Waste Water Engineering

Q1: If the depth of flow in a circular sewer is 1/4th of its diameter D, the wetted perimeter is

A

B

C

D πD.

ANS:C -

If the depth of flow in a circular sewer is 1441​ of its diameter D, then the depth of flow y can be expressed as D/4​. The wetted perimeter P of a circular sewer is given by the formula: P=πD+2y Substituting the value of y=D/4​, we get: P=πD+2(D/4​) P=πD+D/2 P=(π+1/2​)D



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