McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: Civil Engineering .
| 1. |
Consolidation and compressibility of soil |
| A. | is a measure of the ability of soil to allow the water to pass through its pores |
| B. | is a measure of the ability of soil to bear stresses without failure |
| C. | deals with changes in volume of pores in a soil under load |
| D. | any one of the above |
| Answer» C. deals with changes in volume of pores in a soil under load | |
| 2. |
The minimum size of grains of silts is about |
| A. | 0.0002 mm |
| B. | 0.002 mm |
| C. | 0.02 mm |
| D. | 0.2 mm |
| Answer» A. 0.0002 mm | |
| 3. |
Quich sand is a |
| A. | moist sand containing small particles |
| B. | condition which occurs in coarse sand |
| C. | condition in which a cohesionless soil loses at its strength because of upward flow of water |
| D. | none of the above |
| Answer» C. condition in which a cohesionless soil loses at its strength because of upward flow of water | |
| 4. |
Submerged soils are |
| A. | partially |
| B. | fully |
| Answer» B. fully | |
| 5. |
The unit bearing capacity of footing in sand |
| A. | decreases with depth of footing |
| B. | decreses with width of footing |
| C. | increases with depth of footing |
| D. | increases with width of footing |
| Answer» C. increases with depth of footing | |
| 6. |
The specific gravity of sandy soils is |
| A. | 1.2 |
| B. | 1.8 |
| C. | 2.2 |
| D. | 2.7 |
| Answer» D. 2.7 | |
| 7. |
The active earth pressure of a soil is defined as the lateral pressure exerted by soil |
| A. | when it is at rest |
| B. | when the retaining wall has no movement relative to the back fill |
| C. | when the retaining wall tends to move away from the back fill |
| D. | when the retaining wall moves into the soil |
| Answer» C. when the retaining wall tends to move away from the back fill | |
| 8. |
Cohesionless soils are |
| A. | sands |
| B. | clays |
| C. | silts |
| D. | silts and clays |
| Answer» A. sands | |
| 9. |
The process of maintaining or improving the performance of a soil as a constructional material, usually by the use of admixtures, is known as |
| A. | soil exploration |
| B. | soil stabilisation |
| C. | soil compaction |
| D. | consolidation |
| Answer» B. soil stabilisation | |
| 10. |
The permeability of a given soil is |
| A. | directly proportional to the average grain size |
| B. | inversely proportional to the average grain size |
| C. | directly proportional to the square of the average grain size |
| D. | inversely proportional to the square of the average grain size |
| Answer» C. directly proportional to the square of the average grain size | |
| 11. |
A line showing the dry density as a function of water content for soil containing no air voids, is called |
| A. | saturation line |
| B. | zero air void line |
| C. | liquid limit line |
| D. | none of these |
| Answer» B. zero air void line | |
| 12. |
The hydraulic gradient provided at the downstream side of a hydraulic structure such as a dam, is called |
| A. | downstream gradient |
| B. | tail water gradient |
| C. | exit gradient |
| D. | any one of these |
| Answer» D. any one of these | |
| 13. |
The dry sand specimen is put through a triaxial test. The cell pressure is 50 kPa and the deviator stress at failure is 100 kPa. The angle of internal friction for the sand specimen is |
| A. | 15? |
| B. | 30? |
| C. | 35? |
| D. | 40? |
| Answer» B. 30? | |
| 14. |
The lateral earth pressure exerted by the soil when the retaining wall moves into the soil, is known as |
| A. | earth pressure at rest |
| B. | active earth pressure |
| C. | passive earth pressure |
| D. | total earth pressure |
| Answer» C. passive earth pressure | |
| 15. |
Hydrometer analysis is used to determine the density of soil suspension. |
| A. | Agree |
| B. | Disagree |
| Answer» A. Agree | |
| 16. |
The uniformity co-efficient of soil is defined as the ratio of |
| A. | D40 to D10 |
| B. | D40 to D20 |
| C. | D50 to D10 |
| D. | D60 to D10 |
| Answer» D. D60 to D10 | |
| 17. |
Which of the following gives the correct decreasing order of the densities of a soil sample? |
| A. | Saturated, submerged, wet, dry |
| B. | Saturated, wet, submerged, dry |
| C. | Saturated, wet, dry, submerged |
| D. | Wet, saturated, submerged, dry |
| Answer» C. Saturated, wet, dry, submerged | |
| 18. |
The effective stress on the soil mass |
| A. | increases |
| B. | decreases |
| Answer» B. decreases | |
| 19. |
The ultimate net bearing capacity lay depends upon the value of cohesion. |
| A. | Agree |
| B. | Disagree |
| Answer» A. Agree | |
| 20. |
The ratio of the unit weight of soil solids to that of water is called |
| A. | void ratio |
| B. | porosity |
| C. | specific gravity |
| D. | degree of saturation |
| Answer» C. specific gravity | |
| 21. |
When the water table is under the base of the footing at a depth equal to half of the width of the footing, the bearing capacity of a soil is reduced to |
| A. | one-fourth |
| B. | one-half |
| C. | two-third |
| D. | three-fourth |
| Answer» B. one-half | |
| 22. |
The net ultimate bearing capacity is the maximum net pressure intensity causing shear failure of soil. |
| A. | True |
| B. | False |
| Answer» A. True | |
| 23. |
Talus' is a soil transported by glacial water. |
| A. | Right |
| B. | Wrong |
| Answer» B. Wrong | |
| 24. |
The compression index of the soil |
| A. | increases with the increase in liquid limit |
| B. | decreases with the increase in liquid limit |
| C. | increases with the decrease in plastic limit |
| D. | decreases with the increase in plastic limit |
| Answer» A. increases with the increase in liquid limit | |
| 25. |
The critical gradient of the seepage of water |
| A. | directly proportional to void ratio |
| B. | increases with the decrease in void ratio |
| C. | inversely proportional to specific gravity |
| D. | increases with the decrease in specific gravity of soil |
| Answer» B. increases with the decrease in void ratio | |
| 26. |
The settlement of a footing in sand depends upon the |
| A. | stress deformation characteristics of sand |
| B. | relative density of the sand |
| C. | width of the footing |
| D. | all of these |
| Answer» D. all of these | |
| 27. |
The bearing capacity of a soil |
| A. | increases |
| B. | decreases |
| C. | does not change |
| Answer» A. increases | |
| 28. |
A soil with consistency equal to one is at its |
| A. | liquid |
| B. | plastic |
| Answer» B. plastic | |
| 29. |
The angle of internal friction |
| A. | varies with the density of sand |
| B. | depends upon the amount of interlocking |
| C. | depends upon the particle shape and roughness |
| D. | all of the above |
| Answer» D. all of the above | |
| 30. |
Which of the following clay mineral gives maximum swelling? |
| A. | Kalonite |
| B. | Montmorillonite |
| C. | Illite |
| D. | all of these |
| Answer» B. Montmorillonite | |
| 31. |
The uniformity coefficient for a uniformly graded soil is nearly unity. |
| A. | Agree |
| B. | Disagree |
| Answer» A. Agree | |
| 32. |
The degree of saturation for the moist soil is about |
| A. | 0% |
| B. | 1 to 25% |
| C. | 25 to 50% |
| D. | 50 to 75% |
| Answer» D. 50 to 75% | |
| 33. |
The submerged or buoyant unit weight of soil is equal to the |
| A. | sum |
| B. | difference |
| C. | product |
| D. | ratio |
| Answer» B. difference | |
| 34. |
The contact pressure of flexible footing on no-choesive soils is |
| A. | more in the centre than at the edges |
| B. | less in the centre than at the edges |
| C. | uniform throughout |
| D. | none of these |
| Answer» A. more in the centre than at the edges | |
| 35. |
The seepage pressure is independent of the coefficient of permeability. |
| A. | Correct |
| B. | Incorrect |
| Answer» A. Correct | |
| 36. |
The plastic limit of a soil is defined as the |
| A. | limit of water that makes the soil to flow |
| B. | amount of water content which makes the soil to go into the liquid state |
| C. | amount of water content which makes the soil to go into the solid state from the liquid state |
| D. | minimum amount of water content which makes the soil to be rolled into 3 mm diameter threads |
| Answer» D. minimum amount of water content which makes the soil to be rolled into 3 mm diameter threads | |
| 37. |
The decrease in voids ratio per unit increse of presure is called |
| A. | coefficient of permeability |
| B. | coefficient of compressibility |
| C. | coefficient of volume compressibility |
| D. | coefficient of curvature |
| Answer» B. coefficient of compressibility | |
| 38. |
The maximum size of grains of silts is about |
| A. | 0.06 mm |
| B. | 0.2 mm |
| C. | 0.5 mm |
| D. | 1 mm |
| Answer» A. 0.06 mm | |
| 39. |
Which of the following statement is wrong? |
| A. | The neutral stress does not change the shearing resistance of the soil. |
| B. | The decrease in effective stress is accompanied by increase in the neutral stress. |
| C. | The neutral stress does not decrease the void ratio. |
| D. | none of the above |
| Answer» D. none of the above | |
| 40. |
The frictional resistance of clayey soil is |
| A. | less than |
| B. | more than |
| C. | same as |
| Answer» A. less than | |
| 41. |
The coefficient of compressibility |
| A. | increases |
| B. | decreases |
| C. | does not change |
| Answer» B. decreases | |
| 42. |
If the coefficient of passive earth pressure is 1/3, then the coefficient of active earth pressure is |
| A. | 1?3 |
| B. | 1 |
| C. | 3?2 |
| D. | 3 |
| Answer» C. 3?2 | |
| 43. |
The lateral earth pressure is |
| A. | directly proportional to the depth of soil |
| B. | inversely proportional to the depth of soil |
| C. | directly proportional to the squre of the depth of soil |
| D. | inversely proportional to the square of the depth of soil |
| Answer» C. directly proportional to the squre of the depth of soil | |
| 44. |
The net soil pressure is obtained by multiplying the net ultimate bearing capacity of soil to the factor of safety. |
| A. | Right |
| B. | Wrong |
| Answer» B. Wrong | |
| 45. |
The maximum size of the particles of clay is about |
| A. | 0.0002 mm |
| B. | 0.002 mm |
| C. | 0.02 mm |
| D. | 0.2 mm |
| Answer» B. 0.002 mm | |
| 46. |
The angle of internal friction of round grained loose sand is about |
| A. | 5? to 25? |
| B. | 25? to 30? |
| C. | 30? to 35? |
| D. | 32? to 37? |
| Answer» B. 25? to 30? | |
| 47. |
A soil having particles of nearly the same size is known as |
| A. | uniform soil |
| B. | poor soil |
| C. | well graded soil |
| D. | coarse soil |
| Answer» A. uniform soil | |
| 48. |
The dense sands have |
| A. | greater |
| B. | lesser |
| Answer» A. greater | |
| 49. |
The unconfined compressive strength of a very hard clay is |
| A. | 10 to 25 kN/m2 |
| B. | 25 to 150 kN/m2 |
| C. | 150 to 400 kN/m2 |
| D. | Above 400 kN/m2 |
| Answer» D. Above 400 kN/m2 | |
| 50. |
The sensitivity of a normal clay is about |
| A. | 2 to 4 |
| B. | 4 to 8 |
| C. | 8 to 15 |
| D. | 15 to 20 |
| Answer» A. 2 to 4 | |
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