Remote Sensing and GIS MCQ

Q1. What is Remote Sensing?

Correct Answer: A

Remote sensing involves collecting information from a distance, typically using satellite or airborne sensors.

Q2. Which type of radiation is commonly used in remote sensing?

Correct Answer: A

Electromagnetic radiation is most used for sensing Earth’s surface.

Q3. What does GIS stand for?

Correct Answer: A

GIS stands for Geographic Information System.

Q4. Which sensor type captures data with many narrow spectral bands?

Correct Answer: A

Hyperspectral sensors capture contiguous narrow spectral bands.

Q5. Resolution that refers to the size of the pixel in remote sensing images is?

Correct Answer: A

Spatial resolution relates to pixel size.

Q6. Temporal resolution in remote sensing indicates?

Correct Answer: A

Temporal resolution is revisit frequency.

Q7. Which platform offers the highest spatial resolution images?

Correct Answer: A

Airborne sensors can capture fine spatial details.

Q8. Which GIS operation overlays multiple thematic maps?

Correct Answer: A

Overlay combines multiple spatial layers.

Q9. What is radiometric resolution in remote sensing?

Correct Answer: A

Radiometric resolution defines sensitivity to energy differences.

Q10. What is the function of a Digital Elevation Model (DEM)?

Correct Answer: A

DEM provides elevation information.

Q11. Which remote sensing technique is best for mapping vegetation health?

Correct Answer: A

NDVI is widely used for vegetation monitoring.

Q12. Which remote sensing sensor operates actively by emitting signals?

Correct Answer: A

Radar transmits and receives signals.

Q13. Which coordinate system is primarily used in GIS?

Correct Answer: A

Geographic coordinate system is commonly used.

Q14. Which term describes the process of correcting satellite images to match true ground positions?

Correct Answer: A

Georeferencing aligns images with spatial references.

Q15. Remote Sensing data is influenced by the atmosphere through?

Correct Answer: A

Atmosphere causes scattering and absorption.

Q16. Which GIS data model uses vector-based points, lines, and polygons?

Correct Answer: A

Vector models represent discrete features.

Q17. DIfference between passive and active remote sensing?

Correct Answer: A

Active sensors emit; passive sensors rely on external illumination.

Q18. Which process converts raw remote sensing data into georeferenced images?

Correct Answer: D

Georectification aligns data to coordinate systems.

Q19. What does the term β€œspatial resolution” refer to in satellite imagery?

Correct Answer: A

Spatial resolution defines smallest distinguishable detail.

Q20. Which sensor resolution affects ability to distinguish objects with similar brightness?

Correct Answer: A

Radiometric resolution governs sensitivity to brightness differences.

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