free Model Online Soil Mechanics and Foundation Engineering test2

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1. At liquid limit, all soils possess _____.
same shear strength of small magni-tude	same shear strength of large magni-tude
different shear strengths of small magnitude	different shear strengths of large magnitude

2. If the material of the base of the Casagrande liquid limit device on which the cup containing soil paste drops is softer than the standard hard rubber, then
the liquid limit of soil always increases	the liquid limit of soil always decreases
the liquid limit of soil may increase	the liquid limit of soil may decrease

3. According to IS classification, the range of silt size particles is ______.
4.75 mm to 2.00 mm	2.00 mm to 0.425 mm
0.425 mm to 0.075 mm	0.075 mm to 0.002 mm

4. Highway Research Board (HRB) classification of soils is based on ______.
particle size composition	plasticity characteristics
both particle size composition and plasticity characteristics	none of the above

5. Inorganic soils with low compressibility are represented by _____.
MH	SL
ML	CH

6. Sand particles are made of _____.
rock minerals	kaolinite
illite	montmorillonite

7. The clay mineral with the largest swelling and shrinkage characteristics is _____.
kaolinite	illite
montmorillonite	none of the above

8. Dispersed type of soil structure is an arrangement comprising particles having ______.
face to face or parallel orientation	edge to edge orientation
edge to face orientation	all of the above

9. Effective stress is ______.
the stress at particles contact	a physical parameter that can be measured
important because it is a function of engineering properties of soil	all of the above

10. Rise of water table above the ground surface causes
equal increase in pore water pressure and total stress	equal decrease in pore water pressure and total stress
increase in pore water pressure but decrease in total stress	decrease in pore water pressure but increase in total stress

11. The total and effective stresses at a depth of 5 m below the top level of water in a swimming pool are respectively
zero and zero	0.5 kg/cm2 and zero
0.5 kg/cm2 and 0.5 kg/cm2	1.0 kg/cm2 and 0.5 kg/cm2

12. If the water table rises upto ground surface, then the _____.
effective stress is reduced due to decrease in total stress only but pore water pressure does not change	effective stress is reduced due to increase in pore water pressure only but total stress does not change
total stress is reduced due to increase in pore water pressure only but effec-tive stress does not change	total stress is increased due to de-crease in pore water pressure but effective stress does not change

13. Quick sand is a ____.
type of sand	flow condition occurring in cohesive soils
flow condition occurring in cohesionless soils	flow condition occurring in both cohesive and cohesionless soils

14. The hydraulic head that would produce a quick condition in a sand stratum of thickness 1.5 m, specific gravity 2.67 and voids ratio 0.67 is equal to ______.
1.0 m	1.5 m
2.0 m	3 m

15. Physical properties of a permeant which influence permeability are ______.
viscosity only	unit weight only
both viscosity and unit weight	none of the above

16. Select the correct statement.
The greater the viscosity, the greater is permeability.	The greater the unit weight, the greater is permeability.
The greater the unit weight, the smaller is permeability.	Unit weight does not affect per-meability.

17. Effective stress on soil ______.
increases voids ratio and decreases permeability	increases both voids ratio and per-meability
decreases both voids ratio and per-meability	decreases voids ratio and increases permeability

18. If the permeability of a soil is 0.8 mm/sec, the type of soil is _____.
gravel	sand
silt	clay

19. Which of the following methods is more suitable for the determination of permeability of clayey soil ?
constant head method	falling head method
horizontal permeability test	none of the above

20. Which of the following methods is best suited for determination of permeability of coarse-grained soils ?
constant head method	falling head method
both the above	none of the above