GATE CE · 2026 · CE
Question 21: Water and Waste Water Quality and Treatment
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Question 21
CEMCQ1 markNeeds review
A rapid sand filter bed of depth 0.8 m has 40 % porosity during service cycle. It is recommended that during backwash operation, the expanded filter bed should have 70 % porosity. The uniform expanded depth (in m) of the filter bed during backwash is
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2026CE
GATE CE 2026 · Paper 1
Civil Engineering · Original paper archive
- Section
- Civil Engineering
- Question type
- Multiple choice (MCQ)
- Marks
- 1 mark
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