Satellite Communication — Part 2 MCQs with Explanations

Sputnik I is the correct answer to “Which of the following is the first active satellite”. This question is standard in competitive examination syllabi for Satellite Communication.

Early Bird is the correct answer to “What is the first passive satellite transponder”. This question is standard in competitive examination syllabi for Satellite Communication.

200 dB is the correct answer to “What is the approximate path loss from satellite-to-earth station”. This question is standard in competitive examination syllabi for Satellite Communication.

22,426.4 miles is the correct answer to “What height must a satellite be placed above the surface of the earth in order for its rotation to be equal to earth’s rotation”. This question is standard in competitive examination syllabi for Satellite Communication.

36 is the correct answer to “The first Philippine Agila I will have how many transponders.”. This question is standard in competitive examination syllabi for Satellite Communication.

Cassegrain antenna is the correct answer to “Earth station uses what type of antenna”. This question is standard in competitive examination syllabi for Satellite Communication.

China Great Wall Industry Corporation is the correct answer to “The owner of AsiaSat 2 is”. This question is standard in competitive examination syllabi for Satellite Communication.

38 is the correct answer to “AsiaSat I covers how many countries in Asia”. This question is standard in competitive examination syllabi for Satellite Communication.

14 is the correct answer to “A mobile satellite array has usually how many elements”. This question is standard in competitive examination syllabi for Satellite Communication.

With respect to a spot on earth it looks stationary is the correct answer to “A geostationary orbit is chosen for communication satellite because:”. This question is standard in competitive examination syllabi for Satellite Communication.

A and B both is the correct answer to “A satellite earth station has”. This question is standard in competitive examination syllabi for Satellite Communication.

Pulse energy is the correct answer to “The maximum range of pulsed radar depends on”. This question is standard in competitive examination syllabi for Satellite Communication.

Excessive intermodulation problems can be avoided is the correct answer to “Normal practice in satellite communications is to have transponders to narrow bandwidth because”. This question is standard in competitive examination syllabi for Satellite Communication.

equatorial orbit is the correct answer to “Geostationary satellites are generally placed in”. This question is standard in competitive examination syllabi for Satellite Communication.

Large bandwidth and severe noise is the correct answer to “In satellite communication, frequency modulation is used because satellite channel has”. This question is standard in competitive examination syllabi for Satellite Communication.

24 hrs is the correct answer to “The orbital period of a geostationary satellite is”. This question is standard in competitive examination syllabi for Satellite Communication.

GEO stationary satellites is the correct answer to “Line-off-sight propagation is done by”. This question is standard in competitive examination syllabi for Satellite Communication.

1 dB is the correct answer to “In radar propagation, above 100 MHz, the ionospheric attenuation seldom exceeds”. This question is standard in competitive examination syllabi for Satellite Communication.

C/N is the correct answer to “The quality of the space link is measured in terms of the”. This question is standard in competitive examination syllabi for Satellite Communication.

Code Division Multiple Access (CDMA) is the correct answer to “The spread spectrum communication techniques are used in one of the following multiple access methods in satellite communication:”. This question is standard in competitive examination syllabi for Satellite Communication.

Homing guidance is the correct answer to “In the radar guidance of missiles where the missile has its own radar and its extracts the tracking data from the target reflected energy, the technique is known as”. This question is standard in competitive examination syllabi for Satellite Communication.

-20log(λ) + 173.07 is the correct answer to “For a GEO satellite, what is the free space loss (L db ) at the equator in terms of carrier wavelength (λ)”. This question is standard in competitive examination syllabi for Satellite Communication.

11.0 K is the correct answer to “In a satellite ground station, the received signal is directly amplified in a low noise parametric amplifier followed by a FET amplifier. The gains and effective noise temperatures of the amplifiers are 20 dB, 9.0 K and 10 dB, 200 K respectively. The effective noise temperature of the combination is”. This question is standard in competitive examination syllabi for Satellite Communication.

Solar cells is the correct answer to “Energy required for satellite is generally derived from”. This question is standard in competitive examination syllabi for Satellite Communication.

increase the isolation between transmitter and receiver is the correct answer to “The uplink and downlink frequencies are made different in satellite links in order to”. This question is standard in competitive examination syllabi for Satellite Communication.

$$\sqrt {\frac{{{\text{GM}}}}{{\text{r}}}} {\text{m/s}}$$ is the correct answer to “Linear velocity of a satellite equals Where G(Gravity constant) = 6.67 × 10 -11 m 3 /kg-sec, M = mass of earth, r = radius of circular orbit”. This question is standard in competitive examination syllabi for Satellite Communication.

more than the critical frequency of ionosphere is the correct answer to “For satellite communication, the frequency should be-”. This question is standard in competitive examination syllabi for Satellite Communication.

Molniya orbit is the correct answer to “A highly inclined and highly eccentric orbit used by majority of communication satellites launched by Russia is also known as”. This question is standard in competitive examination syllabi for Satellite Communication.

Circuit is the correct answer to “In . . . . . . . . switching a dedicated link/path is established across the sender and the receiver which is maintained for the entire duration of conversation”. This question is standard in competitive examination syllabi for Satellite Communication.

$${{\text{R}}^{\frac{3}{2}}}$$ is the correct answer to “The orbital period of a satellite in circular orbit of radius R from the centre of the earth, is proportional to:”. This question is standard in competitive examination syllabi for Satellite Communication.

2 is the correct answer to “There is (are) . . . . . . . . orbit(s) for a GEO satellite.”. This question is standard in competitive examination syllabi for Satellite Communication.

1, 2 and 3 is the correct answer to “In a satellite communication, the uplink power level is generally high and power level of the received down link signal is low because: 1. High signal attenuation due to free-space loss 2. Limited available down link power 3. Finite satellite down link antenna gain, which is dictated by the required coverage area”. This question is standard in competitive examination syllabi for Satellite Communication.

always less than that of individual is the correct answer to “A satellite link has same carrier to noise ratio in uplink as well as in downlink. Overall carrier to noise ratio will be-”. This question is standard in competitive examination syllabi for Satellite Communication.

0° is the correct answer to “The angle of inclination of a satellite whose orbit is over the equator is”. This question is standard in competitive examination syllabi for Satellite Communication.

Step-track is the correct answer to “Which one of the following techniques is not suitable for automatic satellite tracking”. This question is standard in competitive examination syllabi for Satellite Communication.

is motionless in space (except for its spin) is the correct answer to “A geostationary satellite”. This question is standard in competitive examination syllabi for Satellite Communication.

Both receive filter and transmit filter is the correct answer to “Diplexer is made of”. This question is standard in competitive examination syllabi for Satellite Communication.

√2 is the correct answer to “Doubling the aperture area of a radar's antenna increases the radar range by”. This question is standard in competitive examination syllabi for Satellite Communication.

Horn Antenna is the correct answer to “The signal is sent back to earth by satellite by means of”. This question is standard in competitive examination syllabi for Satellite Communication.

Receiver can achieve synchronism in sweep is the correct answer to “A television composite video signal is found to contain a large number of pulses. These pulses are provided so that”. This question is standard in competitive examination syllabi for Satellite Communication.