Satellite Communication Multiple Choice Questions and Answers

1. The velocity of a geostationary satellite is nearly

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

2. A synchronous satellite orbits the earth once in

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

3. For an elliptical orbit?

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

4. The optimum working frequency for satellite systems lies between

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

5. Geostationary satellites are located at a height of

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

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

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

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

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

8. What is an error detecting code?

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

9. ARQ stands for

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

10. In satellite communication modulation is used

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