Soil Mechanics & Foundation Engineering

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Soil Mechanics & Foundation Engineering

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1. Rise of water table in cohesionless soils upto ground surface reduces the net ultimate bearing capacity approximately by

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2. The ratio of volume of voids to the total volume of soil mass is called

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3. The most suitable method for drainage of fine grained cohesive soils is

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4. A cylindrical specimen of saturated soil failed under an axial vertical stress of 100 kN/m2 when it was laterally un-confmed. The failure plane was inclined to the horizontal plane at an angle of 45°. The values of cohesion and angle of internal friction for the soil are respectively

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5. Which of the following methods is more suitable for the determination of permeability of clayey soil ?

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6. Sand particles are made of

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7. A soil has a bulk density of 22 kN/m3 and water content 10%. The dry density of soil is

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8. For proper field control, which of the following methods is best suited for quick determination of water content of a soil mass ?

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9. The angle that Coulomb’s failure envelope makes with the horizontal is called

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10. Terzaghi’s bearing capacity factors Nc, Nq and Nr are functions of

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11. Sensitivity of a soil can be defined as

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12. Direct measurement of permeability of the specimen at any stage of loading can be made

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13. Rankine’s theory of earth pressure assumes that the back of the wall is

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14. Valid range for S, the degree of saturation of soil in percentage is

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15. Which of the following soils has more plasticity index ?

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16. 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

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17. The average coefficient of permeability of natural deposits

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18. When the plastic limit of a soil is greater than the liquid limit, then the plasticity index is reported as

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19. Valid range for n, the percentage voids, is

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20. Contact pressure beneath a rigid footing resting on cohesive soil is

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21. The hydraulic head that would produce a quick condition in a sand stratum of thickness 1.5 m, specific gravity 2.67 and voids ratio 0.67 is equal to

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22. Select the incorrect statement. Effective angle of shearing resistance

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23. 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

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24. The rise of water table below the foundation influences the bearing capacity of soil mainly by reducing

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25. If the water content of a fully saturated soil mass is 100%, then the voids ratio of the sample is

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26. According to Atterberg, the soil is said to be of medium plasticity if the plasticity index PI is

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27. A retaining wall 6m high supports a backfill with a surcharge angle of 10°. The back of the wall is inclined to the vertical at a positive batter angle of 5°. If the angle of wall friction is 7°, then the resultant active earth pressure will act at a distance of 2 m above the base and inclined to the horizontal at an angle of

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28. Coefficient of consolidation of a soil is affected by

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29. At liquid limit, all soils possess

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30. Physical properties of a permeant which influence permeability are

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31. For better strength and stability, the fine grained soils and coarse grained soils are compacted respectively as

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32. Clay layer A with single drainage and coefficient of consolidation Cv takes 6 months to achieve 50% consolidation. The time taken by clay layer B of the same thickness with double drainage and coefficient of consolidation

Cv2  Cv2

\frac{{{\text{Cv}}}}{2} to achieve the same degree of consolidation is

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33. If the natural water content of soil mass lies between its liquid limit and plastic limit, the soil mass is said to be in

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34. If the material of the base of the Casagrande liquid limit device on which the cup containing soil paste drops is softer than the standard hard rubber, then

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35. Which of the following methods is best suited for determination of permeability of coarse-grained soils ?

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36. Uniformity coefficient of a soil is

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37. The value of compression index for a remoulded sample whose liquid limit is 50% is

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38. 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

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39. The total and effective stresses at a depth of 5 m below the top level of water in a swimming pool are respectively

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40. Dispersed type of soil structure is an arrangement comprising particles having

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41. The admixture of coarser particles like sand or silt to clay causes

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42. If the sand in-situ is in its densest state, then the relative density of sand is

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43. Which one of the following clays behaves like a dense sand ?

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44. Residual soils are formed by

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45. Select the correct range of density index, 1D

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46. Toughness index is defined as the ratio of

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47. The maximum dry density upto which any soil can be compacted depends upon

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48. If the permeability of a soil is 0.8 mm/sec, the type of soil is

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49. Degree of consolidation is

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50. In the plate loading test for determining the bearing capacity of soil, the size of square bearing plate should be

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51. A grillage foundation

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52. The total discharge from two wells situated near to each other is

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53. A tri-axial shear test is preferred to direct shear test, because

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54. The clay mineral with the largest swelling and shrinkage characteristics is

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55. The ultimate consolidation settlement of a soil is

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56. Within the consolidation process of a saturated clay

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57. In a deposit of normally consolidated clay

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58. Effective stress is

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59. In a triaxial compression test when drainage is allowed during the first stage (i. e. application of cell pressure) only and not during the second stage (i.e. application of deviator stress at constant cell pressure), the test is known as

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60. Voids ratio of a soil mass can

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61. The flownet for an earthen dam with 30 m water depth consists of 25 potential drops and 5 flow channels. The coefficient of permeability of dam material is 0.03 mm/sec. The discharge per meter length of dam is

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62. A normally consolidated clay settled 10 mm when effective stress was increased from 100 kN/m2 to 200 kN/m2. If the effective stress is further increased from 200 kN/m2 to 400 kN/m2 , then the settlement of the same clay is

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63. Coefficient of permeability of soil

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64. Due to a rise in temperature, the viscosity and the unit weight of the percolating fluid are reduced to 60% and 90% respectively.
If other things remain constant, the coefficient of permeability

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65. Coefficient of earth pressure at rest is

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66. Which of the following methods is most accurate for the determination of the water content of soil ?

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67. With the increase in the amount of compaction energy

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68. Unconfmed compressive strength test is

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69. Which of the following is a measure of particle size range ?

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70. For a loose sand sample and a dense sand sample consolidated to the same effective stress

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