MCQOPTIONS
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MCQOPTIONS
This section includes 95 Mcqs, each offering curated multiple-choice questions to sharpen your Civil Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 51. |
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» C. greater than specific gravity of soil | |
| 52. |
If the water table rises upto ground surface, then the___________________? |
| A. | effective stress is reduced due to decrease in total stress only but pore water pressure does not change |
| B. | effective stress is reduced due to increase in pore water pressure only but total stress does not change |
| C. | total stress is reduced due to increase in pore water pressure only but effec-tive stress does not change |
| D. | total stress is increased due to de-crease in pore water pressure but effective stress does not change |
| Answer» C. total stress is reduced due to increase in pore water pressure only but effec-tive stress does not change | |
| 53. |
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________________? |
| A. | 1.0 and 0.0 |
| B. | 0.0 and 1.0 |
| C. | 0.5 and 1.0 |
| D. | 1.0 and 0.5 |
| Answer» D. 1.0 and 0.5 | |
| 54. |
If the voids of a soil mass are full of air only, the soil is termed as_______________? |
| A. | air entrained soil |
| B. | partially saturated soil |
| C. | dry soil |
| D. | dehydrated soil |
| Answer» D. dehydrated soil | |
| 55. |
If the shearing stress is zero on two planes, then the angle between the two planes is________________? |
| A. | 45° |
| B. | 90° |
| C. | 135° |
| D. | 225° |
| Answer» C. 135° | |
| 56. |
If the sand in-situ is in its densest state, then the relative density of sand is_____________? |
| A. | zero |
| B. | 1 |
| C. | between 0 and 1 |
| D. | greater than 1 |
| Answer» C. between 0 and 1 | |
| 57. |
If the plasticity index of a soil mass is zero, the soil is______________? |
| A. | sand |
| B. | silt |
| C. | clay |
| D. | clayey silt |
| Answer» B. silt | |
| 58. |
If the permeability of a soil is 0.8 mm/sec, the type of soil is_______________? |
| A. | gravel |
| B. | sand |
| C. | silt |
| D. | clay |
| Answer» C. silt | |
| 59. |
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. | semi-solid state |
| D. | solid state |
| Answer» C. semi-solid state | |
| 60. |
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______________? |
| A. | the liquid limit of soil always increases |
| B. | the liquid limit of soil always decreases |
| C. | the liquid limit of soil may increase |
| D. | the liquid limit of soil may decrease |
| Answer» B. the liquid limit of soil always decreases | |
| 61. |
If the degree of saturation of a partially saturated soil is 60%, then air content of the soil is______________? |
| A. | 40% |
| B. | 60% |
| C. | 80% |
| D. | 100% |
| Answer» B. 60% | |
| 62. |
If a cohesive soil specimen is subjected to a vertical compressive load, the inclination of the cracks to the horizontal is__________________? |
| A. | 90° |
| B. | 45° |
| C. | 22.5° |
| D. | 0° |
| Answer» C. 22.5° | |
| 63. |
Highway Research Board (HRB) classification of soils is based on__________________? |
| A. | particle size composition |
| B. | plasticity characteristics |
| C. | both particle size composition and plasticity characteristics |
| D. | none of the above |
| Answer» D. none of the above | |
| 64. |
For better strength and stability, the fine grained soils and coarse grained soils are compacted respectively as____________________? |
| A. | dry of OMC and wet of OMC |
| B. | wet of OMC and dry of OMC |
| C. | wet of OMC and wet of OMC |
| D. | dry of OMC and dry of OMC where OMC is optimum moisture content |
| Answer» C. wet of OMC and wet of OMC | |
| 65. |
For a loose sand sample and a dense sand sample consolidated to the same effective stress_____________? |
| A. | ultimate strength is same and also peak strength is same |
| B. | ultimate strength is different but peak strength is same |
| C. | ultimate strength is same but peak strength of dense sand is greater than that of loose sand |
| D. | ultimate strength is same but peak |
| Answer» D. ultimate strength is same but peak | |
| 66. |
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» D. all of the above | |
| 67. |
Effective stress on soil_____________? |
| A. | increases voids ratio and decreases permeability |
| B. | increases both voids ratio and permeability |
| C. | decreases both voids ratio and permeability |
| D. | decreases voids ratio and increases permeability |
| Answer» D. decreases voids ratio and increases permeability | |
| 68. |
During the first stage of triaxial test when the cell pressure is increased from 0.10 N/mm2 to 0.26 N/mm2, the pore water pressure increases from 0.07 N/mm2 to 0.15 “N/mm2. Skempton’s pore pressure parameter B is___________________? |
| A. | 0.5 |
| B. | -0.5 |
| C. | 2.0 |
| D. | – 2.0 |
| Answer» B. -0.5 | |
| 69. |
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__________________? |
| A. | increases by 25% |
| B. | increases by 50% |
| C. | increases by 33.3% |
| D. | decreases by 33.3% |
| Answer» C. increases by 33.3% | |
| 70. |
Dispersed type of soil structure is an arrangement comprising particles having______________? |
| A. | face to face or parallel orientation |
| B. | edge to edge orientation |
| C. | edge to face orientation |
| D. | all of the above |
| Answer» B. edge to edge orientation | |
| 71. |
Direct measurement of permeability of the specimen at any stage of loading can be made_______________? |
| A. | only in fixed ring type consolido-meter |
| B. | only in floating ring type consolido-meter |
| C. | both (A) and (B) |
| D. | none of the above |
| Answer» B. only in floating ring type consolido-meter | |
| 72. |
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» C. directly proportional to drainage path and inversely proportional to time | |
| 73. |
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» C. uniform throughout | |
| 74. |
Constant head permeameter is used to test permeability of_______________? |
| A. | silt |
| B. | clay |
| C. | coarse sand |
| D. | fine sand |
| Answer» D. fine sand | |
| 75. |
Compressibility of sandy soils is______________? |
| A. | almost equal to that of clayey soils |
| B. | much greater than that of clayey soils |
| C. | much less than that of clayey soils |
| D. | none of the above |
| Answer» D. none of the above | |
| 76. |
Coefficient of permeability of soil______________? |
| A. | does not depend upon temperature |
| B. | increases with the increase in temperature |
| C. | increases with the decrease in temperature |
| D. | none of the above |
| Answer» C. increases with the decrease in temperature | |
| 77. |
Coefficient of earth pressure at rest is__________________? |
| A. | less than active earth pressure but greater than passive earth pressure |
| B. | greater than active earth pressure but less than passive earth pressure |
| C. | greater than both the active earth pressure and passive earth pressure |
| D. | less than both the active and passive earth pressures |
| Answer» C. greater than both the active earth pressure and passive earth pressure | |
| 78. |
Coefficient of consolidation for clays normally_______________? |
| A. | decreases with increase in liquid limit |
| B. | increases with increase in liquid limit |
| C. | first increases and then decreases with increase in liquid limit |
| D. | remains constant at all liquid limits |
| Answer» B. increases with increase in liquid limit | |
| 79. |
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» C. different for different types of soils but same for a soil under different states of consolidation | |
| 80. |
Coefficient of consolidation of a soil is affected by_______________? |
| A. | compressibility |
| B. | permeability |
| C. | both compressibility and permeability |
| D. | none of the above |
| Answer» D. none of the above | |
| 81. |
Coarse grained soils are best compacted by a_______________? |
| A. | drum roller |
| B. | rubber tyred roller |
| C. | sheep’s foot roller |
| D. | vibratory roller |
| Answer» E. | |
| 82. |
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 Cv/2 to achieve the same degree of consolidation is_________________? |
| A. | 3 months |
| B. | 6 months |
| C. | 12 months |
| D. | 24 months |
| Answer» B. 6 months | |
| 83. |
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» D. all of the above | |
| 84. |
At liquid limit, all soils possess________________? |
| A. | same shear strength of small magnitude |
| B. | same shear strength of large magnitude |
| C. | different shear strengths of small magnitude |
| D. | different shear strengths of large magnitude |
| Answer» B. same shear strength of large magnitude | |
| 85. |
Allowable bearing pressure for a foundation depends upon_______________? |
| A. | allowable settlement only |
| B. | ultimate bearing capacity of soil only |
| C. | both allowable settlement and ultimate bearing capacity |
| D. | none of above |
| Answer» D. none of above | |
| 86. |
According to IS classification, the range of silt size particles is_________________? |
| A. | 4.75 mm to 2.00 mm |
| B. | 2.00 mm to 0.425 mm |
| C. | 0.425 mm to 0.075 mm |
| D. | 0.075 mm to 0.002 mm |
| Answer» E. | |
| 87. |
According to Atterberg, the soil is said to be of medium plasticity if the plasticity index PI is____________? |
| A. | 0 < PI < 7 |
| B. | 7< 17 |
| C. | 17 |
| Answer» C. 17 | |
| 88. |
A soil has a bulk density of 22 kN/m3 and water content 10 %. The dry density of soil is_______________? |
| A. | 18.6 kN/m3 |
| B. | 20.0 kN/m3 |
| C. | 22.0 kN/m3 |
| D. | 23.2 kN/m3 |
| Answer» C. 22.0 kN/m3 | |
| 89. |
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_________________? |
| A. | 7° |
| B. | 10° |
| C. | 12° |
| D. | 17° |
| Answer» D. 17° | |
| 90. |
A pycnometer is used to determine_______________? |
| A. | water content and voids ratio |
| B. | specific gravity and dry density |
| C. | water content and specific gravity |
| D. | voids ratio and dry density |
| Answer» D. voids ratio and dry density | |
| 91. |
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__________________? |
| A. | 10 mm |
| B. | 20 mm |
| C. | 40 mm |
| D. | none of the above |
| Answer» B. 20 mm | |
| 92. |
A fully saturated soil is said to be________________? |
| A. | one phase system |
| B. | two phase system with soil and air |
| C. | two phase system with soil and water |
| D. | three phase system |
| Answer» D. three phase system | |
| 93. |
A cylindrical specimen of saturated soil failed under an axial vertical stress of 100kN/m2 when it was laterally unconfmed. 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______________________? |
| A. | 0.5 N/mm2 and 30° |
| B. | 0.05 N/mm2 and 0° |
| C. | 0.2 N/mm2 and 0° |
| D. | 0.05 N/mm2 and 45° |
| Answer» C. 0.2 N/mm2 and 0° | |
| 94. |
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_______________? |
| A. | 15 mm |
| B. | between 15 mm and 25 mm |
| C. | 25 mm |
| D. | greater than 25 mm |
| Answer» C. 25 mm | |
| 95. |
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___________________? |
| A. | 15 mm |
| B. | 30 mm |
| C. | 50 mm |
| D. | 167 mm |
| Answer» D. 167 mm | |