"Soil Mechanics and Foundation Engineering"
1. Residual soils are formed by
a) glaciers
b) wind
c) water
d) none of the above
Ans:d
2. Water content of soil can
a) never be greater than 100 %
b) take values only from 0 % to 100 %
c) be less than 0 %
d) be greater than 100 %
Ans:d
3. Which of the following types of soil is transported by gravitational forces ?
a) loess
b) talus
c) drift
d) dune sand
Ans:b
4. A fully saturated soil is said to be
a) one phase system
b) two phase system with soil and air
c) two phase system with soil and water
d) three phase system
Ans:c
5. Valid range for S, the degree of saturation of soil in percentage is
a) S>0
b) S<0
c) 0<S<100
d) 0 < S < 100
Ans:d
7. A soil has a bulk density of 22 kN/m3 and water content 10 %. The dry density of soil is
a) 18.6 kN/m3
b) 20.0 kN/m3
c) 22.0 kN/m3
d) 23.2 kN/m3
Ans:b
8. If the voids of a soil mass are full of air only, the soil is termed as
a) air entrained soil
b) partially saturated soil
c) dry soil
d) dehydrated soil
Ans:c
9. Valid range for n, the percentage voids, is
a) 0<n<100
b) 0<n<100
c) n>0
d) n<0
Ans:a
10. Select the correct statement.
a) Unit weight of dry soil is greater than unit weight of wet soil.
b) For dry soils, dry unit weight is less than total unit weight.
c) Unit weight of soil increases due to submergence in water.
d) Unit weight of soil decreases due to submergence in water.
Ans:d
11. Voids ratio of a soil mass can
a) never be greater than unity
b) be zero
c) take any value greater than zero
d) take values between 0 and 1 only
Ans:c
12. 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
Ans:c
13. When the degree of saturation is zero, the soil mass under consideration represents
a) one phase system
b) two phase system with soil and air
c) two phase system with soil and water
d) three phase system
Ans:b
14. Select the correct range of density index,ID
a) lD>0
b) ID>0
c) 0 < lD < 1
d) 0 < ID < 1
Ans:d
15. If the degree of saturation of a partially saturated soil is 60%, then air content of the soil is
a) 40%
b) 60%
c) 80%
d) 100%
Ans:a
16. If the water content of a fully saturated soil mass is 100%, then the voids ratio of the sample is
a) less than specific gravity of soil
b) equal to specific gravity of soil
c) greater than specific gravity of soil
d) independent of specific gravity of soil
Ans:b
17. The ratio of volume of voids to the total volume of soil mass is called
a) air content
b) porosity
c) percentage air voids
d) voids ratio
Ans:b
18. Relative density of a compacted dense sand is approximately equal to
a) 0.4
b) 0.6
c) 0.95
d) 1.20
Ans:c
19. If the sand in-situ is in its densest state, then the relative density of sand is
a) zero
b) 1
c) between 0 and 1
d) greater than 1
Ans:b
20. Which of the following methods is most accurate for the determination of the water content of soil ?
a) oven drying method
b) sand bath method
c) calcium carbide method
d) pycnometer method
Ans:a
21. For proper field control, which of the following methods is best suited for quick determination of water content of a soil mass ?
a) oven drying method
b) sand bath method
c) alcohol method
d) calcium carbide method
Ans:d
22. A pycnometer is used to determine
a) water content and voids ratio
b) specific gravity and dry density
c) water content and specific gravity
d) voids ratio and dry density
Ans:c
23. Stoke's law is valid only if the size of particle is
a) less than 0.0002 mm
b) greater than 0.2 mm
c) between 0.2 mm and 0.0002 mm
d) all of the above
Ans:c
a) glaciers
b) wind
c) water
d) none of the above
Ans:d
2. Water content of soil can
a) never be greater than 100 %
b) take values only from 0 % to 100 %
c) be less than 0 %
d) be greater than 100 %
Ans:d
3. Which of the following types of soil is transported by gravitational forces ?
a) loess
b) talus
c) drift
d) dune sand
Ans:b
4. A fully saturated soil is said to be
a) one phase system
b) two phase system with soil and air
c) two phase system with soil and water
d) three phase system
Ans:c
5. Valid range for S, the degree of saturation of soil in percentage is
a) S>0
b) S<0
c) 0<S<100
d) 0 < S < 100
Ans:d
7. A soil has a bulk density of 22 kN/m3 and water content 10 %. The dry density of soil is
a) 18.6 kN/m3
b) 20.0 kN/m3
c) 22.0 kN/m3
d) 23.2 kN/m3
Ans:b
8. If the voids of a soil mass are full of air only, the soil is termed as
a) air entrained soil
b) partially saturated soil
c) dry soil
d) dehydrated soil
Ans:c
9. Valid range for n, the percentage voids, is
a) 0<n<100
b) 0<n<100
c) n>0
d) n<0
Ans:a
10. Select the correct statement.
a) Unit weight of dry soil is greater than unit weight of wet soil.
b) For dry soils, dry unit weight is less than total unit weight.
c) Unit weight of soil increases due to submergence in water.
d) Unit weight of soil decreases due to submergence in water.
Ans:d
11. Voids ratio of a soil mass can
a) never be greater than unity
b) be zero
c) take any value greater than zero
d) take values between 0 and 1 only
Ans:c
12. 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
Ans:c
13. When the degree of saturation is zero, the soil mass under consideration represents
a) one phase system
b) two phase system with soil and air
c) two phase system with soil and water
d) three phase system
Ans:b
14. Select the correct range of density index,ID
a) lD>0
b) ID>0
c) 0 < lD < 1
d) 0 < ID < 1
Ans:d
15. If the degree of saturation of a partially saturated soil is 60%, then air content of the soil is
a) 40%
b) 60%
c) 80%
d) 100%
Ans:a
16. If the water content of a fully saturated soil mass is 100%, then the voids ratio of the sample is
a) less than specific gravity of soil
b) equal to specific gravity of soil
c) greater than specific gravity of soil
d) independent of specific gravity of soil
Ans:b
17. The ratio of volume of voids to the total volume of soil mass is called
a) air content
b) porosity
c) percentage air voids
d) voids ratio
Ans:b
18. Relative density of a compacted dense sand is approximately equal to
a) 0.4
b) 0.6
c) 0.95
d) 1.20
Ans:c
19. If the sand in-situ is in its densest state, then the relative density of sand is
a) zero
b) 1
c) between 0 and 1
d) greater than 1
Ans:b
20. Which of the following methods is most accurate for the determination of the water content of soil ?
a) oven drying method
b) sand bath method
c) calcium carbide method
d) pycnometer method
Ans:a
21. For proper field control, which of the following methods is best suited for quick determination of water content of a soil mass ?
a) oven drying method
b) sand bath method
c) alcohol method
d) calcium carbide method
Ans:d
22. A pycnometer is used to determine
a) water content and voids ratio
b) specific gravity and dry density
c) water content and specific gravity
d) voids ratio and dry density
Ans:c
23. Stoke's law is valid only if the size of particle is
a) less than 0.0002 mm
b) greater than 0.2 mm
c) between 0.2 mm and 0.0002 mm
d) all of the above
Ans:c
