Soil Mechanics and Foundation Engineering MCQ Questions and Answer - Set 22 - ObjectiveBooks

Soil Mechanics and Foundation Engineering MCQ Questions and Answer - Set 22

Practice Test: Question Set - 22

1. The void ratio of a soil sample decreases from 1.50 to 1.25 when the pressure is increased from 25 tonnes/m2 to 50 tonnes/m2, the coefficient of compressibility is
    (A) 0.01
    (B) 0.02
    (C) 0.05
    (D) 0.001

2. The coefficient of active earth pressure for loose sand having an angle of internal friction of 30° is
    (A) 1/3
    (B) 3
    (C) 1
    (D) 1/2

3. The maximum net pressure intensity causing shear failure of soil, is known
    (A) Safe bearing capacity
    (B) Net safe bearing capacity
    (C) Net ultimate bearing capacity
    (D) Ultimate bearing capacity

4. If the degree of saturation of a partially saturated soil is 60%, then air content of the soil is
    (A) 40 %
    (B) 60 %
    (C) 80 %
    (D) 100 %

5. Which one of the following statements is true?
    (A) Clays are more porous than sands
    (B) Pressure of organic matter in a soil decreases the bearing capacity of the soil
    (C) Aluminous cement is used for foundations in soils with chemical deposits
    (D) All the above

6. According to IS classification, the range of silt size particles is
    (A) 4.75 mm to 2.00 mm
    (B) 2.00 mm to 0.425 mm
    (C) 0.425 mm to 0.075 mm
    (D) 0.075 mm to 0.002 mm

7. Pick up the clay soil group which does not swell when wet from the following:
    (A) Kaolinite group
    (B) Mite group
    (C) Vermiculite group
    (D) Montrorillonite group

8. Coefficient of consolidation of a soil is affected by
    (A) Compressibility
    (B) Permeability
    (C) Both compressibility and permeability
    (D) None of the above

9. Pick up the correct statement from the following:
    (A) When water table is above the base of a footing, the dry weight m should be used for soil below water table
    (B) When water table is located somewhat below the base of a footing, the elastic wedge is partly of moist soil and partly of submerged soil, and a suitable reduction factor is used
    (C) When water table is just at the base of the footing, no reduction factor is used
    (D) None of these

10. Select the incorrect statement.
Effective angle of shearing resistance
    (A) Increases as the size of particles increases
    (B) Increases as the soil gradation improves
    (C) Is limited to a maximum value of 45°
    (D) Is rarely more than 30° for fine grained soil

11. The relationship between void ratio (e) and porosity ratio (n) is:
    (A) n = (1 + e )/(1 - e)
    (B) e = (1 + n)/(1 - e)
    (C) ne/(1 - e)
    (D) e = n/(1 - n)

12. Relative density of compacted dense sand is approximately equal to
    (A) 0.4
    (B) 0.6
    (C) 0.95
    (D) 1.20

13. Pick up the correct statement from the following:
    (A) To an agriculturist, soil is the substance existing on the earth's surface, which grows and develops plants
    (B) To a geologist, soil is the material in a relatively thin surface zone within which roots occur, and rest of the crust is termed as rock irrespective of hardness
    (C) To an engineer, soil is the unaggregated and uncemented deposits of minerals and organic particles covering the earth's crust
    (D) All the above

14. Inorganic soils with low compressibility are represented by
    (A) MH
    (B) SL
    (C) ML
    (D) CH

15. W is the weight of soil having a moisture content w. If V is the volume of proctor's mould, the dry density of the soil is
    (A) WV/(1 + w)
    (B) V/w (1 + w)
    (C) W/V(1 + w)
    (D) V (1 + w)/W

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