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The thickness of the base material on which filter media are supported is __________

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in Environmental Engineering by (81.4k points)
The thickness of the base material on which filter media are supported is __________

(a) 10-100cm

(b) 20-80cm

(c) 30-75cm

(d) 10-30cm

I had been asked this question in an interview for job.

Query is from Slow Sand Filter in section Filtration of Environmental Engineering

1 Answer

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Best answer
Right choice is (c) 30-75cm

The best I can explain: The base material consists of 30-75 cm thick gravel bed which is laid in layers of 15 cm with finer topmost layer and coarser bottom layer.

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