Soil Mechanics and Foundation Engineering

51. An unsaturated 100 cm³ sample of soil weighs 190 g. If its dried weight is 160 g, water content of the soil, is

1. 0.188
2. 0.288
3. 0.388
4. 0.588

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52. At liquid limit, all soils possess

1. Same shear strength of small magnitude
2. Same shear strength of large magnitude
3. Different shear strengths of small magnitude
4. Different shear strengths of large magnitude

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53. Back fill with a sloping surface exerts a total active pressure Pa on the wall of height H and acts at

1. H/4 above the base parallel to base
2. H/2 above the base parallel to base
3. H/3 above the base parallel to base
4. H/5 above the base parallel to base

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54. Bishop's method of stability analysis

1. Is more conservative
2. Neglects the effect of forces acting on the sides of the slices
3. Assumes the slip surface as an arc of a circle
4. All of the above

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55. Buoyant unit weight equals the saturated density

1. Multiplied by unit weight of water
2. Divided by unit weight of water
3. Plus unit weight of water
4. Minus unit weight of water

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56. Chemical weathering of soil is caused due to

1. Oxidation
2. Carbonation
3. Hydration
4. All the above

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57. Coarse grained soils are best compacted by a

1. Drum roller
2. Rubber tyred roller
3. Sheep's foot roller
4. Vibratory roller

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58. Coefficient of compressibility is

1. Constant for any type of soil
2. Different for different types of soils and also different for a soil under different states of consolidation
3. Different for different types of soils but same for a soil under different states of consolidation
4. Independent of type of soil but depends on the stress history of soil

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59. Coefficient of consolidation for clays normally

1. Decreases with increase in liquid limit
2. Increases with increase in liquid limit
3. First increases and then decreases with increase in liquid limit
4. Remains constant at all liquid limits

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60. Coefficient of consolidation of a soil is affected by

1. Compressibility
2. Permeability
3. Both compressibility and permeability
4. None of the above

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