MCQOPTIONS
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MCQOPTIONS
This section includes 212 Mcqs, each offering curated multiple-choice questions to sharpen your Thermodynamics knowledge and support exam preparation. Choose a topic below to get started.
| 51. |
In wet soil mass, air occupies one-seventh of its volume and water occupies one- eighth of its volume. The void ratio of the soil is ______ |
| A. | 0.25 |
| B. | 0.36 |
| C. | 0.43 |
| D. | 1 |
| Answer» C. 0.43 | |
| 52. |
The formula for density index Iᴅ is ______ |
| A. | (ee_{max} – e) |
| B. | \(\frac{(e_{max} – e)}{(e_{min}-e)}\) |
| C. | \(\frac{(e_{max} – e_{min})}{(e_{max}-e)}\) |
| D. | \(\frac{(e_{max} – e)}{(e_{max}-e_{min})}\) |
| Answer» E. | |
| 53. |
The term density index Iᴅ is used for cohesion-less soil only. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» B. False | |
| 54. |
What will be the degree of saturation of a soil sample whose specific gravity G=2.7, void ratio e=0.66 and water content w=20%? |
| A. | 85.88% |
| B. | 90.91% |
| C. | 81.81% |
| D. | 92.92% |
| Answer» D. 92.92% | |
| 55. |
If air content and degree of saturation are represented as ac and S respectively, then the relationship between them is ________ |
| A. | ac= 1/S |
| B. | ac=1-S |
| C. | S=1+ac |
| D. | S=ac |
| Answer» C. S=1+ac | |
| 56. |
The relationship between porosity n and void ratio e is given by _______ |
| A. | 1+n= 1/(1+e) |
| B. | 1-n= 1/(1+e) |
| C. | n= 1/e |
| D. | n= 1/(1+e) |
| Answer» C. n= 1/e | |
| 57. |
The percentage void ratio is defined as the ratio of _____ |
| A. | volume of air voids to total volume of the soil mass |
| B. | volume of air voids to volume of total voids |
| C. | volume of air voids to volume of water |
| D. | volume of voids to total volume of the soil mass |
| Answer» B. volume of air voids to volume of total voids | |
| 58. |
The relative density of loose granular soil is given by the range ______ in percentage. |
| A. | 0-15 |
| B. | 15-35 |
| C. | 35-65 |
| D. | 85-100 |
| Answer» C. 35-65 | |
| 59. |
If the porosity of a soil sample is 22%, then what will be its void ratio? |
| A. | 0.3 |
| B. | 0.27 |
| C. | 0.28 |
| D. | 0.25 |
| Answer» D. 0.25 | |
| 60. |
The relationship between γ, S, G and e is ______ |
| A. | \(γ=\frac{(GS+e) γ_w}{(1+e)}\) |
| B. | \(γ=\frac{(G+eS) γ_w}{(1+e)}\) |
| C. | \(γ=\frac{(G+e)S γ_w}{(1+e)}\) |
| D. | \(γ=\frac{(G+e) γ_w}{(1+e)S}\) |
| Answer» C. \(γ=\frac{(G+e)S γ_w}{(1+e)}\) | |
| 61. |
The relationship between γₛₐₜ, G and e is _______ |
| A. | \(γ_{sat}=\frac{(G*e) γ_w}{(1+e)}\) |
| B. | \(γ_{sat}=\frac{(G-e) γ_w}{(1+e)}\) |
| C. | \(γ_{sat}=\frac{(G+e) γ_w}{(1+e)}\) |
| D. | \(γ_{sat}=\frac{(G+e)}{(1+e)}\) |
| Answer» D. \(γ_{sat}=\frac{(G+e)}{(1+e)}\) | |
| 62. |
The relationship between γ’, G and e is ______ |
| A. | \(γ’=\frac{(G+1) γ_w}{(1+e)}\) |
| B. | \(γ’=\frac{(G-1) γ_w}{(1+e)}\) |
| C. | \(γ’=\frac{(G-1) γ_w}{(1-e)}\) |
| D. | \(γ’=\frac{G γ_w}{(1+e)}\) |
| Answer» C. \(γ’=\frac{(G-1) γ_w}{(1-e)}\) | |
| 63. |
In the densest state of packing, each sphere is in contact with ______ neighbouring spheres. |
| A. | 6 |
| B. | 12 |
| C. | 8 |
| D. | 18 |
| Answer» C. 8 | |
| 64. |
For a perfectly dry sample, the degree of saturation is equal to zero. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» B. False | |
| 65. |
The relationship between e, S and nₐ is ______ |
| A. | \(n_a=e*\frac{1+S}{1+e}\) |
| B. | \(n_a=e*\frac{1-S}{1-e}\) |
| C. | \(n_a=\frac{1-S}{1+e}\) |
| D. | \(n_a=e*\frac{1-S}{1+e}\) |
| Answer» E. | |
| 66. |
A soil sample has a dry density of 8.5 kN/m³, specific gravity of solids G as 2.7 and voids ratio of 0.6. If the unit weight of soil is 50% saturated, then its bulk unit weight will be ______ |
| A. | 19.274 kN/m³ |
| B. | 23.034 kN/m³ |
| C. | 20.554 kN/m³ |
| D. | 21.428 kN/m³ |
| Answer» D. 21.428 kN/m³ | |
| 67. |
For a fully saturated soil sample, the degree of saturation is ______ |
| A. | 0 |
| B. | 0.5 |
| C. | 0.8 |
| D. | 1 |
| Answer» E. | |
| 68. |
A soil has a void ratio of 0.6, specific gravity as 2.65 and degree of saturation as 50%. What will be its bulk unit weight? |
| A. | 17 kN/m³ |
| B. | 18 kN/m³ |
| C. | 19 kN/m³ |
| D. | 20 kN/m³ |
| Answer» C. 19 kN/m³ | |
| 69. |
A soil has a dry density of 17.5kN/m³. It has densities corresponding to most compact and loosest state as 18.5 kN/m³ and 13 kN/m³ respectively. The relative density of the soil is ______ |
| A. | 0.871 |
| B. | 0.865 |
| C. | 0.869 |
| D. | 0.860 |
| Answer» C. 0.869 | |
| 70. |
In the phase diagram, volumes are represented on the ________ |
| A. | left side |
| B. | right side |
| C. | top |
| D. | bottom |
| Answer» B. right side | |
| 71. |
The density index of natural deposit in its densest state is ______ |
| A. | 0 |
| B. | 0.5 |
| C. | 1 |
| D. | 1.5 |
| Answer» D. 1.5 | |
| 72. |
A soil sample weighs 190kN. After oven drying it weighs 150kN. What will be the weight of Water before oven drying? |
| A. | 35 kN |
| B. | 40 kN |
| C. | 30 kN |
| D. | 45 kN |
| Answer» C. 30 kN | |
| 73. |
The relationship between e, G, w and S is ______ |
| A. | \(e=\frac{wG}{S}\) |
| B. | e = wGS |
| C. | \(e=\frac{wS}{G}\) |
| D. | \(e=\frac{GS}{w}\) |
| Answer» B. e = wGS | |
| 74. |
The relationship between γd, G, w and S is_______ |
| A. | γd = G γw*(1+(\(\frac{wG}{S}\))) |
| B. | γd = G γw – (1+(\(\frac{wG}{S}\))) |
| C. | γd = G γw/(1+(\(\frac{wG}{S}\))) |
| D. | γd = G γw+(1+(\(\frac{wG}{S}\))) |
| Answer» D. γd = G γw+(1+(\(\frac{wG}{S}\))) | |
| 75. |
The porosity of cubic packing is ______ |
| A. | 42.66% |
| B. | 47.64% |
| C. | 25.95% |
| D. | 30.21% |
| Answer» C. 25.95% | |
| 76. |
If a soil has a void ratio of 0.6 and a specific gravity of 2.7, then its submerged unit weight will be ______ |
| A. | 9.678 |
| B. | 11.502 |
| C. | 9.256 |
| D. | 10.423 |
| Answer» E. | |
| 77. |
The volume of solids is represented as _______ in the phase diagram. |
| A. | Vᵥ |
| B. | Vw |
| C. | Vₛ |
| D. | Vₐ |
| Answer» D. Vₐ | |
| 78. |
The density index Iᴅ does not express the relative compactness of a natural cohesion-less soil. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» C. May be True or False | |
| 79. |
The relationship between γₛₐₜ, γd, γ and S is ______ |
| A. | γ = γd*S[γsat-γd] |
| B. | γ = \(\frac{γ_d}{S[γ_{sat}-γ_d]}\) |
| C. | γ = γd+S[γsat-γd] |
| D. | γ = γd-S[γsat-γd] |
| Answer» D. γ = γd-S[γsat-γd] | |
| 80. |
The range of degree of saturation is between 0 and 0.25 for a humid soil sample. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» B. False | |
| 81. |
The relationship between γ and γd can be derived when the degree of saturation is______ |
| A. | 0 |
| B. | 0.5 |
| C. | 0.8 |
| D. | 1 |
| Answer» B. 0.5 | |
| 82. |
If a solid has air content of 50%, then its degree of saturation will be ______ |
| A. | 40% |
| B. | 50% |
| C. | 30% |
| D. | 20% |
| Answer» C. 30% | |
| 83. |
The density index Iᴅ in terms of densities is given by ______ |
| A. | \(\frac{(γ_{d,max}-γ_{d,min}) γ_{d,max}}{(γ_{d,max}-γ_{d}) γ_d}\) |
| B. | \(\frac{(γ_d-γ_{d,min}) γ_{d,max}}{(γ_{d,max}-γ_{d,min}) γ_d}\) |
| C. | \(\frac{(γ_d-γ_{d,min}) γ_{d,max}}{(γ_d-γ_{d,max}) γ_d}\) |
| D. | \(\frac{(γ_d-γ_{d,min}) γ_{d,max}}{(γ_{d,max}-γ_{d}) γ_d}\) |
| Answer» C. \(\frac{(γ_d-γ_{d,min}) γ_{d,max}}{(γ_d-γ_{d,max}) γ_d}\) | |
| 84. |
The relative compaction Rc is given by _______ |
| A. | γd,max/γd |
| B. | γd/γd,min |
| C. | γd/γd,max |
| D. | γd,min/γd |
| Answer» D. γd,min/γd | |
| 85. |
A soil has a void ratio of 0.6 and a specific gravity of solids as 2.7. What will be its dry unit weight? |
| A. | 15.5 kN/m³ |
| B. | 16 kN/m³ |
| C. | 16.5 kN/m³ |
| D. | 17 kN/m³ |
| Answer» D. 17 kN/m³ | |
| 86. |
A soil has porosity of 40% and air content of 50%.What will be its percentage air voids? |
| A. | 30% |
| B. | 60% |
| C. | 20% |
| D. | 50% |
| Answer» D. 50% | |
| 87. |
What will be the porosity of a soil sample whose void ratio is 0.35? |
| A. | 19.5% |
| B. | 40.65% |
| C. | 25.9% |
| D. | 30% |
| Answer» D. 30% | |
| 88. |
When the soil is fully saturated with its specific gravity of solids G=2.7 and voids ratio e=0.667, its water content is ______ |
| A. | 0.326 |
| B. | 0.247 |
| C. | 0.543 |
| D. | 1 |
| Answer» C. 0.543 | |
| 89. |
A soil has a dry unit weight of 17.5 kN/m³ and a water content of 20%. What will be its bulk unit weight? |
| A. | 18 kN/m³ |
| B. | 19 kN/m³ |
| C. | 20 kN/m³ |
| D. | 21 kN/m³ |
| Answer» E. | |
| 90. |
The air content ratio is defined as the ratio of _____ |
| A. | volume of air voids to total volume of the soil mass |
| B. | volume of air voids to volume of total voids |
| C. | volume of air voids to volume of water |
| D. | volume of voids to total volume of the soil mass |
| Answer» C. volume of air voids to volume of water | |
| 91. |
The volume of solids in a unit cell is constant. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» B. False | |
| 92. |
The porosity of intermediate packing factor is given by ______ |
| A. | n = 1-[1/(6*(1-cosα)*( √(1-2cosα) )] |
| B. | n = (1-cosα)*( √(1+2cosα) ) |
| C. | n = 1-[π/(6*(1-cosα)*(√(1-2cosα))] |
| D. | n = 6*(1-cosα)*(√(1-2cosα)) |
| Answer» D. n = 6*(1-cosα)*(√(1-2cosα)) | |
| 93. |
The total weight of the moist sample is the sum of _______ |
| A. | Ww+Wd |
| B. | Wₐ+Ww |
| C. | Wₐ+Wd |
| D. | Wᵥ |
| Answer» B. Wₐ+Ww | |
| 94. |
For a fully saturated soil sample, the volume of voids is equal to _______ |
| A. | volume of air |
| B. | volume of water |
| C. | the volume of air and volume of water |
| D. | the volume of water and volume of solids |
| Answer» C. the volume of air and volume of water | |
| 95. |
A soil has a dry unit weight of 16.25 kN/m³ and saturated unit weight of 20 kN/m³. If the degree of saturation of soil is 50%, then its bulk unit weight will be ______ |
| A. | 20.748 kN/m³ |
| B. | 17.628 kN/m³ |
| C. | 18.123 kN/m³ |
| D. | 19.246 kN/m³ |
| Answer» D. 19.246 kN/m³ | |
| 96. |
The relationship between γd, γ and w is given by _______ |
| A. | γd = γ(1+w) |
| B. | γd = γ *(1+w) |
| C. | γd = \(\frac{γ}{(1+w)}\) |
| D. | γd = γ+1+w |
| Answer» D. γd = γ+1+w | |
| 97. |
When the soil is in loosest form, density index is zero and its relative compaction Rc is ______ |
| A. | 40% |
| B. | 60% |
| C. | 80% |
| D. | 100% |
| Answer» D. 100% | |
| 98. |
The relative compaction Rc is related to the void ratio of soil by _______ |
| A. | \(\frac{(1+e)}{(1+e_{max})}\) |
| B. | \(\frac{(1+e)}{(1+e_{min})}\) |
| C. | \(\frac{(1+e_{min})}{(1+e)}\) |
| D. | \(\frac{(1+e_{max})}{(1+e_{min})}\) |
| Answer» D. \(\frac{(1+e_{max})}{(1+e_{min})}\) | |
| 99. |
If a soil has a saturated unit weight of 24.5 kN/m³, then its submerged unit weight will be ______ |
| A. | 15.69 |
| B. | 14.69 |
| C. | 9.81 |
| D. | 20.61 |
| Answer» D. 20.61 | |
| 100. |
The minimum possible void ratio of uniformly graded spherical grains is _______ |
| A. | 0.20 |
| B. | 0.25 |
| C. | 0.30 |
| D. | 0.35 |
| Answer» E. | |