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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-7 section-1

61
What is the primary purpose of the Normalized Difference Vegetation Index (NDVI)?
Discuss
Answer & Solution
Answer: Option B
Solution:
NDVI is an index derived from red and near-infrared bands that indicates vegetation vigor and health.It is widely used in agriculture and environmental monitoring.
62
Which remote sensing platform provides the highest spatial resolution images?
Discuss
Answer & Solution
Answer: Option B
Solution:
UAVs or drones can fly at low altitudes providing very high spatial resolution images.They are increasingly used for detailed site investigations.
63
In GIS, what does 'topology' refer to?
Discuss
Answer & Solution
Answer: Option B
Solution:
Topology describes spatial relationships like adjacency, connectivity, and containment.This is critical for spatial analysis and network modeling.
64
Which satellite sensor is known for providing thermal infrared data?
Discuss
Answer & Solution
Answer: Option D
Solution:
NOAA AVHRR and other sensors capture thermal infrared bands useful for temperature and heat mapping.This data helps in geothermal studies and urban heat island detection.
65
What is the role of the Global Positioning System (GPS) in geological engineering?
Discuss
Answer & Solution
Answer: Option B
Solution:
GPS provides accurate positional data essential for mapping, surveying, and navigation in geological projects.It aids in ground control and spatial data collection.
66
What does the term 'spectral signature' mean in remote sensing?
Discuss
Answer & Solution
Answer: Option B
Solution:
Spectral signature is the specific way different materials reflect or emit electromagnetic radiation across wavelengths.This helps identify and classify surface materials.
67
Which GIS analysis technique is used to predict groundwater recharge zones?
Discuss
Answer & Solution
Answer: Option A
Solution:
Overlay analysis combines multiple thematic layers like soil type, slope, and rainfall to identify recharge zones.This integrated approach is key for water resource management.
68
Which remote sensing method is effective for mapping subsurface geological features?
Discuss
Answer & Solution
Answer: Option B
Solution:
GPR uses radar pulses to image shallow subsurface structures.It is valuable for detecting faults, cavities, and buried objects.
69
What is the spatial resolution of a satellite image?
Discuss
Answer & Solution
Answer: Option A
Solution:
Spatial resolution is the ground area represented by one pixel.Higher resolution means finer detail.
70
Which GIS data format is best for representing continuous phenomena like temperature or elevation?
Discuss
Answer & Solution
Answer: Option B
Solution:
Raster data represents continuous data using grid cells, making it ideal for phenomena varying gradually over space.Examples include DEMs and temperature maps.