Geotechnical Engineering MCQs Set-3

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

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

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

22. The slope of isochrone at any point at a given time indicates the rate of change of

effective stress with time

pore water pressure with time

effective stress with depth

pore water pressure with depth

23. Void ratio of a soil mass can

never be greater than unity

take any value greater than zero

be zero

take values between 0 and 1 only

24. Skempton's pore pressure coefficient B for saturated soil is

greater than 1

1

between 0 and 1

zero

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

0.28

0.036

0.36

0.028

26. If the sand in-situ is in its densest state, then the relative density of sand is

between 0 and 1

greater than 1

zero

1

27. Coefficient of earth pressure at rest is

less than active pressure but greater than passive earth pressure

greater than both the active pressure and passive earth pressure

greater than active earth pressure but less than passive earth pressure

less than both the active and passive earth pressures

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

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

increase in both liquid limit and plasticity index

29. A combined footing is generally used when

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

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

there is only one column

number of columns is two and they are spaced far apart

30. Negative skin friction on a pile

acts upward and increases the load carrying capacity of the pile

acts downward and increases the load carrying capacity of the pile

acts upward and reduces the load carrying capacity of the pile

acts downward and reduces the load carrying capacity of the pile

Geotechnical Engineering MCQs Set-3

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