Satellite Communication problems
- 1. India's Polar Satellite Launch vehicle (PSLV) to be ready in 1991 is designed to launch 1000 kg spacecraft into __________ orbit.
Options- A. geostationary
- B. equatorial
- C. polar
- D. sun-synchronous polar Discuss
Correct Answer: sun-synchronous polar
- 2. Geosynchronous communication satellites travel around the earth in circular orbits with a forward speed of about __________ km/h.
Options- A. 11200
- B. 0
- C. 36000
- D. 22800 Discuss
Correct Answer: 11200
- 3. Phase modulation is commonly-used for data transmission mainly because
Options- A. phase can be varied from + 180° to 180°
- B. it is resistant to the effects of noise
- C. demodulation is very easy
- D. it gives highest data rates that can be transmitted over a given channel Discuss
Correct Answer: it is resistant to the effects of noise
- 4. When a communication satellite passes into Earth's shadow, its temperature drops to about __________ ° K.
Options- A. 273
- B. 243
- C. 170
- D. 123 Discuss
Correct Answer: 123
- 5. Point out the false statement.
Launching of geostationary experimental communication satellite has helped India to gain experience in
Options- A. Building, for the time, a body-stabilized geosynchronous communication satellite with its own apogee propulsion and control systems
- B. Attitude control and station management operations for a geostationary satellite
- C. Building launching rocket Ariane for putting APPLE in orbit
- D. Domestic communications on an experimental basis Discuss
Correct Answer: Building launching rocket Ariane for putting APPLE in orbit
- 6. APPLE was into orbit on 19 th June 1981 by European Space Agency (ESA) from
Options- A. Cape Canaveral in Florida
- B. Kourou in French Guyana
- C. Canarvon in Western Australia
- D. Bangalore in South India Discuss
Correct Answer: Kourou in French Guyana
- 7. Master control facility (MCF) for INSAT-2 series satellites is located at
Options- A. Madras
- B. New Delhi
- C. Leh
- D. Hassan Discuss
Correct Answer: Hassan
- 8. A telephone user while talking to a person via a satellite has to wait for reply for about __________ millisecond.
Options- A. 100
- B. 270
- C. 470
- D. 540 Discuss
Correct Answer: 540
- 9. In the context of error detection in satellite transmission, ARQ stands for
Options- A. Automatic Repeat Request
- B. Automatic Relay Request
- C. Accelerated Recovery Request
- D. Automatic Radiation Quenching Discuss
Correct Answer: Automatic Repeat Request
- 10. Depending on the technique used, digitized television requires a bit rate between __________ millions.
Options- A. 40 and 92.5
- B. 25 and 60
- C. 30 and 82.5
- D. 2 Discuss
Correct Answer: 40 and 92.5
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