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. 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

2 / 30

2. 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

3 / 30

3. 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

4 / 30

4. 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

5 / 30

5. The value of net allowable bearing pressure is:

a) Net safe bearing capacity

b) Net safe settlement pressure

c) Minimum of net safe bearing capacity and net safe settlement pressure

d) Gross safe bearing capacity

6 / 30

6. In hydrometer analysis, the principle used

a) Newton's law

b) Darcy's law

c) Stoke's law

d) Rehbann's law

7 / 30

7. Compaction is done to remove... from the soil.

a) Air

b) Water

c) Soil

d) None of the above

8 / 30

8. Angle of internal friction of silty sand

a) 5-20°

b) 24-30°

c) 27-33°

d) 30-35°

9 / 30

9. The degree of saturation in soils can be defined as the ratio of

a) Water by weight to the dry soil weight

b) Volume of water to the gross volume of soil

c) Volume of water to volume of voids in soil

d) Weight of the water to weight of the soil

10 / 30

10. 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

11 / 30

11. 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

12 / 30

12. Contribution due to skin friction is maximum in:

a) Sands

b) Soft clays

c) Piles resting on rock

d) None of the above

13 / 30

13. 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

14 / 30

14. The curve A, B, and C shown in fig below are respectively the stress-strain curves for stress of

a) Dense sand, clay, and loose sand

b) Dense sand, loose sand, and clay

c) Loose sand, dense sand, and clay

d) Clay, loose sand, and dense sand

15 / 30

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

a) Onion

b) Potato

c) Pumpkin

d) Turnip

16 / 30

16. If the resultant force at the bottom of the retaining wall lies outside the middle third, the failure will be due to:

a) Crushing

b) Sliding

c) Upthrust

d) Overturing

17 / 30

17. A soil sample has the following characteristics: S-50%, G-2.6, W-30%, find the void ratio, e

a) 1.56

b) 2.56

c) 0.56

d) 5.61

18 / 30

18. 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

19 / 30

19. A vertical wall is subjected to a liquid pressure on its one side, the total pressure on the wall acts at a distance of:

a) H/3

b) H/2

c) 2H/3

d) 3H/4

20 / 30

20. 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

21 / 30

21. The quantity of water seeping through a soil is

a) Proportional to the head of water downstream

b) Proportional to the head of water upstream

c) Proportional to the total head loss

d) None of the above

22 / 30

22. Units of the coefficient of permeability

a) cm/sec

b) sec/cm

c) cm/sec^2

d) sec^2/cm

23 / 30

23. Cohesion is defined as:

a) Attraction of molecules of the same material

b) Attraction of molecules of different materials

c) Both of the above

d) None of the above

24 / 30

24. In the case of a backfill with a sloping surface, the total active pressure on the wall of height H acts at:

a) H/3 above the base parallel to the base

b) H/3 above the base parallel to the sloping surface

c) H/2 above the base parallel to the base

d) H/2 above the base parallel to the sloping surface

25 / 30

25. The force exerted by flowing water on the sediment particles to cause their motion is called:

a) Eddy force

b) Buoyant force

c) Tractive force

d) Kinematic force

26 / 30

26. Cohesive soils are generally/normally

a) Plastic and also compressible

b) Elastic and also compressible

c) Plastic but incompressible

d) None of the above

27 / 30

27. Three-phase system is concerned with

a) Partially saturated soil

b) Saturated soil

c) Dry soil

d) All of the above

28 / 30

28. 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

29 / 30

29. Distribution of earth pressure with depth is:

a) Parabolic

b) Hydrostatic

c) Non-linear but increasing

d) Volume controlled

30 / 30

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

a) Zero

b) 30°

c) 45°

d) 15°

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Soil Mechanics Online Test – Paper 2

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