Sand Filter Test – 1

1. The minimum number of filter beds in the slow sand filter is __________

2. The thickness of the base material on which filter media are supported is __________

3. When the fineness of sand increases __________

4. The depth of an enclosed tank of a slow sand filter lies in the range of ______

5. What is the frequency of cleaning of a slow sand filter?

6. What is the maximum filter head up to which slow sand filters are worked upon?

7. The slow sand filter is efficient in removing turbidity of water.

8. The slow sand filter is able to remove ______ % of bacteria in water.

9. The slow sand filter is designed for _____________

10. The maximum daily demand of a city is 24*10⁵ and the rate of filtration is 100 per litre per hour per m². What is the area of the filter?