Satellite Communication(Engineering > Electrical Engineering ) Questions and answers for exam Preparation

Question 1. Collects very weak signals from a broadcast satellite

Helical antenna
Satellite dish
LNA
TWT

Explanation:-

Answer: Option B. -> Satellite dish

Question 2. Is a loss of power of a satellite downlink signal due to earth’s atmosphere.

Atmospheric loss
Path loss
Radiation loss
RFI

Explanation:-

Answer: Option B. -> Path loss

Question 3. As the height of a satellite orbit gets lower, the speed of the satellite ___________.

Increases
Decreases
Remains the same
None of the above

Explanation:-

Answer: Option A. -> Increases

Question 4. Considered as the unsolved problem in satellite system

Coverage
Cost
Access
Privacy

Explanation:-

Answer: Option D. -> Privacy

Question 5. A satellite beam that covers almost 42.4% of the earths surface.

Zone beam
Hemispheric beam
Spot beam
Global beam

Explanation:-

Answer: Option D. -> Global beam

Question 6. Most mobile satellite array uses ___________ in transforming 50 to 150 Ω impedance.

Stub
Balun
Quarter-wavelength transformer
Microstrip tapers

Explanation:-

Answer: Option C. -> Quarter-wavelength transformer

Question 7. A satellite signal transmitted from a satellite transponder to earth’s station.

Uplink
Downlink
Terrestrial
Earthbound

Explanation:-

Answer: Option B. -> Downlink

Question 8. A helical antenna is used for satellite tracking because of

Circular polarization
Maneuverability
Beamwidth
Gain

Explanation:-

Answer: Option A. -> Circular polarization

Question 9. What band does VSAT first operate?

L-band
X-band
C-band
Ku-band

Explanation:-

Answer: Option C. -> C-band

Question 10. VSAT was made available in

1979
1981
1983
1977

Explanation:-

Answer: Option A. -> 1979