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 relationship between void ratio (e) and porosity ratio (n) is

a) n = e / (1-n)

b) e = n / (1-n)

c) e = (1+n) / (1-e)

d) (1+e) / (1-e)

2 / 30

2. 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

3 / 30

3. The quantity of seepage of water in the soil is

a) Proportional to the coefficient of permeability

b) Proportional to the head of the water at downstream

c) Inversely proportional to the coefficient of permeability

d) Inversely proportional to the head of the water at downstream

4 / 30

4. 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

5 / 30

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

a) Onion

b) Potato

c) Pumpkin

d) Turnip

6 / 30

6. Inorganic soils with low plasticity are denoted by

a) ML

b) CH

c) MH

d) SH

7 / 30

7. A soil that is 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

8 / 30

8. Westergaard's theory is more appropriate for

a) layered soils

b) homogeneous deposits

c) anisotropic soils

d) normally consolidated homogeneous soils

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9. The factor of safety of embankments shall be:

a) At least 1.0

b) At least 1.5

c) At least 2.0

d) At least 2.5

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10. 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

11 / 30

11. Flow path/flow channel is

a) The space between two adjacent flow lines

b) Direction of flow

c) The space between two equipotential lines

d) None of the above

12 / 30

12. In Rankine's earth pressure theory, the following assumption is made:

a) Wall face is rough and vertical

b) Backfill is cohesive soil

c) Wall face is smooth and vertical

d) Elastic equilibrium is satisfied

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13. The property of the soil which allows water to flow through the soil is known as

a) Capillary

b) Permeability

c) Fluidity

d) Viscosity

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14. A plane inclined at an angle to the horizontal at which the soil is expected to stay in the absence of any lateral support is known as:

a) Natural slope line

b) The stable line

c) Repose line

d) All of the above

15 / 30

15. The critical exit gradient of the seepage of water in soils is

a) Directly proportional to the void ratio

b) Increases with a decrease in void ratio

c) Increases with a decrease in specific gravity

d) Inversely proportional to the specific gravity

16 / 30

16. 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

17 / 30

17. Bearing capacity of soil is determined by:

a) Plate load test

b) Standard cone test

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

d) None of the above

18 / 30

18. Terzaghi's analysis assumes:

a) Soil is homogeneous and isotropic

b) Elastic zone has straight boundaries inclined at (Theta = theta) to the horizontal and plastic zones fully developed

c) Failure zones do not extend above the horizontal plane through the base of the footing

d) All of the above

19 / 30

19. The safe B.C. of a soil can be defined as:

a) Ultimate load on the bearing area

b) Load intensity beyond which the soil should not be loaded

c) Load at which the soil fails

d) Load beyond which the soil yields

20 / 30

20. Cohesive soils:

a) bear high shear strength

b) are more plastic

c) are good for backfill

d) are strong against landslides

21 / 30

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

a) 1.0 and 0.0

b) 0.0 and 1.0

c) 0.5 and 1.0

d) 1.0 and 0.5

22 / 30

22. Plasticity index is obtained as the difference between

a) Liquid limit and shrinkage limit

b) Shrinkage limit and plastic limit

c) Liquid limit and plastic limit

d) None of the above

23 / 30

23. The reduction factor to the bearing capacity of soil due to the water table at a depth equal to half of the width of the footing below the footing is:

a) 0.25

b) 0.50

c) 0.75

d) 1.00

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24. The ratio of the difference between the void ratio of the soil in its loosest and its natural state and fully dense state is termed as

a) Degree of density

b) Density index

c) Relative density

d) Any of the above

25 / 30

25. 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

26 / 30

26. 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

27 / 30

27. 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

28 / 30

28. Raft foundation is a type of:

a) Deep foundation

b) Shallow foundation

c) Foundation under water

d) None of the above

29 / 30

29. A decrease in water content results in a reduction of the volume of a soil in

a) Liquid state

b) Plastic state

c) Semi-liquid state

d) All of the above

30 / 30

30. Electrical analogy method is used to

a) Find electrical conductivity of soil

b) Draw flow net

c) Find the depth to the water table

d) Find the water content in a soil

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Soil Mechanics Online Test – Paper 2

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