Soil Mechanics and Foundation
A retaining wall 6m high supports a backfill with a surcharge angle of 10°. The back of the wall is inclined to the vertical at a positive batter angle of 5°. If the angle of wall friction is 7°, then the resultant active earth pressure will act at a distance of 2 m above the base and inclined to the horizontal at an angle of

12°
17°
7°
10°

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Soil Mechanics and Foundation
The admixture of coarser particles like sand or silt to clay causes

decrease in liquid limit and increase in plasticity index
decrease in both liquid limit and plasticity index
decrease in liquid limit and no change in plasticity index
increase in both liquid limit and plasticity index

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Soil Mechanics and Foundation
Coefficient of earth pressure at rest is

less than active earth pressure but greater than passive earth pressure
less than both the active and passive earth pressures
greater than both the active earth pressure and passive earth pressure
greater than active earth pressure but less than passive earth pressure

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