If the diameter of a sewer is 150 mm, the gradient required for generating self cleansing velocity, is« Back to Previous Page
A. 1 in 60
B. 1 in 100
C. 1 in 120
D. none of these.
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B. 1 in 100 |
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B. 1 in 100 |
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B. 1 in 100 |
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