Maximum permissible velocity 1.5 m/sec, is adopted in drains – McqOptions

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1.	Maximum permissible velocity 1.5 m/sec, is adopted in drains
A.	with beds of rocks and gravels
B.	lined with stones
C.	both (a) and (b)
D.	neither (a) nor (b).
Answer» D. neither (a) nor (b).

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