Irrigation Engineering
According to Lacey, depth of scour in a river depends upon the straightness of the reach. If D is the depth of scour in regime flow in a right angled bend, it is

2.00 D
1.75 D
1.25 D
1.50 D

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Irrigation Engineering
A deep well

has more discharge than a shallow well
is weaker structurally than a shallow well
both (A) and (B)
is always deeper than a shallow well

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