemical treatment of sewage effluents ?

A. Oxidation B. Reduction C. Dehydration D. Fermentation...