For the survival of fish in a river stream, the minimum dissolved oxygen is prescribed________________?

Related Mcqs:

Pick up the correct statement from the following ?

A. Small sewers are cleaned by flushing B. Medium sewers are cleaned by cane rodding C. Medium sewers may be cleaned by pills D. All the above...

If the discharge of a sewer running half is 628 1.p.s., i = 0.001, and n = 0.010, the diameter of the sewer, is__________________?

A. 1.39 m B. 1.49 m C. 1.59 m D. 1.69 m...

The ratio of maximum sewage flow to average sewage flow for trunk mains having diameters more than 1.25 m, is____________________?

A. 1.5 B. 2.0 C. 3.0 D. 4.0...

Sewer pipes need be checked for_________________?

A. Minimum flow B. Maximum flow C. Both A. and B. D. None of these...

In a sludge digestion tank if the moisture content of sludge V1 litres is reduced from p1 % to p2 % the volume V2 is____________________?

A. [(100 + P1)/(100 – P2)] V1 B. [(100 – P1)/(100 + P2)] V1 C. [(100 – P1)/(100 – P2)] V1 D. [(100 + P2)/(100 – P1)] V1...