Question

Which of the following is correct regarding the cheapest filter material used in water treatment?

a.

Sand>Anthracite>Garnet sand

b.

Sand<Anthracite>Garnet sand

c.

Sand<Anthracite<Garnet sand

d.

Sand=Anthracite>Garnet sand

Answer: (a).Sand>Anthracite>Garnet sand

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Q. Which of the following is correct regarding the cheapest filter material used in water treatment?

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i. It should be free from clay or silt
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Q. When the fineness of sand increases __________

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

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