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. The assumption of Rankine's theory of earth pressure is:

a) The soil is semi-finite, homogeneous, dry, and cohesionless

b) Ground surface is a plane that may be inclined or horizontal

c) The back of the wall is vertical and smooth

d) All of the above

2 / 50

2. 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

3 / 50

3. The soil transported by wind and deposited is called:

a) Aeolian soil

b) Marine soil

c) Alluvial soil

d) Lacustrine soil

4 / 50

4. The relation between dry density (yd), bulk density (y), and water content (w) is

a) y = yd / (1 + w)

b) yd = y / (1 + w)

c) w = y / (1 + yd)

d) w = y / (1 - yd)

5 / 50

5. 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

6 / 50

6. 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

7 / 50

7. Passive earth pressure is defined as

a) Retaining wall tends to move away from the backfill

b) Retaining wall tends to move towards the backfill

c) Retaining wall is in a stationary position

d) All of the above

8 / 50

8. Terzaghi's analysis assumes:

a) Soil is homogeneous and isotropic

b) Elastic zone has straight boundaries inclined at (Theta = theta) to the horizontal and plastic zones fully developed

c) Failure zones do not extend above the horizontal plane through the base of the footing

d) All of the above

9 / 50

9. Stability analysis shall be made considering:

a) Total stresses

b) Normal stresses

c) Effective stresses

d) Shear stresses

10 / 50

10. The specific gravity of sandy soils/gravel is

a) <1.5

b) <2.0

c) >2.0

d) >2.5

11 / 50

11. The soil sample contains a volume of void 0.2 and a volume of soil solid is 0.30 then find the void ratio & porosity of soil

a) 0.67, 0.40

b) 2, 0.67

c) 0.67, 0.80

d) 0.80, 0.67

12 / 50

12. Consolidation is a process involving

a) Sudden compression of soil

b) Tilting and failure of the structure

c) Abnormal sinking of foundation

d) Gradual expulsion of pore water

13 / 50

13. A soil that is fully consolidated under the existing overburden pressure is known as

a) Normally consolidated soil

b) Overconsolidated soil

c) Underconsolidated soil

d) None of the above

14 / 50

14. If the water content of a fully saturated soil mass is 100%, then the voids will be

a) Less than the specific gravity of soil

b) Equal to the specific gravity of soil

c) Greater than the specific gravity of soil

d) Independent of the specific gravity of soil

15 / 50

15. Electrical analogy method is used to

a) Find electrical conductivity of soil

b) Draw flow net

c) Find the depth to the water table

d) Find the water content in a soil

16 / 50

16. Sheet piles are held in position by:

a) Self-weight of the sheet pile

b) Tie rods which are anchored

c) Embedding the bottom of the sheet pile

d) Adjusting water level on one side

17 / 50

17. The strength of a soil is generally identified by

a) Direct tensile stress

b) Net stress

c) Ultimate shear stress

d) Direct ultimate compressive stress

18 / 50

18. The most effective method for compacting sand is by using

a) Pneumatic rollers

b) Sheep foot rollers

c) Steel tyred rollers

d) Vibration

19 / 50

19. A foundation may be classified as deep 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

20 / 50

20. If the sand in situ is in the densest state, then its relative density is

a) Equal to zero

b) Equal to one

c) Between 0 and 1

d) Greater than 1

21 / 50

21. If the volume of voids is equal to the volume of solids in a soil, then the values of porosity and voids ratio respectively are

a) 1.0 and 0

b) 0 and 1

c) 0.5 and 1

d) 1 and 0.5

22 / 50

22. Shearing strength of cohesionless soil depends upon

a) Dry density

b) Void ratio

c) Loading rate

d) Normal stress

23 / 50

23. Soil transported by water and deposited at the bottom of the lake is known as

a) Alluvial soil

b) Lacustrine soil

c) Loess

d) Dune sand

24 / 50

24. The minimum number of piles needed to support a wall is:

a) 1

b) 2

c) 3

d) 4

25 / 50

25. Sheet pile walls are used as:

a) Retaining walls for waterfront construction

b) Load-bearing pile foundations

c) Seepage preventing devices

d) Uplift preventing devices

26 / 50

26. The compression resulting from long-term static load and resulting expulsion of water is known as

a) Compaction

b) Inverse swelling

c) Consolidation

d) None of the above

27 / 50

27. Specific gravity of soil is

a) Same for clays and sands

b) Determined by hydrometer

c) Less than 2.0 for most soils

d) More than 2.5 for most soils

28 / 50

28. Base failure refers to a failure surface that:

a) Is above the toe of the slope

b) Includes the toe of the slope

c) Is below the toe of the slope

d) None of the above

29 / 50

29. Distribution of earth pressure with depth is:

a) Parabolic

b) Hydrostatic

c) Non-linear but increasing

d) Volume controlled

30 / 50

30. On wetting, cohesive soils

a) Lose permeability

b) Gain shear strength

c) Lose elasticity

d) Decrease their shear strength

31 / 50

31. *Earth pressure acting at a height of ..... in case of inclined surcharge is:

a) h/2 from the base of the wall

b) h/3 from the base of the wall

c) h/4 from the base of the wall

d) h/5 from the base of the wall

32 / 50

32. The shear strength of a soil

a) Is directly proportional to the depth of the soil

b) Is directly proportional to the angle of repose of the soil

c) Increases with normal stress

d) Decreases with an increase in the normal stress

33 / 50

33. The direction of seepage is

a) Parallel to equipotential line

b) Perpendicular to equipotential line

c) Parallel to flow line

d) None of the above

34 / 50

34. Total lateral earth pressure is proportional to

a) Depth of the soil

b) Square of the depth of the soil

c) Angle of internal friction of the soil

d) None of the above

35 / 50

35. In a flow net, which of the following statements is true?

a) Flow lines and equipotential lines intersect at oblique angles

b) Flow lines and equipotential lines intersect orthogonally

c) Flow rate through each flow channel is different

d) The head along each flow line is constant

36 / 50

36. The bottom plug in well foundation is used:

a) To seal off the water

b) For stable resting

c) To transfer load from the steining to the soil

d) Create a working place in the well

37 / 50

37. The relationship between void ratio (e) and porosity ratio (n) is

a) n = e / (1-n)

b) e = n / (1-n)

c) e = (1+n) / (1-e)

d) (1+e) / (1-e)

38 / 50

38. Angle of internal friction of silty sand

a) 5-20°

b) 24-30°

c) 27-33°

d) 30-35°

39 / 50

39. The change of moisture content of soils changes

a) Angle of repose

b) Cohesive strength

c) Amount of compaction required

d) Any of the above

40 / 50

40. The pressure-void ratio curve will be

a) Linear when plotted on ordinary paper

b) Linear when plotted on semi-log paper

c) Linear when plotted on log-log paper

d) None of the above

41 / 50

41. Cohesive soils are:

a) Good for embankment as they have high shear strength

b) Poor for backfills because of large lateral pressure

c) Good for backfills because of poor shear strength

d) Low lateral pressure

42 / 50

42. Plasticity needle/Proctor needle is used to determine

a) Plastic limit of the soil used in compaction

b) Penetration resistance to control field compaction

c) Penetration value of bitumen used in road construction

d) Swelling index of black cotton soil

43 / 50

43. The factor of safety of embankments shall be:

a) At least 1.0

b) At least 1.5

c) At least 2.0

d) At least 2.5

44 / 50

44. The principal stress is maximum on

a) Minor principal plane

b) Intermediate principal plane

c) Major principal plane

d) None of these

45 / 50

45. Cohesionless soil is

a) Sand

b) Silt

c) Clay

d) Clay and silt

46 / 50

46. The void ratio of soil is

a) The ratio of voids to solids in volume

b) The ratio of voids to gross volume

c) The ratio of solids to voids in volume

d) The ratio of solid volume to gross volume

47 / 50

47. 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

48 / 50

48. 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

49 / 50

49. Water content is defined as the ratio of

a) Weight of water to weight of solids

b) Weight of solids to weight of water

c) Total amount of water in soil

d) All of the above

50 / 50

50. Pile foundations are enormously used in:

a) Bridge foundations

b) Machine foundations

c) Tall buildings

d) Towers

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Soil Mechanics Online Test – Paper 3

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