Satellite Communication MCQ Questions and Answers for Practice

1. A synchronous satellite orbits the earth once in

1. 1 hours
2. 24 hours
3. 12 hours
4. 6 hours

2. For an elliptical orbit?

1. None of the above
2. 0 < e < 1
3. e = 0
4. e = 1

3. The velocity of a geostationary satellite is nearly

1. 12644 km/hr
2. 1255 km/hr
3. 6757 km/hr
4. 9422 km/hr

4. The optimum working frequency for satellite systems lies between

1. 100 GHz and 200 GHz
2. 20 MHz and 100 MHz
3. 2 GHz and 12 GHz
4. 20 GHz and 100 GHz

5. Geostationary satellites are located at a height of

1. 3600,000 km from earths surface
2. 3600 km from earths surface
3. 36000 km from earths surface
4. 360,000 km from earths surface

6. Calculate the radius of a circular orbit for which the period is 1 day?

1. 2.241 Km
2. 42.241 Km
3. 42.241 m
4. 4.241 Km

7. The down link frequency in the C band transponder is

1. 11 GHz
2. 6 GHz
3. 4 GHz
4. 14 GHz

8. What is an error detecting code?

1. None of these
2. A code which allows for the detection of errors is termed an error detecting code.
3. A code which allows for the correcting of errors is termed an error detecting code.
4. a&b.

9. ARQ stands for

1. Aerial range quartz crystel
2. Accelerated redirection facility
3. Amplitude ratiodetector quantizing noise
4. Automatic repeat request

10. In satellite communication modulation is used

1. PAM
2. AM
3. FM
4. PWM

11. In analog technique of modulation in satellite, the most commonly employed system is

1. PWM
2. AM
3. FM
4. PAM

12. Sound signals in TV are

1. a and c
2. amplitude modulated
3. dc modulated
4. frequency modulated

13. Video signals in TV are

1. None of these
2. Amplitude modulated
3. de-modulated
4. Frequency modulated

14. For globle communication, the minimum number of satellites needed is

1. 11
2. 1
3. 3
4. 7

15. Shannons law relates

1. Information carring capacity to S/N ratio
2. Antenna gain to bandwidth
3. Frequency to antenna gain
4. Antenna gain to transmission losses