Here are top 60 Soil Mechanics Interview questions and their answers are given just below to them. These sample Soil Mechanics questions are framed by experts. who train for Learn Soil Mechanics Online to give you an idea of type of questions which may be asked in interview. We have taken full care to give correct answers for all the questions. Do comment your thoughts. Happy Job Hunting!
1) List ‘k’ values for different types of soils.
2) How permeability test is done in the field?
3) Mention other permeability tests that can be done in the lab.
4) What is the application of permeability of soils?
5) Derive the expression for ‘k’ by falling head method.
6) Is hydraulic gradient constant in variable head test? Why?
7) How will you reduce observed permeability to permeability at standard temperature?
8) What is the necessity of two methods for determination of ‘k’ in lab?
9) Estimate discharge velocity in constant head test conducted. What is seepage velocity?
10) Time interval for flow from h1 to h0 should be same as that from h0 to h2. Why?
11) Depth of hole made in field is limited to 15 cm. Why?
12) Explain core cutter method for determination of in-situ density of soil.
13) Explain the significance of in-situ density soil density determination.
14) What is the approximate value of degree of saturation at OMC?
15) How does amount of compaction affect maximum dry density and OMC?
16) What is the procedure for conducting modified proctor test?
17) What is the use of proctor’s needle? How is it used for compaction control in the field?
18) Explain how soil compaction is achieved?
19) How correction for initial concavity is done in load-penetration curve?
20) What is the application of CBR test results?
21) Write the procedure to find expansion ratios for a soaked test.
22) What is the need for adding surcharge weights?
23) Draw plasticity chart and mark the soil tested and classify soil.
24) What is activity number?
25) Why clay exhibit plasticity while silt does not?
26) Indicate engineering uses of IP, IT, IL and IC.
27) Is soil fully saturated at shrinkage limit?
28) Explain the one point method for liquid limit determination.
29) If the plastic limit is greater than or equal to liquid limit, how will you report IP of the soil?
30) If plastic limit can’t be determined for sandy soil, how will you report plasticity index?
31) Whether oven drying of sample before test is permitted? If not why?
32) Find compression index of given normally sensitive clay. What is the use of it?
33) How will you differentiate organic and inorganic soil using liquid limit test?
34) What is the use of Cv? When it is used?
35) Can permeability be determined from consolidation test indirectly?
36) Which type of permeability test can be done directly? Explain.
37) What result do you expect if a consolidation test is conducted on sand?
38) Suppose loading pad is placed such that it touches the sides of the ring. What will happen?
39) If entrapped air is not removed completely, how will it affect the value of G of soil solids?
40) Specify the range for the specific gravity of soil solids.
41) What is the practical application of specific gravity of soil solids?
42) What are the limitations of this test?
43) Draw mohr’s circle for failure for a direct shear test and mark the failure plane, major and minor principal plane.
44) If test is done under normal stress of 40 N/cm2, find the shear load at which this soil will fail.
45) What is the procedure for determination of shear strength parameters of clay using direct shear test?
46) Pour dry sand on horizontal surface and find angle of repose. Compare this angle with angle of shearing resistance.
47) What are the advantages of triaxial test over direct shear test?
48) What is the practical significance of cell pressure in this test?
49) Explain the changes to be incorporated for a drained test, in the procedure for undrained test.
50) Explain the stress conditions at the time of failure by drawing mohr’s circle.
51) What do you mean by sensitivity of clay?
52) Draw mohr’s circle for state of stress at failure in an unconfined compression test.
53) This test is used only for cohesive soils. Why?
54) Explain the relation between consistency and UCC value of clay.
55) Explain the terms sensitivity and thixotropy.
56) What type of soil yield dependable results by vane shear test? Why?
57) Why are different sizes of blades used in field vane shear test?
58) Why this test is an undrained test?
59) Is it possible to determine the effective shear strength parameters in vane shear test?
1) List ‘k’ values for different types of soils.
2) How permeability test is done in the field?
3) Mention other permeability tests that can be done in the lab.
4) What is the application of permeability of soils?
5) Derive the expression for ‘k’ by falling head method.
6) Is hydraulic gradient constant in variable head test? Why?
7) How will you reduce observed permeability to permeability at standard temperature?
8) What is the necessity of two methods for determination of ‘k’ in lab?
9) Estimate discharge velocity in constant head test conducted. What is seepage velocity?
10) Time interval for flow from h1 to h0 should be same as that from h0 to h2. Why?
11) Depth of hole made in field is limited to 15 cm. Why?
12) Explain core cutter method for determination of in-situ density of soil.
13) Explain the significance of in-situ density soil density determination.
14) What is the approximate value of degree of saturation at OMC?
15) How does amount of compaction affect maximum dry density and OMC?
16) What is the procedure for conducting modified proctor test?
17) What is the use of proctor’s needle? How is it used for compaction control in the field?
18) Explain how soil compaction is achieved?
19) How correction for initial concavity is done in load-penetration curve?
20) What is the application of CBR test results?
21) Write the procedure to find expansion ratios for a soaked test.
22) What is the need for adding surcharge weights?
23) Draw plasticity chart and mark the soil tested and classify soil.
24) What is activity number?
25) Why clay exhibit plasticity while silt does not?
26) Indicate engineering uses of IP, IT, IL and IC.
27) Is soil fully saturated at shrinkage limit?
28) Explain the one point method for liquid limit determination.
29) If the plastic limit is greater than or equal to liquid limit, how will you report IP of the soil?
30) If plastic limit can’t be determined for sandy soil, how will you report plasticity index?
31) Whether oven drying of sample before test is permitted? If not why?
32) Find compression index of given normally sensitive clay. What is the use of it?
33) How will you differentiate organic and inorganic soil using liquid limit test?
34) What is the use of Cv? When it is used?
35) Can permeability be determined from consolidation test indirectly?
36) Which type of permeability test can be done directly? Explain.
37) What result do you expect if a consolidation test is conducted on sand?
38) Suppose loading pad is placed such that it touches the sides of the ring. What will happen?
39) If entrapped air is not removed completely, how will it affect the value of G of soil solids?
40) Specify the range for the specific gravity of soil solids.
41) What is the practical application of specific gravity of soil solids?
42) What are the limitations of this test?
43) Draw mohr’s circle for failure for a direct shear test and mark the failure plane, major and minor principal plane.
44) If test is done under normal stress of 40 N/cm2, find the shear load at which this soil will fail.
45) What is the procedure for determination of shear strength parameters of clay using direct shear test?
46) Pour dry sand on horizontal surface and find angle of repose. Compare this angle with angle of shearing resistance.
47) What are the advantages of triaxial test over direct shear test?
48) What is the practical significance of cell pressure in this test?
49) Explain the changes to be incorporated for a drained test, in the procedure for undrained test.
50) Explain the stress conditions at the time of failure by drawing mohr’s circle.
51) What do you mean by sensitivity of clay?
52) Draw mohr’s circle for state of stress at failure in an unconfined compression test.
53) This test is used only for cohesive soils. Why?
54) Explain the relation between consistency and UCC value of clay.
55) Explain the terms sensitivity and thixotropy.
56) What type of soil yield dependable results by vane shear test? Why?
57) Why are different sizes of blades used in field vane shear test?
58) Why this test is an undrained test?
59) Is it possible to determine the effective shear strength parameters in vane shear test?
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