SATELLITE COMMUNICATION MCQ 2

SATELLITE COMMUNICATION MCQ

 

1). Which of the following countries have their own satellites?

1. India
2. Japan
3. China
4. All the above

Answer :All the above

 2). Which of the following is the own satellite of India?

1. Rohini D1
2. Ohsumi
3. Dong Fang Hong I
4. GSAT

Answer :Rohini D1

 3). Which of the following is the own satellite of China?
Rohini D1OhsumiDong Fang Hong IGSATAnswer :Dong Fang Hong I

 4). Which of the following is the own satellite of Japan?
Rohini D1OhsumiDong Fang Hong IGSATAnswer :Ohsumi

 5). A spacecraft capable of supporting a human crew in orbit for an extended period of time is called _______.
Space stationOrbital spaceWork stationBoth a and bAnswer :Both a and b

 6). How many laws of Kepler supports satellite communication?
2346Answer :3

 7). 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 cAnswer :It states that the sun is at the center, and other planets revolve around it in an elliptical manner

 8). 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 cAnswer :It states that the area covered by satellites with respect to the center of the earth is equal, at regular intervals of time.

 9). 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 cAnswer :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.

10). 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 aboveAnswer :All the above

11). Which of the following are the units of data rate?
Bits/secondsMetersCentimetersBitsAnswer :Bits/seconds

12). Which of the following are the units of Swath width?
Bits/secondsMetersCentimetersBitsAnswer :Meters

13). Which of the following are the units of Across track pixel dimension?
Bits/secondsMetersCentimetersBitsAnswer :Meters

14). Which of the following are the units of ground track velocity?
Bits/secondsMeters/secondCentimetersBitsAnswer :Meters/second

15). Which of the following are the units of along track pixel dimension?
Bits/secondsMetersCentimetersBitsAnswer :Meters

16). Which of the following are the units of bits/pixel?
Bits/secondsMetersCentimetersBitsAnswer :Bits

17). 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 aboveAnswer :All the above

18). How many types of orbits are present in satellite communication?
3456Answer :4

19). GEO stands for ______.
Geostationary orbitGoogle stationary orbitGeo stand orbitNone of the aboveAnswer :Geostationary orbit

20). MEO stands for _______.
Medium earth orbitMedia earth orbitMass earth orbitNone of the aboveAnswer :Medium earth orbit

21). LEO stands for ______.
Low earth orbitLevel earth orbitLow equal orbitNone of the aboveAnswer :Low earth orbit

22). Do geosynchronous orbits have the same rotational velocity as earth?
YesNoMaybeDepends on orbits positionAnswer :Yes

23). What is the velocity of geosynchronous orbit?
11300 km/hr35000km/hr5690 km/hr31456 km/hrAnswer :11300 km/hr

24). Which of the following orbit has equal lower altitude and higher velocity?
Geosynchronous orbitAsynchronous orbitGeostationary orbitBoth a and bAnswer :Asynchronous orbit

25). GEO is _______ km away from the earth.
36000 km6000–20,000km500–1500 km1000 kmAnswer :36000 km

26). MEO is _______ km away from the earth.
36000 km6000 – 20,000km500 – 1500 km1000 kmAnswer :6000 – 20,000km

27). LEO is ______ km away from the earth.
36000 km6000 – 20,000km500 – 1500 km1000 kmAnswer :500 – 1500 km

28). Is geostationary not useful for global coverage?
YesNoMaybeDepends on the position of orbitAnswer :Yes

29). Does MEO requires fewer satellites?
YesNoMaybeDepends on the distanceAnswer :Yes

30). A MEO satellite distance gives ____ and ____ signal compared to LEO.
Time delay, weakTime delay, strongHigh frequency, weakNone of the aboveAnswer :Time delay, weak

31). Which of the following orbit is much close to earth?
LEOGEOMEOBoth a and bAnswer :LEO

32). Does LEO orbit requires routing?
YesNoMaybeDependsAnswer :Yes

33). ISL stands for _______.
Inter satellite linkIntermediate satellite linkInter stationary linkIntermediate stationary linkAnswer :Inter satellite link

34). GWL stands for _______.
Gateway LinkGeo linkGraphic linkGateway lineAnswer :Gateway Link

35). UML stands for _______.
User mobile linkUser multi linkUp mobile linkUser multi linkAnswer :User mobile link

36). Which of the following connects 2 satellites on different objects?
ISLUMLGMLBoth a and bAnswer :ISL

37). Which of the following are the algorithms used in satellite communication?
MHA – minimum hops algorithmMCA – Minimum cost AlgorithmDijkstra shortest algorithmAll the aboveAnswer :All the above

38). What is the altitude of geosynchronous orbit?
35786 km35000km5690 km31456 kmAnswer :35786 km

39). PIM stands for ________.
Pulse interval modulationPulse internet modulationPulse internal modeNone of the aboveAnswer :Pulse interval modulation

40). 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 aboveAnswer :A signal transmitted from earth station to satellite

41). 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 aboveAnswer :Signal transmitted from the satellite to earth station

42). Simplex type transmission is observed in ______.
TVRadioTelephoneAll the aboveAnswer :TV

 

44). The point far from the earth is called ______.
ApogeePerigeeLongitudeLatitudeAnswer :Apogee

45). The point close to earth is called _______.
ApogeePerigeeLongitudeLatitudeAnswer :Perigee

46). Which of the following technique is suitable for digital transmission?
TDMAFDMACDMABoth a and bAnswer :TDMA

47). The signals that are transmitted and received are separated using _____.
DiplexerDuplexerSimplexerBoth a and bAnswer :Diplexer

48). The ratio between signal and noise power at the receiver is called ______.
SNRBNRENRNone of the aboveAnswer :SNR

49). Units of SNR is _______.
dBMetersCentimetersHertzAnswer :dB

50). Is sky noise a type of antenna losses?
YesNoMaybeAnswer :Yes