Soil Mechanics and Foundation Engineering problems
- 1. Pick up the correct statement from the following:
Options- A. A maximum value of dry density is obtained at optimum water content
- B. At low value of water content most soils tend to be stiff.
- C. At high water content, the dry density decreases with an increase of water content.
- D. An airless soil will have maximum possible value of dry density for the given water content
- E. All the above. Discuss
Correct Answer: All the above.
- 2. A pycnometer is used to determine
Options- A. voids ratio
- B. dry density
- C. water content
- D. density index. Discuss
Correct Answer: water content
- 3. Stoke's law does not hold good if the size of particle is smaller than
Options- A. 0.0002 mm
- B. 0.002 mm
- C. 0.02 mm
- D. 0.2 mm Discuss
Correct Answer: 0.0002 mm
- 4. Plasticity index is defined as the range of water content between
Options- A. liquid and plastic limit
- B. plastic limit and semi solid limit
- C. semi-solid limit and liquid limit
- D. liquid limit and solid limit. Discuss
Correct Answer: liquid and plastic limit
- 5. The shear strength in plastic undrained clay, is due to
Options- A. inter-granular friction
- B. internal friction
- C. cohesion
- D. none of these. Discuss
Correct Answer: cohesion
- 6. In non-cohesive soil in passive state of plastic equilibrium
Options- A. major principal stress is horizontal
- B. minor principal stress is vertical
- C. major principal stress is vertical
- D. minor and major principal stresses are equally inclined to the horizontal. Discuss
Correct Answer: minor principal stress is vertical
- 7. According to IS : 2720 - 1965, the composition of a dispersing solution used in pipette analysis for determining the size of particles, is
Options- A. sodium-hexametaphosphate 33 g, sodium carbonate 7 g and distilled water one litre
- B. sodium-hexametaphosphate 7 g, sodium carbonate 33 g and distilled water one litre
- C. sodium-hexametaphosphate 23 g, sodium carbonate 17 g and distilled water one litre
- D. none of these. Discuss
Correct Answer: sodium-hexametaphosphate 33 g, sodium carbonate 7 g and distilled water one litre
- 8. The shear strength of a soil
Options- A. increases with an increase in the normal stress
- B. is proportional to the cohesion of the soil
- C. is generally known as the strength of the soil
- D. is proportional to the tangent of the angle of internal friction
- E. all the above. Discuss
Correct Answer: all the above.
- 9. The critical exist gradient of seepage water in soils, increases with
Options- A. an increase in specific gravity
- B. a decrease in specific gravity
- C. a decrease in void ratio
- D. both (a) and (c)
- E. none of these. Discuss
Correct Answer: both (a) and (c)
- 10. Pick up the correct statement from the following:
Options- A. The void ratio in soils is defined as the ratio of the volume of voids to the volume of solids
- B. The porosity of a soil is defined as the ratio of the volume of voids to the gross volume of the soil
- C. The bulk density of a soil is defined as the unit weight of the soil
- D. The dry density of a soil is defined as weight of solids to the total volume of the soil
- E. All the above. Discuss
Correct Answer: All the above.
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