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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-5 section-1

Each section contains 100 MCQs on Rock Mechanics and Rock Engineering .
41
The primary cause of failure in a rock tunnel roof is:
Discuss
Answer & Solution
Answer: Option C
Solution:
Rock tunnel roofs typically fail due to jointed rock masses and insufficient support, leading to blocks falling or sliding.
42
What is the effect of increasing confining pressure on rock strength?
Discuss
Answer & Solution
Answer: Option C
Solution:
Confining pressure increases rock's resistance to deformation and failure, especially in brittle rocks, enhancing strength.
43
Which test determines deformability of rock mass in situ?
Discuss
Answer & Solution
Answer: Option B
Solution:
The Plate Load Test measures the in-situ deformability and bearing capacity of rock by applying load on a rigid plate.
44
What type of rock support is commonly used in weak, fractured rock zones?
Discuss
Answer & Solution
Answer: Option D
Solution:
In weak fractured zones, all of the above�shotcrete, bolts, and anchors�are often used together for composite support.
45
In rock slope analysis, what does wedge failure involve?
Discuss
Answer & Solution
Answer: Option B
Solution:
Wedge failure occurs when a rock block is bounded by two intersecting discontinuities and slides along their line of intersection.
46
Which of the following rock types is most susceptible to weathering?
Discuss
Answer & Solution
Answer: Option C
Solution:
Shale is composed of fine particles and has a laminated structure, making it highly susceptible to weathering under moisture and freeze-thaw cycles.This leads to rapid degradation in exposed conditions.
47
The term RMR stands for:
Discuss
Answer & Solution
Answer: Option B
Solution:
RMR (Rock Mass Rating) is a classification system developed by Bieniawski to assess rock mass quality using parameters such as UCS, joint spacing, groundwater, and orientation.
48
What is the main failure mode in columnar basalt rock slopes?
Discuss
Answer & Solution
Answer: Option C
Solution:
Toppling failure is common in vertical or steeply inclined columnar basalt formations where blocks rotate forward due to gravity and insufficient lateral support.
49
In the Hoek-Brown failure criterion, which parameter is NOT required?
Discuss
Answer & Solution
Answer: Option B
Solution:
Joint orientation is not directly used in the Hoek-Brown criterion, which is an empirical model using UCS, GSI, and mi to estimate rock mass strength.
50
What is the effect of increasing joint spacing on rock mass strength?
Discuss
Answer & Solution
Answer: Option A
Solution:
Greater joint spacing results in a more massive rock mass, which increases overall strength and stability of the formation.