Remote Sensing and GIS in Geological Engineering MCQs Questions & Answers

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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-5 section-1

What is radiometric resolution in remote sensing?

A) Number of spectral bands recorded B) Ability to distinguish between different temperature levels C) The sensitivity of the sensor to detect slight differences in energy intensity D) Size of the image pixel

Discuss

Answer & Solution

Answer: Option C

Solution:

Radiometric resolution is the sensor�s ability to detect small differences in energy intensity.It affects the detail and quality of the image data.

Which of the following is a passive remote sensing system?

A) Radar B) LiDAR C) Optical satellite sensors D) SONAR

Discuss

Answer & Solution

Answer: Option C

Solution:

Optical satellite sensors are passive as they rely on sunlight reflected from the Earth.Radar and LiDAR are active systems because they emit their own signals.

What does 'spatial interpolation' in GIS do?

A) Assigns geographic coordinates to images B) Predicts values at unsampled locations based on sampled data C) Combines multiple layers D) Digitizes paper maps

Discuss

Answer & Solution

Answer: Option B

Solution:

Spatial interpolation estimates unknown values between sampled points to create continuous surface maps, like elevation or pollution levels.Common methods include Kriging and IDW.

Which of the following remote sensing data types provides the best spectral resolution?

A) Panchromatic images B) Multispectral images C) Hyperspectral images D) Thermal images

Discuss

Answer & Solution

Answer: Option C

Solution:

Hyperspectral images capture hundreds of narrow spectral bands, allowing detailed material identification.This is valuable for precise mineral mapping and vegetation studies.

What is the main purpose of geostatistics in geological engineering?

A) To generate geological maps B) To analyze spatial variability and uncertainty in geological data C) To conduct site investigations D) To measure soil permeability

Discuss

Answer & Solution

Answer: Option B

Solution:

Geostatistics applies statistical methods to spatial data to understand variability and predict values across unsampled locations.It improves the reliability of geological and geotechnical models.

Which sensor is most suitable for mapping vegetation health?

A) Thermal infrared sensor B) Radar sensor C) Multispectral sensor D) SONAR

Discuss

Answer & Solution

Answer: Option C

Solution:

Multispectral sensors capture data in various visible and near-infrared bands.They are widely used for vegetation analysis and monitoring health via indices like NDVI.

What does Digital Elevation Model (DEM) represent in GIS?

A) Land use classification B) Elevation data of terrain surface C) Soil texture distribution D) Water table depth

Discuss

Answer & Solution

Answer: Option B

Solution:

DEM is a digital representation of the ground surface topography.It is fundamental for hydrological modeling, slope analysis, and construction planning.

Which remote sensing technique can penetrate dense vegetation to detect underlying ground features?

A) Optical imaging B) LiDAR C) Thermal imaging D) Multispectral imaging

Discuss

Answer & Solution

Answer: Option B

Solution:

LiDAR uses laser pulses that can penetrate forest canopy and provide detailed ground surface models beneath vegetation.It is widely used in forestry and geological mapping.

What does the term 'georeferencing' mean in GIS?

A) Assigning coordinate system to spatial data B) Collecting satellite images C) Performing data interpolation D) Combining attribute data

Discuss

Answer & Solution

Answer: Option A

Solution:

Georeferencing aligns spatial data to a known coordinate system, enabling overlay with other geospatial datasets.It is essential for accurate mapping and analysis.

Which factor does NOT affect the accuracy of GPS measurements?

A) Satellite geometry B) Atmospheric conditions C) User equipment quality D) Soil pH

Discuss

Answer & Solution

Answer: Option D

Solution:

Soil pH does not influence GPS accuracy.Accuracy depends on satellite position, atmospheric interference, and receiver quality.

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