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 relation between dry density (ρd), bulk density (ρ), and water content (w) is

a) ρ = ρd / (1 + w)

b) ρd = ρ / (1 + w)

c) w = ρ / (1 + ρd)

d) w = ρd / (1 + ρ)

2 / 30

2. Raft foundation is a type of:

a) Deep foundation

b) Shallow foundation

c) Foundation under water

d) None of the above

3 / 30

3. The critical height in the stability of the soil is the:

a) Maximum height at which the stability of the slope is possible

b) Minimum height at which the stability of the slope is possible

c) Maximum vertical height of the soil in an open excavation

d) None of the above

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4. Angle of internal friction of silty sand

a) 5-20°

b) 24-30°

c) 27-33°

d) 30-35°

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5. If the volume of voids is equal to the volume of solids in a soil, then the values of porosity and voids ratio respectively are

a) 1.0 and 0

b) 0 and 1

c) 0.5 and 1

d) 1 and 0.5

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6. The ratio of weight of water to the weight of solids in a given mass of soil is known as

a) Void ratio

b) Porosity

c) Specific gravity

d) Water content

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7. 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

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8. The change of moisture content of soils changes

a) Angle of repose

b) Cohesive strength

c) Amount of compaction required

d) Any of the above

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9. The ratio of plasticity index to flow index is called

a) Activity ratio

b) Liquidity index

c) Toughness index

d) Shrinkage index

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10. Soil transported by water and deposited at the bottom of the lake is known as

a) Alluvial soil

b) Lacustrine soil

c) Loess

d) Dune sand

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11. 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

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12. A foundation may be classified as spread foundation if:

a) Depth to width ratio is more than 2

b) Depth to width ratio is less than 2

c) Length to width ratio is more than 2

d) Length to width ratio is between 1 and 2

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

a) Air

b) Water

c) Soil

d) None of the above

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14. The slope of the flow curve obtained in the liquid limit test is called

a) Liquidity index

b) Plasticity index

c) Toughness index

d) Flow index

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15. 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

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16. 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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17. 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

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18. A clay deposit subjected to pressure in the past which is more than the present overburden pressure is known as

a) Normally consolidated soil

b) Overconsolidated soil

c) Underconsolidated soil

d) None of the above.

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19. Soil having more cohesion than sand

a) Silt

b) Gravel

c) Clay

d) None of the above

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20. The specific gravity of sandy soils/gravel is

a) <1.5

b) <2.0

c) >2.0

d) >2.5

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21. Piping in soils is due to

a) Low exit gradient

b) Erosion of subsoil by high velocity of seepage flow

c) Leakage of water through pipes laid in dams

d) Passage of water through well-connected pores in soil.

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22. 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

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

a) 1

b) 10

c) 5

24 / 30

24. The law which states that the velocity of flow through a porous medium is directly proportional to the hydraulic gradient is

a) Newton's law

b) Stokes's law

c) Darcy's law

d) Reynolds's law

25 / 30

25. In an earthen dam, the phreatic line is

a) Straight line

b) Circular line

c) Parabolic

d) Zigzag

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26. Which of the following is responsible for the shear resistance in soils?

a) Intergranular friction

b) Cohesion and adhesion between the soil particles

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

d) None of the above

27 / 30

27. *Coefficient of earth pressure at rest is:

a) Less than active earth pressure but greater than passive earth pressure

b) Greater than active earth pressure but lesser than passive earth pressure

c) Greater than both active and passive earth pressure

d) Lesser than both active and passive earth pressure

28 / 30

28. Distribution of earth pressure with depth is:

a) Parabolic

b) Hydrostatic

c) Non-linear but increasing

d) Volume controlled

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29. 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

30 / 30

30. 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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Soil Mechanics Online Test – Paper 2

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