Correct answer
D. specific gravity
Explanation
The correct answer is specific gravity.
In a trickling filter________?
If is the rugosity coefficient, is the bed slope of sewer, the velocity of flow in m/sec may be obtained by the formula V = (1/n) r2/3 s1/2 evolved by________?
If 2% solution of a sewage sample is incubated for 5 days at 20°C and depletion of oxygen was found to be 5 ppm, B.O.D. of the sewage is________?
The order of booking dimensions is________?
The most suitable chemical which can be applied to the water surface for reducing evaporation is________?
Closed contours, with higher value inwards, represent a________?