- A. a gradual increase in neutral pressure and a gradual decrease in effective pressure takes place and sum of the two is constant
- B. a gradual decrease in neutral pressure and a gradual increase in effective pressure takes place and sum of the two is constant
- C. both neutral pressure and effective pressure decrease
- D. both neutral pressure and effective pressure increase
Soil Mechanics and Foundation
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Within the consolidation process of a saturated clay_____.
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Select the incorrect statement.
- A. In a direct shear box test, the plane of shear failure is predetermined
- B. Better control is achieved on the drainage of the soil in a tri-axial compression test
- C. Stress distribution on the failure plane in the case of tri-axial compression test is uniform
- D. Unconfined compression test can be carried out on all types of soils
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Which one of the following clays behaves like a dense sand ?
- A. over-consolidated ciay with a high over-consolidation ratio
- B. over-consolidated clay with a low over-consolidation ratio
- C. normally consolidated clay
- D. under-consolidated clay
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The water content of soil, which represents the boundary between plastic state and liquid state, is known as_____.
- A. liquid limit
- B. plastic limit
- C. shrinkage limit
- D. plasticity index
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Select the correct statement.
- A. A uniform soil has more strength and stability than a non-uniform soil.
- B. A uniform soil has less strength and stability than a non-uniform soil.
- C. Uniformity coefficient does not affect strength and stability.
- D. Uniformity coefficient of a poorly graded soil is more than that of a well graded soil.
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Rise of water table in cohesionless soils upto ground surface reduces the net ultimate bearing capacity approximately by_____.
- A. 25%
- B. 50%
- C. 75%
- D. 90%
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Which of the following soils has more plasticity index ?
- A. sand
- B. silt
- C. clay
- D. gravel
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Bishop’s method of stability analysis_____.
- A. is more conservative
- B. neglects the effect of forces acting on the sides of the slices
- C. assumes the slip surface as an arc of a circle
- D. all of the above
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Select the incorrect statement.
- A. Bearing capacity of a soil depends upon the amount and direction of load.
- B. Bearing capacity of a soil depends on the type of soil.
- C. Bearing capacity of a soil depends upon shape and size of footing.
- D. Bearing capacity of a soil is indepen-dent of rate of loading.
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The admixture of coarser particles like sand or silt to clay causes_____.
- A. decrease in liquid limit and increase in plasticity index
- B. decrease in liquid limit and no change in plasticity index
- C. decrease in both liquid limit and plasticity index
- D. increase in both liquid limit and plasticity index
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