Geotechnical Engineering MCQs Set-3

11. The admixture of coarser particles like sand or silt to clay causes

increase in both liquid limit and plasticity index

decrease in liquid limit and increase in plasticity index

decrease in both liquid limit and plasticity index

decrease in liquid limit and no change in plasticity index

12. Which of the following methods is most accurate for the determination of the water content of soil?

pycnometer method

sand bath method

calcium carbide method

oven drying method

13. Which of the following methods is more suitable for the determination of permeability of clayey soil?

constant head method

none of these

falling head method

horizontal permeability test

14. Physical properties of a permeant which influence permeability are

both viscosity and unit weight

unit weight only

viscosity only

none of these

15. Allowable bearing pressure for a foundation depends on

allowable settlement only

none of these

ultimate bearing capacity of soil only

both allowable settlement and ultimate bearing capacity

16. If the water table rises upto ground surface, then the

effective stress is reduced due to increase in pore water pressure only but total stress does not change

effective stress is reduced due to decrease in total stress only but pore water pressure does not change

total stress is reduced due to increase in pore water pressure only but effective stress does not change

total stress is increased due to decrease in pore water pressure but effective stress does not change

17. Coefficient of consolidation for clays normally

increases with increase in liquid limit

remains constant at all liquid limits

decreases with increase in liquid limit

first increases and then decreases with increase in liquid limit

18. If the permeability of a soil is 0.8 mm/sec, the type of soil is

gravel

silt

clay

sand

19. A combined footing is generally used when

there is only one column

number of columns is more than two and they are spaced far apart

number of columns is two and they are spaced far apart

number of columns is two and they are spaced close to each other

20. According to IS classification, the range of silt size particles is

4.75 mm to 2.00 mm

0.075 mm to 0.002 mm

0.425 mm to 0.075 mm

2.00 mm to 0.425 mm

Geotechnical Engineering MCQs Set-3

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