Satellite Communication MCQs

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) Answer: 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 Answer: C) 35,786 km 3. Satellite phones typically use satellites in which orbit for communication? A) Geostationary Orbit (GEO) B) Low Earth Orbit (LEO) C) Medium Earth Orbit (MEO) D) Highly Elliptical Orbit (HEO) Answer: B) Low Earth Orbit (LEO) 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 Answer: C) Long coverage duration over a specific area 5. What is the typical round-trip signal delay for geostationary satellite communication? A) Less than 10 milliseconds B) 500 milliseconds to 1 second C) 5 to 10 seconds D) 1 minute Answer: B) 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) Answer: C) QPSK (Quadrature Phase Shift Keying) 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) Signal attenuation B) Satellite eclipse C) Rain fade D) Doppler shift Answer: A) Signal attenuation 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) Answer: A) ITU (International Telecommunication Union) 9. What is the term for the process of adjusting the orientation of a satellite to ensure its antennas point accurately towards Earth? A) Attitude control B) Orbital adjustment C) Propulsion alignment D) Signal alignment Answer: A) Attitude control 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 Answer: A) Global Positioning System (GPS) 11. Which of the following is NOT a type of satellite communication service? A) Fixed Satellite Service (FSS) B) Mobile Satellite Service (MSS) C) Satellite Broadcasting Service (SBS) D) Satellite Imaging Service (SIS) Answer: D) Satellite Imaging Service (SIS) 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 Answer: A) Multiplexing 13. Which of the following satellite constellations is known for its use in global navigation systems like GPS? A) Geostationary satellites B) Low Earth Orbit (LEO) satellites C) Medium Earth Orbit (MEO) satellites D) Highly Elliptical Orbit (HEO) satellites Answer: C) Medium Earth Orbit (MEO) satellites 14. Which satellite communication band is typically used for weather satellite data transmission? A) L-band B) C-band C) Ku-band D) Ka-band Answer: C) Ku-band 15. Which of the following is a major challenge faced by satellite communication systems operating in Low Earth Orbit (LEO)? A) High latency B) Limited coverage area C) High cost D) Interference from ground stations Answer: B) Limited coverage area 16. What is the name of the phenomenon where precipitation affects signal transmission in satellite communication? A) Signal attenuation B) Doppler shift C) Rain fade D) Signal interference Answer: C) Rain fade 17. Which organization regulates the licensing and operation of satellite systems in the United States? A) ITU (International Telecommunication Union) B) FCC (Federal Communications Commission) C) IEEE (Institute of Electrical and Electronics Engineers) D) ESA (European Space Agency) Answer: B) FCC (Federal Communications Commission) 18. Which of the following is NOT a benefit of satellite communication? A) Wide coverage area B) High data transmission speeds C) Low initial setup cost D) Reliable communication in remote areas Answer: C) Low initial setup cost 19. Which satellite communication band is commonly used for satellite television broadcasting? A) L-band B) S-band C) C-band D) VHF band Answer: C) C-band 20. Which type of satellite communication system is designed to relay signals between ground stations and mobile terminals, such as aircraft and ships? A) Fixed Satellite Service (FSS) B) Mobile Satellite Service (MSS) C) Direct Broadcast Satellite (DBS) D) Satellite Digital Audio Radio Service (SDARS) Answer: B) Mobile Satellite Service (MSS) 21. 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 Answer: A) Higher latency 22. What is the term for the time taken for a satellite to complete one full orbit around the Earth? A) Orbital period B) Attitude control C) Propagation delay D) Signal modulation Answer: A) Orbital period 23. 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 Answer: B) Altitude less than 2000 km 24. In satellite communication, what is the term for the process of transferring control of a mobile satellite from one ground station to another? A) Handover B) Multiplexing C) Modulation D) Encoding Answer: A) Handover 25. Which type of modulation is commonly used in digital satellite television broadcasting? A) Amplitude Modulation (AM) B) Frequency Modulation (FM) C) Phase Shift Keying (PSK) D) Quadrature Amplitude Modulation (QAM) Answer: D) Quadrature Amplitude Modulation (QAM) 26. 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) X-band D) VHF/UHF band Answer: C) X-band 27. What is the term for the process of adjusting the frequency of a signal due to relative motion between satellite and ground station? A) Doppler shift B) Propagation delay C) Signal attenuation D) Rain fade Answer: A) Doppler shift 28. Which organization plays a key role in coordinating global satellite orbital slots to avoid interference? A) ITU (International Telecommunication Union) B) IEEE (Institute of Electrical and Electronics Engineers) C) FCC (Federal Communications Commission) D) NASA (National Aeronautics and Space Administration) Answer: A) ITU (International Telecommunication Union) 29. 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 Answer: B) Remote sensing 30. Which of the following is a characteristic of a Highly Elliptical Orbit (HEO) satellite? A) Orbital period less than 2 hours B) Altitude similar to geostationary satellites C) Highly eccentric orbit D) Stable position above the equator Answer: C) Highly eccentric orbit 31. 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 Answer: B) Atmospheric absorption characteristics 32. Which satellite communication band is commonly used for satellite phone services? A) L-band B) C-band C) Ku-band D) Ka-band Answer: A) L-band 33. Which organization is responsible for managing the Global Positioning System (GPS) satellite constellation? A) ITU (International Telecommunication Union) B) NASA (National Aeronautics and Space Administration) C) FCC (Federal Communications Commission) D) United States Department of Defense Answer: D) United States Department of Defense 34. What is the main advantage of using Low Earth Orbit (LEO) satellites for internet service? A) Lower latency compared to geostationary satellites B) Greater coverage area than geostationary satellites C) Lower cost of deployment D) Higher data rates than geostationary satellites Answer: A) Lower latency compared to geostationary satellites 35. Which satellite service is typically used for broadcasting television directly to households? A) Fixed Satellite Service (FSS) B) Mobile Satellite Service (MSS) C) Direct Broadcast Satellite (DBS) D) Satellite Digital Audio Radio Service (SDARS) Answer: C) Direct Broadcast Satellite (DBS) 36. 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 Answer: A) The area on Earth covered by the satellite signal 37. Which of the following factors primarily affects the link budget of a satellite communication system? A) Satellite altitude B) Transmit power C) Launch date D) Manufacturing country Answer: B) Transmit power 38. Which of the following is NOT a typical use of C-band frequencies in satellite communication? A) Satellite television broadcasting B) Military communication C) Weather satellite data D) High-frequency trading Answer: D) High-frequency trading 39. Which type of orbit is used by communication satellites that need to cover high-latitude regions? A) Geostationary orbit B) Polar orbit C) Low Earth Orbit (LEO) D) Medium Earth Orbit (MEO) Answer: B) Polar orbit 40. Which of the following is a method to reduce signal interference in satellite communication? A) Increasing satellite altitude B) Using higher frequency bands C) Employing spread spectrum techniques D) Lowering transmission power Answer: C) Employing spread spectrum techniques

Satellite Communication MCQs

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