Geotechnical Engineering MCQ
1. What does Consolidated-Undrained test assess?
Answer
Correct Answer:
The strength of soil under applied normal loads without drainage
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2. What is compressibility?
Answer
Correct Answer:
Property of a soil pertaining to its susceptibility to decrease in volume, when subjected to load
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3. What is the compression of a soil layer per unit of original thickness due to a given unit increase in pressure equal to?
Answer
Correct Answer:
The coefficient of compressibility divided by one plus the original void ratio
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4. What is the coefficient of volume compressibility?
Answer
Correct Answer:
The compression of a soil layer per unit of original thickness due to a given unit increase in pressure.
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5. What is the coefficient of uniformity?
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6. What is the value of D60/D10 known as?
Answer
Correct Answer:
Coefficient of uniformity
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7. What is deviator stress?
Answer
Correct Answer:
The difference between the axial and radial stresses of a triaxial test sample.
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8. What is the density of water at sea level?
Answer
Correct Answer:
64.0 lbm/ft³
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9. What is the average density of the mineral or rock that soil particles are composed of?
Answer
Correct Answer:
Density of soil grains
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10. What is the density index?
Answer
Correct Answer:
The density of a granular soil relative to the minimum and maximum densities achieved for that particular soil.
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11. What is density?
Answer
Correct Answer:
The ratio of the total mass to the total volume of a unit of soil.
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12. What is the ratio of the total mass to the total volume of a unit of soil?
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13. The degree of saturation of a given mass of soil is the _____.
Answer
Correct Answer:
Proportion of the volume of water to the total volume of voids
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14. What is the degree of saturation?
Answer
Correct Answer:
The proportion of the volume of water to the total volume of voids of a given mass of soil.
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15. After a given elapsed time, what is the proportion of consolidation that has occurred?
Answer
Correct Answer:
Degree of consolidation
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16. What is the degree of consolidation?
Answer
Correct Answer:
Proportion of consolidation that has occurred after a given elapsed time.
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17. What is the velocity of flow in Darcy's law?
Answer
Correct Answer:
Hydraulic conductivity X hydraulic gradient.
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18. What is the cyclic stress ratio?
Answer
Correct Answer:
A numerical rating of the potential for liquefaction in sands.
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19. What is the critical hydraulic gradient?
Answer
Correct Answer:
The hydraulic gradient at which effective stresses becomes zero.
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20. What is critical hydraulic gradient?
Answer
Correct Answer:
The hydraulic gradient at which effective stresses become zero.
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21. What is the critical height of a slope?
Answer
Correct Answer:
The height of a slope that corresponds to a factor of safety of 1.0 relative to slope failure.
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22. What is the critical circle?
Answer
Correct Answer:
The slip circle that corresponds to the lowest factor of safety.
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23. What is Creep?
Answer
Correct Answer:
Time dependent deformations which occurs in soil at constant effective stress without changes in volume and pore water pressure.
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24. What is Coulomb's equation named after?
Answer
Correct Answer:
Charles Augustin Coulomb
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25. What is Coulomb's equation?
Answer
Correct Answer:
An equation relating the shear strength of soil to the normal effective stress on the failure plane.
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26. What is the name of the earth pressure theory that includes friction between the soil and retaining structure?
Answer
Correct Answer:
Coulomb earth pressure theory
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27. What does Coulomb earth pressure theory take into account?
Answer
Correct Answer:
Friction between the soil and retaining structure
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28. What is a horizontally long footing which supports a wall called?
Answer
Correct Answer:
Continuous footing
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29. What is a continuous footing?
Answer
Correct Answer:
A horizontally long footing supporting a wall.
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30. What is a consolidation test used for?
Answer
Correct Answer:
Predicting consolidation of a soil under applied structural loads
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31. What is the consistency index?
Answer
Correct Answer:
A measure of the relationship between the current water content and the consistency limits.
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32. What is the consistency index a measure of?
Answer
Correct Answer:
The relationship between the current water content and the consistency limits.
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33. What is water content of clay relative to the Atterberg limits?
Answer
Correct Answer:
Consistency
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34. What is an aquifer?
Answer
Correct Answer:
A body of water beneath the earth's surface from which water may be drawn by natural means.
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35. What is the point of the cone used in a cone penetration test?
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36. Cone resistance is measured during which test?
Answer
Correct Answer:
Cone penetration test
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37. What is the compression test used for?
Answer
Correct Answer:
To measure the amount of compression the soil undergoes.
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38. What is the purpose of the compression test?
Answer
Correct Answer:
To estimate the amount of compression the soil undergoes
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39. What is the compressibility index?
Answer
Correct Answer:
The logarithmic slope of the primary consolidation curve.
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40. What causes compaction?
Answer
Correct Answer:
Vibration, self-weight
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41. What are colluvial soils?
Answer
Correct Answer:
Soils deposited at the base of foot-hills via gravity or erosion.
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42. Colluvial soils are deposited at the base of _____.
Answer
Correct Answer:
Foot-hills
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43. What is the force that holds together molecules or like particles within a substance called?
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44. What is the definition of a cohesionless soil?
Answer
Correct Answer:
Granular soils (sand and gravel type) with values of cohesion close to zero.
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45. What is a cofferdam?
Answer
Correct Answer:
A temporary structure used to enclose a construction area, and prevent soil or water from entering the construction area.
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46. What is the coefficient of uniformity a measure of?
Answer
Correct Answer:
The slope of a grain size distribution curve
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47. What is coefficient of secondary consolidation?
Answer
Correct Answer:
The change in volumetric strain per a logarithmic cycle of time after primary consolidation is complete.
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48. What is the definition of coefficient of permeability?
Answer
Correct Answer:
Hydraulic conductivity
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49. What is the coefficient of curvature a measure of?
Answer
Correct Answer:
Shape parameter obtained from a grain size distribution curve.
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50. What is the coefficient of curvature?
Answer
Correct Answer:
A measure of the shape parameter obtained from a grain size distribution curve.
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51. What is the coefficient of consolidation?
Answer
Correct Answer:
The rate of change of volume during primary consolidation.
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52. What is the unit of Coefficient of Consolidation?
Answer
Correct Answer:
Ft²/day, m²/s
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53. What is the coefficient of compressibility?
Answer
Correct Answer:
The ratio of void ratio difference to the effective pressure difference
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54. The coefficient of compressibility is the ratio of what to what?
Answer
Correct Answer:
Void ratio difference to the effective pressure difference
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55. What is the size range of cobbles?
Answer
Correct Answer:
3 inches (76 mm) to 12 inches (305 mm)
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56. What is the minimum percentage of grains retained on the #200 sieve for a soil to be considered coarse-grained?
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57. What is the definition of coarse-grained soils?
Answer
Correct Answer:
Soils with more than 50% by weight of grains retained on the #200 sieve (0.075mm).
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58. What is the size of Clay Soil particles?
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59. What is a circular footing?
Answer
Correct Answer:
Isolated/ spread footing that is circular shaped.
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60. What produces capillary stresses?
Answer
Correct Answer:
Surface tension of pore water
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61. Which of the following is not a result of capillary stresses?
Answer
Correct Answer:
Pore water pressures greater than atmospheric values
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62. What is the California Bearing Ratio (CBR) used for?
Answer
Correct Answer:
To determine the suitability of a soil for use as a subbase in a pavement section.
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63. What does CBR stand for?
Answer
Correct Answer:
California Bearing Ratio
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64. What is a Caisson?
Answer
Correct Answer:
A component of a particular foundation system.
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65. Buoyant density is equal to what?
Answer
Correct Answer:
Soil density - Density of water
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66. What is the bulk unit weight?
Answer
Correct Answer:
The total weight of water and soil particles contained in a unit volume of soil.
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67. What is the unit of measurement for Bulk density?
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68. What is the mass of water and soil particles contained in a unit volume of soil called?
Answer
Correct Answer:
Bulk density
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69. What is the British Soil Classification System based on?
Answer
Correct Answer:
Size, consistency and structure
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70. What does the British Soil Classification System classify soils on?
Answer
Correct Answer:
Size, consistency, and structure.
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71. What is braced excavation?
Answer
Correct Answer:
The use of bracing to laterally support the side-walls of temporary trenches or cuts.
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72. What is a borrow?
Answer
Correct Answer:
A site that is used to supply soils for earthwork construction
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73. What is the definition of bedrock?
Answer
Correct Answer:
Strong rock underlying surface deposits of soil and weathered rock.
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74. What is the total stress transferred from the structure to the foundation called?
Answer
Correct Answer:
Bearing pressure
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75. What does bearing pressure refer to?
Answer
Correct Answer:
The total stress transferred from the structure to the foundation, then to the soil below the foundation.
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76. What do bearing capacity factors represent?
Answer
Correct Answer:
The angle of internal friction of the soil
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77. What is the definition of bearing capacity?
Answer
Correct Answer:
The ability of the underlying soil to support the foundation loads without shear failure.
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78. What is the sum of the confining and vertical stresses along an axis of a triaxial test sample called?
Answer
Correct Answer:
Axial stress
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79. What is axial stress?
Answer
Correct Answer:
Total or effective stress acting along an axis of a triaxial test sample.
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80. What is axial strain?
Answer
Correct Answer:
Direct strain measured along an axis of a triaxial test sample.
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81. What do the Atterberg Limits test for?
Answer
Correct Answer:
The transition between a solid, semi-solid, plastic solid or liquid
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82. What are the Atterberg Limits?
Answer
Correct Answer:
The water contents of a soil mass corresponding to the transition between a solid, semi-solid, plastic solid or liquid.
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83. What is at-rest earth pressure?
Answer
Correct Answer:
The horizontal stress developed in a mass of soil loaded in conditions of zero horizontal strain.
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84. What is the definition of artesian?
Answer
Correct Answer:
A condition that exists when the water table piezometric surface lies above the ground level.
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85. What is the meaning of "Aquifer"?
Answer
Correct Answer:
A stratum of soil with relatively high permeability; a water-bearing stratum of rock or soil.
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86. What does the term "anisotropic" refer to?
Answer
Correct Answer:
Soil having different properties in different directions
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87. What is the ratio between the relative deflection between two points in a foundation and the distance between them called?
Answer
Correct Answer:
Angular distortion
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88. What is the angle of wall friction?
Answer
Correct Answer:
The angle of friction between soil and the surface of a retaining wall or bottom side of a foundation.
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89. The angle of friction between soil and the bottom side of a foundation is known as the ___________.
Answer
Correct Answer:
Angle of wall friction
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90. What is the angle referred to horizontal of a plane or other surface along which a discontinuous slip or rupture may occur?
Answer
Correct Answer:
Angle of slip plane
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91. Angle of slip plane refers to the angle of ________.
Answer
Correct Answer:
A plane or other surface along which a discontinuous slip or rupture may occur
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92. What does the angle of shearing resistance measure?
Answer
Correct Answer:
The ratio of effective shear and normal stresses mobilized at any state prior to failure.
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93. What is the angle of repose?
Answer
Correct Answer:
The maximum angle, just before failure, of a slope composed of granular material
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94. At which angle does shear failure occur for a given soil?
Answer
Correct Answer:
Angle of internal friction
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95. What does AASHTO stand for?
Answer
Correct Answer:
American Association of State Highway Transportation Officials' Classification System
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96. What are alluvial soils?
Answer
Correct Answer:
Soils deposited in a valley or slightly graded area by transporting sediments through a mountain river or streams.
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97. The bearing pressure that can be allowed on a foundation soil is called the ___________.
Answer
Correct Answer:
Allowable bearing capacity
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98. The air-voids ratio is the ratio of _____.
Answer
Correct Answer:
The volume of air to the total volume of a mass of soil
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99. What is the air-void ratio?
Answer
Correct Answer:
The ratio of the volume of air to the total volume of a mass of soil.
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100. What is Adhesion?
Answer
Correct Answer:
The shear resistance between soil and a structure
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101. What is the shear resistance between soil and a structure called?
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102. What is the ratio of plasticity index to percent by weight of clay?
Answer
Correct Answer:
The ratio of plasticity index to percent by weight of clay.
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103. What is the purpose of an Active Zone?
Answer
Correct Answer:
The area behind a retaining structure that is above the failure plane.
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104. What is the area behind a retaining structure called if it is above the failure plane?
Answer
Correct Answer:
Active (Rankine) zone
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105. What is the horizontal stress exerted by a mass of soil on a retaining wall called?
Answer
Correct Answer:
Active earth pressure
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106. Retaining walls are used to resist _____.
Answer
Correct Answer:
The horizontal stress exerted by a mass of soil
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Architectural Engineering MCQs | Topic-wise