UPSC Civil Service Exam Questions - Civil Engineering Questions and Answers

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Discussion :: UPSC Civil Service Exam Questions

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 :

1, 2, 4 and 6

2, 3 and 5

3, 4, 5 and 6

1, 3, 4 and 6

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