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Satellite Communication Question & Answers

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This article lists 100 Satellite Communication MCQs for engineering students. All the Satellite Communication Questions & Answers given below include a hint and wherever possible link to the relevant topic. This is helpful for users who are preparing for their exams, interviews, or professionals who would like to brush up their fundamentals on Satellite Communication topic.

A satellite is an object in space that is placed between other communicating space orbits for a communication purpose between the space workstation and earth work station. This communication process between satellite and earth work station is called satellite communication. There are two types of communication satellites, they are natural satellites like the sun and moon and human-made satellites also called artificial satellite-like FalconSAT-1, AISAT-1, etc. Satellites are generally classified into several types namely communication satellite, remote sensing satellite, navigation satellite, LEO - Low earth orbit, MEO - medium earth orbit, HEO – Highly elliptical orbit, GPS, GEO, Drone Satellite, Ground Satellite, and Polar satellite. The advantages of satellite communication are it covers maximum bandwidth, provides elasticity property, and is more reliable. The disadvantages of satellite communication, are it is a cost-effective procedure, it may block frequencies depending on the medium it travels and there is a chance for signal interference. Some of the applications of satellite communication are TV, radio, mobile phones, etc.

1). Satellite communication has _________ a number of components.
HintSatellite communication has 2 components namely, the ground segment and the space segment.
2). Which of the following statement is true according to a ground segment of satellite communication?
HintA ground segment of satellite communication has stationary or mobile transmission, reception, and ancillary equipment.
3). Which of the following statement is true according to the space segment of satellite communication?
HintThe space segment of satellite communication is a satellite itself.
4). A typical satellite link involves in _______ of a signal from an earth station to a satellite.
HintA typical satellite link involves in up-linking of a signal from an earth station to a satellite.
5). After the up-linking process, a satellite _____ and _____ the signal.
HintAfter the up-linking process, a satellite receives and amplifies the signal.
6). Does the satellite retransmits the signal to the earth station after amplifying?
HintYes, a satellite retransmits the signal to the earth's station after amplifying it.
7). Which of the following are the satellite receivers on the earth station?
HintThe satellite receivers on earth station are DTH satellite equipment, mobile reception equipment in aircraft, satellite telephones.
8). DTH in DTH satellite equipment stands for ________.
HintDTH in DTH satellite equipment stands for direct to home.
9). Which of the following is the first artificial satellite?
HintThe first artificial satellite is Sputnik.
10. Which of the following is the vehicle used to launch IRNSS-1H?
HintThe vehicle used to launch IRNSS-1H is PSLV C39/IRNSS1H Mission.
11). Which of the following is the vehicle used to launch -GSAT-17?
HintThe vehicle used to launch -GSAT-17 is Ariane-5 VA 238.
12). Which of the following is the vehicle used to launch the Cartosat-2 series satellite?
HintThe vehicle used to launch the Cartosat-2 series satellite is PSLV-C38/ Cartosat-2 series satellite.
13). Which of the following is the vehicle used to launch the GSAT-19 satellite?
HintThe vehicle used to launch the GSAT-19 satellite is GSLV Mk III-D1/GSAT-19 Mission.
14). In which year Sputnik1 artificial satellite was launched.
HintSputnik1 artificial satellite was launched in the year 1957.
15). NASA stands for ______.
HintNASA stands for National Aeronautics and Space Administration.
16). Which of the following is the first 2 way communication active satellite?
HintThe first 2-way communication active satellite is Telstar.
17). Which of the following are the examples of digital satellites?
HintExamples of digital satellites are FalconSAT-2, FalconSAT-1, and AISAT-1.
18). Which of the following is the basic classification of satellites are present?
HintThere are, 2 types of satellites namely – man-made satellites also called artificial satellites, and natural satellites.
19). Which of the following are the examples of natural satellites?
HintExamples of natural satellites are the sun, moon, and planets.
20). Which of the following are man made satellites?
HintMan-made satellites are FalconSAT-1, AISAT-1, etc.
21). Satellites are classified into ______ types.
HintSatellites are classified into 9 types namely communication satellite, remote sensing satellite, navigation satellite, LEO, MEO, HEO, GPS, GEO, Drone Satellite, Ground Satellite, and Polar satellite.
22). GPS stands for _______.
HintGPS stands for Global Positioning System.
23). GEOs stands for _______.
HintGEOs stands for Geostationary Satellite.
24). How many techniques are used for achieving multiple access?
HintThere are 3 techniques used for achieving multiple access, namely TDMA – Time-division multiplexing, FDMA – frequency division multiplexing, CDMA – Code division multiplexing.
25). Which of the following statement is true regarding frequency division multiplexing?
HintFrequency division multiplexing has certain properties like it assigns a single user with a single channel, minimizes crosstalk by using guard bands and no user can share another user's frequency band at a time.

Satellite Communication Exam Questions & Answers

26). FDD technique in multiplexing stands for _______.
HintFDD technique in multiplexing stands for frequency division duplex.
27). Which of the following statement is true regarding the FDD satellite technique?
HintFDD satellite technique provides users with a channel and a pair of frequencies namely both upward channel and downward channel.
28). FDMA is used in ______ systems.
HintFDMA is used in analog systems.
29). Which of the following are the examples of FDMA?
HintThe examples of FDMA are AMPS, NMT and Radiocom.
30). Is FDMA a continuous transmission scheme.
HintYes, FDMA a continuous transmission scheme.
31). Which of the following are the examples of analog systems that FDMA is implemented?
HintThe examples of analog systems that FDMA is implemented are AMPS – advanced mobile aphone service, NMT – Nordic mobile telephone, Radicom 2000.
32). Which of the following are the advantages of FDMA?
HintThe advantages of FDMA are - it is easy to implement, it is a continuous transmission scheme and less complex scheme.
33). Which of the following are the disadvantages of FDMA?
HintThe disadvantages of FDMA are it has a higher cell site, it uses duplexers and it requires tight RF filtering.
34). TWT stands for _______.
HintTWT stands for Travelling wave tube.
35). Which of the following statement is true for satellite communication?
HintSatellite communication is a method to transport information from one place to another place via satellite.
36). A communication satellite is a _______ satellite.
HintA communication satellite is an artificial satellite.
37). A communication satellite uses ______ to transmit signal.
HintA communication satellite uses a transponder to transmit a signal.
38). Which of the following are the components in satellite communication?
HintThe components in satellite communication are mixer, transponder, filter, amplifier, local oscillator, amplifier, multiplexers.
39). What is the maximum distance covered by satellite communication?
HintThe maximum distance covered by satellite communication is 1500km.
40). Which of the following are the main components in satellite communication?
HintThe main components in satellite communication are uplink, downlink, and transducer.
41). Which of the following is the function of a transponder?
HintThe function of a transponder is to boots incoming signals and change their frequency.
42). INSAT stands for ________.
HintINSAT stands for Indian National Satellite.
43). How many transponders are present in an INSAT?
HintThere are more than 200 transponders are present in an INSAT.
44). Satellite communication services are classified into how many types?
HintSatellite communication services are classified into 2 types, one-way, and two-way communication.
45). Which of the following is a true statement according to one way satellite communication?
HintOne way satellite communication takes place between one or multiple earth stations via satellite.
46). Which of the following is a true statement according to two way satellite communication?
HintIn two-way satellite communication, information is exchanged between two earth stations.
47). Which of the following are the examples of one way satellite communication?
HintExamples of one-way satellite communication are radio tracks space operation service and internet services.
48). Which of the following are the advantages of satellite communication?
HintThe advantages of satellite communication are it covers maximum bandwidth, provides elasticity property, and is highly reliable.
49). Which of the following are the disadvantages of satellite communication?
HintThe following are the disadvantages of satellite communication, they are it is a cost-effective procedure, it may block frequencies and there is a chance for signal interference.
50). Which of the following are the applications of satellite communications?
HintThe applications of satellite communications are TV, radio, military communication.

Satellite Communication MCQs with Answers

51). Which of the following countries have their own satellites?
HintThe countries that have their own satellites are India, China, Japan.
52). Which of the following is the own satellite of India?
HintIndia has its own satellite name “Rohini D1”.
53). Which of the following is the own satellite of China?
HintChina has its own satellite name” Dong Fang Hong I”.
54). Which of the following is the own satellite of Japan?
HintJapan has its own satellite name “Ohsumi”.
55). A spacecraft capable of supporting a human crew in orbit for an extended period of time is called _______.
HintA spacecraft capable of supporting a human crew in orbit for an extended period of time is called a space station or an orbital space.
56). How many laws of Kepler supports satellite communication?
HintKepler supports satellite communication 3 laws.
57). Which of the following is true regarding Kepler's first law?
HintKepler's first law, states that the sun is at the center, and other planets revolve around it in an elliptical manner.
58). Which of the following is true regarding Kepler's second law?
HintKepler's second law, states that the area covered by satellites with respect to the center of the earth is equal, at regular intervals of time.
59). Which of the following is true regarding Kepler's third law?
HintKepler's third law, states that the square of a time period of an orbit is proportional to the mean distance to the power of three between 2 bodies.
60). Which of the following is the factor the carrier to noise ratio of a satellite depends on?
HintThe factor the carrier to noise ratio of a satellite depends on are Bandwidth, the path loss that provides free loss and an isotropic antenna radiates power effectively.
61). Which of the following are the units of data rate?
HintThe unit of data rate is bits/sec.
62). Which of the following are the units of Swath width?
HintThe unit of Swath width is Meters.
63). Which of the following are the units of Across track pixel dimension?
HintThe units of Across track pixel dimension is Meters.
64). Which of the following are the units of ground track velocity?
HintThe units of ground track velocity is Meters/second.
65). Which of the following are the units of along track pixel dimension?
HintThe units of along-track pixel dimension in meters.
66). Which of the following are the units of bits/pixel?
HintThe units of bits/pixel is bits.
67). Which of the following is true when the data rate is reduced?
HintWhen the data rate is reduced, the duty cycles are increased, a change in amplitude is observed and there will be compression in the data.
68). How many types of orbits are present in satellite communication?
HintThere are 4 types of orbits are present in satellite communication namely, GEO, MEO, LEO, HEO.
69). GEO stands for ______.
HintGeo stands for geostationary orbit.
70). MEO stands for _______.
HintMEO stands for medium earth orbit.
71). LEO stands for ______.
HintLEO stands for Low earth orbit.
72). Do geosynchronous orbits have the same rotational velocity as earth?
HintYes, geosynchronous orbits do have the same rotational velocity as earth.
73). What is the velocity of geosynchronous orbit?
HintThe velocity of geosynchronous orbit is 11300 km/hr.
74). Which of the following orbit has equal lower altitude and higher velocity?
HintThe orbit that has equal lower altitude and higher velocity Asynchronous orbit.

Satellite Communication Interview Questions & Answers

75). GEO is _______ km away from the earth.
HintGEO is 36000 km away from earth.
76). MEO is _______ km away from the earth.
HintMEO is 6000 – 20,000km away from earth.
77). LEO is ______ km away from the earth.
HintLEO is 500 – 1500 km away from the earth.
78). Is geostationary not useful for global coverage?
HintYes, geostationary is not useful for global coverage.
79). Does MEO requires fewer satellites?
HintYes, MEO requires fewer satellites.
80). A MEO satellite distance gives ____ and ____ signal compared to LEO.
HintAn MEO satellite distance gives time delay and weak signal compared to LEO.
81). Which of the following orbit is much close to earth?
HintLEO orbit is much close to earth than GEO.
82). Does LEO orbit requires routing?
HintYes, LEO orbit requires routing.
Read more about Routing.
83). ISL stands for _______.
HintISL stands for intersatellite link.
84). GWL stands for _______.
HintGWL stands for Gateway Link.
85). UML stands for _______.
HintUML stands User mobile link.
86). Which of the following connects 2 satellites on different objects?
HintISL connects 2 satellites on different objects.
87). Which of the following are the algorithms used in satellite communication?
HintThe algorithms used in satellite communication MHA – minimum hops algorithm, MCA – Minimum cost Algorithm, Dijkstra shortest algorithm.
88). What is the altitude of geosynchronous orbit?
HintThe altitude of geosynchronous orbit is 35786km.
89). PIM stands for ________.
HintPIM stands Pulse interval modulation.
90). Which of the following is an uplink satellite?
HintIn an uplink satellite, a signal is transmitted from the earth station to the satellite.
91). Which of the following is a downlink satellite?
HintIn a downlink satellite signal transmitted from the satellite to the earth station.
92). Simplex type transmission is observed in ______.
HintSimplex type transmission is observed in TV.
93). Which of the following condition satisfies for an elliptical orbit?
HintThe condition that satisfies an elliptical orbit is 0<=e.
94). The point far from the earth is called ______.
HintThe point far from the earth is called Apogee.
95). The point close to earth is called _______.
HintThe point close to earth is called Perigee.
96). Which of the following technique is suitable for digital transmission?
HintTDMA technique is suitable for digital transmission.
97). The signals that are transmitted and received are separated using _____.
HintThe signals that are transmitted and received are separated using diplexer.
98). The ratio between signal and noise power at the receiver is called ______.
HintThe ratio between signal and noise power at the receiver is called SNR – a signal to noise ratio.
99). Units of SNR is _______.
HintUnits of SNR is dB.
100). Is sky noise a type of antenna losses?
HintYes, a sky noise is a type of antenna losses.

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