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Geological Hazards MCQs Questions & Answers | Geological Engineering

Learn and practice multiple-choice questions (MCQs) with answers related to Geological Hazards. These resources are available for Geological engineering students who wish to clear GATE exams, technical interviews, competitive examinations, and other entrance exams. The Geological Hazards chapter is particularly important for students studying Geological engineering. Page-6 section-1

51
Which hazard is characterized by the slow, downward progression of rock and soil on a slope?
Discuss
Answer & Solution
Answer: Option D
Solution:
Creep is the slowest form of mass movement.It affects surface layers and is usually imperceptible over short periods.
52
A tectonic plate boundary where plates slide past each other is known as a:
Discuss
Answer & Solution
Answer: Option B
Solution:
Transform boundary is where tectonic plates slide horizontally past each other, often causing earthquakes.The San Andreas Fault is a well-known example.
53
Which volcanic hazard involves the ejection of large volcanic bombs?
Discuss
Answer & Solution
Answer: Option C
Solution:
Tephra fall includes all fragments ejected during an eruption, including ash, lapilli, and volcanic bombs.It can cause damage over large distances from the volcano.
54
The point on Earth's surface directly above the earthquake origin is called the:
Discuss
Answer & Solution
Answer: Option C
Solution:
Epicenter is the point on the Earth's surface located directly above the focus (hypocenter) where the earthquake originates.
55
Which of the following increases landslide risk in hilly terrain?
Discuss
Answer & Solution
Answer: Option C
Solution:
Deforestation removes root structures that stabilize the soil, increasing landslide susceptibility especially on steep slopes.
56
What type of landslide is most likely to occur in clay-rich soils during rainfall?
Discuss
Answer & Solution
Answer: Option C
Solution:
Rotational slides commonly occur in saturated clayey slopes where curved failure surfaces develop due to loss of cohesion.
57
Which method is a non-structural approach to mitigate geological hazards?
Discuss
Answer & Solution
Answer: Option B
Solution:
Vegetation planting is a non-structural mitigation method.It stabilizes soil and slopes naturally by reducing erosion and runoff.
58
The Mercalli Intensity Scale measures:
Discuss
Answer & Solution
Answer: Option C
Solution:
Mercalli Intensity Scale measures the observed effects and damage caused by an earthquake on people and structures.
59
Which gas released by volcanoes can be hazardous to life?
Discuss
Answer & Solution
Answer: Option B
Solution:
Carbon dioxide is a common volcanic gas that can displace oxygen and cause asphyxiation in low-lying areas.
60
What is the main cause of tsunamis?
Discuss
Answer & Solution
Answer: Option C
Solution:
Underwater earthquakes, particularly those at subduction zones, cause sudden displacement of the seafloor, generating tsunamis.