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Engineering Properties of Rocks and Soils MCQs Questions & Answers | Geological Engineering

Learn and practice multiple-choice questions (MCQs) with answers related to Engineering Properties of Rocks and Soils. These resources are available for Geological engineering students who wish to clear GATE exams, technical interviews, competitive examinations, and other entrance exams. The Engineering Properties of Rocks and Soils chapter is particularly important for students studying Geological engineering. Page-3 section-1

21
Which of the following properties increases with soil compaction?
Discuss
Answer & Solution
Answer: Option
Solution:
Shear strength improves as soil particles are packed more tightly during compaction.This enhances contact between particles, increasing internal friction and stability.
22
What is the major engineering concern with expansive soils?
Discuss
Answer & Solution
Answer: Option
Solution:
Expansive soils swell when wet and shrink when dry, causing volume changes.This can damage foundations, pavements, and other structures.
23
Which of these is not a type of soil consistency limit?
Discuss
Answer & Solution
Answer: Option
Solution:
Elastic limit is a mechanical concept, not part of the Atterberg limits which include liquid, plastic, and shrinkage limits.
24
Which property of a rock increases its resistance to weathering?
Discuss
Answer & Solution
Answer: Option
Solution:
Quartz is a durable, chemically stable mineral.Rocks with high quartz content weather more slowly than those with feldspar or clay minerals.
25
The water content at which soil changes from plastic to liquid state is called:
Discuss
Answer & Solution
Answer: Option
Solution:
Liquid limit is the water content at which soil begins to flow like a liquid.It is an important parameter in soil classification and behavior.
26
Which factor directly influences the cohesion in clayey soils?
Discuss
Answer & Solution
Answer: Option
Solution:
Electrochemical forces between clay particles lead to cohesion.These forces arise from surface charges and water films between particles.
27
Which test determines maximum dry density of soil?
Discuss
Answer & Solution
Answer: Option
Solution:
The Proctor test evaluates the compaction characteristics of soil.It helps determine the optimal moisture content and maximum dry density.
28
Which of the following describes a poorly graded soil?
Discuss
Answer & Solution
Answer: Option
Solution:
Poorly graded soil has particles of nearly the same size.It compacts poorly and has high permeability.
29
What is the relationship between porosity and permeability?
Discuss
Answer & Solution
Answer: Option
Solution:
Porosity refers to void spaces, and permeability is how easily fluids flow through them.Generally, more porosity allows higher permeability, though not always linearly.
30
The modulus of elasticity of rock indicates its:
Discuss
Answer & Solution
Answer: Option
Solution:
Modulus of elasticity is a measure of stiffness�how much a rock deforms under stress.High modulus = less deformation.