Soil Mechanics Online Test - Paper 3

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Vikash chaudhary

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Total Questions: 50
Time Allotted: 50 minutes
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1 / 50

1. Toe failure is most likely in the case of:

a) Steep slopes

b) Gentle slopes

c) All inclinations

d) Very steep slopes

2 / 50

2. Hygroscopic water can be removed by

a) Gravity flow

b) Free flow

c) Heating

d) All of the above

3 / 50

3. Moisture content of saturated soil equals:

a) 0%

b) 100%

c) 50%

d) 90%

4 / 50

4. The vane shear test is used for the in-situ determination of the undrained strength of the intact fully saturated

a) Sands

b) Clays/cohesive soils

c) Gravels

d) Highly organic soils

5 / 50

5. A grillage foundation is used under:

a) Heavy load-bearing wall

b) Set of columns

c) Combined footing

d) Heavy loaded situations

6 / 50

6. Which of the following statements is true?

a) In a dry soil, all the voids are filled with air.

b) In a saturated soil, all the voids are filled with water.

c) In a partly saturated soil, the voids are occupied by both air and water.

d) All of the above

7 / 50

7. Absorbed water in soil is

a) Same as free water

b) The water chemically combined in the crystal structure of the soil material

c) Having free movement through the soil by gravity

d) Water absorbed from the atmosphere by forces of attraction

8 / 50

8. Bleeder wells are required to

a) Increase discharge from the main well

b) Store drainage water

c) Collect seepage water in dams

d) Relieve pressure in impervious layers

9 / 50

9. The types of soil, which contain particles of almost the same size

a) Uniform soil

b) Uniformly graded soil

c) Skip-graded soil

d) Gap-graded soil

10 / 50

10. * For a properly designed footing, the bearing stress must be less than the bearing capacity, which is the bearing stress that causes a ......... failure within the foundation soil.

a) Tensile

b) Expected

c) Unexpected

d) Shear

11 / 50

11. The behavior of silt is normally governed by

a) Mass energy

b) Surface energy

c) Mass energy and surface energy

d) None of the above

12 / 50

12. Cement stabilizer is suitable for

a) RCC

b) Masonry

c) Soil stabilization

d) All of the above

13 / 50

13. Compression of soils occurs rapidly if voids are occupied by

a) Air

b) Water

c) Partly air and partly water

d) None of the above

14 / 50

14. The quantity of water seeping through a soil is

a) Proportional to the head of water downstream

b) Proportional to the head of water upstream

c) Proportional to the total head loss

d) None of the above

15 / 50

15. In cohesive soils, the depth of the vertical cut up to which no lateral support is required is given by:

a) 2c/γ

b) 4c/γ

c) 2γ/c

d) 4γ/c

16 / 50

16. Angle of Internal friction is minimum for

a) angular grained loose soil

b) angular grained dense soil

c) round drained loose soil

d) clay

17 / 50

17. Cohesion is defined as:

a) Attraction of molecules of the same material

b) Attraction of molecules of different materials

c) Both of the above

d) None of the above

18 / 50

18. Which method is quickest to find the water content of soils?

a) Oven dry method

b) Alcohol method

c) Calcium carbide method

d) Sand bath method

19 / 50

19. The ratio of plasticity index to clay fraction is known as

a) Activity ratio or number

b) Flow index

c) Liquidity index

d) Toughness index

20 / 50

20. Terzaghi's theory of one-dimensional consolidation assumes:

a) Soil is homogeneous and fully saturated

b) Water and soil particles are incompressible

c) Deformation of the soil is entirely due to a change in volume

d) All of the above

21 / 50

21. The minimum net pressure intensity causing shear failure of the soil is called:

a) Safe bearing capacity

b) Net ultimate bearing capacity

c) Net bearing capacity

d) Ultimate bearing capacity

22 / 50

22. The rate of consolidation

a) Increases with a decrease in temperature

b) Increases with an increase in temperature

c) Independent of temperature

d) None of the above

23 / 50

23. Which is the correct definition of soil in the geotechnical engineer's point of view?

a) Soil is the top surface of the earth where plants can grow.

b) Soil is the unconsolidated material consisting of particles produced by the disintegration of rock, which may or may not contain organic matter.

c) Soil is the relatively thin surface zone that can contain moisture.

d) None of the above.

24 / 50

24. The u/s face of an earthen dam is

a) An equipotential line

b) A phreatic line

c) A flow line

d) None of the above

25 / 50

25. The ratio of volume of voids to the total volume of the given soil mass is known as

a) Porosity

b) Void ratio

c) Specific gravity

d) Water content

26 / 50

26. Contribution due to skin friction is maximum in:

a) Sands

b) Soft clays

c) Piles resting on rock

d) None of the above

27 / 50

27. The maximum water content at which a reduction in water content does not cause a decrease in the volume of the soil mass is known as

a) Liquid limit

b) Plastic limit

c) Shrinkage limit

d) Ductile limit

28 / 50

28. The base width of the retaining wall is B. What is the maximum permissible eccentricity if the wall should not fail in tension?

a) B/3

b) 2B/3

c) B/6

d) B/2

29 / 50

29. In soil if the water content is equal to the liquid limit, its relative consistency is

a) 1

b) 10

c) 5

30 / 50

30. A vertical wall is subjected to a liquid pressure on its one side, the total pressure on the wall acts at a distance of:

a) H/3

b) H/2

c) 2H/3

d) 3H/4

31 / 50

31. The bearing capacity of soil depends on:

a) Grain size of the soil

b) Load intensity

c) On the load

d) Rate of loading

32 / 50

32. Soil which contains particles of different sizes in good proportion is called

a) Uniform soil

b) Well-graded soil

c) Consistent soil

d) None of the above

33 / 50

33. The active earth pressure of a soil can be defined as lateral pressure exerted by the soil when

a) The retaining wall tends to move away from the backfill

b) The wall moves into the soil

c) The wall moves relative to the backfill

d) Any of the above

34 / 50

34. Physical weathering occurs due to

a) Temperature changes

b) Wedging action of ice

c) Spreading of roots of plants

d) All of the above

35 / 50

35. A foundation may be classified as spread foundation if:

a) Depth to width ratio is more than 2

b) Depth to width ratio is less than 2

c) Length to width ratio is more than 2

d) Length to width ratio is between 1 and 2

36 / 50

36. The types of compaction suitable in a congested area for cohesive as well as cohesionless soil are

a) Roller

b) Rammer

c) Vibrator

d) Vibrofloatation

37 / 50

37. The process of compaction may involve

a) Rolling

b) Tamping

c) Vibration

d) Any of the above

38 / 50

38. The angle of internal friction for cohesive soils is equal to:

a) Zero

b) 30°

c) 45°

d) 15°

39 / 50

39. The coefficient of earth pressure for loose sand having an angle of internal friction of 30° is:

a) 0.5

b) 1/3

c) 3

d) 1

40 / 50

40. The seepage force is proportional to

a) Head loss

b) Flow net

c) Head at upstream

d) Equipotential gradient

41 / 50

41. Bearing capacity of soil is determined by:

a) Plate load test

b) Standard cone test

c) Both (a) and (b) of above

d) None of the above

42 / 50

42. Three-phase system is concerned with

a) Partially saturated soil

b) Saturated soil

c) Dry soil

d) All of the above

43 / 50

43. The shear strength of a soil is proportional

a) Directly to the angle of internal friction

b) Directly to the tangent of the angle of internal friction

c) Inversely to the angle of internal friction

d) None of the above

44 / 50

44. In Rankine's earth pressure theory, the following assumption is made:

a) Wall face is rough and vertical

b) Backfill is cohesive soil

c) Wall face is smooth and vertical

d) Elastic equilibrium is satisfied

45 / 50

45. The ultimate B.C. of a soil can be defined as:

a) Ultimate load on the bearing area

b) Safe load on the bearing area

c) Load at which the soil fails

d) Load beyond which the soil should not be loaded

46 / 50

46. If you are asked to classify soils into 3 categories, which of the following categorizations would you prefer?

a) Clayey, Silty, and Sandy

b) Clayey, Sandy, and Granular

c) Clayey, Silty, and Loamy

d) Coarse-grained, fine-grained, and highly organic

47 / 50

47. Cohesionless soils are formed due to

a) Oxidation of rocks

b) Leaching action of water on rocks

c) Blowing of hot and cold wind

d) Physical disintegration of rock

48 / 50

48. If the coefficient of permeability of a soil is 0.08 cm/sec, that soil will be

a) Clay

b) Silt

c) Sand

d) Gravel

49 / 50

49. Which of the following soils will have the least value of the safe load?

a) Sandstone

b) Limestone

c) Moorum

d) Soft chalk

50 / 50

50. Negative skin friction is to be considered when:

a) Fill settles relative to the pile

b) Pile settles relative to the fill

c) Fill and pile settle together

d) Water table rises

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