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 Sewage and Sewers  General Questions  Wastewater  Air Pollution  Filtration  Water Flow System  Sedimentation  Disinfection  Atmosphere and Greenhouse Gases  Treatment Methods  Pumps and Pumping  Solid Waste Management  Quality of Water  Acid Rain and Aerosols  Water Softening  Water Demand and Quantity  Unit Operations, Screening and Aeration

Unit Operations, Screening and Aeration on Environmental Studies related Questions and Answers - Page 3

Question 21 : In which unit operation, gases are released or absorbed in water?
1. Gas transfer
2. Ion transfer
3. Solute stabilization
4. Solids Transfer
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Question 22 : The elapsed time in gravity filter is 1sec. What is the height of fall in a single descent?
1. 4.4m
2. 4.9m
3. 8.8m
4. 9.8m
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