0%
Question 1: What does GIS stand for?
A) Geographic Interpretation System
B) Geographic Information System
C) Geometric Information System
D) Global Information Survey
Explanation: GIS stands for Geographic Information System, used for mapping and analyzing spatial data.
Question 2: Which satellite series is used for remote sensing in India?
A) INSAT
B) IRS
C) GSAT
D) EDUSAT
Explanation: IRS (Indian Remote Sensing) satellites are India's primary remote sensing satellites.
Question 3: What does GPS stand for?
A) Global Planning System
B) Global Positioning System
C) Geospatial Position Support
D) General Positioning Satellite
Explanation: GPS is a satellite-based navigation system used globally for positioning.
Question 4: What does DGPS stand for?
A) Differential Global Positioning System
B) Digital GPS
C) Direct GPS
D) Dual GPS
Explanation: DGPS enhances the accuracy of GPS by using correction signals from base stations.
Question 5: Which sensor type works without sunlight?
A) Passive sensor
B) Active sensor
C) Visual sensor
D) Thermal sensor
Explanation: Active sensors like radar emit their own energy and do not depend on sunlight.
Question 6: What is the main function of ETS?
A) Soil testing
B) Land surveying
C) Satellite imaging
D) Water sampling
Explanation: Electronic Total Station (ETS) is mainly used for precise land surveying.
Question 7: Which is NOT a component of GPS?
A) User segment
B) Control segment
C) Space segment
D) Weather segment
Explanation: GPS includes space, control, and user segments. There is no weather segment.
Question 8: Which remote sensing resolution defines the smallest object detected?
A) Spatial resolution
B) Spectral resolution
C) Radiometric resolution
D) Temporal resolution
Explanation: Spatial resolution determines the smallest visible feature in imagery.
Question 9: What is GNSS?
A) Geographic Network for Soil Studies
B) Global Navigation Satellite System
C) Global Natural Surveying System
D) Geo Navigation Spatial System
Explanation: GNSS is the umbrella term for satellite navigation systems like GPS, GLONASS, etc.
Question 10: Which country developed the GLONASS navigation system?
A) Russia
B) China
C) USA
D) India
Explanation: GLONASS is Russia's global satellite navigation system.
Question 11: Which of the following is a passive sensor?
A) Camera
B) Radar
C) LiDAR
D) Sonar
Explanation: Passive sensors like cameras rely on ambient light, unlike active sensors like radar or LiDAR.
Question 12: Which unit is used to measure spatial resolution?
A) Degrees
B) Bits
C) Meters
D) Seconds
Explanation: Spatial resolution is usually measured in meters, indicating the size of the smallest detectable object.
Question 13: Which frequency band is commonly used in microwave remote sensing?
A) UV band
B) X-ray band
C) L-band
D) Audio band
Explanation: L-band (1–2 GHz) is widely used in microwave remote sensing like radar imaging.
Question 14: What does ETS stand for in surveying?
A) Electronic Total Station
B) Electronic Transfer System
C) Enhanced Tracking System
D) Earth Tracking System
Explanation: ETS stands for Electronic Total Station, a modern surveying instrument.
Question 15: Which is a major application of remote sensing?
A) Email communication
B) Land use and land cover mapping
C) Online shopping
D) Instant messaging
Explanation: Remote sensing is widely used for land use/land cover classification and analysis.
Question 16: What is the primary benefit of DGPS over GPS?
A) Higher positional accuracy
B) More satellites
C) Fewer calculations
D) Lower cost
Explanation: DGPS provides higher accuracy by correcting GPS errors using base station data.
Question 17: What does LiDAR measure?
A) Magnetic fields
B) Distance using laser pulses
C) Radio signals
D) Humidity
Explanation: LiDAR uses laser pulses to measure distances and create detailed 3D maps.
Question 18: What is 'georeferencing' in GIS?
A) Aligning spatial data to map coordinates
B) Encrypting maps
C) Digitizing paper maps
D) Merging datasets
Explanation: Georeferencing is the process of aligning spatial data to known geographic coordinates.
Question 19: What does a Total Station measure?
A) Soil type
B) Distance, angles, and coordinates
C) Air pressure
D) Electricity flow
Explanation: A Total Station combines electronic distance measurement and angular measurement for surveying.
Question 20: What is spectral resolution?
A) Ability to distinguish between wavelengths
B) Ability to detect motion
C) Number of satellites used
D) GPS signal strength
Explanation: Spectral resolution is the ability of a sensor to define fine wavelength intervals.
Question 21: What is the function of a base station in DGPS?
A) Provides correction data for GPS signals
B) Captures satellite images
C) Stores GIS layers
D) Tracks wildlife movement
Explanation: Base stations in DGPS transmit error corrections to improve GPS accuracy.
Question 22: Which of these is an example of a vector GIS data model?
A) Points, lines, polygons
B) Pixels
C) Grid cells
D) Bands
Explanation: Vector data uses geometric shapes like points, lines, and polygons to represent features.
Question 23: Which Indian navigation system is operational regionally?
A) GPS
B) GLONASS
C) IRNSS
D) GALILEO
Explanation: IRNSS (also called NavIC) is India’s regional navigation satellite system.
Question 24: In GPS, how many satellites are needed for accurate 3D positioning?
A) 2
B) 3
C) 4
D) 5
Explanation: At least 4 GPS satellites are required to calculate a 3D position (latitude, longitude, altitude).
Question 25: DGPS improves the accuracy of GPS by using:
A) Ground-based reference stations
B) Space telescopes
C) Deep space satellites
D) Mobile towers
Explanation: DGPS (Differential GPS) uses ground-based reference stations to correct GPS errors and improve accuracy.
Report Card
Total Questions Attempted: 0
Correct Answers: 0
Wrong Answers: 0
Percentage of Correct Answers: 0%
--
