Soil Mechanics Online Test – Paper 2

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Vikash chaudhary

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Total Questions: 30
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1 / 30

1. 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.

2 / 30

2. 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

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3. Wedge shape failure is assumed by:

a) Coulomb

b) Rankine

c) Poncelet

d) Terzaghi

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4. The most effective method for compacting sand is by using

a) Pneumatic rollers

b) Sheep foot rollers

c) Steel tyred rollers

d) Vibration

5 / 30

5. 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

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6. The load-carrying capacity of the pile is............due to skin friction.

a) Increases

b) Decreases

c) Constant

d) None of the above

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7. Consolidation test of a soil sample is carried out to determine:

a) The void ratio in soil

b) The decrease in the total volume

c) The liquid limit of soil

d) The plastic limit of soil

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8. 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 that may be inclined or horizontal

c) The back of the wall is vertical and smooth

d) All of the above

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9. The void ratio of soil is

a) The ratio of voids to solids in volume

b) The ratio of voids to gross volume

c) The ratio of solids to voids in volume

d) The ratio of solid volume to gross volume

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10. Terzaghi's theory of one-dimensional consolidation assumes:

a) Soil is homogeneous and fully saturated

b) Water and soil particles are incompressible

c) Deformation of the soil is entirely due to a change in volume

d) All of the above

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11. 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

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12. 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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13. 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

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14. 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

15 / 30

15. In soil if the water content is equal to the liquid limit, its relative consistency is

a) 1

b) 10

c) 5

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16. Weathering of soils is caused by

a) Periodical temperature changes

b) Impact and splitting action of flowing water

c) Impact and splitting action of plants and animals

d) All of the above

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17. The shear strength of a soil is

a) Directly proportional to the cohesion of soil

b) Directly proportional to the angle of friction of the soil

c) Directly proportional to the normal stress

d) All of the above

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18. 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

19 / 30

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

a) Onion

b) Potato

c) Pumpkin

d) Turnip

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20. For a well-graded soil, the coefficient of curvature will be between:

a) 1 and 10

b) 2 and 8

c) 3 and 7

d) 1 and 3

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21. The ultimate bearing capacity of frictionless soils is:

a) 4.5c to 6c

b) 2c to 4c

c) 1c to 3c

d) 2c to 5c

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

a) Zero

b) 30°

c) 45°

d) 15°

23 / 30

23. 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

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24. 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

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25. Chemical weathering occurs because of

a) Oxidation

b) Carbonation

c) Hydration

d) All of the above

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26. 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

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27. The process of improving the engineering properties of the soil and thus making it more stable is known as

a) Compaction

b) Consolidation

c) Stabilization

d) None of the above

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28. 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

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29. The angle between the maximum shear stress plane and the horizontal plane is equal to

a) 15°

b) 30°

c) 45°

d) 50°

30 / 30

30. 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

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Soil Mechanics Online Test – Paper 2

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