1.

If γw is the unit weight of water, r the hydraulic mean depth of the sewer and S the bed slope of the sewer, then the tractive force exerted by flowing water, is

A. γw . r . S
B. γw r1/2 . S
C. γw r S
D. γw r2/3 S
Answer» B. γw r1/2 . S


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