The dissolved oxygen level in natural unpolluted waters at normal temperature is found to be of the order of________________?

Related Mcqs:

The hourly variation factor is usually taken as______________?

A. 1.5 B. 1.8 C. 2.0 D. 2.7...

Percentage of bacterial load that can be removed from water by the process of plain sedimentation is about_______________?

A. 10 to 25 B. 50 C. 75 D. 100...

The relative stability of a sewage sample, whose dissolved oxygen is same as the total oxygen required to satisfy BOD, is______________?

A. 1 B. 100 C. infinite D. zero...

For the same solid content, if the quantity of sludge with moisture content of 98% is X, then the quantity of sludge with moisture content of 96% will be__________________?

A. X/4 B. X/2 C. X D. 2X...

For a country like India, where rainfall is mainly confined to one season, the suitable sewerage system will be________________?

A. separate system B. combined system C. partially combined system D. partially separate system...