Satellites and Services : MCQs
11. Which of the following navigation satellite systems is operated by the United States government?
A. Beidou
B. Galileo
C. Glonass
D. GPS
Answer: D. GPS (Global Positioning System) is operated by the United States government. Explanation: GPS is a constellation of satellites that provides location, navigation, and timing information to users worldwide.
12. Which of the following navigation satellite systems is operated by the European Union?
A. Beidou
B. Galileo
C. Glonass
D. GPS
Answer: B. Galileo is operated by the European Union.
Explanation: Galileo is Europe's own global navigation satellite system, providing positioning, navigation, and timing services to users around the world.
13. How many satellites are needed to provide global coverage for a navigation satellite system like GPS or Galileo?
A. 3
B. 6
C. 12
D. 24
Answer: D. 24 satellites are needed to provide global coverage for a navigation satellite system such as GPS or Galileo.
Explanation: A minimum of 24 satellites is required for a navigation satellite system to provide global coverage, with additional satellites used to increase accuracy and reliability.
14. What is the name of the Chinese navigation satellite system?
A. Beidou
B. Galileo
C. Glonass
D. GPS
Answer: A. Beidou is the name of the Chinese navigation satellite system.
Explanation: Beidou is China's global navigation satellite system, providing positioning, navigation, and timing services to users in China and around the world.
15. Which of the following navigation satellite systems was the first to be developed?
A. Beidou
B. Galileo
C. Glonass
D. GPS
Answer: C. Glonass was the first navigation satellite system to be developed.
Explanation: Glonass was developed by the Soviet Union in the 1970s and was the first operational navigation satellite system.
16. Which of the following is not an area of scientific research for satellites?
A. Astronomy
B. Meteorology
C. Environmental science
D. Military reconnaissance
Answer: D. Military reconnaissance is not an area of scientific research for satellites.
Explanation: Satellites are used in a variety of scientific research fields, including astronomy, meteorology, and environmental science. They are not typically used for military reconnaissance purposes.
17. Which of the following satellites is used for studying the Earth's climate and environment?
A. Hubble Space Telescope
B. Chandra X-ray Observatory
C. Spitzer Space Telescope
D. Earth Observing System
Answer: D. Earth Observing System is used for studying the Earth's climate and environment.
Explanation: The Earth Observing System (EOS) is a series of satellites launched by NASA for the purpose of studying the Earth's climate and environment. The other options listed are used for astronomy and astrophysics research.
18. What type of research do X-ray telescopes like Chandra primarily focus on?
A. Planetary science
B. Solar science
C. Stellar science
D. Galactic science
Answer: C. Stellar science is the primary focus of X-ray telescopes like Chandra.
Explanation: X-ray telescopes like Chandra are primarily used for studying the high-energy phenomena associated with stellar objects, such as supernovae, black holes, and neutron stars.
19. What type of research is typically conducted using radio telescopes like the Arecibo Observatory?
A. Meteorology
B. Planetary science
C. Environmental science
D. Astronomy
Answer: D. Astronomy is typically conducted using radio telescopes like the Arecibo Observatory.
Explanation: Radio telescopes like the Arecibo Observatory are used to study a wide range of astronomical phenomena, including pulsars, galaxies, and the cosmic microwave background radiation.
20. What type of research is typically conducted using infrared telescopes like the Spitzer Space Telescope?
A. Planetary science
B. Solar science
C. Stellar science
D. Galactic science
Answer: D. Galactic science is typically conducted using infrared telescopes like the Spitzer Space Telescope.
Explanation: Infrared telescopes like Spitzer are used for studying the properties of galaxies, including their formation, evolution, and interactions with other galaxies. They are also used for studying the properties of dust and gas within galaxies.
21. Which of the following is a common application of military and defence satellites?
A. Weather monitoring
B. GPS navigation
C. Intelligence gathering
D. Agriculture monitoring
Answer: C. Intelligence gathering Explanation: Military and defence satellites are primarily used for intelligence gathering, such as reconnaissance and surveillance.
22. Which frequency band is commonly used for military and defence satellite communication?
A. S-band
B. X-band
C. Ku-band
D. Ka-band
Answer: B. X-band Explanation: X-band frequency is commonly used for military and defence satellite communication due to its high bandwidth and resistance to interference.
