Quiznetik

Soil Mechanics and Foundations | Set 3

1. The liquid limit exists in

Correct : D. clays

2. The equipotential line in a seepage through a soil medium is defined as the

Correct : B. line connecting points of equal head of water

3. The coefficient of active earth pressure is always

Correct : B. less

4. The ratio of the unconfined compressive strength of undisturbed soil to the unconfined compressive strength of soil in a remoulded state, is called

Correct : A. sensitivity

5. The angle of internal friction of round grained dense sand is about

Correct : D. 32? to 37?

6. The soil transported by glaciers either by ice or water is called

Correct : C. Drift

7. The neutral stress is

Correct : B. decreases

8. The strength of a soil is usually identified by

Correct : C. ultimate shear stress

9. When applying Darcy's law to soils, it assumed that the

Correct : D. all of these

10. The consolidation of a soil is defined as the

Correct : D. any one of the above

11. The liquid limit minus plastic limit is termed as

Correct : B. plasticity index

12. The piping failure in a hydraulic structure can be prevented by

Correct : D. all of the above

13. The critical height in the stability of soil is the

Correct : B. macimum height at which it is possible for the sloped bank of soil to be stable

14. The activity of clay is defined as the ratio of

Correct : C. plasticity index to clay fraction

15. The exit gradient of the seepage of water through a soil medium is the

Correct : D. ratio of the head loss to the length of seepage

16. The unconfined compressive strength of a very soft clay is

Correct : A. 10 to 25 kN/m2

17. A soil is in a semi-solid state, if the consistency index is

Correct : C. more than unity

18. The unit weight of a soil at zero air voids depends upon

Correct : D. all of these

19. The maximum unit pressure that a soil can withstand without rupture in shear or without excessive settlement of the structure, is called

Correct : B. safe bearing capacity

20. The effect of cohesion is to

Correct : A. decrease

21. If a shear stress is applied on a dense sand, the shear strain caused will

Correct : A. increase

22. In case of footings in sand, if the soil pressure distribution is triangular, the maximum soil pressure is

Correct : B. double

23. The water content of soils can be accurately determined by

Correct : C. over drying method

24. The standard temperature at which the hydrometer is calibrated is

Correct : D. 27?C

25. The relation between the air content (ac) and the degree of saturation (s) is

Correct : B. ac = 1 - s

26. Black cotton soils are

Correct : A. expensive

27. A soil containing continuous voids is called

Correct : A. permeable

28. The property of a soil which enables to regain its strength lost on remoulding in a short time, without change of moisture content, is called

Correct : C. thixotropy