MCQOPTIONS
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MCQOPTIONS
This section includes 130 Mcqs, each offering curated multiple-choice questions to sharpen your Geotechnical Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 51. |
The critical hydraulic gradient ic in terms of specific gravity G and voids ratio e is given by ______ |
| A. | Ge |
| B. | G/e |
| C. | \(\frac{G-1}{1+e}\) |
| D. | \(\frac{G+1}{1-e}\) |
| Answer» D. \(\frac{G+1}{1-e}\) | |
| 52. |
Khosla’s theory can be used for calculating which of the following? |
| A. | Uplift pressure and exit gradient |
| B. | Seepage pressure |
| C. | None of the mentioned |
| D. | All of the mentioned |
| Answer» B. Seepage pressure | |
| 53. |
The coefficient of permeability is 6*10¯⁷cm/s for a soil with a certain liquid. If the viscosity is reduced to half, then the coefficient of permeability is __________ |
| A. | 6*10¯⁷cm/s |
| B. | 17*10¯⁷cm/s |
| C. | 8*10¯⁷cm/s |
| D. | 12*10¯⁷cm/s |
| Answer» E. | |
| 54. |
The phreatic line is also known as the ________ |
| A. | seepage line |
| B. | discharge line |
| C. | velocity line |
| D. | pressure line |
| Answer» B. discharge line | |
| 55. |
The pressure at the exit gradient at which the upward force is equal to the submerged weight of the soil is called the ___________ |
| A. | Floatation gradient |
| B. | Bursting gradient |
| C. | Critical gradient |
| D. | All of the mentioned |
| Answer» E. | |
| 56. |
Water is flowing at a rate of 0.04 m³/s in a soil sample of 12m thick and cross section of 50m². The coefficient of permeability is 1.6*10¯³m/s. What will be the seepage pressure? |
| A. | 50.76 kN/m² |
| B. | 52.34 kN/m² |
| C. | 55.34 kN/m² |
| D. | 58.86 kN/m² |
| Answer» E. | |
| 57. |
In the zone of soil through which water seeps, there will be ____________ change in the degree of saturation. |
| A. | More |
| B. | Less |
| C. | All of the mentioned |
| D. | None of the mentioned |
| Answer» E. | |
| 58. |
The critical hydraulic gradient ic is unity when the specific gravity G=2.67 and voids ratio e is ______ |
| A. | 0.67 |
| B. | 0.33 |
| C. | 0.43 |
| D. | 0.80 |
| Answer» B. 0.33 | |
| 59. |
The hydraulic gradient theory of weir design was developed by __________ |
| A. | Darcy and Beresford |
| B. | Col. Clibborn |
| C. | None of the mentioned |
| D. | All of the mentioned |
| Answer» B. Col. Clibborn | |
| 60. |
In the earth dam with no filter, the base parabola does not cut the d/s slope. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» C. May be True or False | |
| 61. |
If the effective permeability k’ is 6*10¯⁷cm/s and kᵧ=4*10¯⁷cm/s, then kₓ is equal to ________ |
| A. | 6*10¯⁷cm/s |
| B. | 7*10¯⁷cm/s |
| C. | 8*10¯⁷cm/s |
| D. | 9*10¯⁷cm/s |
| Answer» E. | |
| 62. |
What is the line within a dam section, below which there are positive hydrostatic pressures? |
| A. | Phreatic and Seepage line |
| B. | Equipotential line |
| C. | None of the mentioned |
| D. | All of the mentioned |
| Answer» B. Equipotential line | |
| 63. |
The total head at any point may be regarded as _________ measure with respect to the datum. |
| A. | potential energy |
| B. | potential energy per unit weight of water |
| C. | unit weight of water |
| D. | volume of water |
| Answer» C. unit weight of water | |
| 64. |
The hydraulic potential at any point is given by _________ |
| A. | h=hw±Z |
| B. | h=hw*Z |
| C. | h=hw/Z |
| D. | h=Z/hw |
| Answer» B. h=hw*Z | |
| 65. |
Seepage pressure is responsible for quick sand condition. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» B. False | |
| 66. |
The critical hydraulic gradient is given by _______ |
| A. | ic = γ’/ γw |
| B. | ic = γ’+ γw |
| C. | ic = γ’-γw |
| D. | ic = γ’ |
| Answer» B. ic = γ’+ γw | |
| 67. |
The seepage pressure pₛ with respect to hydraulic gradient i is given by ________ |
| A. | ihγwz |
| B. | iγwz/h |
| C. | iγwz |
| D. | ih/zγw |
| Answer» D. ih/zγw | |
| 68. |
The relationship between seepage force J and seepage pressure pₛ is given by _______ |
| A. | J=pₛ/A |
| B. | J=pₛ+A |
| C. | J=pₛ–A |
| D. | J=pₛA |
| Answer» E. | |
| 69. |
The effective pressure subjected to seepage pressure is given by _______ |
| A. | σ’=zγsat*izγw |
| B. | σ’=zγ’*izγw |
| C. | σ’=zγ’±izγw |
| D. | σ’=zγ’/izγw |
| Answer» D. σ’=zγ’/izγw | |
| 70. |
The deflection of flow lines at interface of dissimilar soils is given by ______ |
| A. | \(\frac{k_1}{k_2} =cosθ\) |
| B. | \(\frac{k_1}{k_2} =sinθ \) |
| C. | \(\frac{k_1}{k_2} =\frac{tanθ_1}{tanθ_2} \) |
| D. | \(\frac{k_1}{k_2} =cotθ\) |
| Answer» D. \(\frac{k_1}{k_2} =cotθ\) | |
| 71. |
Total head is the sum of ________ |
| A. | piezometric head and velocity head |
| B. | piezometric head and position head |
| C. | position head and velocity head |
| D. | velocity head and pressure head |
| Answer» C. position head and velocity head | |
| 72. |
The phreatic line can be located by Casagrande method. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» B. False | |
| 73. |
The seepage medium can be replaced by ____________electric model having the same geometric shape. |
| A. | Potential divider |
| B. | Insulator |
| C. | Electric conductor |
| D. | Potentiometer |
| Answer» D. Potentiometer | |
| 74. |
A hydraulic structure should not be built on pervious soil, because of _________ |
| A. | Higher water level at the upstream of the structure |
| B. | Compressibility of the soil is low |
| C. | Excessive water pressure above the soil |
| D. | None of the mentioned |
| Answer» B. Compressibility of the soil is low | |
| 75. |
In ______ direction of flow, the effective pressure is increased. |
| A. | perpendicular |
| B. | tangential |
| C. | upward |
| D. | downward |
| Answer» E. | |
| 76. |
The seepage pressure pₛ is given by _________ |
| A. | hγw |
| B. | h/γw |
| C. | h+γw |
| D. | h-γw |
| Answer» B. h/γw | |
| 77. |
The concept of undermining by ‘foundation’ was put forward by ____________ |
| A. | F.F.Haigh |
| B. | Khosla |
| C. | Casagrande |
| D. | Pavlov sky |
| Answer» B. Khosla | |
| 78. |
Calculate the height of water table rise in soil mass from a sand stratum of 12m deep from ground level, at which the effective pressure is zero. The water percolates through a soil mass of thickness 5m. The γsat=18.6 kN/m³ and γw=9.81 kN/m³. |
| A. | 7.68m |
| B. | 9.48m |
| C. | 5.24m |
| D. | 10m |
| Answer» C. 5.24m | |
| 79. |
The first rational approach to the problem of seepage through soils was ________ |
| A. | Archimedes |
| B. | Poiseuille |
| C. | Darcy |
| D. | Terzaghi |
| Answer» E. | |
| 80. |
The seepage force per unit volume j is given by _______ |
| A. | j=iγwzA |
| B. | j=izA |
| C. | j=iγw |
| D. | j=zA |
| Answer» D. j=zA | |
| 81. |
The exit gradient can be expressed by which of the following expression? |
| A. | ie = Δh/i |
| B. | ie = Δh.i |
| C. | ie = l/h |
| D. | ie = h/i |
| Answer» B. ie = Δh.i | |
| 82. |
Undermining of the sub soil is due to ___________ |
| A. | Seepage |
| B. | Piping |
| C. | Excessive water pressure |
| D. | Uplift pressure |
| Answer» E. | |
| 83. |
The flow lines and equipotential proposed by Kozney is in the shape of ____________ |
| A. | Hyperbola |
| B. | Ellipse |
| C. | Parabola |
| D. | Circle |
| Answer» D. Circle | |
| 84. |
The quantity of water which flows out from any element of volume is _________ than quantity which flows out. |
| A. | Greater |
| B. | smaller |
| C. | Equal |
| D. | All of the mentioned |
| Answer» D. All of the mentioned | |
| 85. |
Water is flowing at a rate of 0.04 m³/s in a soil sample of 12m thick and cross section of 50m². The coefficient of permeability is 1.6*10¯³m/s. What will be the seepage force? |
| A. | 2943kN |
| B. | 3453kN |
| C. | 2454kN |
| D. | 2443kN |
| Answer» B. 3453kN | |
| 86. |
The seepage pressure always acts _______ |
| A. | in the direction of flow |
| B. | opposite to direction of flow |
| C. | perpendicular to direction of flow |
| D. | tangential to direction of flow |
| Answer» B. opposite to direction of flow | |
| 87. |
The position head is also called ________ |
| A. | total head |
| B. | elevation head |
| C. | velocity head |
| D. | pressure head |
| Answer» C. velocity head | |
| 88. |
The path along which, the individual particles of water seep through the soil are ___________ |
| A. | Stream lines and Flow lines |
| B. | Equipotential lines |
| C. | None of the mentioned |
| D. | All of the mentioned |
| Answer» B. Equipotential lines | |
| 89. |
The hydrostatic pressure in terms of piezometric head can be calculated from which of the following equation? |
| A. | hW = h – Z |
| B. | hW = h + Z |
| C. | hW = u/γW |
| D. | hW = h/z |
| Answer» B. hW = h + Z | |
| 90. |
The hydraulic gradient is equal to the __________ |
| A. | hydraulic head |
| B. | velocity head |
| C. | hydraulic head per unit distance |
| D. | pressure head |
| Answer» D. pressure head | |
| 91. |
What are the types of flow head that exist at any point in a saturated soil mass? |
| A. | Piezometric head or pressure head |
| B. | Velocity head |
| C. | Position head |
| D. | All of the mentioned |
| Answer» E. | |
| 92. |
The slope of discharge face can exceed _______ |
| A. | 30° |
| B. | 45° |
| C. | 60° |
| D. | 90° |
| Answer» E. | |
| 93. |
In homogeneous soil, every transition in the shape of curves drawn in flow net must be ____________ |
| A. | Smooth |
| B. | Sharp |
| C. | Rough |
| D. | All of the mentioned |
| Answer» B. Sharp | |
| 94. |
The phreatic line is defined as the line within a dam section below which there are ________ in dam. |
| A. | positive hydrostatic pressures |
| B. | negative hydrostatic pressures |
| C. | neutral hydrostatic pressures |
| D. | no hydrostatic pressure |
| Answer» B. negative hydrostatic pressures | |
| 95. |
Seepage pressure is important for which of the following purpose? |
| A. | Stability analysis |
| B. | Structral arrangement |
| C. | Total head |
| D. | All of the mentioned |
| Answer» B. Structral arrangement | |
| 96. |
The total head at any point on soil may be regarded as __________ per unit weight of water measured. |
| A. | Velocity energy |
| B. | Hydraulic potential |
| C. | Potential energy |
| D. | Piezometric energy |
| Answer» C. Potential energy | |
| 97. |
A combination of velocity potential (φ) and stream function (ψ) is called ___________ |
| A. | Velocity potential |
| B. | Seepage pressure |
| C. | Complex potential |
| D. | Hydraulic gradient |
| Answer» D. Hydraulic gradient | |
| 98. |
The loss of head per unit distance in soil is called ___________ |
| A. | Velocity potential |
| B. | Hydraulic gradient |
| C. | Velocity gradient |
| D. | Stream function |
| Answer» C. Velocity gradient | |
| 99. |
The quick condition takes place when effective pressure is _______ |
| A. | σ’=0 |
| B. | σ’=1 |
| C. | σ’= zγ’+ pₛ |
| D. | σ’= zγ’ |
| Answer» B. σ’=1 | |
| 100. |
A soil has voids ratio of 0.78 and critical gradient at which quick sand condition occurs is 0.94. Calculate the specific gravity. |
| A. | 2 |
| B. | 2.5 |
| C. | 2.67 |
| D. | 2.71 |
| Answer» D. 2.71 | |