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UPSC Civil Service Exam Questions

Q1:

According to the theory of filtration in water treatment, which of the following mechanisms come into play when water is filtered through a filter bed ?
1. Mechanical straining
2. Capillary action
3. Centrifugal force
4. Electro kinetic phenomenon
5. Osmotic force
6. Bacteriological action
Select the correct answer using the code given below :

A 1, 2, 4 and 6

B 2, 3 and 5

C 3, 4, 5 and 6

D 1, 3, 4 and 6

ANS:A - 1, 2, 4 and 6

Electrolysis, Reverse Osmosis.



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