Question

Arrange the following operations in correct order for treating raw surface water to make it suitable for drinking purpose:
A. Screening
B. Filtration
C. Sedimentation
D. Disinfection
Choose the correct answer from the options given below:

• A. A, D, C, B
• B. A, B, C, D
• C. A, C, D, B
• D. A, C, B, D

Hint:

Mnemonic: "S-S-F-D" -> Screening, Sedimentation, Filtration, Disinfection. Disinfection is almost always the final step to ensure residual protection in the pipes.

Answer 1

The Correct Option is D