Lidar and Radar MCQs December 22, 2025August 10, 2024 by u930973931_answers 40 min Score: 0 Attempted: 0/40 Subscribe 1. What does Lidar stand for? (A) Laser Detection and Ranging (B) Laser Imaging and Detection (C) Light Imaging and Ranging (D) Light Detection and Ranging 2. What is the primary principle behind Lidar technology? (A) Measuring changes in sound waves (B) Measuring changes in electromagnetic waves (C) Measuring changes in radio waves (D) Measuring changes in light waves 3. In Radar technology, what does âRadarâ stand for? (A) Radio Direction and Ranging (B) Radio Detection and Ranging (C) Radar Detection and Ranging (D) Radio Detection and Reflection 4. Which type of wave is used by Lidar for distance measurement? (A) Light waves (B) Microwaves (C) Sound waves (D) Radio waves 5. Which type of wave is used by Radar for distance measurement? (A) Sound waves (B) Radio waves (C) Light waves (D) Microwaves 6. What does a Lidar system measure to determine distance? (A) The time delay of reflected radio waves (B) The time delay of reflected sound waves (C) The time delay of reflected light pulses (D) The frequency shift of reflected light waves 7. What is the typical application of Radar in aviation? (A) Terrain mapping (B) Object recognition (C) Speed measurement (D) Weather monitoring 8. What is the typical application of Lidar in autonomous vehicles? (A) Terrain mapping (B) Weather monitoring (C) Object recognition (D) Speed measurement 9. Which Lidar technology is commonly used for high-resolution mapping? (A) Time-of-Flight Lidar (B) Phase-Shift Lidar (C) Frequency Modulated Continuous Wave (FMCW) Lidar (D) Doppler Lidar 10. Which Radar technology is often used for tracking moving objects? (A) Doppler Radar (B) Continuous Wave Radar (C) Frequency Modulated Continuous Wave (FMCW) Radar (D) Pulse Radar 11. Which of the following can Lidar systems accurately measure? (A) Distance to objects (B) Speed of objects (C) Radio frequency interference (D) Atmospheric pressure 12. What is the primary benefit of using Lidar over Radar in mapping applications? (A) Greater range (B) Better weather penetration (C) Higher resolution (D) Lower cost 13. Which Radar system is used for speed enforcement in law enforcement? (A) Pulse Radar (B) Continuous Wave Radar (C) Frequency Modulated Continuous Wave (FMCW) Radar (D) Doppler Radar 14. In Lidar technology, what is âpoint cloudâ? (A) A measurement of atmospheric conditions (B) A type of light wave used for scanning (C) A radar reflection pattern (D) A collection of data points representing the scanned surface 15. Which type of Lidar is used for measuring atmospheric properties? (A) Time-of-Flight Lidar (B) Ground-Based Lidar (C) Differential Absorption Lidar (DIAL) (D) Airborne Lidar 16. In Radar systems, what does the term âDoppler shiftâ refer to? (A) Change in the wavelength of the transmitted signal (B) Change in the amplitude of the reflected signal due to the objectâs distance (C) Change in the frequency of the reflected signal due to the motion of the object (D) Change in the phase of the transmitted signal 17. Which type of Radar is used for weather observation? (A) Doppler Radar (B) Pulse Radar (C) Continuous Wave Radar (D) Frequency Modulated Continuous Wave (FMCW) Radar 18. Which Lidar system is used for detecting objects in a cluttered environment? (A) Time-of-Flight Lidar (B) Phase-Shift Lidar (C) Frequency Modulated Continuous Wave (FMCW) Lidar (D) Multibeam Lidar 19. What is the typical wavelength range for Lidar systems? (A) Micrometers to millimeters (B) Nanometers to micrometers (C) Millimeters to centimeters (D) Centimeters to meters 20. Which component is essential for a Radar system to generate radio waves? (A) Photodetector (B) Laser (C) Antenna (D) Gyroscope 21. What does a âRadar cross sectionâ measure? (A) The distance to the target (B) The area of the target that reflects radar waves (C) The speed of the target (D) The angle of the target relative to the radar 22. What is the main difference between active and passive Lidar systems? (A) Active Lidar systems transmit their own light, while passive systems rely on external light sources (B) Passive Lidar systems transmit their own light, while active systems rely on external light sources (C) Active systems use radio waves, while passive systems use light waves (D) Active systems use sound waves, while passive systems use light waves 23. Which Lidar application is commonly used for floodplain mapping? (A) Spaceborne Lidar (B) Ground-Based Lidar (C) Airborne Lidar (D) Differential Absorption Lidar (DIAL) 24. What type of data does Radar provide for collision avoidance systems? (A) Object shape and texture (B) Object distance, speed, and angle (C) Object color and material composition (D) Atmospheric conditions and temperature 25. Which Lidar technology is used for underwater mapping? (A) Airborne Lidar (B) Bathymetric Lidar (C) Ground-Based Lidar (D) Differential Absorption Lidar (DIAL) 26. Which feature of Lidar systems allows for high-density data collection? (A) Antenna beamwidth (B) Radar pulse width (C) Laser pulse frequency (D) Radio wave wavelength 27. What does ârange resolutionâ refer to in Radar systems? (A) The ability to distinguish between two objects that are close to each other in distance (B) The maximum distance that Radar can measure (C) The ability to detect objects at different speeds (D) The ability to measure the angle of incidence 28. Which of the following can Lidar systems not directly measure? (A) Distance to a target (B) Surface elevation (C) Speed of a target (D) Vegetation density 29. What is the primary purpose of âfrequency modulationâ in Lidar systems? (A) To measure the wavelength of the transmitted light (B) To measure the Doppler shift of the returned signal (C) To detect changes in atmospheric conditions (D) To enhance resolution by varying the light frequency 30. Which type of Lidar is best suited for measuring atmospheric aerosols? (A) Time-of-Flight Lidar (B) Airborne Lidar (C) Bathymetric Lidar (D) Differential Absorption Lidar (DIAL) 31. In Radar systems, what is the purpose of a âpulseâ in pulse-Doppler Radar? (A) To measure the time delay of the reflected signal (B) To generate a continuous signal (C) To provide a high-resolution measurement of the targetâs velocity (D) To measure the amplitude of the reflected signal 32. What is the primary challenge when using Lidar in low-visibility conditions? (A) Inaccurate distance measurements (B) Interference from atmospheric particles (C) Reduced light reflection from surfaces (D) Limited wavelength range 33. Which Radar technology is used for detecting weather phenomena such as rain or snow? (A) Pulse Radar (B) Doppler Radar (C) Continuous Wave Radar (D) Frequency Modulated Continuous Wave (FMCW) Radar 34. Which type of Lidar is typically used for mapping large geographical areas? (A) Airborne Lidar (B) Ground-Based Lidar (C) Bathymetric Lidar (D) Spaceborne Lidar 35. What type of Radar is used to detect aircraft in the vicinity of airports? (A) Continuous Wave Radar (B) Pulse Radar (C) Doppler Radar (D) Frequency Modulated Continuous Wave (FMCW) Radar 36. What is the primary advantage of using Frequency Modulated Continuous Wave (FMCW) Lidar? (A) Ability to penetrate through fog and rain (B) High resolution and accuracy in distance measurements (C) Low cost and simplicity of design (D) High speed of data acquisition 37. In which application would you most likely use a Multibeam Lidar system? (A) Detecting weather phenomena (B) Measuring atmospheric properties (C) Mapping underwater terrains (D) Detailed topographical mapping 38. Which of the following is a limitation of Radar technology? (A) Inability to detect objects at long distances (B) Difficulty in measuring speed (C) Limited resolution compared to Lidar (D) High susceptibility to interference from light conditions 39. What is the main advantage of Lidar over traditional surveying methods? (A) No need for specialized training (B) Lower cost of equipment (C) Simplicity in data analysis (D) Ability to capture high-density 3D data quickly 40. Which Radar system is most suitable for maritime navigation? (A) Pulse Radar (B) Continuous Wave Radar (C) Frequency Modulated Continuous Wave (FMCW) Radar (D) Doppler Radar