MCQ
1. The angle that Coulomb's failure envelope makes with the horizontal is called
Cohesion
Angle of internal friction
Angle of repose
None of the above
2. Failure of the stability of slopes, generally occurs along
Slip plane
A horizontal surface
A curved surface
All the surfaces
3. The method of the slices is applicable to
Homogenous soils
Stratified soils
Saturated soils
Non-uniform slopes
4. If the coefficient of the active pressure Ka is 1/3, the coefficient of passive pressure Kp, is-
1/3
1
2/3
3
5. Pick up the correct definition from the following:
The lateral pressure exerted by the soil when the retaining wall moves away from the back fill, is generally known as active earth pressure of the soll
The lateral pressure exerted by the soil when the retaining wall moves towards the soil, is generally known as 'Passive earth pressure of the soil
The lateral pressure exerted by the soil when the retaining wall has no movement relative to the back fill, is known as 'earth pressure at rest of the soil
All the above
6. Sensitivity of a soil can be defined as-
Percentage of volume change of soil under saturated condition
Ratio of compressive strength of unconfined undisturbed soil to that of soil in a remoulded state
Ratio of volume of voids to volume of solids
None of the above
7. The density of soil can be increased
By reducing the space occupied by air
By elastic compression of soil grains
By expelling water from pores
All the above
8. A flow net may be utilised for the determination of
Exit gradient
Seepage
Hydrostatic pressure
All the above
9. The shearing force acting along the slice of a curved surface of slippage, causes the soil to slide
A Down at the centre
Down at the toe
Upward at the centre
None of these
10. Soils containing organic matters
Are of spongy nature
Swell with decrease of moisture
Shrink with increase of moisture content
None of these
11. Pick up the correct statement from the following:
Kaolinite is most stable clay
Kaolinite shows a very little sign of swelling on wetting
Kaolinite is also called China clay
All the above
12. The property of a soil which allows it to be deformed rapidly without rupture, elastic rebound and also a volume change, is known
Porosity
Plasticity
Permeability
Ductility
13. Pick up the correct statement from the following
Coefficient of compressibility is the decrease in void ratio per unit increase of pressure
The percent settlement at any time is called degree of consolidation
Time factor is a dimensionless quantity
All the above
14. Skempton's pore pressure coefficient B for saturated soil is
1
Zero
Between 0 and 1
Greater than 1
15. Shear strength of a soil is a unique function of
Effective stress only
Total stress only
Both effective stress and total stress
None of the above
16. The compression index of a soil
Decreases with an increase in the liquid limit
Increases with an increase in the liquid limit
Decreases with an increase in the plastic limit
Is not related with plastic limit
17. Buoyant unit weight equals the saturated density
Multiplied by unit weight of water
Divided by unit weight of water
Plus unit weight of water
Minus unit weight of water
18. The change of moisture content of soils, changes the
Value of the angle of repose
Amount of compaction required
Cohesive strength of soil
All the above
19. With the increase in the amount of compaction energy-
Optimum water content increases but maximum dry density decreases
Optimum water content decreases but maximum dry density increases
Both optimum water content and maximum dry density increase
Both optimum water content and maximum dry density decrease
20. Direct measurement of permeability of the specimen at any stage of loading can be made
Only in fixed ring type consolidometer
Only in floating ring type consolidometer
Both (A) and (B)
None of the above