McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: Civil Engineering .
| 1. |
Rise of water table above the ground surface causes |
| A. | Equal increase in pore water pressure and total stress |
| B. | Equal decrease in pore water pressure and total stress |
| C. | Increase in pore water pressure but decrease in total stress |
| D. | Decrease in pore water pressure but increase in total |
| Answer» A. Equal increase in pore water pressure and total stress | |
| 2. |
If the material of the base of the Casagrande liquid limit device on which the cup containing soil paste drops is softer than the standard hard rubber, then |
| A. | The liquid limit of soil always increases |
| B. | The liquid limit of soil always decreases |
| C. | The liquid limit of soil may increase |
| D. | The liquid limit of soil may decrease |
| Answer» A. The liquid limit of soil always increases | |
| 3. |
A triaxial shear test is preferred to direct shear test, because |
| A. | It can be performed under all three drainage conditions with complete control |
| B. | Precise measurement of pore pressure and change in volume during test, is not possible |
| C. | Stress distribution on the failure plane, is non uniform |
| D. | None of these |
| Answer» A. It can be performed under all three drainage conditions with complete control | |
| 4. |
The average coefficient of permeability of natural deposits |
| A. | Parallel to stratification is always greater than that perpendicular to stratification |
| B. | Parallel to stratification is always less than that perpendicular to stratification |
| C. | Is always same in both directions |
| D. | Parallel to stratification may or may not be greater than that perpendicular to stratification |
| Answer» A. Parallel to stratification is always greater than that perpendicular to stratification | |
| 5. |
Pick up the correct statement from the following: |
| A. | The dry density reduces by addition of water after attaining optimum moisture content |
| B. | The line joining the peak of three moisture content graphs obtained by using three compactive energies, is called line of optimus |
| C. | Well graded coarse grained soils can be compacted to a very high density as compared to fine grained soils |
| D. | All the above |
| Answer» D. All the above | |
| 6. |
The shear strength of a soil |
| A. | Is directly proportional to the angle of internal friction of the soil |
| B. | Is inversely proportional to the angle of internal friction of the soil |
| C. | Decreases with increase in normal stress |
| D. | Decreases with decrease in normal stress |
| Answer» D. Decreases with decrease in normal stress | |
| 7. |
Pick up the correct statement from the following: |
| A. | The object of classifying soils is to arrange them into groups according to their properties and behaviour |
| B. | A soil classification system is meant to provide an accepted and systematic method of describing the various types of soils eliminating personal factors |
| C. | The first category of soil classification is based on grain size of the soil |
| D. | All the above |
| Answer» D. All the above | |
| 8. |
The major principal stress in an element of cohesion-less soil within the backfill of a retaining wall is |
| A. | Vertical if the soil is in an active state of plastic equilibrium |
| B. | Vertical if the soil is in a passive state of plastic equilibrium |
| C. | Inclined at 45° to the vertical plane |
| D. | None of the above |
| Answer» A. Vertical if the soil is in an active state of plastic equilibrium | |
| 9. |
A grillage foundation |
| A. | Is provided for heavily loaded isolated columns |
| B. | Is treated as spread foundation |
| C. | Consists of two sets of perpendicularly placed steel beams |
| D. | All the above |
| Answer» D. All the above | |
| 10. |
Effective stress on soil |
| A. | Increases voids ratio and decreases permeability |
| B. | Increases both voids ratio and permeability |
| C. | Decreases both voids ratio and permeability |
| D. | Decreases voids ratio and increases permeability |
| Answer» C. Decreases both voids ratio and permeability | |
| 11. |
Hydrometer readings are corrected for: |
| A. | Temperature correction |
| B. | Meniscus correction |
| C. | Dispersing agent correction |
| D. | Temperature, meniscus and dispersing agent corrections |
| Answer» D. Temperature, meniscus and dispersing agent corrections | |
| 12. |
The ultimate consolidation settlement of a structure resting on a soil |
| A. | Decreases with the increase in the initial voids ratio |
| B. | Decreases with the decrease in the plastic limit |
| C. | Increases with the increase in the initial voids ratio |
| D. | Increases with the decrease in the porosity of the soil |
| Answer» A. Decreases with the increase in the initial voids ratio | |
| 13. |
Select the incorrect statement. |
| A. | In a direct shear box test, the plane of shear failure is predetermined |
| B. | Better control is achieved on the drainage of the soil in a triaxial compression test |
| C. | Stress distribution on the failure plane in the case of triaxial compression test is uniform |
| D. | Unconfined compression test can be carried out on all types of soils |
| Answer» D. Unconfined compression test can be carried out on all types of soils | |
| 14. |
The angle of internal friction, is least for |
| A. | Angular-grained loose sand |
| B. | Angular -grained dense sand |
| C. | Round-grained loose sand |
| D. | Clays |
| Answer» D. Clays | |
| 15. |
Dispersed type of soil structure is an arrangement comprising particles having |
| A. | Face to face or parallel orientation |
| B. | Edge to edge orientation |
| C. | Edge to face orientation |
| D. | All of the above |
| Answer» A. Face to face or parallel orientation | |
| 16. |
The neutral stress in a soil mass is |
| A. | Force per neutral area |
| B. | Force per effective area |
| C. | Stress taken up by the pore water |
| D. | Stress taken up by solid particles |
| Answer» C. Stress taken up by the pore water | |
| 17. |
The coefficient of compressibility of soil, is the ratio of |
| A. | Stress to strain |
| B. | Strain to stress |
| C. | Stress to settlement |
| D. | Rate of loading to that of settlement |
| Answer» B. Strain to stress | |
| 18. |
A clay subjected to pressure in excess to its present over-burden, is said to be |
| A. | Pre-compressed |
| B. | Pre-consolidated |
| C. | Over-consolidated |
| D. | All the above |
| Answer» D. All the above | |
| 19. |
Physical properties of a permeant which influence permeability are |
| A. | Viscosity only |
| B. | Unit weight only |
| C. | Both viscosity and unit weight |
| D. | None of the above |
| Answer» C. Both viscosity and unit weight | |
| 20. |
Pick up the correct statement from the following: |
| A. | The range of water content between the liquid limit and plastic limit is called plasticity index |
| B. | The ratio of the liquid limit minus the natural water content to the plasticity index of soils, is called consistency index |
| C. | The ratio of natural water content minus its plastic limit to its plasticity index is called liquidity index |
| D. | All the above |
| Answer» D. All the above | |
| 21. |
Rankine's theory of active earth pressure assumes |
| A. | Soil mass is homogeneous, dry and cohesionless |
| B. | Ground surface is a plane which may be horizontal or inclined |
| C. | Back of the wall is vertical and smooth |
| D. | All the above |
| Answer» D. All the above | |
| 22. |
For testing a saturated clay for shear strength, the test recommended, is |
| A. | Direct shear test |
| B. | Triaxial compression test |
| C. | Unconfined compression test |
| D. | All the above |
| Answer» C. Unconfined compression test | |
| 23. |
Coefficient of permeability of soil |
| A. | Does not depend upon temperature |
| B. | Increases with the increase in temperature |
| C. | Increases with the decrease in temperature |
| D. | None of the above |
| Answer» B. Increases with the increase in temperature | |
| 24. |
Pick up the correct statement from the following: |
| A. | In soils, the flow index indicates variation in shear strength with water content |
| B. | Liquid limit minus plastic limit, is known as plasticity index of the soil |
| C. | Plastic limit minus shrinkage limit, is known as shrinkage index of the soil |
| D. | All the above |
| Answer» D. All the above | |
| 25. |
The triaxial apparatus is usually used for |
| A. | Unconsolidated-undrained test |
| B. | Consolidated-undrained test |
| C. | Drained test |
| D. | All the above tests |
| Answer» D. All the above tests | |
| 26. |
Which one of the following clays behaves like a dense sand? |
| A. | Over-consolidated clay with a high over-consolidation ratio |
| B. | Over-consolidated clay with a low over-consolidation ratio |
| C. | Normally consolidated clay |
| D. | Under-consolidated clay |
| Answer» A. Over-consolidated clay with a high over-consolidation ratio | |
| 27. |
During seepage through a soil, direction of seepage is always |
| A. | Parallel to equipotential lines |
| B. | Perpendicular to stream lines |
| C. | Perpendicular to equipotential lines |
| D. | None of these |
| Answer» C. Perpendicular to equipotential lines | |
| 28. |
The seepage force in a soil, is |
| A. | Perpendicular to the equipotential lines |
| B. | Proportional to the exit gradient |
| C. | Proportional to the head loss |
| D. | All the above |
| Answer» D. All the above | |
| 29. |
Pick up the correct statement from the following: |
| A. | Coefficient of compressibility is the decrease in void ratio per unit increase of pressure |
| B. | The percent settlement at any time is called degree of consolidation |
| C. | Time factor is a dimensionless quantity |
| D. | All the above |
| Answer» D. All the above | |
| 30. |
Direct measurement of permeability of the specimen at any stage of loading can be made |
| A. | Only in fixed ring type consolidometer |
| B. | Only in floating ring type consolidometer |
| C. | Both (A) and (B) |
| D. | None of the above |
| Answer» A. Only in fixed ring type consolidometer | |
| 31. |
The property of a soil which allows it to be deformed rapidly without rupture, elastic rebound and also a volume change, is known |
| A. | Porosity |
| B. | Plasticity |
| C. | Permeability |
| D. | Ductility |
| Answer» B. Plasticity | |
| 32. |
Failure of the stability of slopes, generally occurs along |
| A. | Slip plane |
| B. | A horizontal surface |
| C. | A curved surface |
| D. | All the surfaces |
| Answer» C. A curved surface | |
| 33. |
The shearing force acting along the slice of a curved surface of slippage, causes the soil to slide |
| A. | Down at the centre |
| B. | Down at the toe |
| C. | Upward at the centre |
| D. | None of these |
| Answer» A. Down at the centre | |
| 34. |
With the increase in the amount of compaction energy |
| A. | Optimum water content increases but maximum dry density decreases |
| B. | Optimum water content decreases but maximum dry density increases |
| C. | Both optimum water content and maximum dry density increase |
| D. | Both optimum water content and maximum dry density decrease |
| Answer» B. Optimum water content decreases but maximum dry density increases | |
| 35. |
Soils containing organic matters |
| A. | Are of spongy nature |
| B. | Swell with decrease of moisture |
| C. | Shrink with increase of moisture content |
| D. | None of these |
| Answer» A. Are of spongy nature | |
| 36. |
Buoyant unit weight equals the saturated density |
| A. | Multiplied by unit weight of water |
| B. | Divided by unit weight of water |
| C. | Plus unit weight of water |
| D. | Minus unit weight of water |
| Answer» D. Minus unit weight of water | |
| 37. |
The change of moisture content of soils, changes the |
| A. | Value of the angle of repose |
| B. | Amount of compaction required |
| C. | Cohesive strength of soil |
| D. | All the above |
| Answer» D. All the above | |
| 38. |
Skempton's pore pressure coefficient B for saturated soil is |
| A. | 1 |
| B. | Zero |
| C. | Between 0 and 1 |
| D. | Greater than 1 |
| Answer» A. 1 | |
| 39. |
The density of soil can be increased |
| A. | By reducing the space occupied by air |
| B. | By elastic compression of soil grains |
| C. | By expelling water from pores |
| D. | All the above |
| Answer» D. All the above | |
| 40. |
Pick up the correct statement from the following: |
| A. | Kaolinite is most stable clay |
| B. | Kaolinite shows a very little sign of swelling on wetting |
| C. | Kaolinite is also called China clay |
| D. | All the above |
| Answer» D. All the above | |
| 41. |
Pick up the correct definition from the following: |
| A. | The lateral pressure exerted by the soil when the retaining wall moves away from the back fill, is generally known as active earth pressure of the soil |
| B. | The lateral pressure exerted by the soil when the retaining wail moves towards the soil, is generally known as 'Passive earth pressure of the soil |
| C. | The lateral pressure exerted by the soil when the retaining wall has no movement relative to the back fill, is known as 'earth pressure at rest of the soil |
| D. | All the above |
| Answer» D. All the above | |
| 42. |
Shear strength of a soil is a unique function of |
| A. | Effective stress only |
| B. | Total stress only |
| C. | Both effective stress and total stress |
| D. | None of the above |
| Answer» A. Effective stress only | |
| 43. |
260 g of wet soil was taken in a pycnometer jar of weight 400 g in order to find the moisture content in the soil, with specific gravity of soil particles 2.75. The weight of soil and remaining water filled in pycnometer without air bubbles was 1415 g and the weight of pycnometer filled with water alone was 1275 g. The moisture content in the soil is |
| A. | 24.2 % |
| B. | 18.2 % |
| C. | 53.8 % |
| D. | None of these |
| Answer» B. 18.2 % | |
| 44. |
The angle that Coulomb's failure envelope makes with the horizontal is called |
| A. | Cohesion |
| B. | Angle of internal friction |
| C. | Angle of repose |
| D. | None of the above |
| Answer» A. Cohesion | |
| 45. |
A flow net may be utilised for the determination of |
| A. | Exit gradient |
| B. | Seepage |
| C. | Hydrostatic pressure |
| D. | All the above |
| Answer» D. All the above | |
| 46. |
The compression index of a soil |
| A. | Decreases with an increase in the liquid limit |
| B. | Increases with an increase in the liquid limit |
| C. | Decreases with an increase in the plastic limit |
| D. | Is not related with plastic limit |
| Answer» B. Increases with an increase in the liquid limit | |
| 47. |
If the coefficient of the active pressure Ka is 1/3, the coefficient of passive pressure Kp, is |
| A. | 1/3 |
| B. | 2/3 |
| C. | 1 |
| D. | 3 |
| Answer» D. 3 | |
| 48. |
Sensitivity of a soil can be defined as |
| A. | Percentage of volume change of soil under saturated condition |
| B. | Ratio of compressive strength of unconfined undisturbed soil to that of soil in a remoulded state |
| C. | Ratio of volume of voids to volume of solids |
| D. | None of the above |
| Answer» B. Ratio of compressive strength of unconfined undisturbed soil to that of soil in a remoulded state | |
| 49. |
The intensity of active earth pressure at a depth of 10 metres in dry cohesionless sand with an angle of internal friction of 30° and with a weight of 1.8 t/m3, is |
| A. | 4 t/m2 |
| B. | 5 t/m2 |
| C. | 6 t/m2 |
| D. | 7 t/m2 |
| Answer» C. 6 t/m2 | |
| 50. |
The soil moisture driven off by heat, is called |
| A. | Free water |
| B. | Hydroscopic water |
| C. | Gravity water |
| D. | None of these |
| Answer» B. Hydroscopic water | |
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