Online Quiz Soil Mechanics and Foundation Engineering test1

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1. Residual soils are formed by ______.
glaciers	wind
water	none of the above

2. Water content of soil can _____.
never be greater than 100 %	take values only from 0 % to 100 %
be less than 0 %	be greater than 100 %

3. Which of the following types of soil is transported by gravitational forces ?
loess	talus
drift	dune sand

4. A fully saturated soil is said to be _____.
one phase system	two phase system with soil and air
two phase system with soil and water	three phase system

5. A soil has a bulk density of 22 kN/m3 and water content 10 %. The dry density of soil is
18.6 kN/m3	20.0 kN/m3
22.0 kN/m3	23.2 kN/m3

6. If the voids of a soil mass are full of air only, the soil is termed as _____.
air entrained soil	partially saturated soil
dry soil	dehydrated soil

7. Valid range for n, the percentage voids, is
0	0
n>0	n<0

8. Select the correct statement.
Unit weight of dry soil is greater than unit weight of wet soil	For dry soils, dry unit weight is less than total unit weight.
Unit weight of soil increases due to submergence in water.	Unit weight of soil decreases due to submergence in water.

9. Voids ratio of a soil mass can _____.
never be greater than unity	be zero
take any value greater than zero	take values between 0 and 1 only

10. 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 ______.
1.0 and 0.0	0.0 and 1.0
0.5 and 1.0	1.0 and 0.5

11. When the degree of saturation is zero, the soil mass under consideration represents ______.
one phase system	two phase system with soil and air
two phase system with soil and water	three phase system

12. Select the correct range of density index,ID
ID > 0	ID < 0
0 < ID < 1	0 < ID < 1

13. If the degree of saturation of a partially saturated soil is 60%, then air content of the soil is _____.
40%	60%
80%	100%

14. If the water content of a fully saturated soil mass is 100%, then the voids ratio of the sample is ______.
less than specific gravity of soil	equal to specific gravity of soil
greater than specific gravity of soil	independent of specific gravity of soil

15. The ratio of volume of voids to the total volume of soil mass is called ______.
air content	porosity
percentage air voids	voids ratio

16. Relative density of a compacted dense sand is approximately equal to ______.
0.4	0.6
0.95	1.20

17. If the sand in-situ is in its densest state, then the relative density of sand is
zero	1
between 0 and 1	greater than 1

18. Which of the following methods is most accurate for the determination of the water content of soil ?
oven drying method	sand bath method
calcium carbide method	pycnometer method

19. For proper field control, which of the following methods is best suited for quick determination of water content of a soil mass ?
oven drying method	sand bath method
alcohol method	calcium carbide method

20. A pycnometer is used to determine ______.
water content and voids ratio	specific gravity and dry density
water content and specific gravity	voids ratio and dry density