GATE 2025 ES – Question 42

Air and Noise Pollution · Air Quality Management · 2 marks · Multiple choice

1. Avoid PS/PE;furnace above 1000°C;bag filter.
2. Avoid PVC;rapidly cool flue gas through 400–250°C;activated-carbon treatment.
3. Avoid food waste;furnace above 900±50°C;electrostatic precipitator.
4. Avoid metal-bearing waste;flue gas above 1000°C;venturi scrubber.

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