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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-4 section-1

31
Which term describes the downward and outward movement of slope-forming materials?
Discuss
Answer & Solution
Answer: Option C
Solution:
A landslide is the downward movement of rock, soil, and debris under the influence of gravity.It is a major geological hazard affecting hilly and mountainous areas.
32
Liquefaction is a phenomenon where:
Discuss
Answer & Solution
Answer: Option B
Solution:
Liquefaction occurs when saturated, loosely packed soil loses its strength due to sudden loading, such as from an earthquake.It can cause buildings to sink or tilt.
33
Sinkholes are commonly formed in areas underlain by:
Discuss
Answer & Solution
Answer: Option B
Solution:
Limestone areas are susceptible to sinkholes due to the dissolution of carbonate rocks by acidic groundwater, a process known as karstification.
34
The Richter scale measures:
Discuss
Answer & Solution
Answer: Option D
Solution:
The Richter scale quantifies the energy released during an earthquake.It is logarithmic, meaning each increase of 1 represents 10 times more amplitude.
35
Which of the following is a secondary hazard resulting from volcanic activity?
Discuss
Answer & Solution
Answer: Option D
Solution:
A lahar is a destructive volcanic mudflow composed of water and volcanic debris.It often follows volcanic eruptions and heavy rain.
36
The focus of an earthquake is defined as:
Discuss
Answer & Solution
Answer: Option B
Solution:
The focus is the point within the Earth where an earthquake originates due to sudden energy release.The point above it on the surface is called the epicenter.
37
A landslide triggered by an earthquake is known as a:
Discuss
Answer & Solution
Answer: Option C
Solution:
A seismic landslide is a mass movement triggered by ground shaking during an earthquake.These are especially dangerous in mountainous terrain.
38
Which region of India is most prone to earthquakes?
Discuss
Answer & Solution
Answer: Option C
Solution:
Uttarakhand, located in the Himalayan belt, lies in a seismically active zone (Zone V), making it highly earthquake-prone.
39
The primary cause of subsidence in urban areas is:
Discuss
Answer & Solution
Answer: Option B
Solution:
Subsidence is the sinking of the ground, often caused by groundwater extraction or mining, leading to collapse of underlying layers.
40
Which geological hazard is responsible for mass destruction in coastal areas after undersea earthquakes?
Discuss
Answer & Solution
Answer: Option C
Solution:
Tsunamis are large ocean waves generated by undersea earthquakes or landslides.They travel at high speeds and cause major coastal destruction.