Remote Sensing and GIS in Geological Engineering MCQs Questions & Answers

1

What is the primary principle behind remote sensing?

A) Collecting data by direct contact B) Observing Earth from a distance using sensors C) Drilling to collect soil samples D) Using underground radar

Discuss

Answer & Solution

Answer: Option B

Solution:

Remote sensing is the process of collecting information about the Earth's surface without physical contact, typically through satellites or aircraft sensors.

2

Which of the following is an active remote sensing technique?

A) Aerial photography B) LiDAR (Light Detection and Ranging) C) Thermal infrared imaging D) Multispectral scanning

Discuss

Answer & Solution

Answer: Option B

Solution:

Active remote sensing involves emitting signals and detecting their reflections. LiDAR emits laser pulses to map surfaces.

3

Which GIS component is responsible for spatial data analysis?

A) Hardware B) Software C) Data D) People

Discuss

Answer & Solution

Answer: Option B

Solution:

GIS software processes and analyzes spatial data, allowing geological interpretations and decision making.

4

In remote sensing, what does spectral resolution refer to?

A) Size of the area covered B) Ability to distinguish between different wavelengths C) Number of pixels in the image D) Time between image acquisitions

Discuss

Answer & Solution

Answer: Option B

Solution:

Spectral resolution defines how well a sensor can distinguish different wavelengths or bands in the electromagnetic spectrum.

5

What type of GIS data represents features like rivers and roads?

A) Raster data B) Vector data C) Text data D) Tabular data

Discuss

Answer & Solution

Answer: Option B

Solution:

Vector data represents discrete features such as points, lines, and polygons (e.g., rivers, roads).

6

Which satellite sensor provides multispectral images useful for geological mapping?

A) MODIS B) Landsat C) GPS D) RADAR

Discuss

Answer & Solution

Answer: Option B

Solution:

Landsat

7

What is the term for the geometric correction process in remote sensing?

A) Radiometric correction B) Atmospheric correction C) Georeferencing D) Image classification

Discuss

Answer & Solution

Answer: Option C

Solution:

Georeferencing aligns the remote sensing image to a known coordinate system for accurate mapping.

8

Which GIS operation combines spatial data layers to analyze relationships?

A) Buffering B) Overlay C) Digitizing D) Geocoding

Discuss

Answer & Solution

Answer: Option B

Solution:

Overlay combines multiple layers to identify spatial relationships, essential in geological studies.

9

In remote sensing, the Normalized Difference Vegetation Index (NDVI) is used to assess:

A) Soil moisture content B) Vegetation health and density C) Rock type D) Surface temperature

Discuss

Answer & Solution

Answer: Option B

Solution:

NDVI measures vegetation vigor using the difference between near-infrared and red light reflectance.

10

Which of the following is a limitation of satellite remote sensing?

A) Large area coverage B) High cost and cloud cover interference C) Repetitive data acquisition D) Ability to detect spectral signatures

Discuss

Answer & Solution

Answer: Option B

Solution:

Cloud cover can obscure satellite images, and costs can be high for certain sensors.

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