A grillage foundation
A. Is provided for heavily loaded isolated columns
B. Is treated as spread foundation
C. Consists of two sets of perpendicularly placed steel beams
D. All the above
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Residual soils are formed by
A. glaciers
B. wind
C. water
D. none of the above
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A 600 mm square bearing plate settles by 15 mm in plate load test on a cohesionless soil under an intensity of loading of 0.2 N/ram2 . The settlement of a prototype shallow footing 1 m square under the same intensity of loading is
A. 15 mm
B. Between 15 mm and 25 mm
C. 25 mm
D. Greater than 25 mm
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A 300 mm square bearing plate settles by 15 mm in a plate load test on a cohesive soil when the intensity of loading is 0.2 N/mm2 . The settlement of a prototype shallow footing 1 m square under the same intensity of loading is
A. 15 mm
B. 30 mm
C. 50 mm
D. 167 mm
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The angle that Coulomb’s failure envelope makes with the horizontal is called
A. cohesion
B. angle of internal friction
C. angle of repose
D. none of the above
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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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Which of the following soils has more plasticity index ?
A. sand
B. silt
C. clay
D. gravel
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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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Coefficient of permeability of soil
A. does not depend upon temperature
B. increases with the increase in temperature
C. increases with the decrease in temperature
D. none of the above
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The ultimate consolidation settlement of a soil is
A. directly proportional to the voids ratio
B. directly proportional to the compression index
C. inversely proportional to the compression index
D. none of the above
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Which of the following statements is correct?
A. Uniformity coefficient represents the shape of the particle size distribution curve.
B. For a well graded soil, both uniformity coefficient and coefficient of curvature are nearly unity.
C. A soil is said to be well graded if it has most of the particles of about the same size
D. none of the above
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In a consolidated drained test on a normally consolidated clay, the volume of the soil sample during shear
A. decreases
B. increases
C. remains unchanged
D. first increases and then decreases
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The effect of cohesion on a soil is to
A. reduce both the active earth pressure intensity and passive earth pressure intensity
B. increase both the active earth pressure intensity and passive earth pressure intensity
C. reduce the active earth pressure in-tensity but to increase the passive earth pressure intensity
D. increase the active earth pressure in-tensity but to reduce the passive earth pressure intensity [GATE 99]
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The hydrometer method of sedimentation analysis differs from the pipette analysis mainly in
A. the principle of test
B. the method of taking observations
C. the method of preparation of soil suspension
D. all of the above
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Rise of water table above the ground surface causes
A. Equal increase in pore water pressure and total stress
B. Equal decrease in pore water pressure and total stress
C. Increase in pore water pressure but decrease in total stress
D. Decrease in pore water pressure but increase in total stress
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Shear strength of a soil is a unique function of
A. effective stress only
B. total stress only
C. both effective stress and total stress
D. none of the above
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If the degree of saturation of a partially saturated soil is 60%, then air content of the soil is
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Water content of soil can
A. never be greater than 100 %
B. take values only from 0 % to 100 %
C. be less than 0 %
D. be greater than 100 %
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Compressibility of sandy soils is
A. almost equal to that of clayey soils
B. much greater than that of clayey soils
C. much less than that of clayey soils
D. none of the above
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A fully saturated soil is said to be
A. one phase system
B. two phase system with soil and air
C. two phase system with soil and water
D. three phase system
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