Correct answer
D. 1 in 120
Explanation
The correct answer is 1 in 120.
The normal value of over flow rates for plain primary sedimentation tanks, ranges between________?
The degree of kinematic indeterminacy of a pin-jointed space frame is________?
Clogging of sewers, is caused due to________?
The hydrometer method of sedimentation analysis differs from the pipette analysis mainly in________?
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________?
Relative density of a compacted dense sand is approximately equal to________?