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11-06-2021 Filter

Q. The loss of head during cleaning operation of a rapid sand filter is __________

A. 15-30cm
B. 1-5cm
C. 10-20cm
D. 10-25cm

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Dapzoi Verified
Commented on 2021-06-11 15:51:45 (IST)
Answer: A

Explanation: When cleaned bed is put into operation, the loss of head through it is 15-30cm and it goes on increasing as impurities are arrested in filter media.