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UPSC Civil Service Exam Questions - Engineering

Q1:

Which of the following treatments reduce salinity of water
1. Flash mixing and sedimentation
2. Electrodialysis
3. Reverse osmosis
4. Freezing
5. Filtration
Select the correct answer using the codes given below:

A 1, 2, 3, 4 and 5

B 2, 3 and 4

C 1, 3 and 5

D 1, 2 and 4

ANS:B - 2, 3 and 4

1. Electrodialysis.
2. Boiling.
3. Reverse osmosis.
4. Freezing.