Satellite Communication MCQs

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1. Which of the following orbits is commonly used for geostationary satellites?
(A) Polar orbit
(B) Low Earth Orbit (LEO)
(C) Medium Earth Orbit (MEO)
(D) Geostationary Orbit (GEO)

2. What is the approximate altitude of a geostationary satellite orbit?
(A) 200 km
(B) 1000 km
(C) 35,786 km
(D) 5000 km

3. Satellite phones typically use satellites in which orbit for communication?
(A) Geostationary Orbit (GEO)
(B) Medium Earth Orbit (MEO)
(C) Low Earth Orbit (LEO)
(D) Highly Elliptical Orbit (HEO)

4. Which of the following is a key advantage of using geostationary satellites for communication?
(A) Low latency
(B) High data rates
(C) Long coverage duration over a specific area
(D) Global coverage

5. What is the typical round-trip signal delay for geostationary satellite communication?
(A) Less than 10 milliseconds
(B) 1 minute
(C) 5 to 10 seconds
(D) 500 milliseconds to 1 second

6. Which of the following modulation techniques is commonly used in satellite communication for efficient use of bandwidth?
(A) AM (Amplitude Modulation)
(B) FM (Frequency Modulation)
(C) QPSK (Quadrature Phase Shift Keying)
(D) PCM (Pulse Code Modulation)

7. What is the name given to the phenomenon where the signal strength of a satellite decreases significantly as the satellite moves towards the horizon from the observer’s point of view?
(A) Rain fade
(B) Satellite eclipse
(C) Signal attenuation
(D) Doppler shift

8. Which organization allocates frequency bands for satellite communication?
(A) ITU (International Telecommunication Union)
(B) IEEE (Institute of Electrical and Electronics Engineers)
(C) IETF (Internet Engineering Task Force)
(D) FCC (Federal Communications Commission)

9. What is the term for the process of adjusting the orientation of a satellite to ensure its antennas point accurately towards Earth?
(A) Orbital adjustment
(B) Attitude control
(C) Propulsion alignment
(D) Signal alignment

10. Which of the following is a typical application of satellite communication?
(A) Global Positioning System (GPS)
(B) Local Area Network (LAN)
(C) Bluetooth
(D) Infrared communication

11. Which of the following is NOT a type of satellite communication service?
(A) Satellite Imaging Service (SIS)
(B) Mobile Satellite Service (MSS)
(C) Satellite Broadcasting Service (SBS)
(D) Fixed Satellite Service (FSS)

12. What is the term for the process of combining multiple carriers into a single transmission path in satellite communication?
(A) Multiplexing
(B) Modulation
(C) Encoding
(D) Demodulation

13. Which of the following satellite constellations is known for its use in global navigation systems like GPS?
(A) Geostationary satellites
(B) Medium Earth Orbit (MEO) satellites
(C) Low Earth Orbit (LEO) satellites
(D) Highly Elliptical Orbit (HEO) satellites

14. Which of the following is a major challenge faced by satellite communication systems operating in Low Earth Orbit (LEO)?
(A) Limited coverage area
(B) High latency
(C) High cost
(D) Interference from ground stations

15. What is the name of the phenomenon where precipitation affects signal transmission in satellite communication?
(A) Signal attenuation
(B) Doppler shift
(C) Signal interference
(D) Rain fade

16. Which organization regulates the licensing and operation of satellite systems in the United States?
(A) FCC (Federal Communications Commission)
(B) ITU (International Telecommunication Union)
(C) IEEE (Institute of Electrical and Electronics Engineers)
(D) ESA (European Space Agency)

17. Which of the following is NOT a benefit of satellite communication?
(A) Wide coverage area
(B) Low initial setup cost
(C) High data transmission speeds
(D) Reliable communication in remote areas

18. Which satellite communication band is commonly used for satellite television broadcasting?
(A) L-band
(B) C-band
(C) S-band
(D) VHF band

19. Which type of satellite communication system is designed to relay signals between ground stations and mobile terminals, such as aircraft and ships?
(A) Mobile Satellite Service (MSS)
(B) Fixed Satellite Service (FSS)
(C) Direct Broadcast Satellite (DBS)
(D) Satellite Digital Audio Radio Service (SDARS)

20. Which of the following is a disadvantage of geostationary satellites compared to Low Earth Orbit (LEO) satellites?
(A) Higher latency
(B) Limited coverage area
(C) Shorter orbital lifetime
(D) Higher operational cost

21. What is the term for the time taken for a satellite to complete one full orbit around the Earth?
(A) Signal modulation
(B) Attitude control
(C) Propagation delay
(D) Orbital period

22. Which of the following is a key characteristic of a MEO satellite orbit?
(A) Altitude around 35,786 km
(B) Altitude less than 2000 km
(C) Non-elliptical orbit
(D) Geostationary position

23. In satellite communication, what is the term for the process of transferring control of a mobile satellite from one ground station to another?
(A) Encoding
(B) Multiplexing
(C) Modulation
(D) Handover

24. Which type of modulation is commonly used in digital satellite television broadcasting?
(A) Amplitude Modulation (AM)
(B) Quadrature Amplitude Modulation (QAM)
(C) Phase Shift Keying (PSK)
(D) Frequency Modulation (FM)

25. Which satellite communication band is often used for military and government communications due to its resistance to weather effects?
(A) Ku-band
(B) Ka-band
(C) VHF/UHF band
(D) X-band

26. What is the term for the process of adjusting the frequency of a signal due to relative motion between satellite and ground station?
(A) Rain fade
(B) Propagation delay
(C) Signal attenuation
(D) Doppler shift

27. Which organization plays a key role in coordinating global satellite orbital slots to avoid interference?
(A) FCC (Federal Communications Commission)
(B) IEEE (Institute of Electrical and Electronics Engineers)
(C) ITU (International Telecommunication Union)
(D) NASA (National Aeronautics and Space Administration)

28. Which satellite communication application involves the transmission of data from Earth observation satellites?
(A) Satellite navigation
(B) Remote sensing
(C) Satellite radio broadcasting
(D) Satellite internet

29. Which of the following is a characteristic of a Highly Elliptical Orbit (HEO) satellite?
(A) Orbital period less than 2 hours
(B) Highly eccentric orbit
(C) Altitude similar to geostationary satellites
(D) Stable position above the equator

30. Which of the following is a primary consideration when selecting a frequency band for satellite communication?
(A) Availability of satellite hardware
(B) Atmospheric absorption characteristics
(C) Satellite altitude
(D) Satellite manufacturer recommendations

31. Which satellite communication band is commonly used for satellite phone services?
(A) Ka-band
(B) C-band
(C) Ku-band
(D) L-band

32. Which organization is responsible for managing the Global Positioning System (GPS) satellite constellation?
(A) United States Department of Defense
(B) NASA (National Aeronautics and Space Administration)
(C) FCC (Federal Communications Commission)
(D) ITU (International Telecommunication Union)

33. What is the main advantage of using Low Earth Orbit (LEO) satellites for internet service?
(A) Higher data rates than geostationary satellites
(B) Greater coverage area than geostationary satellites
(C) Lower cost of deployment
(D) Lower latency compared to geostationary satellites

34. Which satellite service is typically used for broadcasting television directly to households?
(A) Fixed Satellite Service (FSS)
(B) Mobile Satellite Service (MSS)
(C) Satellite Digital Audio Radio Service (SDARS)
(D) Direct Broadcast Satellite (DBS)

35. In satellite communication, what is meant by the term “footprint”?
(A) The area on Earth covered by the satellite signal
(B) The weight of the satellite
(C) The satellite’s power consumption
(D) The satellite’s launch vehicle

36. Which of the following factors primarily affects the link budget of a satellite communication system?
(A) Transmit power
(B) Satellite altitude
(C) Launch date
(D) Manufacturing country

37. Which of the following is NOT a typical use of C-band frequencies in satellite communication?
(A) Satellite television broadcasting
(B) Military communication
(C) High-frequency trading
(D) Weather satellite data

38. Which type of orbit is used by communication satellites that need to cover high-latitude regions?
(A) Geostationary orbit
(B) Low Earth Orbit (LEO)
(C) Polar orbit
(D) Medium Earth Orbit (MEO)

39. Which of the following is a method to reduce signal interference in satellite communication?
(A) Employing spread spectrum techniques
(B) Using higher frequency bands
(C) Increasing satellite altitude
(D) Lowering transmission power

Satellite Communication MCQs

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