Soil Mechanics Online Test - Paper 2

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Vikash chaudhary

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Total Questions: 30
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1 / 30

1. In the case of retaining walls, surcharge is:

a) Excess moisture in wall

b) Extra load on the wall

c) Additional load carrying capacity of wall

d) Extra load on the horizontal backfill

2 / 30

2. 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

3 / 30

3. Well foundation in sandy soils derive their bearing capacity from:

a) Skin friction

b) Point bearing

c) Uplift

d) Skin friction & point bearing

4 / 30

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 / 30

5. The reduction factor to the bearing capacity of soil due to the water table at a depth equal to half of the width of the footing below the footing is:

a) 0.25

b) 0.50

c) 0.75

d) 1.00

6 / 30

6. Contribution due to skin friction is maximum in:

a) Sands

b) Soft clays

c) Piles resting on rock

d) None of the above

7 / 30

7. Square root of times fitting method is used for calculating

a) Compression index

b) Coefficient of consolidation

c) Coefficient of compressibility

d) Coefficient of volume compressibility

8 / 30

8. Quick sand is a

a) Type of sand

b) Condition in which a cohesionless soil loses its strength because of upward flow of water

c) Moist sand containing small particles

d) Condition which occurs in coarse sand

9 / 30

9. A fully saturated soil is called

a) One phase system

b) Two phase system with soil and air

c) Two phase system with soil and water

d) Three phase system

10 / 30

10. The total stress in a soil is

a) Force per neutral area

b) Force per unit effective area

c) Stress taken by the particles of the soil

d) Stress taken by pure water

11 / 30

11. As moisture content of soil increases, cohesion of soil

a) Increases

b) Decreases

c) Constant

d) All of the above

12 / 30

12. Earth pressure at rest can be defined as lateral pressure exerted by the soil when the retaining wall tends to

a) Move away from the backfill

b) No movement relative to the backfill

c) Move into the soil

d) All of the above

13 / 30

13. A foundation may be classified as shallow if:

a) Depth is less than 6 m

b) Depth is less than its width

c) Depth is less than 1 m

d) None of the above

14 / 30

14. 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

15 / 30

15. Berms are used to:

a) Increase the weight of the dam

b) Reduce seepage losses

c) Increase shear strength

d) Increase factor of safety

16 / 30

16. The failure plane

a) Carries maximum shear stress

b) Does not carry maximum shear stress

c) Carries minimum shear stress

d) None of the above

17 / 30

17. Shearing strength of cohesionless soil depends upon

a) Dry density

b) Void ratio

c) Loading rate

d) Normal stress

18 / 30

18. The seepage force is proportional to

a) Exit gradient

b) Head of water at upstream

c) Head of water at downstream

d) None of the above

19 / 30

19. Talus' is the soil transported by

a) Wind

b) Water

c) Glacier

d) Gravitational force

20 / 30

20. An agent responsible for the transportation of soil is

a) Wind

b) Water

c) Gravity

d) All of the above

21 / 30

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 / 30

22. 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

23 / 30

23. The percentage of the porosity of loose sand is in the range of

a) 5 to 15%

b) 15 to 30%

c) 30 to 40%

d) 40 to 50%

24 / 30

24. Moisture content for the optimum moisture content of silt is

a) 5%

b) 10%

c) 15%

d) 20%

25 / 30

25. The bearing capacity of soil depends on:

a) Grain size of the soil

b) Load intensity

c) On the load

d) Rate of loading

26 / 30

26. Chemical weathering occurs because of

a) Oxidation

b) Carbonation

c) Hydration

d) All of the above

27 / 30

27. 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

28 / 30

28. A decrease in water content results in a reduction of the volume of a soil in

a) Liquid state

b) Plastic state

c) Semi-liquid state

d) All of the above

29 / 30

29. The rise of the water table below the foundation influences the bearing capacity of soil mainly by reducing:

a) Effective angle of shearing resistance

b) Cohesion and effective unit weight of soil

c) Effective unit weight of soil and effective angle of shearing resistance

d) Cohesion and effective angle of shearing resistance

30 / 30

30. The difference between the undisturbed shear strength and remoulded shear strength is known as

a) Thixotropy

b) Dilatancy

c) Remoulding less

d) Degree of sensitivity

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Soil Mechanics Online Test – Paper 2

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