If the depletion of oxygen is found to be 5 ppm after incubating a 2.5% solution of sewage sample for 5 days at 21°C, B.O.D. of the sewage is_____________________?

Related Mcqs:

¾th or ¼th extra space is left in sewer pipes at maximum discharge for_________________?

A. Low estimates of the average and maximum flows B. Large scale infiltration of storm water C. Unexpected increase in population D. All the above...

In the activated sludge process__________________?

A. Aeration is continued till stability B. Aeration is done with an admixture of previously aerated sludge C. Sludge is activated by constant stirring D. Water is removed by centrifugal action...

The design period in years for pumping plants, is___________________?

A. 1 B. 2 to 3 C. 3 to 5 D. 5 to 10...

The algae dies out in the zone of_____________________?

A. Degradation B. Active decomposition C. Recovery D. Cleaner water...

hydraulically equivalent, the relationship which holds good, is _______________?

A. D8/3 = 4 b8/3 B. D3/8 = 4 b3/8 C. D2/3 = 4 b2/3 D. D3/2 = 4 b3/2...