Satellite Communication Electronics
Category –EE Online Test
Telegram-Join Us On Telegram
Attempt Free Satellite Communication Electronics Here. Read The Important Electrical MCQ From Below.
1. Which of the following is the first active satellite?
A. Echo I
B. Telstar I
C. Early Bird
D. Sputnik I
ANSWERS:D
2. Which of the following is the first commercial satellite?
A. Early Bird
B. Telstar
C. Explorer
D. Courier
ANSWERS:B
3. What is the first passive satellite transponder?
A. Sun
B. Early Bird
C. Score
D. Moon
ANSWERS:B
Satellite Communication Electronics
4. The first satellite to receive and transmit simultaneously
A. Intelsat I
B. Agila I
C. Syncorn I
D. Telstar I
ANSWERS:A
5. A helical antenna is used for satellite tracking because of
A. circular polarization
B. maneuverability
C. beamwidth
D. gain
ANSWERS:A
6. Repeaters inside communications satellites are known as
A. Trancievers
B. Transponders
C. Transducers
D. TWT
ANSWERS:B
Satellite Communication Electronics
7. Considered as the unsolved problem in satellite system
A. Coverage
B. Cost
C. Access
D. Privacy
ANSWERS:D
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
ANSWERS:B
9. Is the geographical representation of a satellite antenna radiation
pattern
A. Footprint
B. Spot
C. Earth
D. Region
ANSWERS:A
10. The smallest beam of a satellite antenna radiation pattern
A. Zone beam
B. Hemispheric beam
C. Spot beam
D. Global beam
ANSWERS:C
Satellite Communication Electronics
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
ANSWERS:D
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
ANSWERS:B
13. A satellite signal transmitted from a satellite transponder to earth’s
station.
A. Uplink
B. Downlink
C. Terrestrial
D. Earthbound
ANSWERS:B
14. Collects very weak signals from a broadcast satellite
A. Helical antenna
B. Satellite dish
C. LNA
D. TWT
ANSWERS:B
Satellite Communication Electronics
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
ANSWERS:A
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
ANSWERS:C
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
ANSWERS:B
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
ANSWERS:D
Satellite Communication Electronics
19. Point on the satellite obits closest to the earth.
A. Apogee
B. Perigee
C. Prograde
D. Zenith
ANSWERS:B
20. The earth area covered by a satellite radio beam.
A. Beamwidth
B. Bandwidth
C. Footprint
D. Zone
ANSWERS:C
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
ANSWERS:C
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
ANSWERS:D
Satellite Communication Electronics
23. Satellite engine uses
A. jet propulsion
B. ion propulsion system
C. liquid fuel
D. solar jet
ANSWERS:B
24. A satellite batter has more power but lighter.
A. Lithium
B. Leclanche
C. Hydrogen
D. Magnesium
ANSWERS:A
ANSWERS:
25. What kind of battery used by older satellites?
A. Lithium
B. Leclanche
C. Hydrogen
D. Magnesium
ANSWERS:C
26. VSAT was made available in
A. 1979
B. 1981
C. 1983
D. 1977
ANSWERS:A
Satellite Communication Electronics
27. What band does VSAT first operate?
A. L-band
B. X-band
C. C-band
D. Ku-band
ANSWERS:C
28. The first Philippine Mabuhay satellite has how many channels?
A. 30
B. 24
C. 48
D. 50
ANSWERS:A
29. The first Philippine Agila I will have how many transponders.
A. 36
B. 48
C. 24
D. 12
ANSWERS:A
Satellite Communication Electronics
30. How may satellite orbital slots are requested by the Philippine Government from ITU?
A. 2
B. 4
C. 6
D. 8
ANSWERS:C
31. The location of AsiaSat I.
A. 105.5˚ East
B. 151.5˚ East
C. 115.5˚ East
D. 170.5˚ East
ANSWERS:A
32. AsiaSat I covers how many countries in Asia?
A. 38
B. 10
C. 28
D. 15
ANSWERS:A
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
ANSWERS:C
Satellite Communication Electronics
34. What is the approximate path loss from satellite-to-earth station?
A. 100 dB
B. 150 dB
C. 175 dB
D. 200 dB
ANSWERS:D
35. INTELSAT stands for
A. Intel Satellite
B. International Telephone Satellite
C. International Telecommunications Satellite
D. International Satellite
ANSWERS:C
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
ANSWERS:B
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
ANSWERS:C
Satellite Communication Electronics
38. Earth station uses what type of antenna
A. Despun antenna
B. Helical antenna
C. Toroidal antenna
D. Cassegrain antenna
ANSWERS:D
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
ANSWERS:A
40. The bandwidth of C-band satellite frequency band in U.S.
A. 500 GHz
B. 1000 GHz
C. 1000 MHz
D. 500 MHz
ANSWERS:D
Satellite Communication Electronics
41. The most common device used as an LNA is
A. zener diode
B. tunnel diode
C. IMPATT
D. Shockley diode
ANSWERS:B
42. The radiation patterns of earth coverage antennas have a beamwidth of
approximately
A. 21˚
B. 5˚
C. 17˚
D. 35˚
ANSWERS:C
43. A mobile satellite array has usually how many elements?
A. 6
B. 88
C. 12
D. 14
ANSWERS:D
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
ANSWERS:B
Satellite Communication Electronics
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
ANSWERS:A
46. Most mobile satellite array uses ___________ in transforming 50 to 150 Ω impedance.
A. stub
B. balun
C. quarter-wavelength transformer
D. microstrip tapers.
ANSWERS:C
47. The switching from one element to the other element in a typical mobile satellite array.
A. Series
B. Radial
C. Matrix
D. Shunt
ANSWERS:D
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
ANSWERS:D
Satellite Communication Electronics
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
ANSWERS:A
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
ANSWERS:A
TO DOWNLOAD PDF CLICK HERE
