GATE Infrastructure, Services and Utilities: Waste water treatment – Previous Year Questions

3 GATE previous year questions on Waste water treatment (Infrastructure, Services and Utilities, Architecture and Planning) with answers and explanations, from every paper.

1. GATE 2021 AR Q53 (2 marks, Multiple select) – Which statements describe the activated-sludge process?
2. GATE 2024 AR — Planning Q18 (1 mark, Multiple choice) – Which is correct for an oxidation pond treating wastewater?
3. GATE 2024 AR — Architecture Q18 (1 mark, Multiple choice) – Which is correct for an oxidation pond treating wastewater?