Assertion A. : Discharging the effluents from the oxidation ponds just up stream of lakes or reservoirs is undesirable. Reason (R) : The discharged algae get settled in the reservoirs and cause anaerobic decomposition and other water qualities_________________?

Related Mcqs:

The drainage area of a town is 12 hectares. Its 40% area is hard pavement ( K = 0.85), the 40% area is unpaved streets (K = 0.20) and the remaining is wooded areas (K = 0.15). Assuming the time of concentration for the areas as 30 minutes and using the formula Ps = 900/(t + 60) the maximum run off is__________________?

A. 0.10 cumec B. 0.12 cumec C. 0.15 cumec D. 0.20 cumec...

In normal conditions, the period for sludge digestion, is_______________?

A. 10 days B. 20 days C. 30 days D. 60 days...

A cylindrical ejector having its height 2 m fills after every 10 minutes with a peak sewage discharge of 0.0157 cumec. The diameter of the ejector chamber, is_____________________?

A. 2.30 m B. 2.40 m C. 2.45 m D. 2.50 m...

Large diameter sewers subjected to external pressure alone, are reinforced ______________________?

A. Near the inner surface of the pipe B. Near the outer surface of the pipe C. Both A. and B. D. With elliptical cage...

House connections to the laterals is generally made by___________________?

A. R.C.C. B. P.C.C. C. Cast iron D. Glazed stonewares...