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

1.75 D
1.25 D
1.50 D
2.00 D

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Irrigation Engineering
Effective precipitation for a crop may be defined as

Total precipitation minus the loss due to infiltration
Total precipitation minus the loss due to evaporation
Total precipitation during the crop period
Available water stored in soil within root zone of the crop

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Irrigation Engineering
Infiltration rate is always

less than the infiltration capacity
equal to or more than the infiltration capacity
equal to or less than the infiltration capacity
more than the infiltration capacity

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