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Rock Mechanics and Rock Engineering MCQs Questions & Answers | Geological Engineering

Learn and practice multiple-choice questions (MCQs) with answers related to Rock Mechanics and Rock Engineering. These resources are available for Geological engineering students who wish to clear GATE exams, technical interviews, competitive examinations, and other entrance exams. The Rock Mechanics and Rock Engineering chapter is particularly important for students studying Geological engineering. Page-9 section-1

Each section contains 100 MCQs on Rock Mechanics and Rock Engineering .
81
Which type of stress is responsible for rock folding?
Discuss
Answer & Solution
Answer: Option C
Solution:
Compressive stress leads to rock folding when rocks are subjected to compressive forces over long periods.
82
Which parameter does NOT influence shear strength in rocks?
Discuss
Answer & Solution
Answer: Option B
Solution:
While porosity affects permeability and strength, it is not a direct parameter in the Mohr-Coulomb equation for shear strength.
83
Which rock type is most likely to fail by brittle fracture?
Discuss
Answer & Solution
Answer: Option A
Solution:
Sandstone, being strong and rigid, tends to exhibit brittle failure, where it breaks suddenly without significant deformation.
84
What is the general behavior of metamorphic rocks under load?
Discuss
Answer & Solution
Answer: Option B
Solution:
Metamorphic rocks often show elastic-plastic behavior, especially under high confining pressure, allowing limited deformation before failure.
85
The main purpose of joint mapping in rock masses is to:
Discuss
Answer & Solution
Answer: Option C
Solution:
Joint mapping is done to understand the orientation, persistence, spacing, and roughness of joints, critical for stability analysis.
86
The Hoek-Brown criterion is an empirical method used for:
Discuss
Answer & Solution
Answer: Option C
Solution:
The Hoek-Brown failure criterion is commonly used to estimate the strength of fractured rock masses, particularly in slopes and tunnels.
87
In stress-strain behavior of rocks, the area under the curve represents:
Discuss
Answer & Solution
Answer: Option B
Solution:
The area under the stress-strain curve represents fracture or strain energy, i.e., the energy absorbed before failure.
88
What role does water play in reducing rock strength?
Discuss
Answer & Solution
Answer: Option C
Solution:
Water acts as a lubricant in rock joints and fissures, reducing friction and hence, reducing effective strength.
89
Which rock feature has the most impact on rock slope stability?
Discuss
Answer & Solution
Answer: Option A
Solution:
Joint orientation relative to the slope face is crucial.Unfavorable orientation can lead to planar or wedge failures.
90
Which type of failure is most associated with columnar basalt formations?
Discuss
Answer & Solution
Answer: Option A
Solution:
Flexural toppling is common in columnar jointed basalts where columns tilt and topple due to their joint pattern and orientation.