GATE 2024 AR — Architecture – Question 20
Which sequences occur in conventional water treatment?
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Correct answer: (A) Coagulation → Flocculation → Sedimentation; (B) Sedimentation → Filtration → Disinfection
Explanation
Coagulation destabilises particles, flocculation grows settleable flocs, and sedimentation removes them. Filtration follows clarification and disinfection follows filtration. Thus A, B represent correct successive portions of the treatment train; C, D reverse key dependencies.