Civil Engineering - Water Supply Engineering - Discussion

34. 

A slow sand filter is cleaned if its filter head is higher than

[A]. 10 cm to 20 cm
[B]. 20 cm to 40 cm
[C]. 40 cm to 70 cm
[D]. 70 cm to 120 cm
[E]. 120 cm to 150 cm.

Answer: Option D

Explanation:

No answer description available for this question.

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