Q25. | For a given discharge, efficiency of sedimentation tank can be increased by : |
Q26. | A city supply of 1500 cubic meters of water per day is treated with a chlorine dosage of 0.5 ppm. For this purpose, requirement of 25% bleaching powder per day would b e : |
Q27. | If annual average daily draft of water is 270 lpcd and population of the city is 2,00,000, then peak demand will be : |
Q28. | Under natural conditions of flow an unpolluted river would contain : |
Q29. | If volume of mixed liquor suspended solid is 1000 mg/l, and settled volume is 100 ml, what will be the sludge volume index ? |
Q30. | If volume of mixed liquor suspended solid is 1000 mg/l, and settled volume is 100 ml, what will be the sludge volume index ? |