Computer · Environmental Engineering
The cleaning interval (period) for a rapid sand filter is generally taken as:
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 11 to 3 months
- 21 to 3 days✓
- 31 to 3 weeks
- 41 to 3 hours
Correct answer
1 to 3 days
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