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 bearing capacity of a weak soil may be improved by:

a) Increasing the depth of the foundation

b) Compacting the soil by ramming

c) Removing the poor soil and filling the gap with sand, gravel, etc.

d) All of the above

2 / 30

2. 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

3 / 30

3. 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

4 / 30

4. On wetting, cohesive soils

a) Lose permeability

b) Gain shear strength

c) Lose elasticity

d) Decrease their shear strength

5 / 30

5. Flow net can be used for the determination of

a) Seepage flow rate

b) Hydrostatic pressure

c) Seepage pressure

d) All of the above

6 / 30

6. 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

7 / 30

7. Which of the following soils has the largest permeability?

a) Sand

b) Gravel

c) Silt

d) Clay

8 / 30

8. Bearing capacity of soil primarily depends upon:

a) Air void

b) Water content

c) Chemical

d) Rate of loading

9 / 30

9. The dry density of soil can be defined as

a) Weight of solids to the total volume of the soil

b) Weight of the soil to the volume of the soil

c) Unit weight of the soil to the unit weight of water

d) None of the above

10 / 30

10. 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

11 / 30

11. Distribution of earth pressure with depth is:

a) Parabolic

b) Hydrostatic

c) Non-linear but increasing

d) Volume controlled

12 / 30

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

a) Steep slopes

b) Gentle slopes

c) All inclinations

d) Very steep slopes

13 / 30

13. The critical exit gradient of the seepage of water in a soil is

a) (1-e) / (G-1)

b) (G+e) / (1+e)

c) (G-1)/(1+e)

d) None of the above

14 / 30

14. 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

15 / 30

15. Negative skin friction affects the load carrying capacity of the pile by:

a) Increases

b) Decreases

c) Constant

d) None of the above

16 / 30

16. The length/diameter ratio of cylindrical specimens used in a triaxial test is generally

a) 1

b) 1.5

c) 2

d) 2.5

17 / 30

17. As sheet pile walls are embedded in soil, for the design of:

a) Active earth pressure only

b) Earth pressure at rest only

c) Passive earth pressure only

d) Active and passive earth pressure both considered

18 / 30

18. * A 'shear stress' is a stress which is applied.......to a face of material.

a) Perpendicularity

b) Parallel

c) Softly

d) With a bang

19 / 30

19. A clay deposit that is not 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

20 / 30

20. If s is the focal length of Kozeny's parabola and k is the coefficient of permeability, the seepage flow rate per unit length of the dam is given as

a) q = k.s

b) q = s/k

c) q = k√v

d) q = k/s

21 / 30

21. In an undrained plastic clay, the shear strength is due to

a) Internal friction

b) Cohesion

c) Inter-granular friction

d) None of the above

22 / 30

22. Stability of slopes can be increased by:

a) Adopting gentle slopes

b) Adopting great heights

c) Storing water on one side

d) Constructing on clay deposits

23 / 30

23. 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

24 / 30

24. The shape & structure of an isobar is like a/an

a) Onion

b) Potato

c) Pumpkin

d) Turnip

25 / 30

25. In a sand stratum of 1.5m thickness, specific gravity 2.67, and voids ratio 0.67, the head required for the quick condition is equal to

a) 2.5m

b) 2.0m

c) 1.5m

d) 3.0m

26 / 30

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

a) Skin friction

b) Point bearing

c) Uplift

d) Skin friction & point bearing

27 / 30

27. The top flow line in the case of seepage flow through an earthen dam has the shape of

a) Parabola

b) Ellipse

c) Hyperbola

d) None of the above

28 / 30

28. 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

29 / 30

29. 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

30 / 30

30. The angle between the horizontal and the slope of a heap produced by pouring clean dry sand from a small height is known as:

a) the angle of equilibrium

b) the angle of bulk

c) the angle of rest

d) the angle of repose

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Soil Mechanics Online Test – Paper 2

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