After cleaning a slow sand filter, the filtered water is not used for – McqOptions

MCQOPTIONS

1.	After cleaning a slow sand filter, the filtered water is not used for
A.	6 hours to 12 hours
B.	12 hours to 18 hours
C.	18 hours to 24 hours
D.	24 hours to 36 hours
E.	48 hours.
Answer» E. 48 hours.

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