Soil Mechanics Online Test - Paper 2

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Vikash chaudhary

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Total Questions: 30
Time Allotted: 30 minutes
Passing Score: 50%
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1 / 30

1. Wedge shape failure is assumed by:

a) Coulomb

b) Rankine

c) Poncelet

d) Terzaghi

2 / 30

2. 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

3 / 30

3. 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

4 / 30

4. 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

5 / 30

5. 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

6 / 30

6. The water content at which the soil changes from a liquid state to a plastic state is known as

a) Plastic limit

b) Liquid limit

c) Shrinkage limit

d) None of the above

7 / 30

7. Active earth pressure is

a) Always less than passive earth pressure

b) Always greater than passive earth pressure

c) Sometimes greater than passive earth pressure

d) Equal to passive earth pressure

8 / 30

8. 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

9 / 30

9. The degree of saturation, Sr, of soil in percentage has a value

a) Sr > 0

b) Sr ≤ 0

c) 0 < S < 100

d) 0 ≤ S ≤ 100

10 / 30

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

a) Sandstone

b) Limestone

c) Moorum

d) Soft chalk

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11. Void ratio, e, of a soil can

a) Never be greater than one

b) Be equal to zero

c) Be greater than zero

d) Be between 0 and 1

12 / 30

12. The maximum differential settlement in the case of a foundation on clayey soils is:

a) 10 mm

b) 20 mm

c) 30 mm

d) 40 mm

13 / 30

13. * 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

14 / 30

14. 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)

15 / 30

15. The phreatic line is

a) The u/s face of the earth dam

b) The d/s face of the earth dam

c) The top flow line

d) None of the above

16 / 30

16. The critical exit gradient of the seepage of water in soils

a) Increases with a decrease in the specific gravity

b) Increases with an increase in the specific gravity

c) Decreases with an increase in the liquid limit

d) None of the above

17 / 30

17. Shear strength of a soil is a unique function of

a) Effective stress only

b) Total stress only

c) Both total and effective stress

d) None of the above

18 / 30

18. Pick up the correct sequence of geological cycle for the formation of soil

a) Transportation - Upheaval - Deposition - Weathering

b) Transportation - Deposition - Weathering - Upheaval

c) Weathering - Upheaval - Deposition - Transportation

d) Weathering - Transportation - Deposition - Upheaval

19 / 30

19. 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

20 / 30

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

a) Zero

b) 30°

c) 45°

d) 15°

21 / 30

21. 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

22 / 30

22. 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

23 / 30

23. The angle between the directions of the failure and the major principal plane is equal to:

a) 90° + effective angle of shearing resistance

b) 90° + half of the angle of shearing resistance

c) 45° + half of the angle of shearing resistance

d) 45° - half of the angle of shearing resistance

24 / 30

24. The ratio of plasticity index to flow index is called

a) Activity ratio

b) Liquidity index

c) Toughness index

d) Shrinkage index

25 / 30

25. The saturated density of soil can be expressed as

a) Weight of soil in water to its volume

b) Weight of soil minus weight of equivalent water to volume of soil

c) Weight of soil less weight of water in voids to the volume of solids plus voids in the soil

d) Unit weight of saturated soil

26 / 30

26. The angle of repose of soil is defined as the angle that an inclined plane makes with the horizontal when a body placed on it just sliding is:

a) maximum

b) minimum

c) average

d) vertical

27 / 30

27. Soils are basically

a) Organic materials

b) Inorganic materials

c) Mineral materials

d) Organic and inorganic materials

28 / 30

28. 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

29 / 30

29. 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

30 / 30

30. Compared to dry backfill, submerged backfill will exert:

a) Same earth pressure

b) Less earth pressure

c) More earth pressure

d) Terzaghi

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Soil Mechanics Online Test – Paper 2

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