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The minimum number of filter beds in the slow sand filter is __________

(a) 1

(b) 2

(c) 3

(d) 3

This question was posed to me during a job interview.

My question comes from Slow Sand Filter topic in portion Filtration of Environmental Engineering

1 Answer

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Best answer
Right answer is (b) 2

The best explanation: The minimum number of filter beds provided in the slow sand filter is 2 where one unit is provided as stand by for an area of 20m^2.

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