If the diameter of a sewer is 150 mm, the gradient required for genera – McqOptions

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1.	If the diameter of a sewer is 150 mm, the gradient required for generating self cleansing velocity, is
A.	1 in 60
B.	1 in 100
C.	1 in 120
D.	none of these.
Answer» C. 1 in 120

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