GATE CE · 2026 · CE
Question 42: Water and Waste Water Quality and Treatment
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Question 42
CEMCQ2 marksNeeds review
The 2.4 ml of raw sewage is diluted to 240 ml. The Dissolved Oxygen (DO) of the diluted sample at the beginning of Biochemical Oxygen Demand (BOD) test was 8 mg/l and it was 6 mg/l after 5-day incubation at 20 °C.
The BOD₅ (in mg/l) of the raw sewage is
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2026CE
GATE CE 2026 · Paper 2
Civil Engineering · Original paper archive
- Section
- Civil Engineering
- Question type
- Multiple choice (MCQ)
- Marks
- 2 marks
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