Soil Mechanics and Foundation Sheet 23
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1) Question.
For a sandy soil, the angle of internal friction is . If the major principal stress is at failure, the corresponding minor principal stress will be
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2) Question.
According to Terzaghi's equation, the bearing capacity of strip footing resting on cohesive soil per unit depth and unit width is
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3) Question.
In case of footings in sand, if the soil pressure distribution is triangular, the maximum soil pressure is......... the average soil pressure.
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4) Question.
The settlement of a footing in sandy soils is given by
[= Settlement of a plate in the bearing test, = Width of the plate, = Width of the footing
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5) Question.
The coefficient of passive earth pressure for cohesionless granular soils is given by
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6) Question.
The coefficient of active earth pressure for cohesionless granular soils is given by
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7) Question.
If the coefficient of passive earth pressure is 1/3, then the coefficient of active earth pressure is
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8) Question.
The coefficient of earth pressure at rest for sand compacted in layers is about the same as for stiff clay.
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9) Question.
The coefficient of earth pressure at rest for stiff clay is about
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10) Question.
The coefficient of earth pressure at rest for loose sand is......that of dense sand.
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11) Question.
Consider the following assumtions:
1. Failure occurs on a plane surface
2. Wall is smooth but not necessarily vertical.
3. Failure wedge is a rigid body.
Coulomb's theory of earth pressure is based on assumptions
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12) Question.
Consider the following limitations:
1. Can be performed only on purely cohesionless soils
2. Plane of failure is predetermined
3. There is virtually no control on drainage
4. Non-uniform distribution of stresses in the sample cannot be determined.
5. Principle stresses in the sample cannot be determined.
The limitation inherent in direct shear test include:
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13) Question.
Consider the following statements:
Clays which exhibit high activity
1. contain montmorllonte.
2. contain kaolinite.
3. have a high silt conent.
4. have a high plasticity index.
5. have a low plasticity index.
Of these statements
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14) Question.
Consider the following types of soil tests:
1. California bearing ratio
2. Consolidation
3. Unconfined compression
The soil tests required to be done in the case of undisturbed samples include
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15) Question.
Consider the following statements regarding settlement of foundations:
1. Differential settlement of foundation leads to structural damage to the superstructure.
2. In non-cohesive soils, the major components of settlement is due to consolidation.
3. Lowering of ground water table cotributes and settlement of foundations.
Of these statements
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16) Question.
The following refer to the stability analysis of an earth dam under idfferent conditions:
1. Stability of D/S slope during steady seepage
2. Stability of U/S slope during sudden drawdown
3. Stability of U/s and D/S slopes during construction
Of these statements
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17) Question.
The process by which a mass of saturated soil is caused by external forces to suddenly lose its shear strenth and to behave as a fluid is called
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18) Question.
The following index properties were determinated for four soils A, B, C and D
soil
property
A B C D Liquid limit 0.50 0.49
0.43
0.47
Plastic limit 0.23 0.17
0.21
0.26
Which of these soils contains more clay particles?
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