Question

What is the air scour rate which is provided before a water backwash?

a.

12 cum/ sqm h

b.

15 cum/ sqm h

c.

20 cum/ sqm h

d.

27 cum/ sqm h

Answer: (d).27 cum/ sqm h

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Q. What is the air scour rate which is provided before a water backwash?

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