At what depth are the air diffusers placed in the grit chamber?

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Question

At what depth are the air diffusers placed in the grit chamber?

Options:

A . 0.6-0.9 m

B . 1-2 m

C . 0.1-0.4m

D . 0.45-0.6 m

Answer: Option D
Answer: (d).0.45-0.6 m

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