McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: Civil Engineering .
| 51. |
Plasticity index is defined as the range of water content between |
| 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 |
| Answer» A. Liquid and plastic limit | |
| 52. |
Bishop's method of stability analysis |
| A. | Is more conservative |
| B. | Neglects the effect of forces acting on the sides of the slices |
| C. | Assumes the slip surface as an arc of a circle |
| D. | All of the above |
| Answer» C. Assumes the slip surface as an arc of a circle | |
| 53. |
You are given a sample of soil containing coarse grains to determine its water content, you will use |
| A. | Pycnometer |
| B. | Oven-drying method |
| C. | Calcium carbide method |
| D. | Alcohol method |
| Answer» A. Pycnometer | |
| 54. |
Pick up the incorrect definition from the following: |
| A. | Ratio of the compressive strength of unconfined undisturbed soil to that of remoulded soil, is known as the sensitivity of the soil sample |
| B. | The rotation of soil particles into stable state while remoulding, is known as the thiostropy of soil |
| C. | The water content at which a soil flows, is known plastic limit of the soil |
| D. | None of these |
| Answer» D. None of these | |
| 55. |
A 600 mm square bearing plate settles by 15 mm in plate load test on a cohesion-less 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 |
| A. | 15 mm |
| B. | Between 15 mm and 25 mm |
| C. | 25 mm |
| D. | Greater than 25 mm |
| Answer» B. Between 15 mm and 25 mm | |
| 56. |
The angle between the directions of the failure and the major principal plane, is equal to |
| A. | 90° + effective angle of shearing resistance |
| B. | 90° + half of the angle of shearing resistance |
| C. | 45° - half of the angle of shearing resistance |
| D. | 45° + half of the angle of shearing resistance |
| Answer» D. 45° + half of the angle of shearing resistance | |
| 57. |
In active state of plastic equilibrium in a non cohesive soil with horizontal ground surface |
| 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 horizontal |
| Answer» C. Major principal stress is vertical | |
| 58. |
Residual soils are formed by |
| A. | Glaciers |
| B. | Wind |
| C. | Water |
| D. | None of the above |
| Answer» D. None of the above | |
| 59. |
A soil not fully consolidated under the existing over-burden pressure, is called |
| A. | Pre-consolidated |
| B. | Normally consolidated |
| C. | Over-consolidated |
| D. | None of these |
| Answer» C. Over-consolidated | |
| 60. |
Pick up the correct statement from the following: |
| A. | Illite bond is weaker than Kaolinite bond |
| B. | Illite bond is stronger than montmorillonite bond |
| C. | Illite does not swell when wet |
| D. | All the above |
| Answer» D. All the above | |
| 61. |
If Cv is the coefficient of consolidation,t is the time and d is drainage path of one dimensional consolidation of soil, the time factor Tv, is given by |
| A. | Tv = d²/Cvt |
| B. | Tv = t²/d²Cv |
| C. | Tv = Cv3/d²t |
| D. | Tv = Cvt/dt² |
| Answer» D. Tv = Cvt/dt² | |
| 62. |
Select the correct statement. |
| A. | Unit weight of dry soil is greater than unit weight of wet soil |
| B. | For dry soils, dry unit weight is less than total unit weight |
| C. | Unit weight of soil increases due to submergence in water |
| D. | Unit weight of soil decreases due to submergence in water |
| Answer» D. Unit weight of soil decreases due to submergence in water | |
| 63. |
The bearing capacity of a soil depends upon |
| A. | Size of the particles |
| B. | Shape of the particles |
| C. | Cohesive properties of particles |
| D. | All the above |
| Answer» D. All the above | |
| 64. |
Pick up the correct statement from the following: |
| A. | The void ratio in soils is defined as the ratio of the volume of voids to the volume of solids |
| B. | The bulk density of a soil is defined as the unit weight of the soil |
| C. | The dry density of a soil is defined as weight of solids to the total volume of the soil |
| D. | All the above |
| Answer» D. All the above | |
| 65. |
If the water content of a fully saturated soil mass is 100%, then the voids ratio of the sample is |
| A. | Less than specific gravity of soil |
| B. | Equal to specific gravity of soil |
| C. | Greater than specific gravity of soil |
| D. | Independent of specific gravity of soil |
| Answer» B. Equal to specific gravity of soil | |
| 66. |
If water content of a soil is 40%, G is 2.70 and void ratio is 1.35, the degree of saturation is |
| A. | 70 % |
| B. | 75 % |
| C. | 80 % |
| D. | 85 % |
| Answer» C. 80 % | |
| 67. |
Stoke's law is valid only if the size of particle is |
| A. | Less than 0.0002 mm |
| B. | Greater than 0.2 mm |
| C. | Between 0.2 mm and 0.0002 mm |
| D. | All of the above |
| Answer» C. Between 0.2 mm and 0.0002 mm | |
| 68. |
Pick up the correct statement applicable to plate load test |
| A. | Width of the test pit for plate load test is made five times the width of the plate |
| B. | At the centre of the test pit, a hole is dug out whose size is kept equal to the size of the test plate |
| C. | Bottom level of the hole dug at the centre of the test pit, is kept at the level of the actual formation |
| D. | All the above |
| Answer» D. All the above | |
| 69. |
Failure of a slope occurs only when total shear force is |
| A. | Equal to total shearing strength |
| B. | Greater than total shearing strength |
| C. | Less than total shearing strength |
| D. | None of these |
| Answer» B. Greater than total shearing strength | |
| 70. |
If the natural water content of soil mass lies between its liquid limit and plastic limit, the soil mass is said to be in |
| A. | Liquid state |
| B. | Plastic state |
| C. | Semisolid state |
| D. | Solid state |
| Answer» B. Plastic state | |
| 71. |
Pick up the correct statement from the following: |
| A. | The permeability of the coarse-grained soils may be reduced by grouting |
| B. | The process of injecting fluids (i.e. grouts) into the pores space of the soil is called grouting |
| C. | The grouting increases the soil strength |
| D. | All the above |
| Answer» D. All the above | |
| 72. |
Negative skin friction on piles |
| A. | Is caused due to relative settlement of the soil |
| B. | Is caused in soft clays |
| C. | Decreases the pile capacity |
| D. | All of the above |
| Answer» D. All of the above | |
| 73. |
Select the correct statement. |
| A. | A uniform soil has more strength and stability than a nonuniform soil |
| B. | A uniform soil has less strength and stability than a nonuniform soil |
| C. | Uniformity coefficient does not affect strength and stability |
| D. | Uniformity coefficient of a poorly graded soil is more than that of a well graded soil |
| Answer» B. A uniform soil has less strength and stability than a nonuniform soil | |
| 74. |
If a soil undergoes a change in shape and volume by application of external loads over it, but recovers its shape and volume immediately after removal of the load, the property of the soil is said to be |
| A. | Resilience of soils |
| B. | Elasticity of soils |
| C. | Compressibility of soils |
| D. | None of these |
| Answer» B. Elasticity of soils | |
| 75. |
The water content in a soil sample when it continues to loose weight without loosing the volume, is called |
| A. | Shrinkage limit |
| B. | Plastic limit |
| C. | Liquid limit |
| D. | Semi-solid limit |
| Answer» A. Shrinkage limit | |
| 76. |
Effective stress is |
| A. | The stress at particles contact |
| B. | A physical parameter that can be measured |
| C. | Important because it is a function of engineering properties of soil |
| D. | All of the above |
| Answer» C. Important because it is a function of engineering properties of soil | |
| 77. |
The angle of internal friction is maximum for |
| A. | angular-grained loose sand |
| B. | angular-grained dense sand |
| C. | round-grained dense sand |
| D. | round-grained loose sand |
| Answer» B. angular-grained dense sand | |
| 78. |
If the coefficients of volume change and compressibility of a soil sample are 6.75 × 10-2 and 3 × 10-2 respectively, the void ratio of the soil sample, is |
| A. | 1.10 |
| B. | 1.15 |
| C. | 1.20 |
| D. | 1.30 |
| Answer» D. 1.30 | |
| 79. |
When a cohesionless soil attains quick condition, it looses |
| A. | Shear strength |
| B. | Bearing capacity |
| C. | Both (a) and (b) |
| D. | Neither (a) nor (6) |
| Answer» C. Both (a) and (b) | |
| 80. |
Select the correct statement. |
| A. | The greater the viscosity, the greater is permeability |
| B. | The greater the unit weight, the greater is permeability |
| C. | The greater the unit weight, the smaller is permeability |
| D. | Unit weight does not affect permeability |
| Answer» B. The greater the unit weight, the greater is permeability | |
| 81. |
A direct shear test possesses the following disadvantage: |
| A. | A relatively thin thickness of sample permits quick drainage |
| B. | A relatively thin thickness of sample permits quick dissipation of pore pressure developed during the test |
| C. | As the test progresses the area under shear, gradually changes |
| D. | None of these |
| Answer» C. As the test progresses the area under shear, gradually changes | |
| 82. |
A stratum of clay 2 m thick will get consolidated 80% in 10 years. For the 80% consolidation of 8 m thick stratum of the same clay, the time required is |
| A. | 100 years |
| B. | 120 years |
| C. | 140 years |
| D. | 160 years |
| Answer» D. 160 years | |
| 83. |
When the seepage pressure becomes equal to the pressure due to submerged weight of a soil, the effective pressure is reduced to zero and the soil particles have a tendency to move up in the direction of flow. This phenomenon is generally known |
| A. | Quick condition |
| B. | Boiling condition |
| C. | Quick sand |
| D. | All the above |
| Answer» D. All the above | |
| 84. |
If drainage is permitted throughout the test, during the application of both normal, and shear stresses so that full consolidation occurs and no excess pore pressure is set up at any stage of the test, is known as |
| A. | Quick test |
| B. | Drained test |
| C. | Consolidated undrained test |
| D. | None of these |
| Answer» B. Drained test | |
| 85. |
Degree of consolidation is |
| A. | Directly proportional to time and inversely proportional to drainage path |
| B. | Directly proportional to time and inversely proportional to square of drainage path |
| C. | Directly proportional to drainage path and inversely proportional to time |
| D. | Directly proportional to square of drainage path and inversely proportional to time |
| Answer» B. Directly proportional to time and inversely proportional to square of drainage path | |
| 86. |
Terzaghi's theory of one dimensional consolidation assumes |
| A. | Load is applied in one direction |
| B. | Coefficient of permeability is constant |
| C. | Excess pore water drains out only in the vertical direction |
| D. | All the above |
| Answer» D. All the above | |
| 87. |
The shear resistance of a soil is constituted basically of the following component. |
| A. | The frictional resistance to translocation between the individual soil particles at their contact point |
| B. | To the structural relation to displacement of the soil because of the interlocking of the particles |
| C. | Cohesion and adhesion between the surfaces of the soil particles |
| D. | All the above |
| Answer» D. All the above | |
| 88. |
The consolidation time for soils |
| A. | Increases with increasing compressibility |
| B. | Decreases with increasing permeability |
| C. | Increases rapidly with increasing size of soil mass |
| D. | All the above |
| Answer» D. All the above | |
| 89. |
Coefficient of compressibility is |
| A. | Constant for any type of soil |
| B. | Different for different types of soils and also different for a soil under different states of consolidation |
| C. | Different for different types of soils but same for a soil under different states of consolidation |
| D. | Independent of type of soil but depends on the stress history of soil |
| Answer» B. Different for different types of soils and also different for a soil under different states of consolidation | |
| 90. |
The ratio of the weight of water to the weight of solids in a given mass of soil, is known |
| A. | Porosity |
| B. | Specific gravity |
| C. | Void ratio |
| D. | Water content |
| Answer» D. Water content | |
| 91. |
In a liquid limit test, the moisture content at 10 blows was 70% and that at 100 blows was 20%. The liquid limit of the soil, is |
| A. | 35 % |
| B. | 50 % |
| C. | 65 % |
| D. | None of these |
| Answer» C. 65 % | |
| 92. |
The critical exist gradient of seepage water in soils, increases with |
| A. | An increase in specific gravity |
| B. | A decrease in specific gravity |
| C. | A decrease in void ratio |
| D. | Both (a) and (c) |
| Answer» D. Both (a) and (c) | |
| 93. |
The Mohr's straight theory is based on the following fact: |
| A. | Material fails essentially by shear |
| B. | Ultimate strength of the material is determined by the stress in the plane of slip |
| C. | Failure criterion is independent of the intermediate principal stress |
| D. | All the above |
| Answer» D. All the above | |
| 94. |
According to Coulomb's wedge theory, the active earth pressure slides the wedge |
| A. | Down and outwards on a slip surface |
| B. | Up and inwards on a slip surface |
| C. | Horizontal upward and parallel to base |
| D. | Horizontal inward and parallel to base |
| Answer» A. Down and outwards on a slip surface | |
| 95. |
Pile foundations are generally preferred to for |
| A. | Bridge foundations |
| B. | Sky scrapper buildings |
| C. | Residential buildings |
| D. | Runways |
| Answer» B. Sky scrapper buildings | |
| 96. |
The rise of water table below the foundation influences the bearing capacity of soil mainly by reducing |
| A. | Cohesion and effective angle of shearing resistance |
| B. | Cohesion and effective unit weight of soil |
| C. | Effective unit weight of soil and effective angle of shearing resistance |
| D. | Effective angle of shearing resistance |
| Answer» B. Cohesion and effective unit weight of soil | |
| 97. |
A soil mass is said to be in plastic equilibrium if |
| A. | It is stressed to maximum |
| B. | It is on the verge of failure |
| C. | It is in plastic stage |
| D. | It starts flowing |
| Answer» B. It is on the verge of failure | |
| 98. |
Stoke's law states that the velocity at which a grain settles out of suspension, the other factors remaining constant, is dependent upon |
| A. | Shape of grain |
| B. | Weight of grain |
| C. | Size of grain |
| D. | Shape, size and weight of grain |
| Answer» D. Shape, size and weight of grain | |
| 99. |
Pick up the correct statement from the following: |
| A. | A soil having pH value more than 7 is an acidic soil |
| B. | A soil having pH value less than 7 is an acidic soil |
| C. | A soil having pH value more than 7 is an alkaline soil |
| D. | A soil containing chemicals for the manufacture of Portland cement is preferred |
| Answer» B. A soil having pH value less than 7 is an acidic soil | |
| 100. |
Contact pressure beneath a rigid footing resting on cohesive soil is |
| A. | Less at edges compared to middle |
| B. | More at edges compared to middle |
| C. | Uniform throughout |
| D. | None of the above |
| Answer» B. More at edges compared to middle | |
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