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UPSC Civil Service Exam Questions

Q1: The spacing of tile drains to relieve water-logged land is directly proportional to the

A depth of drain below the ground surface

B depth of impervious strata from the drain

C depth of drain below the water level

D coefficient of permeability of the soil to be drained

ANS:D - coefficient of permeability of the soil to be drained

Spacing = 4k/q* (height of water table^2-depth of impervious strata^2).



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