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. Cohesive soils are:

a) Good for embankment as they have high shear strength

b) Poor for backfills because of large lateral pressure

c) Good for backfills because of poor shear strength

d) Low lateral pressure

2 / 30

2. 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

3 / 30

3. The minimum number of piles needed to support a column is:

a) 1

b) 2

c) 3

d) 4

4 / 30

4. 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

5 / 30

5. 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

6 / 30

6. A pycnometer is used to determine

a) Specific gravity and dry density

b) Water content and void ratio

c) Water content and specific gravity

d) Dry density and void ratio

7 / 30

7. Pile foundations are enormously used in:

a) Bridge foundations

b) Machine foundations

c) Tall buildings

d) Towers

8 / 30

8. The bearing capacity of a soil depends upon:

a) Size of the particles

b) Shape of the particles

c) Cohesive properties of particles

d) All of the above

9 / 30

9. The density of soil can be increased by

a) By reducing the air voids

b) By elastic compression of soil grains

c) By expelling water from soil pores

d) All of the above

10 / 30

10. 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

11 / 30

11. The active earth pressure of a soil can be defined as lateral pressure exerted by the soil when

a) The retaining wall tends to move away from the backfill

b) The wall moves into the soil

c) The wall moves relative to the backfill

d) Any of the above

12 / 30

12. Three-phase system is concerned with

a) Partially saturated soil

b) Saturated soil

c) Dry soil

d) All of the above

13 / 30

13. A foundation may be classified as continuous foundation if:

a) Depth to width ratio is more than 2

b) Length to width ratio is more than 2

c) Depth to width ratio is equal to 2

d) Length to width ratio is less than 2

14 / 30

14. 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

15 / 30

15. Negative skin friction:

a) Increases the load-carrying capacity of the pile

b) Decreases the load-carrying capacity of the pile

c) Neither increases nor decreases the load-carrying capacity of the pile

d) All of the above

16 / 30

16. The minimum depth of the building foundation in:

a) Sandy soil is 80 cm to 100 cm

b) Clay soils is 90 cm to 160 cm

c) Rocky soils is 5 cm to 50 cm

d) All of the above

17 / 30

17. 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

18 / 30

18. Which is the correct definition of soil in the geotechnical engineer's point of view?

a) Soil is the top surface of the earth where plants can grow.

b) Soil is the unconsolidated material consisting of particles produced by the disintegration of rock, which may or may not contain organic matter.

c) Soil is the relatively thin surface zone that can contain moisture.

d) None of the above.

19 / 30

19. The ratio of volume of air voids to the total volume of the given soil mass is known as

a) Air content

b) Percentage of air voids

c) Percentage voids

d) Degree of saturation

20 / 30

20. 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

21 / 30

21. 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

22 / 30

22. The u/s face of an earthen dam is

a) An equipotential line

b) A phreatic line

c) A flow line

d) None of the above

23 / 30

23. Cohesive soils are generally/normally

a) Plastic and also compressible

b) Elastic and also compressible

c) Plastic but incompressible

d) None of the above

24 / 30

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

a) Perpendicularity

b) Parallel

c) Softly

d) With a bang

25 / 30

25. Permeability of soil varies,

a) Inversely as the square of grain size

b) Inversely as the grain size

c) Directly as of grain size

d) Square of grain size

26 / 30

26. 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

27 / 30

27. 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

28 / 30

28. The coefficient of earth pressure for loose sand having an angle of internal friction of 30° is:

a) 0.5

b) 1/3

c) 3

d) 1

29 / 30

29. Bearing capacity of soil primarily depends upon:

a) Air void

b) Water content

c) Chemical

d) Rate of loading

30 / 30

30. Total lateral earth pressure is proportional to

a) Depth of the soil

b) Square of the depth of the soil

c) Angle of internal friction of the soil

d) None of the above

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Soil Mechanics Online Test – Paper 2

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