Soil Mechanics Online Test – Paper 2

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Vikash chaudhary

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Total Questions: 30
Time Allotted: 30 minutes
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1 / 30

1. The assumption of Coulomb's theory is:

a) Backfill is dry, homogeneous, isotropic, and cohesionless

b) Rupture plane is linear and passes through the toe of the wall

c) Sliding wedge acts as a rigid body, and the value of earth pressure is obtained by considering the equilibrium of the wedge

d) All of the above

2 / 30

2. 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

3 / 30

3. Wedge shape failure is assumed by:

a) Coulomb

b) Rankine

c) Poncelet

d) Terzaghi

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4. The seepage force is proportional to

a) Head loss

b) Flow net

c) Head at upstream

d) Equipotential gradient

5 / 30

5. Mechanical stabilization is done by

a) Cement

b) Lime

c) Bitumen

d) Proper grading

6 / 30

6. The bearing capacity factors (N_c, N_q,) and (N_r) are functions of:

a) Cohesion only

b) Angle of internal friction

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

d) None of the above

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7. An agent responsible for the transportation of soil is

a) Wind

b) Water

c) Gravity

d) All of the above

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8. The maximum dry density occurs at a particular water content which is known as

a) Optimum moisture content

b) Maximum moisture content

c) Low moisture content

d) Water content

9 / 30

9. Pile foundations are normally used in:

a) Soft clayey soil

b) Loose sandy soil

c) Heavy loaded situations

d) When required bearing area is not available

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10. The angle of internal friction depends upon

a) Particle shape and roughness

b) Normal direct pressure

c) The amount of interlocking

d) All of the above

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11. The effective stress in a soil is equal to

a) Force per natural area

b) Force per unit effective area

c) Stress shared by the particles of the soil

d) Stress shared by the pore water

12 / 30

12. Combined footing is generally used when:

a) Number of columns are more than two and are spaced far apart

b) Number of columns are two and are spaced close to each other

c) Number of columns are two and are spaced far apart

d) None of the above

13 / 30

13. *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

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14. Flow lines and equipotential lines are

a) Parallel to each other

b) Perpendicular to each other

c) Not intersecting lines

d) Intersecting lines at 90°

15 / 30

15. 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

16 / 30

16. 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

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17. 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

18 / 30

18. The specific gravity of sandy soils/gravel is

a) <1.5

b) <2.0

c) >2.0

d) >2.5

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19. The factor of safety of slopes is defined as:

a) FS= Total stress / Effective stress

b) FS= Shear strength / Shear stress

c) FS= Overturning moment / Resisting moment

d) FS= Shear stress / Normal stress

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20. Saturated soil is concerned with

a) Two-phase system

b) Three-phase system

c) One-phase system

d) All of the above

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21. The shear strength of cohesive soil is equal to

a) C = q/2

b) C = 0.5 q tanΦ

c) C = q

d) C = q tan Φ

22 / 30

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

a) Increases

b) Decreases

c) Constant

d) All of the above

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

a) Steep slopes

b) Gentle slopes

c) All inclinations

d) Very steep slopes

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24. The reduction factor to the bearing capacity of soil due to the water table just below the footing is:

a) 0.25

b) 0.50

c) 0.75

d) 1.00

25 / 30

25. Overturning moment due to the pressure of the soil is 10 KN-m while the resisting moment is 5 KN-m. Find the factor of safety:

a) 2

b) 1

c) 0.5

d) None of the above

26 / 30

26. 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)

27 / 30

27. A foundation may be classified as a strip foundation if:

a) Length is very large

b) Length is very large compared with uniform width

c) Load is applied at long intervals

d) None of the above

28 / 30

28. Flow path/flow channel is

a) The space between two adjacent flow lines

b) Direction of flow

c) The space between two equipotential lines

d) None of the above

29 / 30

29. Number of blows required to penetrate the sampler & cone for a depth of ...&... is known as penetration number

a) 30cm & 20cm

b) 20cm & 30cm

c) 40cm & 50cm

d) 50cm & 40cm

30 / 30

30. 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 which may be inclined or horizontal

c) Back of the wall is vertical and smooth

d) All of the above

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Soil Mechanics Online Test – Paper 2

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