Geotechnical Engineering MCQ

Study Geotechnical Engineering MCQs to learn the various concepts associated with the engineering behaviour of soil. This topic covers soil mechanics, foundation engineering, slope stability, earth pressures, bearing capacity of foundation soil, compaction of soil, permeability of soil, consolidation of soil and the various geotechnical engineering concepts relevant for GATE, SSC JE, RRB JE, State AE/JE exams etc.

Q1. What is the meaning of geotechnical engineering?

Correct Answer: A

Geotechnical engineering deals with soil and rock mechanics.

Q2. Soil is defined as:

Correct Answer: A

Soil consists of solid particles, water and air.

Q3. Atterberg limits determine:

Correct Answer: A

They classify soil consistency.

Q4. Boundary between moist soil and saturated soil is called:

Correct Answer: B

Phreatic surface separates saturated and unsaturated zones.

Q5. Primary objective of consolidation test is to determine:

Correct Answer: A

Consolidation test studies soil settlement under load.

Q6. Cohesion in soil refers to:

Correct Answer: A

Cohesion is particle-to-particle attraction.

Q7. Which test determines soilโ€™s shear strength?

Correct Answer: A

Direct shear test measures shear strength.

Q8. Standard Penetration Test (SPT) measures:

Correct Answer: A

SPT tests give soil strength estimates.

Q9. Soil liquefaction occurs mainly in:

Correct Answer: A

Liquefaction is loss of soil strength due to shaking.

Q10. Angle of internal friction (u03B4) represents:

Correct Answer: A

Friction angle is shear resistance measure.

Q11. At higher void ratios soils are:

Correct Answer: A

Higher void ratios mean loose soil.

Q12. The term "permeability" refers to:

Correct Answer: A

Permeability is fluid flow property.

Q13. Critical shear stress is?

Correct Answer: A

Critical shear stress causes failure.

Q14. Which soil property affects compressibility?

Correct Answer: A

Clayey soils behave more compressibly.

Q15. Consolidation in soils involves:

Correct Answer: A

Consolidation causes settlement.

Q16. Coefficient of permeability is expressed in:

Correct Answer: A

Units indicate velocity of fluid flow.

Q17. The behavior of clay soil is largely influenced by:

Correct Answer: A

Clay properties depend on moisture.

Q18. Compaction of soil is carried out to:

Correct Answer: A

Compaction improves soil load bearing.

Q19. Which test measures soil plasticity?

Correct Answer: A

Atterberg limits measure plasticity.

Q20. Which of the following is a method of soil improvement?

Correct Answer: A

Preloading consolidates soil.

Q21. Drainage is essential in soil because:

Correct Answer: A

Waterlogged soils are weak.

Q22. Unconfined compressive strength test is used for:

Correct Answer: A

It is valid mainly for clay.

Q23. What does permeability depend upon?

Correct Answer: A

Permeability depends on pore structure.

Q24. The standard penetration test blow count is the number of blows required to:

Correct Answer: A

Blow count is measured during penetration.

Q25. Which soil is more prone to swelling?

Correct Answer: A

Expansive clay changes volume with moisture.

Q26. What is the primary purpose of soil sampling?

Correct Answer: A

Sampling retrieves soil for tests.

Q27. The CBR test measures:

Correct Answer: A

CBR indicates subgrade strength.

Q28. Which of the following influences soil shear strength?

Correct Answer: A

Shear strength depends on moisture and compaction.

Q29. Tensile strength of soil is generally:

Correct Answer: A

Soils have negligible tensile strength.

Q30. Which test characterizes soil grain size distribution?

Correct Answer: A

Sieve analysis finds particle size.

Q31. Slip circle method is used to analyze:

Correct Answer: A

Used in calculating slope failure.

Q32. The specific gravity of soil solids is typically around:

Correct Answer: A

Average specific gravity is 2.65.

Q33. Vane shear test is used for:

Correct Answer: A

Vane test measures shear strength.

Q34. Shear strength consists of two components:

Correct Answer: A

Cohesion and friction form shear strength.

Q35. What is the typical permeability range of clay?

Correct Answer: A

Clay is very impermeable.

Q36. Compaction of soil is performed to:

Correct Answer: A

Compaction increases density and bearing capacity.

Q37. The percentage voids in soil is called:

Correct Answer: A

Porosity is void volume as percentage of total.

Q38. How does increasing moisture content affect dry density?

Correct Answer: A

Dry density peaks at optimum moisture.

Q39. Which soil property affects liquefaction potential?

Correct Answer: A

Saturated sands are risky for liquefaction.

Q40. Load transfer by end bearing piles happens at:

Correct Answer: A

End bearing piles rest load on soil at tip.

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