Satellite Communication Question & AnswersMarch 30, 2021 By WatElectronics 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.1234HintSatellite 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?It has a stationary or mobile transmission, receptionIt has stationary or a mobile ancillary equipmentIt has stationary or dependent satellitesBoth a and bHintA 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?It has a stationary or mobile transmission, receptionIt has stationary or a mobile ancillary equipmentIt is a satelliteBoth a and bHintThe 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.UplinksDownlinksBoth a and bNone of the aboveHintA 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.Receives, amplifiesAmplifies, receivesReceives, adds noiseAdds noise and transmitsHintAfter the up-linking process, a satellite receives and amplifies the signal. 6). Does the satellite retransmits the signal to the earth station after amplifying?YesNoDepends on the climateHintYes, 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?DTH satellite equipmentMobile reception equipment in aircraftSatellite telephonesAll the aboveHintThe satellite receivers on earth station are DTH satellite equipment, mobile reception equipment in aircraft, satellite telephones. 8). DTH in DTH satellite equipment stands for ________.Direct to homeDirection to homeDetection of homeAll the aboveHintDTH in DTH satellite equipment stands for direct to home. 9). Which of the following is the first artificial satellite?SputnikGSAT-17GSAT19IRNSS-1HHintThe first artificial satellite is Sputnik. 10. Which of the following is the vehicle used to launch IRNSS-1H?PSLV C39/IRNSS1H MissionPSLV-C38/ Cartosat-2 series satelliteAriane-5 VA 238GSLV Mk III-D1/GSAT-19 MissionHintThe vehicle used to launch IRNSS-1H is PSLV C39/IRNSS1H Mission. 11). Which of the following is the vehicle used to launch -GSAT-17?PSLV C39/IRNSS1H MissionPSLV-C38/ Cartosat-2 series satelliteAriane-5 VA 238GSLV Mk III-D1/GSAT-19 MissionHintThe 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?PSLV C39/IRNSS1H MissionPSLV-C38/ Cartosat-2 series satelliteAriane-5 VA 238GSLV Mk III-D1/GSAT-19 MissionHintThe 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?PSLV C39/IRNSS1H MissionPSLV-C38/ Cartosat-2 series satelliteAriane-5 VA 238GSLV Mk III-D1/GSAT-19 MissionHintThe 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.1957195819601954HintSputnik1 artificial satellite was launched in the year 1957. 15). NASA stands for ______.National Auto Space AdministrationNational Aeronautics and Space AdministrationNet Aeronautics and Space AdministrationNational Aeronautics and satellite AdministrationHintNASA stands for National Aeronautics and Space Administration. 16). Which of the following is the first 2 way communication active satellite?TelstarFalconSAT-2FalconSAT-1AISAT-1HintThe first 2-way communication active satellite is Telstar. 17). Which of the following are the examples of digital satellites?FalconSAT-2FalconSAT-1AISAT-1All the aboveHintExamples of digital satellites are FalconSAT-2, FalconSAT-1, and AISAT-1. 18). Which of the following is the basic classification of satellites are present?Man made satellitesNatural satelliteBoth a and bAny of the aboveHintThere 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?SunMoonPlanetsAll the aboveHintExamples of natural satellites are the sun, moon, and planets. 20). Which of the following are man made satellites?FalconSAT-1AISAT-1SunBoth a and bHintMan-made satellites are FalconSAT-1, AISAT-1, etc. 21). Satellites are classified into ______ types.910812HintSatellites 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 _______.Global Positioning SystemGuide Position SystemGuide Posting SystemGlobal pointing SystemHintGPS stands for Global Positioning System. 23). GEOs stands for _______.Geostationary SatelliteGeo standing SatelliteGlobal stationary SatelliteNone of the aboveHintGEOs stands for Geostationary Satellite. 24). How many techniques are used for achieving multiple access?2345HintThere 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?It assigns a single user with a single channelIt minimizes crosstalk by using guard bandsNo user can share other users frequency band at a timeAll the aboveHintFrequency 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 _______.Frequency division duplexFrequency double divisionFrequency duplex divisionFrequency division doubleHintFDD technique in multiplexing stands for frequency division duplex. 27). Which of the following statement is true regarding the FDD satellite technique?It uses only upward channelIt uses only downward channelIt uses both upward channel and downward channelNone of the aboveHintFDD 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.Analog systemsDigital systemsBoth a and bNone of the aboveHintFDMA is used in analog systems. 29). Which of the following are the examples of FDMA?AMPSNMTRadiocomAll the aboveHintThe examples of FDMA are AMPS, NMT and Radiocom. 30). Is FDMA a continuous transmission scheme.YesNoDepends on the type of communicationHintYes, FDMA a continuous transmission scheme. 31). Which of the following are the examples of analog systems that FDMA is implemented?AMPSNMTRadiocom 2000All the aboveHintThe 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?It is easy to implementIt is a continuous transmission schemeLess complex schemeAll the aboveHintThe 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?FDMA higher cell siteIt uses duplexersIt requires tight RF filteringAll the aboveHintThe disadvantages of FDMA are it has a higher cell site, it uses duplexers and it requires tight RF filtering. 34). TWT stands for _______.Travelling wave tubeTransport wave tubeTravel waveguide tubeNone of the aboveHintTWT stands for Travelling wave tube. 35). Which of the following statement is true for satellite communication?It is a method to transport information from one place to another place via satelliteIt is a method to transmit wavesIt is a method to measure information between satellitesNone of the aboveHintSatellite communication is a method to transport information from one place to another place via satellite. 36). A communication satellite is a _______ satellite.Artificial satelliteNatural satelliteMan made satelliteEither a or cHintA communication satellite is an artificial satellite. 37). A communication satellite uses ______ to transmit signal.AntennaTransponderOscillatorNone of the aboveHintA communication satellite uses a transponder to transmit a signal. 38). Which of the following are the components in satellite communication?MixerTransponderFilterAll the aboveHintThe components in satellite communication are mixer, transponder, filter, amplifier, local oscillator, amplifier, multiplexers. 39). What is the maximum distance covered by satellite communication?1300 km1500 km1800 km1100 kmHintThe maximum distance covered by satellite communication is 1500km. 40). Which of the following are the main components in satellite communication?UplinkDownlinkTransponderAll the aboveHintThe main components in satellite communication are uplink, downlink, and transducer. 41). Which of the following is the function of a transponder?It boots incoming signalIt reduces the frequency of a signalIt adds noiseAll the aboveHintThe function of a transponder is to boots incoming signals and change their frequency. 42). INSAT stands for ________.Indian National SatelliteInternational SatelliteEither a or bNone of the aboveHintINSAT stands for Indian National Satellite. 43). How many transponders are present in an INSAT?100200250More than 200HintThere are more than 200 transponders are present in an INSAT. 44). Satellite communication services are classified into how many types?OneTwoThreeFourHintSatellite 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?It takes place between one or multiple earth stations via satelliteInformation is exchanged between two earth stationsBoth a and bNone of the aboveHintOne 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?It takes place between one or multiple earth stations via satelliteInformation is exchanged between two earth stationsBoth a and bNone of the aboveHintIn two-way satellite communication, information is exchanged between two earth stations. 47). Which of the following are the examples of one way satellite communication?RadioTracks space operation serviceInternet servicesAll the aboveHintExamples 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?Covers maximum bandwidthIt provides elasticity propertyReliabilityAll the aboveHintThe 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?It is a cost effective procedureIt may block frequenciesThere is a chance for signal interference.All the aboveHintThe 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?TVRadioMilitaryAll the aboveHintThe applications of satellite communications are TV, radio, military communication.Satellite Communication MCQs with Answers 51). Which of the following countries have their own satellites?IndiaJapanChinaAll the aboveHintThe countries that have their own satellites are India, China, Japan. 52). Which of the following is the own satellite of India?Rohini D1OhsumiDong Fang Hong IGSATHintIndia has its own satellite name “Rohini D1”. 53). Which of the following is the own satellite of China?Rohini D1OhsumiDong Fang Hong IGSATHintChina has its own satellite name” Dong Fang Hong I”. 54). Which of the following is the own satellite of Japan?Rohini D1OhsumiDong Fang Hong IGSATHintJapan 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 _______.Space stationOrbital spaceWork stationBoth a and bHintA 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?2346HintKepler supports satellite communication 3 laws. 57). Which of the following is true regarding Kepler's first law?It states that the sun is at the center, and other planets revolve around it in an elliptical mannerIt states that the area covered by satellites with respect to the center of the earth is equal, at regular intervals of time.It 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.Both b and cHintKepler'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?It states that the sun is at the center, and other planets revolve around it in an elliptical mannerIt states that the area covered by satellites with respect to the center of the earth is equal, at regular intervals of time.It 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.Both b and cHintKepler'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?It states that the sun is at the center, and other planets revolve around it in an elliptical mannerIt states that the area covered by satellites with respect to the center of the earth is equal, at regular intervals of time.It 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.Both b and cHintKepler'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?BandwidthPath loss that provides free lossAn isotropic antenna radiates power effectivelyAll the aboveHintThe 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?Bits/secondsMetersCentimetersBitsHintThe unit of data rate is bits/sec. 62). Which of the following are the units of Swath width?Bits/secondsMetersCentimetersBitsHintThe unit of Swath width is Meters. 63). Which of the following are the units of Across track pixel dimension?Bits/secondsMetersCentimetersBitsHintThe units of Across track pixel dimension is Meters. 64). Which of the following are the units of ground track velocity?Bits/secondsMeters/secondCentimetersBitsHintThe units of ground track velocity is Meters/second. 65). Which of the following are the units of along track pixel dimension?Bits/secondsMetersCentimetersBitsHintThe units of along-track pixel dimension in meters. 66). Which of the following are the units of bits/pixel?Bits/secondsMetersCentimetersBitsHintThe units of bits/pixel is bits. 67). Which of the following is true when the data rate is reduced?Duty cycles are increasedThere will be a change in amplitudeThere will be compression in dataAll the aboveHintWhen 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?3456HintThere are 4 types of orbits are present in satellite communication namely, GEO, MEO, LEO, HEO. 69). GEO stands for ______.Geostationary orbitGoogle stationary orbitGeo stand orbitNone of the aboveHintGeo stands for geostationary orbit. 70). MEO stands for _______.Medium earth orbitMedia earth orbitMass earth orbitNone of the aboveHintMEO stands for medium earth orbit. 71). LEO stands for ______.Low earth orbitLevel earth orbitLow equal orbitNone of the aboveHintLEO stands for Low earth orbit. 72). Do geosynchronous orbits have the same rotational velocity as earth?YesNoMaybeDepends on orbits positionHintYes, geosynchronous orbits do have the same rotational velocity as earth. 73). What is the velocity of geosynchronous orbit?11300 km/hr35000km/hr5690 km/hr31456 km/hrHintThe velocity of geosynchronous orbit is 11300 km/hr. 74). Which of the following orbit has equal lower altitude and higher velocity?Geosynchronous orbitAsynchronous orbitGeostationary orbitBoth a and bHintThe orbit that has equal lower altitude and higher velocity Asynchronous orbit.Satellite Communication Interview Questions & Answers 75). GEO is _______ km away from the earth.36000 km6000–20,000km500–1500 km1000 kmHintGEO is 36000 km away from earth. 76). MEO is _______ km away from the earth.36000 km6000 – 20,000km500 – 1500 km1000 kmHintMEO is 6000 – 20,000km away from earth. 77). LEO is ______ km away from the earth.36000 km6000 – 20,000km500 – 1500 km1000 kmHintLEO is 500 – 1500 km away from the earth. 78). Is geostationary not useful for global coverage?YesNoMaybeDepends on the position of orbitHintYes, geostationary is not useful for global coverage. 79). Does MEO requires fewer satellites?YesNoMaybeDepends on the distanceHintYes, MEO requires fewer satellites. 80). A MEO satellite distance gives ____ and ____ signal compared to LEO.Time delay, weakTime delay, strongHigh frequency, weakNone of the aboveHintAn MEO satellite distance gives time delay and weak signal compared to LEO. 81). Which of the following orbit is much close to earth?LEOGEOMEOBoth a and bHintLEO orbit is much close to earth than GEO. 82). Does LEO orbit requires routing?YesNoMaybeDependsHintYes, LEO orbit requires routing. Read more about Routing. 83). ISL stands for _______.Inter satellite linkIntermediate satellite linkInter stationary linkIntermediate stationary linkHintISL stands for intersatellite link. 84). GWL stands for _______.Gateway LinkGeo linkGraphic linkGateway lineHintGWL stands for Gateway Link. 85). UML stands for _______.User mobile linkUser multi linkUp mobile linkUser multi linkHintUML stands User mobile link. 86). Which of the following connects 2 satellites on different objects?ISLUMLGMLBoth a and bHintISL connects 2 satellites on different objects. 87). Which of the following are the algorithms used in satellite communication?MHA – minimum hops algorithmMCA – Minimum cost AlgorithmDijkstra shortest algorithmAll the aboveHintThe algorithms used in satellite communication MHA – minimum hops algorithm, MCA – Minimum cost Algorithm, Dijkstra shortest algorithm. 88). What is the altitude of geosynchronous orbit?35786 km35000km5690 km31456 kmHintThe altitude of geosynchronous orbit is 35786km. 89). PIM stands for ________.Pulse interval modulationPulse internet modulationPulse internal modeNone of the aboveHintPIM stands Pulse interval modulation. 90). Which of the following is an uplink satellite?A signal transmitted from earth station to satelliteSignal transmitted from a satellite to earth stationBoth a or bNone of the aboveHintIn an uplink satellite, a signal is transmitted from the earth station to the satellite. 91). Which of the following is a downlink satellite?A signal transmitted from earth station to satelliteSignal transmitted from the satellite to earth stationBoth a or bNone of the aboveHintIn a downlink satellite signal transmitted from the satellite to the earth station. 92). Simplex type transmission is observed in ______.TVRadioTelephoneAll the aboveHintSimplex type transmission is observed in TV. 93). Which of the following condition satisfies for an elliptical orbit?10<=e00HintThe condition that satisfies an elliptical orbit is 0<=e. 94). The point far from the earth is called ______.ApogeePerigeeLongitudeLatitudeHintThe point far from the earth is called Apogee. 95). The point close to earth is called _______.ApogeePerigeeLongitudeLatitudeHintThe point close to earth is called Perigee. 96). Which of the following technique is suitable for digital transmission?TDMAFDMACDMABoth a and bHintTDMA technique is suitable for digital transmission. 97). The signals that are transmitted and received are separated using _____.DiplexerDuplexerSimplexerBoth a and bHintThe signals that are transmitted and received are separated using diplexer. 98). The ratio between signal and noise power at the receiver is called ______.SNRBNRENRNone of the aboveHintThe ratio between signal and noise power at the receiver is called SNR – a signal to noise ratio. 99). Units of SNR is _______.dBMetersCentimetersHertzHintUnits of SNR is dB. 100). Is sky noise a type of antenna losses?YesNoMaybeHintYes, a sky noise is a type of antenna losses. 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