soil mechanics and foundation engineering MCQs – Page 5

Practise focused soil mechanics and foundation engineering questions with marked answers for exam preparation and subject revision.

soil mechanics and foundation engineering Mcqs

81. If a cohesive soil specimen is subjected to a vertical compressive load, the inclination of the cracks to the horizontal is__________________?
0

A. 22.5

B. 90

C. 45

D. 0

82. During the first stage of triaxial test when the cell pressure is increased from 0.10 N/mm2 to 0.26 N/mm2, the pore water pressure increases from 0.07 N/mm2 to 0.15 N/mm2. Skemptons pore pressure parameter B is___________________?
0

A. -0.5

B. 2.0

C. 0.5

D. 2

83. In the triaxial compression test, the application of additional axial stress (i.e. deviator stress) on the soil specimen produces shear stress on__________________?
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A. horizontal plane only

B. vertical plane only

C. both horizontal and vertical planes

D. all planes except horizontal and vertical planes

84. Coefficient of consolidation of a soil is affected by_______________?
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A. compressibility

B. permeability

C. both compressibility and permeability

D. none of the above

85. Inorganic soils with low compressibility are represented by_________________?
0

A. CH

B. SL

C. ML

D. MH

86. Select the correct statement?
0

A. coefficient of compressibility of an over-consolidated clay is greater than that of a normally consolidated clay

B. coefficient of compressibility is cons-tant for any clay

C. coefficient of compressibility of an over-consolidated clay is less than that of a normally consolidated clay

D. none of the above

87. The admixture of coarser particles like sand or silt to clay causes______________?
0

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

88. Select the incorrect statement ?
0

A. In a direct shear box test, the plane of shear failure is predetermined

B. Stress distribution on the failure plane in the case of triaxial compression test is uniform

C. Unconfined compression test can be carried out on all types of soils

D. Better control is achieved on the drainage of the soil in a triaxial compression test

89. If the degree of saturation of a partially saturated soil is 60%, then air content of the soil is______________?
0

A. 80%

B. 100%

C. 60%

D. 40%

90. The most suitable method for drainage of fine grained cohesive soils is________________?
0

A. deep well system

B. electroosmosis method

C. vacuum method

D. well ppint system

91. According to IS classification, the range of silt size particles is_________________?
0

A. 4.75 mm to 2.00 mm

B. 0.425 mm to 0.075 mm

C. 2.00 mm to 0.425 mm

D. 0.075 mm to 0.002 mm

92. If the volume of voids is equal to the volume of solids in a soil mass, then the values of porosity and voids ratio respectively are________________?
0

A. 1.0 and 0.5

B. 0.0 and 1.0

C. 0.5 and 1.0

D. 1.0 and 0.0

93. Which of the following statements is correct ?
0

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

94. Valid range for n, the percentage voids, is______________?
0

A. n<0

B. 0<n0

C. 0

95. The ultimate consolidation settlement of a structure resting on a soil_______________?
0

A. decreases with the increase in the initial voids ratio

B. increases with the decrease in the porosity of the soil

C. decreases with the decrease in the plastic limit

D. increases with the increase in the initial voids ratio

96. In hydrometer analysis for a soil mass______________?
0

A. both meniscus correction and dispersing agent correction are additive

B. both meniscus correction and dispersing agent correction are subtractive

C. meniscus correction is additive and dispersing agent correction is subtractive

D. meniscus correction is subtractive and dispersing agent correction is additive

97. Residual soils are formed by______________?
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A. none of the above

B. water

C. glaciers

D. wind

98. The maximum dry density upto which any soil can be compacted depends upon____________?
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A. moisture content only

B. amount of compaction energy only

C. both moisture content and amount of compaction energy

D. none of the above

99. The clay mineral with the largest swelling and shrinkage characteristics is_______________?
0

A. none of the above

B. montmorillonite

C. kaolinite

D. illite

100. The effect of cohesion on a soil is to______________?
0

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

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