Satellite Communication problems
- 1. The quality of a space-link is measured in terms of the __________ ratio.
Options- A. C/N
- B. S/N
- C. G/T
- D. EIRP Discuss
Correct Answer: C/N
- 2. A geosynchronous satellite
Options- A. has the same period a that of the Earth
- B. has a circular orbit
- C. rotates in the equatorial plane
- D. has all of the above Discuss
Correct Answer: has all of the above
- 3. The useful operational life of INSAT-IB (launched in 1983) is expected to end by
Options- A. 1992-93
- B. 1991-92
- C. 1989-90
- D. 1993-94 Discuss
Correct Answer: 1989-90
- 4. For global communication, the number of satellites needed is
Options- A. 1
- B. 3
- C. 10
- D. 5 Discuss
Correct Answer: 3
- 5. A certain sound has 10000 times more energy than another sound. The number of times it would sound stronger to a listener is
Options- A. 40
- B. 10000
- C. 100
- D. 10 Discuss
Correct Answer: 40
- 6. A communication satellite is a repeater between
Options- A. a transmitting station and a receiving station
- B. a transmitting station and many receiving station
- C. many transmitting station and many receiving station
- D. none Discuss
Correct Answer: many transmitting station and many receiving station
- 7. Satellite launch sites are invariably located on Eastern seaboards to ensure that
Options- A. launch takes place eastward
- B. expenditure of propulsion fuel is reduced during plane changing
- C. the satellite achieves circular orbit quickly
- D. spent rocket motor and other launcher debris falls into the sea Discuss
Correct Answer: spent rocket motor and other launcher debris falls into the sea
- 8. To make antenna more directional, either its size must be increased or
Options- A. the number of its feed horns must be increased
- B. the frequency of its transmission must be increased
- C. its effective isotropic radiated power (EIRP) must be increased
- D. its footprint must be increased Discuss
Correct Answer: the frequency of its transmission must be increased
- 9. Which of the following factor does NOT contribute to the drift of a geostationary satellite from its stationary position in space?
Options- A. Pressure of solar radiations
- B. Gravitational changes due to Sun and Moon
- C. Oblateness of the Earth
- D. Weight of the satellite Discuss
Correct Answer: Weight of the satellite
- 10. Which one of the following statements regarding DSI is wrong?
Options- A. It is a digital form of TASI
- B. Though it is more efficient than TASI, it is much slower
- C. A speaker has to wait (it at all) for only a few milliseconds for reallocation of channel
- D. It has increased the capacity of satellite channels by a factor of 2.2 or more with out degrading speech quality Discuss
Correct Answer: Though it is more efficient than TASI, it is much slower
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