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.
| 1. |
The drawdown curve in fully penetrated slot is based on the assumptions of _____________ |
| A. | Dupuit and Forchheimer |
| B. | Darcy |
| C. | None of the mentioned |
| D. | All of the mentioned |
| Answer» B. Darcy | |
| 2. |
For fine-grained soil what type of dewatering system can be used? |
| A. | Electro-osmosis method |
| B. | Shallow well system |
| C. | Deep well system |
| D. | Vacuum method |
| Answer» E. | |
| 3. |
The application of electro-osmosis on dewatering of soil was developed by ___________ |
| A. | L. casagrande |
| B. | Darcy |
| C. | Chapmen |
| D. | Dupuit |
| Answer» B. Darcy | |
| 4. |
In discharge equation given by chapmen qp=kba(H-ho)/L+EA, EA refers to __________ |
| A. | Coefficient of permeability |
| B. | Electric gradient |
| C. | Extra length factor |
| D. | Efficiency of permeability of soil |
| Answer» D. Efficiency of permeability of soil | |
| 5. |
When dewatering system consist of number of well-points ___________ can be considered for a simplified solution. |
| A. | Linear drainage limit |
| B. | Seepage analysis |
| C. | Flow of water |
| D. | All of the mentioned |
| Answer» B. Seepage analysis | |
| 6. |
A complete design of dewatering system consist of ___________ |
| A. | Spacing of wells |
| B. | Penetration of wells |
| C. | Pumping capacities |
| D. | All of the mentioned |
| Answer» E. | |
| 7. |
Discharge for a unconfined aquifer can be found from the expression developed by __________ |
| A. | Dupuit |
| B. | Darcy |
| C. | Chapman |
| D. | Baron |
| Answer» D. Baron | |
| 8. |
Fine grained cohesive soil can be drained or stabilized by __________ |
| A. | Vacuum method |
| B. | Electro-osmosis method |
| C. | Shallow well system |
| D. | Well point system |
| Answer» C. Shallow well system | |
| 9. |
The seepage analysis is done on the assumption of ____________ |
| A. | Flow is laminar and Darcy’s law is valid |
| B. | Seepage of water |
| C. | None of the mentioned |
| D. | All of the mentioned |
| Answer» B. Seepage of water | |
| 10. |
A flow line in seepage through a soil medium is defined as the |
| A. | Path of particles of water through saturated soil mass |
| B. | Line connecting points of equal head of water |
| C. | Flow of movement of fine particles of soil |
| D. | Direction of the flow particle |
| Answer» B. Line connecting points of equal head of water | |
| 11. |
A phreatic line is defined as the line within a dam section below which there is/are- |
| A. | Negative equipotential lines |
| B. | Positive hydrostatic pressure |
| C. | Positive equipotential lines |
| D. | Negative hydrostatic pressure |
| Answer» C. Positive equipotential lines | |
| 12. |
Consider the following statements:1. A braced coffer dam is used in shallow trench excavation as well as in deep excavation exceeding 6 m in depth.2. Coffer dams, braced or un-braced, are temporary structures either on land or in water bodies.3. When sheet piling is used for retaining soil, or soil and water, without any bracing, it is called a bulkhead.Which of the above statements are correct? |
| A. | 1, 2 and 3 |
| B. | 1 and 2 only |
| C. | 1 and 3 only |
| D. | 2 and 3 only |
| Answer» E. | |
| 13. |
Impending boiling of soil occurs when the critical gradient is equal to |
| A. | twice the void ratio |
| B. | infinity |
| C. | zero |
| D. | unity |
| Answer» E. | |
| 14. |
A soil has a discharge velocity of 6 × 10-7 m/s and a void ratio of 0.5. What is its seepage velocity? |
| A. | 3 × 10-7 m/s |
| B. | 6 × 10-7 m/s |
| C. | 12 × 10-7 m/s |
| D. | 18 × 10-7 m/s |
| Answer» E. | |
| 15. |
A coarse-gained soil has a void ratio of 0.78 and specific gravity as 2.67. The critical gradient at which a quick sand condition occurs will be |
| A. | 0.62 |
| B. | 0.74 |
| C. | 0.82 |
| D. | 0.94 |
| Answer» E. | |
| 16. |
Ground water flows through an aquifer with a cross-sectional area of 1.0 × 104 m2 and a length of 1500 m. Hydraulic beads are 300 m and 250 m at the ground water entry and exit points in the aquifer respectively. Ground water discharge into stream is at the rate of 1500 m3/day. The corresponding hydraulic conductivity of this aquifer will be |
| A. | 3.5 m/day |
| B. | 4.5 m/day |
| C. | 5.0 m/day |
| D. | 5.5 m/day |
| Answer» C. 5.0 m/day | |
| 17. |
A flow net may be utilized for the determination of: |
| A. | Hydrostatic pressure only |
| B. | Seepage only |
| C. | Exit gradient only |
| D. | All of the above |
| Answer» E. | |
| 18. |
A unit volume of a mass saturated soil is subjected to horizontal seepage. The saturated unit weight is 22 kN/m3 and the hydraulic gradient is 0.3 the resultant body force on the soil mass is ______. |
| A. | 6.6 kN |
| B. | 22.97 kN |
| C. | 1.98 kN |
| D. | 12.54 kN |
| Answer» E. | |
| 19. |
In a soil specimen, the total stress, effective stress, hydraulic gradient, and critical hydraulic gradient are σ, σ’, i and ic, respectively. For initiation of quicksand condition, which one of the following statements is TRUE? |
| A. | σ’ = 0 and i = iC |
| B. | σ = 0 and i = iC |
| C. | σ’ ≠ 0 and i = iC |
| D. | σ’ ≠ 0 and i ≠ iC |
| Answer» B. σ = 0 and i = iC | |
| 20. |
A flownet of a cofferdam foundation has 6 flow channels and 18 equipotential drops. The head loss during seepage is 6 m. If the coefficient of permeability of soil is 4 x 10-5 m/min, then the seepage loss (m3/day) is |
| A. | 72 |
| B. | 8 |
| C. | 0.115 |
| D. | 1.037 |
| Answer» D. 1.037 | |
| 21. |
A flow net is used to determine the following:- |
| A. | Seepage and exist gradient only |
| B. | Seepage, coefficient of permeability and exit gradient |
| C. | Seepage, exist gradient and uplift pressure |
| D. | Seepage, coefficient of permeability and uplift pressure |
| Answer» D. Seepage, coefficient of permeability and uplift pressure | |
| 22. |
A flow net is drawn to obtain |
| A. | exit gradient, seepage and coefficient of permeability |
| B. | exit gradient, uplift pressure and seepage |
| C. | coefficient of permeability, uplift pressure and exit gradient |
| D. | seepage, coefficient of permeability and uplift pressure |
| Answer» C. coefficient of permeability, uplift pressure and exit gradient | |
| 23. |
Flow between any two points in a soil depends only on the difference in |
| A. | Pressure head |
| B. | Total head |
| C. | Velocity head |
| D. | Datum head |
| Answer» C. Velocity head | |
| 24. |
In a fully saturated soil, Skempton’s pore pressure parameter B becomes equal to |
| A. | 0 |
| B. | 0.5 |
| C. | 0.75 |
| D. | 1.0 |
| Answer» E. | |
| 25. |
In the graphical method of obtaining flow nets, if the lowest flow line confirms to the bottom boundary conditions, the flow net: |
| A. | Is correct |
| B. | Needs a small adjustment |
| C. | Needs a bigger adjustment |
| D. | Can't be corrected |
| Answer» B. Needs a small adjustment | |
| 26. |
For laminar flow conditions in saturated soils, the rate of percolation is ______ the hydraulic gradient. |
| A. | directly proportional to |
| B. | inversely proportional to |
| C. | directly proportional to the square of |
| D. | inversely proportional to the square of |
| Answer» B. inversely proportional to | |
| 27. |
Who was the first to give a graphical method of flow net construction? |
| A. | Casagrande |
| B. | Darcy |
| C. | Forchheimer |
| D. | Kozney |
| Answer» D. Kozney | |
| 28. |
What kind of method was suggested by Casagrande, for determining the phreatic line? |
| A. | Experimental method |
| B. | Analytical method |
| C. | Graphical method |
| D. | All of the mentioned |
| Answer» D. All of the mentioned | |
| 29. |
The flow lines and equipotential lines are ____________ |
| A. | Parallel |
| B. | Perpendicular |
| C. | Elliptical |
| D. | All of the mentioned |
| Answer» C. Elliptical | |
| 30. |
The focus in an earth dam with no filter is ________ |
| A. | lowest point of d/s slope |
| B. | highest point of d/s slope |
| C. | high flood level |
| D. | medium flood level |
| Answer» B. highest point of d/s slope | |
| 31. |
What will be the hydrostatic pressure if, hW = 30% and Z = 10%? |
| A. | 30% |
| B. | 10% |
| C. | 40% |
| D. | 50% |
| Answer» D. 50% | |
| 32. |
The base parabola is the ________ |
| A. | top flow line |
| B. | middle flow line |
| C. | bottom flow line |
| D. | ¼ of top flow line |
| Answer» B. middle flow line | |
| 33. |
The analytical solution of schaffernak and Van Iterson gave result only for slopes, having __________ |
| A. | α>30° |
| B. | α<30° |
| C. | α>60° |
| D. | α<60° |
| Answer» C. α>60° | |
| 34. |
If a fully saturated soil mass has a water content of 100%, then its void ratio is _________ |
| A. | less than the specific gravity |
| B. | greater than the specific gravity |
| C. | equal to specific gravity |
| D. | does not depend on specific gravity |
| Answer» D. does not depend on specific gravity | |
| 35. |
For an anisotropic soil ________ is true. |
| A. | kₓ≠kᵧ |
| B. | kₓ+kᵧ=0 |
| C. | kₓ-kᵧ=0 |
| D. | kₓ/kᵧ=1 |
| Answer» B. kₓ+kᵧ=0 | |
| 36. |
The laplacian form of equation for anisotropic soil is ______ |
| A. | \(\frac{∂^2 h}{∂x^2}+\frac{∂^2 h}{∂y^2}=0\) |
| B. | \(k_x \frac{∂^2 h}{∂x^2}+\frac{∂^2 h}{∂y^2}=0\) |
| C. | \(\frac{∂^2 h}{∂x^2}+k_y\frac{∂^2 h}{∂y^2}=0\) |
| D. | \(\frac{k_x}{k_y}\frac{∂^2 h}{∂x^2}+\frac{∂^2 h}{∂y^2}=0\) |
| Answer» E. | |
| 37. |
Kozney’s top flow lines is called as ____________ |
| A. | Basic and Base parabola |
| B. | Simple parabola |
| C. | None of the mentioned |
| D. | All of the mentioned |
| Answer» B. Simple parabola | |
| 38. |
Which of the following is similar to that of khosla’s theory? |
| A. | Darcy’s theory |
| B. | Terzaghi’s theory |
| C. | Bligh’s theory |
| D. | Haigh theory |
| Answer» D. Haigh theory | |
| 39. |
A coarse-grained soil has a voids ratio of 0.66 and specific gravity G of 2.65. What will be its critical hydraulic gradient? |
| A. | 0.99 |
| B. | 0.88 |
| C. | 0.77 |
| D. | 0.66 |
| Answer» B. 0.88 | |
| 40. |
If a soil has a submerged unit weight of 10.69 kN/m³, what will be its critical hydraulic gradient? |
| A. | 1.09 |
| B. | 0.88 |
| C. | 1.77 |
| D. | 1.66 |
| Answer» B. 0.88 | |
| 41. |
What are the essentials, required to draw a flow net? |
| A. | Top Flow and Phreatic line |
| B. | Stream line |
| C. | None of the mentioned |
| D. | All of the mentioned |
| Answer» B. Stream line | |
| 42. |
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 per unit volume? |
| A. | 4.9 kN/m³ |
| B. | 3.9 kN/m³ |
| C. | 4.1 kN/m³ |
| D. | 3.2 kN/m³ |
| Answer» B. 3.9 kN/m³ | |
| 43. |
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. The submerged unit weight γ’=9.59 kN/m³. Calculate the effective pressure if flow is in upward direction. |
| A. | 50.76 kN/m² |
| B. | 52.34 kN/m² |
| C. | 55.34 kN/m² |
| D. | 56.22 kN/m² |
| Answer» E. | |
| 44. |
The solution of velocity potential φ can be obtained by which of the following methods? |
| A. | Analytical methods |
| B. | Graphical methods |
| C. | Experimental methods |
| D. | All of the mentioned |
| Answer» E. | |
| 45. |
According to theory of flow of fluids through porous medium, the saturated porous medium is ___________ |
| A. | Compressible |
| B. | Incompressible |
| C. | Moderately compressible |
| D. | Highly compressible |
| Answer» C. Moderately compressible | |
| 46. |
If a soil has a voids ratio of 0.68 and water percolating through it has a discharge velocity of 1.35*10¯²cm/s. Calculate its seepage velocity. |
| A. | 1.35*10¯²cm/s |
| B. | 2.35*10¯²cm/s |
| C. | 3.34*10¯²cm/s |
| D. | 1.05*10¯²cm/s |
| Answer» D. 1.05*10¯²cm/s | |
| 47. |
If the discharge velocity is 1.35*10¯²cm/s and seepage velocity is 3.95*10¯²cm/s of water through a soil, then what will be its voids ratio? |
| A. | 0.32 |
| B. | 0.43 |
| C. | 0.52 |
| D. | 0.66 |
| Answer» D. 0.66 | |
| 48. |
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. The submerged unit weight γ’=9.59 kN/m³. Calculate the effective pressure if flow is in downward direction. |
| A. | 73.94 kN/m² |
| B. | 152.34 kN/m² |
| C. | 155.34 kN/m² |
| D. | 173.94 kN/m² |
| Answer» E. | |
| 49. |
The elevation head is taken as negative if the point is situated above the datum and positive if below the datum. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» C. May be True or False | |
| 50. |
The phreatic line is the ________ |
| A. | top flow line separating saturated and unsaturated zones |
| B. | middle flow line separating saturated and unsaturated zones |
| C. | bottom flow line separating saturated and unsaturated zones |
| D. | bottom flow line separating saturated and partially saturated zones |
| Answer» B. middle flow line separating saturated and unsaturated zones | |