Online Questions and Answers Topic Outline
- MCQs in Satellite System
- MCQs in Types of Satellite
- MCQs in Satellite Orbit
- MCQs in Uplink considerations
- MCQs in Demand Assignments Multiple Access
- MCQs in Antenna Tracking
- MCQs in Satellite Link Budgets
- MCQs in Satellite Path Loss
- MCQs in Satellite Figure of Merit
- MCQs in Ratio of Carrier to thermal Noise Power
- MCQs in Station Margin
- MCQs in VSAT
MCQs in Satellite Communications Series
Following is the list of multiple choice questions in this brand new series:
Start Practice Exam Test Questions Part I of the Series
1. Which of the following is the first active satellite?
- A. Echo I
- B. Telstar I
- C. Early Bird
- D. Sputnik I
2. Which of the following is the first commercial satellite?
- A. Early Bird
- B. Telstar
- C. Explorer
- D. Courier
3. What is the first passive satellite transponder?
- A. Sun
- B. Early Bird
- C. Score
- D. Moon
4. The first satellite to receive and transmit simultaneously
- A. Intelsat I
- B. Agila I
- C. Syncorn I
- D. Telstar I
5. A helical antenna is used for satellite tracking because of
- A. circular polarization
- B. maneuverability
- C. beamwidth
- D. gain
6. Repeaters inside communications satellites are known as
- A. Trancievers
- B. Transponders
- C. Transducers
- D. TWT
7. Considered as the unsolved problem in satellite system
- A. Coverage
- B. Cost
- C. Access
- D. Privacy
8. ___________ is a satellite that rotates around the earth in a low-altitude elliptical or circular pattern.
- A. Geosynchronous satellite
- B. Nonsynchronous satellite
- C. Prograde satellite
- D. Retrograde satellite
9. Is the geographical representation of a satellite antenna radiation pattern
- A. Footprint
- B. Spot
- C. Earth
- D. Region
10. The smallest beam of a satellite antenna radiation pattern
- A. Zone beam
- B. Hemispheric beam
- C. Spot beam
- D. Global beam
11. A satellite beam that covers almost 42.4% of the earths surface.
- A. Zone beam
- B. Hemispheric beam
- C. Spot beam
- D. Global beam
12. What is the frequency range of C-band?
- A. 8.5 to 12.5 GHz
- B. 3.4 to 6.425 GHz
- C. 12.95 to 14.95 GHz
- D. 27.5 to 31 GHz
13. A satellite signal transmitted from a satellite transponder to earth’s station.
- A. Uplink
- B. Downlink
- C. Terrestrial
- D. Earthbound
14. Collects very weak signals from a broadcast satellite
- A. Helical antenna
- B. Satellite dish
- C. LNA
- D. TWT
15. What is a device that detects both vertically and horizontally polarized signals simultaneously?
- A. Orthomode transducer
- B. Crystal detector
- C. Optoisolator
- D. Isomode detector
16. _________ detects the satellite signal relayed from the feed and converts it to an electric current, amplifies and lower its frequency.
- A. Horn antenna
- B. LNA
- C. Satellite receiver
- D. Satellite dish
17. Is a loss of power of a satellite downlink signal due to earth’s atmosphere.
- A. Atmospheric loss
- B. Path loss
- C. Radiation loss
- D. RFI
18. What height must a satellite be placed above the surface of the earth in order for its rotation to be equal to earth’s rotation?
- A. 26,426.4 miles
- B. 27,426.4 miles
- C. 23,426.4 miles
- D. 22,426.4 miles
19. Point on the satellite obits closest to the earth.
- A. Apogee
- B. Perigee
- C. Prograde
- D. Zenith
20. The earth area covered by a satellite radio beam.
- A. Beamwidth
- B. Bandwidth
- C. Footprint
- D. Zone
21. What is the local oscillator (mixer) frequency of the satellite with an uplink frequency in GHz band?
- A. 3500 MHz
- B. 4500 MHz
- C. 2225 MHz
- D. 2555 MHz
22. What kind of battery panels are used in some advance satellites
- A. Germanium based panels
- B. Silicon based panel
- C. Galium Phosphate solar panel array
- D. Galium Arsenide solar panel array
23. Satellite engine uses
- A. jet propulsion
- B. ion propulsion system
- C. liquid fuel
- D. solar jet
24. A satellite batter has more power but lighter.
- A. Lithium
- B. Leclanche
- C. Hydrogen
- D. Magnesium
25. What kind of battery used by older satellites?
- A. Lithium
- B. Leclanche
- C. Hydrogen
- D. Magnesium
26. VSAT was made available in
- A. 1979
- B. 1981
- C. 1983
- D. 1977
27. What band does VSAT first operate?
- A. L-band
- B. X-band
- C. C-band
- D. Ku-band
28. The first Philippine Mabuhay satellite has how many channels?
- A. 30
- B. 24
- C. 48
- D. 50
29. The first Philippine Agila I will have how many transponders.
- A. 36
- B. 48
- C. 24
- D. 12
30. How may satellite orbital slots are requested by the Philippine Government from ITU?
- A. 2
- B. 4
- C. 6
- D. 8
31. The location of AsiaSat I.
- A. 105.5˚ East
- B. 151.5˚ East
- C. 115.5˚ East
- D. 170.5˚ East
32. AsiaSat I covers how many countries in Asia?
- A. 38
- B. 10
- C. 28
- D. 15
33. The owner of AsiaSat 2 is
- A. Asia Satellite Telecommunications Company (ASTC)
- B. Japan Satellite System (JSAT)
- C. China Great Wall Industry Corporation
- D. Singapore Satellite Commision
34. What is the approximate path loss from satellite-to-earth station?
- A. 100 dB
- B. 150 dB
- C. 175 dB
- D. 200 dB
35. INTELSAT stands for
- A. Intel Satellite
- B. International Telephone Satellite
- C. International Telecommunications Satellite
- D. International Satellite
36. The frequency of Ku band for satellite communications.
- A. 6/4 GHz
- B. 14/11 GHz
- C. 12/14 GHz
- D. 4/8 GHz
37. A satellite cross-link means
- A. Earth-to-satellite link
- B. Satellite-to-earth link
- C. Satellite-to-satellite link
- D. None of these
38. Earth station uses what type of antenna
- A. Despun antenna
- B. Helical antenna
- C. Toroidal antenna
- D. Cassegrain antenna
39. What is the delay time for satellite transmission from earth transmitter to earth receiver?
- A. 0.5 s
- B. 1.0 s
- C. 5 ms
- D. 0.25 ms
40. The bandwidth of C-band satellite frequency band in U.S.
- A. 500 GHz
- B. 1000 GHz
- C. 1000 MHz
- D. 500 MHz
41. The most common device used as an LNA is
- A. zener diode
- B. tunnel diode
- C. IMPATT
- D. Shockley diode
42. The radiation patterns of earth coverage antennas have a beamwidth of approximately
- A. 21˚
- B. 5˚
- C. 17˚
- D. 35˚
43. A mobile satellite array has usually how many elements?
- A. 6
- B. 88
- C. 12
- D. 14
44. In a typical mobile satellite array antenna if three elements are activated, how many elements are deactivated?
- A. 3
- B. 11
- C. 5
- D. 9
45. What circuit is responsible in activating and deactivating adjacent antenna elements in a mobile satellite array?
- A. Radial divider
- B. Divider/combiner
- C. Radial combiner
- D. Radial multiplexer
46. Most mobile satellite array uses ___________ in transforming 50 to 150 Ω impedance.
- A. stub
- B. balun
- C. quarter-wavelength transformer
- D. microstrip tapers.
47. The switching from one element to the other element in a typical mobile satellite array.
- A. Series
- B. Radial
- C. Matrix
- D. Shunt
48. A method of multiple accessing where a given RF channel bandwidth is divided inot smaller frequency band.
- A. CDMA
- B. ANIK-D
- C. TDMA
- D. FDMA
49. What is the delay time for satellite transmissions from earth transmitter to earth receiver?
- A. 0.5 s
- B. 1s
- C. 5 ms
- D. 0.25 s
50. As the height of a satellite orbit gets lower, the speed of the satellite _________.
- A. increases
- B. decreases
- C. remains the same
- D. None of the above
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