Geotechnical Engineering MCQs Set-3

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

clay

sand

gravel

silt

22. 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 effective stress does not change

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

23. 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 no change in plasticity index

decrease in both liquid limit and plasticity index

decrease in liquid limit and increase in plasticity index

24. Bishop's method of stability analysis

neglects the effect of forces acting on the sides of the slices

is more conservative

assumes the slip surface as an arc of a circle

all of these

25. 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

calcium carbide method

sand bath method

alcohol method

26. Coefficient of earth pressure at rest is

greater than active earth pressure but less than passive earth pressure

less than active pressure but greater than passive earth pressure

less than both the active and passive earth pressures

greater than both the active pressure and passive earth pressure

27. Physical properties of a permeant which influence permeability are

both viscosity and unit weight

none of these

unit weight only

viscosity only

28. The value of compression index for a remoulded sample whose liquid limit is 50% is

0.028

0.28

0.036

0.36

29. Water content of soil can

never be greater than 100%

be less than 0%

be greater than 100%

take values only from 0% to 100%

30. Quick sand is a

flow condition occurring in cohesive soils

flow condition occurring in both cohesive and cohesionless soils

flow condition occurring in cohesionless soils

type of sand

Geotechnical Engineering MCQs Set-3

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