Waste Water Engineering
The screens are fixed

Parallel to the direction of flow
At an angle 30° to 60° to the direction of flow
None of these
Perpendicular to the direction of flow

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Waste Water Engineering
Skimming tanks are

Used to remove the grease and oil
Tanks provided with self- cleansing screens
Improved version of grit chambers
Those from which sludge is skimmed out

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