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MCQOPTIONS
This section includes 214 Mcqs, each offering curated multiple-choice questions to sharpen your Geotechnical Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
In Terzaghi’s Theory of one dimensional consolidation, Darcy’s law is _______ |
| A. | invalid |
| B. | valid |
| C. | invalid only for clays |
| D. | invalid only for gravel |
| Answer» C. invalid only for clays | |
| 2. |
In practical case under a finite surface loading the intensity σ’ ______ with depth of layer. |
| A. | decreases |
| B. | increases |
| C. | remains constant |
| D. | has negligible effect |
| Answer» B. increases | |
| 3. |
The coefficient of consolidation can be found by _____________ |
| A. | square root of time fitting method only |
| B. | logarithm of time fitting method only |
| C. | both square root of time fitting and logarithm of time fitting method |
| D. | no method is available |
| Answer» D. no method is available | |
| 4. |
For a soil at a given void ratio, the coefficient of compressibility _____________ |
| A. | increases with increase in magnitude of consolidating pressure |
| B. | increases with decreases in magnitude of consolidating pressure |
| C. | decreases with increase in magnitude of consolidating pressure |
| D. | decreases with increase in magnitude of hydrostatic pressure |
| Answer» B. increases with decreases in magnitude of consolidating pressure | |
| 5. |
For an ordinary clay of medium sensitivity, the value of compression index is _____ if liquid limit is 50%. |
| A. | 0.36 |
| B. | 0.45 |
| C. | 0.12 |
| D. | 0.64 |
| Answer» B. 0.45 | |
| 6. |
In many soil deposits, the secondary consolidation is neglected. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» B. False | |
| 7. |
The recompression index Cs is________ compared to compression index Cc for pre-consolidated soils. |
| A. | small |
| B. | very small |
| C. | large |
| D. | very large |
| Answer» C. large | |
| 8. |
Secondary consolidation starts in the range of primary consolidation itself. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» B. False | |
| 9. |
The logarithm of time fitting method was suggested by ______ |
| A. | Terzaghi |
| B. | Taylor |
| C. | Darcy |
| D. | A.Casagrande |
| Answer» E. | |
| 10. |
In polar form the term, \(\frac{∂θ}{∂y}\) is given by______ |
| A. | \(\frac{∂θ}{∂y}=\frac{sinθ}{r} \) |
| B. | \(\frac{∂θ}{∂y}=cosθsinθ\) |
| C. | \(\frac{∂θ}{∂y}=\frac{cosθ}{r}\) |
| D. | \(\frac{∂θ}{∂y}=\frac{sin2θ}{r}\) |
| Answer» D. \(\frac{∂θ}{∂y}=\frac{sin2θ}{r}\) | |
| 11. |
The abscissa at U=90% is roughly equal to ________ times the abscissa at U=60%. |
| A. | 0 |
| B. | 1.10 |
| C. | 1.15 |
| D. | 1.00 |
| Answer» D. 1.00 | |
| 12. |
The relation between difference in thickness and voids ratio is given by ___________ |
| A. | \(∆H = \frac{e_o-e}{1+e_o}\) |
| B. | \(\frac{∆H}{H_0} =\frac{e_o-e}{1+e_o}\) |
| C. | \(H_0 = \frac{e_o-e}{1+e_o}\) |
| D. | \(\frac{∆H}{H_0} = \frac{1}{1+e_o}\) |
| Answer» C. \(H_0 = \frac{e_o-e}{1+e_o}\) | |
| 13. |
For a time factor Tv of 0.159, Find the degree of consolidation. |
| A. | 45% |
| B. | 98% |
| C. | 34% |
| D. | 18% |
| Answer» B. 98% | |
| 14. |
The change in voids ratio method is applicable for _________________ |
| A. | only dry specimens |
| B. | only fully saturated specimens |
| C. | only partially saturated specimens |
| D. | for all types of specimens |
| Answer» C. only partially saturated specimens | |
| 15. |
In Terzaghi’s Theory of one dimensional consolidation, soil is considered to be __________ |
| A. | homogenous |
| B. | non-homogenous |
| C. | anisotropic |
| D. | heterogeneous |
| Answer» B. non-homogenous | |
| 16. |
The square root of time fitting method the theoretical graph is plotted between _____ |
| A. | \(\sqrt{T_v}\) is abscissa and U is ordinate |
| B. | U is abscissa and \(\sqrt{T_v}\) is abscissa |
| C. | Tv is abscissa and U is ordinate |
| D. | \(\sqrt[3]{T_v}\) is abscissa and U is ordinate |
| Answer» B. U is abscissa and \(\sqrt{T_v}\) is abscissa | |
| 17. |
If change in voids ratio is 0.18 and change in effective pressure is 100KN/m², then the coefficient of compressibility is ______ |
| A. | 2.5×10¯³ m²/kN |
| B. | 2×10¯³ m²/kN |
| C. | 9×10¯³ m²/kN |
| D. | 9.5×10¯³ m²/kN |
| Answer» C. 9×10¯³ m²/kN | |
| 18. |
At intermediate time t, the consolidating pressure is equal to ___________ |
| A. | ∆σ=σ+u̅ |
| B. | ∆σ=σ’ |
| C. | ∆σ=σ’+u̅ |
| D. | ∆σ=σ’-u̅ |
| Answer» D. ∆σ=σ’-u̅ | |
| 19. |
A clay sample in laboratory test has 24mm thickness. It is tested with double drainage and consolidated 50%. The clay layer from which sample was obtained is 4m thick. Find the time to consolidate 50% with double drainage. |
| A. | 365 days |
| B. | 386 days |
| C. | 750 days |
| D. | 150 days |
| Answer» C. 750 days | |
| 20. |
For n soil of height 2.08cm, coefficient of volume change mv=0.74 m²/MN. Find the settlement. |
| A. | 0.154cm |
| B. | 0.342cm |
| C. | 0.432cm |
| D. | 0.455cm |
| Answer» B. 0.342cm | |
| 21. |
The unit of coefficient of volume change is |
| A. | m²/kN |
| B. | m³/kN |
| C. | m²/N |
| D. | m³/N |
| Answer» B. m³/kN | |
| 22. |
Decrease in the volume of the soil is equal to _________ |
| A. | volume of water squeeze out |
| B. | volume of water entering the soil element |
| C. | volume of water leaving the soil element |
| D. | volume of soil in wet state |
| Answer» B. volume of water entering the soil element | |
| 23. |
In practical cases, the final consolidation settlement is calculated by the equation ___________ |
| A. | \(ρ_f=∫_0^H m_v Hdz\) |
| B. | \(ρ_f=∫_0^HH∆σ’dz\) |
| C. | \(ρ_f=∫_0^Hm_v H∆σ’ dz\) |
| D. | \(ρ_f=∫_0^Hm_v ∆σ’ dz\) |
| Answer» E. | |
| 24. |
For a remolded sample of clay with liquid limit of 45%, find its compression index. |
| A. | 0.753 |
| B. | 0.561 |
| C. | 0.493 |
| D. | 0.245 |
| Answer» E. | |
| 25. |
The use of square root of fitting method was suggested by ________ |
| A. | Terzaghi |
| B. | Taylor |
| C. | Darcy |
| D. | Skempton |
| Answer» C. Darcy | |
| 26. |
There is plastic readjustment of soil particles during _____________ |
| A. | pre-consolidation |
| B. | secondary consolidation |
| C. | under- consolidation |
| D. | normal- consolidation |
| Answer» C. under- consolidation | |
| 27. |
When the soil is laterally confined, the changes in volume is ______ |
| A. | proportional to change in thickness ∆H |
| B. | inversely proportional to change in thickness ∆H |
| C. | equal to change in thickness ∆H |
| D. | does not depend upon the thickness |
| Answer» B. inversely proportional to change in thickness ∆H | |
| 28. |
The relation between mᵥ and aᵥ is __________ |
| A. | \(m_v=\frac{a_v}{e_0} \) |
| B. | \(m_v=\frac{a_v}{1+∆σ’} \) |
| C. | \(m_v=\frac{a_v}{1+e_0} \) |
| D. | \(m_v=\frac{1}{e_0}\frac{a_v}{1+e_0} \) |
| Answer» D. \(m_v=\frac{1}{e_0}\frac{a_v}{1+e_0} \) | |
| 29. |
The coefficient of volume change mᵥ is also known as ______________ |
| A. | coefficient of compressibility |
| B. | coefficient of volume compressibility |
| C. | compression index |
| D. | expansion index |
| Answer» C. compression index | |
| 30. |
The term \(\frac{∂^2 \overline{u}}{∂x^2}+\frac{∂^2 \overline{u}}{∂y^2}\) in terms of r and θ is given by _______ |
| A. | \(\frac{∂^2 \overline{u}}{∂x^2}+\frac{∂^2 \overline{u}}{∂y^2}=\frac{∂^2 \overline{u}}{∂r^2}+\frac{1}{r} \frac{∂\overline{u}}{∂r}-\frac{1}{r^2}\frac{∂^2 \overline{u}}{∂θ^2}\) |
| B. | \(\frac{∂^2 \overline{u}}{∂x^2}+\frac{∂^2 \overline{u}}{∂y^2}=\frac{∂^2 \overline{u}}{∂r^2}+\frac{1}{r} \frac{∂\overline{u}}{∂r}+\frac{1}{r^2}\frac{∂^2 \overline{u}}{∂θ^2}\) |
| C. | \(\frac{∂^2 \overline{u}}{∂x^2}+\frac{∂^2 \overline{u}}{∂y^2}=\frac{∂^2 \overline{u}}{∂r^2}-\frac{1}{r} \frac{∂\overline{u}}{∂r}-\frac{1}{r^2}\frac{∂^2 \overline{u}}{∂θ^2}\) |
| D. | \(\frac{∂^2 \overline{u}}{∂x^2}+\frac{∂^2 \overline{u}}{∂y^2}=\frac{∂^2 \overline{u}}{∂r^2}-\frac{1}{r} \frac{∂\overline{u}}{∂r}+\frac{1}{c^2}\frac{∂^2 \overline{u}}{∂θ^2}\) |
| Answer» C. \(\frac{∂^2 \overline{u}}{∂x^2}+\frac{∂^2 \overline{u}}{∂y^2}=\frac{∂^2 \overline{u}}{∂r^2}-\frac{1}{r} \frac{∂\overline{u}}{∂r}-\frac{1}{r^2}\frac{∂^2 \overline{u}}{∂θ^2}\) | |
| 31. |
The integration of the equation \(ρ_f=∫_0^Hm_v ∆σ’dz\) can be performed by _____________ |
| A. | numerical method only |
| B. | graphical method only |
| C. | both numerical method and graphical method |
| D. | can not be performed |
| Answer» D. can not be performed | |
| 32. |
When the pre-consolidation pressure σₚ‘ is greater than initial effective pressure σ’₀ but smaller than effective pressure σ’, then the final settlement is calculated on the basis of ___________ |
| A. | settlement due to σ’₀ to σₚ‘ using Cₛ only |
| B. | settlement due to σₚ‘ to σ’ using Cc only |
| C. | settlement due to σ’₀ to σₚ‘ using Cₛ and settlement due to σₚ‘ to σ’ using Cc |
| D. | settlement due to σ’ to σₚ‘ using Cc and settlement due to σₚ‘ to σ’ using Cc |
| Answer» D. settlement due to σ’ to σₚ‘ using Cc and settlement due to σₚ‘ to σ’ using Cc | |
| 33. |
The voids ratio with respect to height of solids is given by equation______________ |
| A. | \(e=\frac{H}{H_s}\) |
| B. | \(e=\frac{H_s}{H}\) |
| C. | \(e=\frac{H+H_s}{H_s}\) |
| D. | \(e=\frac{H-H_s}{H_s}\) |
| Answer» E. | |
| 34. |
The term coefficient of consolidation Cᵥ used in equation is adopted to indicate the effect of permeability only. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» C. May be True or False | |
| 35. |
The consolidation settlement ρf for a soil stature of thickness H that has fully consolidated index, a pressure increment ∆σ’ with respect to mᵥ is given by ____________ |
| A. | ρf=mᵥ H |
| B. | ρf=H∆σ’ |
| C. | ρf=mᵥ H∆σ’ |
| D. | ρf=mᵥ ∆σ’ |
| Answer» D. ρf=mᵥ ∆σ’ | |
| 36. |
The minus sign in the change expression for change in thickness ∆H = -mᵥ H₀ ∆σ’ denotes ______ |
| A. | thickness decreases with increase in pressure |
| B. | thickness decreases with decrease in pressure |
| C. | thickness increases with increase in pressure |
| D. | thickness does not changewith increase in pressure |
| Answer» B. thickness decreases with decrease in pressure | |
| 37. |
The change in thickness due to pressure increment is given by ______ |
| A. | ∆H = -mᵥ H₀ ∆σ’ |
| B. | ∆H = -mᵥ ∆σ’ |
| C. | ∆H = -mᵥ H₀ |
| D. | ∆H = -H₀ ∆σ’ |
| Answer» B. ∆H = -mᵥ ∆σ’ | |
| 38. |
For a mass of 3.192g of soil with voids ratio 0.532, Find its saturated mass density. |
| A. | 2.084 g/cm³ |
| B. | 1.097 g/cm³ |
| C. | 3.593 g/cm³ |
| D. | 5.237 g/cm³ |
| Answer» B. 1.097 g/cm³ | |
| 39. |
The secondary consolidation is represented by __________ |
| A. | \(∆e = -α *\frac{t_1}{t_2}\) |
| B. | \(∆e = -α log_{10}\frac{t_2}{t_1}\) |
| C. | \(∆e = -log_{10}\frac{t_1}{t_2}\) |
| D. | ∆e = α log₁₀t₁ |
| Answer» C. \(∆e = -log_{10}\frac{t_1}{t_2}\) | |
| 40. |
The partial differentiation of velocity of water in soil element with respect to depth z in terms of coefficient of volume change is given by ____________ |
| A. | \(\frac{∂v}{∂z}=m_v \frac{∂^2 \overline{u}}{∂t^2}\) |
| B. | \(\frac{∂v}{∂z}=m_v \frac{\overline{u}}{∂t^2}\) |
| C. | \(\frac{∂v}{∂z}=\frac{∂^2 \overline{u}}{∂t^2}\) |
| D. | \(\frac{∂v}{∂z}=m_v \frac{∂\overline{u}}{∂t}\) |
| Answer» E. | |
| 41. |
In determination of pre-consolidation pressure ___________ point of virgin curve is selected. |
| A. | maximum curvature |
| B. | maximum radius |
| C. | minimum curvature |
| D. | initial point |
| Answer» B. maximum radius | |
| 42. |
From the coefficient of consolidation and coefficient of compressibility, the coefficient of permeability is found by equation __________ |
| A. | \(k=\frac{γ_w}{1+e_o} \) |
| B. | \(k=\frac{C_v a_v Aγ_w}{1+e_o} \) |
| C. | \(k=\frac{a_v γ_w}{1+e_o} \) |
| D. | \(k=\frac{C_v a_v γ_w}{1+e_o} \) |
| Answer» E. | |
| 43. |
The reference of consolidation test is in ____________ |
| A. | IS 800: 2007 |
| B. | IS 456: 2000 |
| C. | IS 2762 |
| D. | IS 2720 (Part 15): 1986 |
| Answer» E. | |
| 44. |
Two clay layer of A and B of thickness 2cm and 3 cm is load with pressure of 200KN/m². If the time taken by soil A to reach 50% consolidation is 1/4th of that required by soil B to reach 50% consolidation, then find the ratio of coefficients of Permeability. Given that ratio of coefficient of volume change is 1.751. |
| A. | 5.234 |
| B. | 2.456 |
| C. | 3.114 |
| D. | 4.233 |
| Answer» D. 4.233 | |
| 45. |
Who conducted consolidation test on a number of clays from different parts of the world? |
| A. | Terzaghi |
| B. | Taylor |
| C. | Skempton |
| D. | Darcy |
| Answer» D. Darcy | |
| 46. |
The logarithm of time fitting method is based on the characteristic of ______________ |
| A. | U and Tᵥ |
| B. | U and log₁₀Tᵥ |
| C. | Tᵥ |
| D. | log₁₀Tᵥ |
| Answer» C. Tᵥ | |
| 47. |
If a clay layer is expected to settle 12cm under loading settles 3cm at the end of one month, then find the degree of consolidation. |
| A. | 25% |
| B. | 50% |
| C. | 60% |
| D. | 56% |
| Answer» B. 50% | |
| 48. |
In 1935, solved the differential equation of consolidation by radial flow to a well. |
| A. | Rendulic |
| B. | Skempton |
| C. | Taylor |
| D. | Darcy |
| Answer» B. Skempton | |
| 49. |
To find pre-consolidation pressure __________ relationship in graph is plotted. |
| A. | voids ratio and effective pressure |
| B. | effective pressure and total pressure |
| C. | effective pressure and pore pressure |
| D. | total pressure and total pressure |
| Answer» B. effective pressure and total pressure | |
| 50. |
From the calculations consideration of a consolidation test data, the change in thickness can be both positive and negative. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» B. False | |