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Remote Sensing and GIS in Geological Engineering MCQs Questions & Answers | Geological Engineering

Learn and practice multiple-choice questions (MCQs) with answers related to Remote Sensing and GIS in Geological Engineering. These resources are available for Geological engineering students who wish to clear GATE exams, technical interviews, competitive examinations, and other entrance exams. The Remote Sensing and GIS in Geological Engineering chapter is particularly important for students studying Geological engineering. Page-8 section-1

71
What is the main advantage of Synthetic Aperture Radar (SAR) in remote sensing?
Discuss
Answer & Solution
Answer: Option B
Solution:
SAR can penetrate clouds and operate day and night, unlike optical sensors.This makes it invaluable for monitoring in cloudy or dark conditions.
72
What is the primary use of the GIS operation called 'clip'?
Discuss
Answer & Solution
Answer: Option B
Solution:
Clip extracts a specific area of interest from a larger dataset based on a defined boundary.It helps focus analysis on relevant regions.
73
Which of these is NOT typically obtained from remote sensing data?
Discuss
Answer & Solution
Answer: Option C
Solution:
Water table depth is not directly measurable via remote sensing.It requires field measurements or modeling integrating multiple data types.
74
What is the role of image classification in remote sensing?
Discuss
Answer & Solution
Answer: Option B
Solution:
Image classification groups pixels with similar spectral characteristics into categories like forest, water, or urban.This simplifies interpretation and analysis.
75
Which of the following is a disadvantage of raster data in GIS?
Discuss
Answer & Solution
Answer: Option A
Solution:
Raster datasets often require significant storage due to high pixel counts.However, they excel at representing continuous data and support overlay operations.
76
What type of remote sensing uses the visible, near-infrared, and shortwave infrared spectrum?
Discuss
Answer & Solution
Answer: Option B
Solution:
Optical remote sensing utilizes visible, near-infrared, and shortwave infrared bands to capture reflected sunlight from Earth's surface.This data is used for mapping land cover, vegetation, and geology.
77
What is the function of a Digital Elevation Model (DEM) in GIS?
Discuss
Answer & Solution
Answer: Option B
Solution:
A DEM represents the Earth's surface elevations digitally.It is essential for terrain analysis, slope stability, watershed delineation, and construction planning.
78
Which satellite system is primarily used for global land surface observations?
Discuss
Answer & Solution
Answer: Option D
Solution:
MODIS onboard Terra and Aqua satellites provides frequent global observations of land, ocean, and atmosphere.It is widely used for environmental and geological studies.
79
In GIS, what is the purpose of 'buffer analysis'?
Discuss
Answer & Solution
Answer: Option A
Solution:
Buffer analysis creates zones around spatial features.This helps assess impact areas, proximity analysis, and environmental planning.
80
Which remote sensing technique is useful for detecting landslides and surface deformation?
Discuss
Answer & Solution
Answer: Option B
Solution:
SAR Interferometry (InSAR) measures ground deformation by comparing radar images over time.It is highly effective for landslide monitoring and earthquake displacement.