Environmental Studies ยท Computer Knowledge
Geospatial and Monitoring Technology
1,527 Questions
Geospatial technology involves tools and methods used to map, monitor, and analyze the Earth. This section covers remote sensing, geographic information systems, and environmental monitoring networks. These topics are crucial for civil services and state level examinations.
Remote sensing techniquesGIS applicationsEnvironmental monitoringDigital elevation modelsSatellite communication
Geospatial and Monitoring Technology Questions
Which of the following is a type of geospatial technology?
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Global Positioning System (GPS)
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Remote Sensing
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Geographic Information System (GIS)
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All of the above
D
Correct answer
Explanation
Global Positioning System (GPS), Remote Sensing, and Geographic Information System (GIS) are all types of geospatial technology.
What is the recommended pre-flight inspection procedure for drones?
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Visual inspection only
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Battery check only
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Propeller check only
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All of the above
D
Correct answer
Explanation
Pre-flight inspection should include a visual inspection of the drone, a battery check, and a propeller check.
Which of the following is a major application of Geospatial Technologies in disaster management in India?
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Risk assessment and mapping
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Early warning systems
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Damage assessment and response
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All of the above
D
Correct answer
Explanation
Geospatial Technologies play a crucial role in disaster management by supporting risk assessment, developing early warning systems, and facilitating damage assessment and response efforts.
Which type of sensor is commonly used for capturing high-resolution images of the Earth's surface?
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Radar
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Lidar
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Multispectral
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Thermal
C
Correct answer
Explanation
Multispectral sensors capture images in multiple spectral bands, allowing for detailed analysis of land cover, vegetation, and other surface features.
What is the primary function of a hyperspectral sensor?
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Measuring surface temperature
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Detecting changes in vegetation
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Identifying mineral composition
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Mapping land use patterns
C
Correct answer
Explanation
Hyperspectral sensors collect data in hundreds or thousands of narrow spectral bands, enabling the identification of specific minerals and materials based on their unique spectral signatures.
Which type of sensor is used to measure the elevation and topography of the Earth's surface?
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Radar
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Lidar
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Multispectral
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Thermal
B
Correct answer
Explanation
Lidar (Light Detection and Ranging) sensors emit laser pulses to measure the distance between the sensor and the ground, providing accurate elevation data and 3D representations of the terrain.
What is the main application of thermal sensors in remote sensing?
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Measuring soil moisture
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Detecting forest fires
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Mapping urban heat islands
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Monitoring volcanic activity
C
Correct answer
Explanation
Thermal sensors measure the temperature of the Earth's surface, allowing for the identification of urban heat islands, which are areas with higher temperatures due to human activities.
Which type of sensor is commonly used for weather forecasting and monitoring atmospheric conditions?
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Radar
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Lidar
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Multispectral
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Microwave
D
Correct answer
Explanation
Microwave sensors are used in weather satellites to measure temperature, humidity, and precipitation, providing valuable data for weather forecasting and climate monitoring.
Which type of sensor is commonly used for monitoring ocean currents and sea surface temperature?
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Radar
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Lidar
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Multispectral
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SAR
D
Correct answer
Explanation
SAR (Synthetic Aperture Radar) sensors use radar technology to measure the backscattered energy from the ocean surface, providing information about ocean currents, sea surface temperature, and wave patterns.
What is the main disadvantage of using radar sensors in remote sensing?
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High cost
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Limited spectral range
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Sensitivity to weather conditions
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Low spatial resolution
C
Correct answer
Explanation
Radar sensors are sensitive to weather conditions, such as rain and clouds, which can interfere with the radar signals and affect the quality of the data collected.
Which type of sensor is commonly used for mapping vegetation and agricultural areas?
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Radar
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Lidar
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Multispectral
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Thermal
C
Correct answer
Explanation
Multispectral sensors capture images in multiple spectral bands, allowing for the identification and classification of different types of vegetation and crops based on their unique spectral signatures.
What is the primary application of Lidar sensors in remote sensing?
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Measuring surface temperature
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Detecting changes in vegetation
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Identifying mineral composition
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Creating 3D models of terrain
D
Correct answer
Explanation
Lidar sensors are used to create detailed 3D models of the Earth's surface, providing accurate elevation data and information about landforms, vegetation structure, and urban environments.
Which type of sensor is commonly used for monitoring forest fires and detecting deforestation?
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Radar
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Lidar
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Multispectral
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Thermal
D
Correct answer
Explanation
Thermal sensors measure the temperature of the Earth's surface, allowing for the detection of forest fires and deforestation, as these areas typically exhibit higher temperatures compared to surrounding areas.
Which type of sensor is commonly used for monitoring air quality and detecting pollutants?
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Radar
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Lidar
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Multispectral
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Spectrometer
D
Correct answer
Explanation
Spectrometers measure the intensity of light at different wavelengths, allowing for the identification and quantification of various pollutants in the atmosphere based on their unique spectral signatures.
What is the primary application of microwave sensors in remote sensing?
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Measuring surface temperature
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Detecting changes in vegetation
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Identifying mineral composition
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Monitoring sea surface temperature
D
Correct answer
Explanation
Microwave sensors are used to measure the temperature of the sea surface, providing valuable data for oceanographic studies, climate monitoring, and weather forecasting.