Soil Mechanics and Foundation
The total discharge from two wells situated near to each other is

equal to larger of the two discharges from individual wells
sum of the discharges from individual wells
greater than the sum of the discharges from individual wells
less than the sum of the discharges from individual wells

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Soil Mechanics and Foundation
The major principal stress in an element of cohesion-less soil within the backfill of a retaining wall is

Vertical if the soil is in an active state of plastic equilibrium
Inclined at 45° to the vertical plane
Vertical if the soil is in a passive state of plastic equilibrium
None of these

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