MCQs in Satellite Communications Part V

(Last Updated On: December 8, 2017)

MCQs in Satellite Communications - Part V

This is the Multiples Choice Questions Part 5 of the Series in Satellite Communications as one of the Communications Engineering topic. In Preparation for the ECE Board Exam make sure to expose yourself and familiarize in each and every questions compiled here taken from various sources including but not limited to past Board Examination Questions in Electronic System and Technologies, Communications Books, Journals and other Communications References.

Online Questions and Answers Topic Outline

  • MCQs in Satellite System
  • MCQs in Types of Satellite
  • MCQs in Satellite Orbit
  • MCQs in Uplink considerations
  • MCQs in Demand Assignments Multiple Access
  • MCQs in Antenna Tracking
  • MCQs in Satellite Link Budgets
  • MCQs in Satellite Path Loss
  • MCQs in Satellite Figure of Merit
  • MCQs in Ratio of Carrier to thermal Noise Power
  • MCQs in Station Margin
  • MCQs in VSAT

MCQs in Satellite Communications Series

Following is the list of multiple choice questions in this brand new series:

Satellite Communications MCQs
PART 1: MCQs from Number 1 – 50                        Answer key: PART I
PART 2: MCQs from Number 51 – 100                   Answer key: PART II
PART 3: MCQs from Number 101 – 150                 Answer key: PART III
PART 4: MCQs from Number 151 – 200                 Answer key: PART IV
PART 5: MCQs from Number 201 – 250                 Answer key: PART V
PART 6: MCQs from Number 251 – 300                 Answer key: PART VI
PART 7: MCQs from Number 301 – 350                 Answer key: PART VII

Continue Practice Exam Test Questions Part V of the Series

201. Navstar GPS satellite grouping capable of detecting certain error conditions, then automatically transmitting a coded message indicating that it is out of service.

  • A. Block I
  • B. Block IIa
  • C. Block II
  • D. Block IIR

202. Galileo Satellites has a lifespan of ____.

  • A. greater than 12 years
  • B. greater than 15 years
  • C. greater than  20 years
  • D. greater than  25 years

203. The height of a satellite in a synchronous equatorial orbit is

  • A. 100 mi
  • B. 6800 mi
  • C. 22,300 mi
  • D. 35,860 mi

204. An orbit that is 36,000 km away from the geocenter of the earth is called

  • A. Geosynchronous orbit
  • B. Clarke orbit
  • C. Clarke belt
  • D. Any of these

205. The main function of a communications satellite is as

  • A. Repeater
  • B. Reflector
  • C. Beacon
  • D. Observation platform

206. Navstar GPS grouping intended to be used only for self testing.

  • A. Block I
  • B. Block III
  • C. Block II
  • D. Block IIR

207. It is the direction of maximum gain of the earth station antenna

  • A. Footprint
  • B. Boresight
  • C. Angle of elevation
  • D. Angle of azimuth

208. A circular orbit around the equator with 24-h period is called

  • A. Elliptical orbit
  • B. Geostationary orbit
  • C. Polar orbit
  • D. Transfer orbit

209. A classification of satellite that uses the angular momentum of its spinning body to provide roll and yaw stabilization.

  • A. Roll stabilizer satellite
  • B. Yaw stabilizer satellite
  • C. Spinner stabilizer satellite
  • D. Three-axis stabilizer satellite

210. Most satellites operate in which frequency band?

  • A. 30 to 300 MHz
  • B. 300 MHz to 3 GHz
  • C. 3 to 30 GHz
  • D. Above 300 GHz

11. The method of assigning adjacent channels different electromagnetic polarization is called

  • A. Frequency reuse
  • B. Polarization
  • C. Multi-accessing
  • D. Interference

212. It implies that more than one user has an access to one or more radio channels

  • A. Co-channel interference
  • B. Satellite multi-accessing
  • C. Frequency reuse
  • D. Diversity

213. The main power sources for a satellite are

  • A. Batteries
  • B. Solar cells
  • C. Fuel cells
  • D. Thermoelectric generators

214. A type of satellite’s multiple-accessing method that allows all users continuous and equal access of the entire transponder bandwidth by assigning carrier frequencies on a temporary basis using statistical assignment process.

  • A. TDMA
  • B. FDMA
  • C. DAMA
  • D. CDMA

215. Batteries are used to power all satellite subsystems

  • A. All the time
  • B. Only during emergencies
  • C. During eclipse periods
  • D. To give the solar arrays a rest

216. The highly accurate timing clocks onboard the GPS satellite.

  • A. Plutonium clocks
  • B. Cesium atomic clocks
  • C. Hydrogen clocks
  • D. Fossil clocks

217. It is defined as the art or science of plotting, ascertaining, or directing the course of movement.

  • A. Ranging
  • B. Detection
  • C. Navigation
  • D. Driving

218. Galileo satellite system is positioned in ____.

  • A. 5 circular orbits
  • B. 3 circular orbits
  • C. 2 circular orbits
  • D. 6 circular orbits

219. The maximum height of an elliptical orbit is called the

  • A. Perigee
  • B. Apex
  • C. Zenith
  • D. Apogee

220. The most ancient and rudimentary method of navigation is ____.

  • A. Wandering
  • B. Celestial navigation
  • C. Piloting
  • D. Radio navigation

221. The jet thrusters are usually fired to

  • A. Main attitude
  • B. Put the satellite into transfer orbit
  • C. Inject the satellite into the geosynchronous orbit
  • D. Bring the satellite back to earth

222. A method of navigation where direction and distance are determined from precisely timed sightings of celestial bodies, including the stars and the moon.

  • A. Electronic navigation
  • B. Heavenly navigation
  • C. Radio navigation
  • D. Celestial navigation

223. Navstar satellite takes approximately ____ hours to orbit Earth.

  • A. 20
  • B. 6
  • C. 12
  • D. 18

224. A method of navigation where it fixes a position or direction with respect to familiar, significant landmarks such as railroad tracks, water towers, barns, mountain peaks and bodies or water.

  • A. Dead reckoning
  • B. Radio navigation
  • C. Wandering
  • D. Piloting

225. How can multiple earth stations share a satellite on the same frequencies?

  • A. Frequency reuse
  • B. Multiplexing
  • C. Mixing
  • D. They can’t

226. A navigation technique that determines position by extrapolating a series of measured velocity increments.

  • A. Piloting
  • B. Wandering
  • C. Radio navigation
  • D. Dead reckoning

227. A geostationary satellite

  • A. Is motionless in space (except for its gain)
  • B. Is not really stationary at all, but orbits the Earth within a 24-hr period
  • C. Appears stationary over the Earth’s magnetic pole
  • D. Is located at a height of 35,800 km to ensure global coverage

228. The average elevation of Navstar GPS satellite is ____ statue miles above the Earth.

  • A. 6724
  • B. 7689
  • C. 5978
  • D. 9476

229. Most commercial satellite activity occurs in which band(s)

  • A. L
  • B. C and Ku
  • C. X
  • D. S and P

230. Indicate the correct statement regarding satellite communications

  • A. If two earth stations do not face a common satellite, they should communicate via a double-satellite hop.
  • B. Satellites are allocated so that it is impossible for two earth stations not to face the same satellite.
  • C. Collocated earth stations are used for frequency diversity.
  • D. Satellite earth station must have as many receive chains as there are carriers transmitted to it.

231. Satellite used for intercontinental communications are known as

  • A. Comsat
  • B. Domsat
  • C. Marisat
  • D. Intelsat

232. Identical telephone numbers in different parts of the country are distinguished by their

  • A. Language digits
  • B. Access digits
  • C. Area codes
  • D. Central office codes

233. The GPS satellites has an angle of elevation at the ascending node of ____ with respect to the equatorial plane.

  • A. 30 degrees
  • B. 55 degrees
  • C. 50 degrees
  • D. 45 degrees

234. Telephone traffic is measured

  • A. With echo cancellers
  • B. By the relative congestion
  • C. In terms of the grade of service
  • D. In erlangs

235. Indicate which of the following is not a submarine cable

  • A. TAT-7
  • D. CANTAT 2

236. The typical bandwidth of a satellite band is

  • A. 36 MHz
  • B. 40 MHz
  • C. 70 MHz
  • D. 500 MHz

237. The operational satellites of Navstar GPS are revolving around Earth in orbital planes are approximately ____ degrees apart with ____ satellites in each plane.

  • A. 60, 4
  • B. 30, 5
  • C. 50, 5
  • D. 40, 3

238. Indicate which of the following is an American domsat system


239. Which of the following is not usually a part of a transponder?

  • A. LNA
  • B. Mixer
  • C. Modulator
  • D. HPA

240. Who is the oldest man in space?

  • A. John Glenn
  • B. Neil Armstrong
  • C. Yuri Gagarin
  • D. Edwin Aldrin

241. It refers to the satellite orientation with respect to the earth.

  • A. Satellite’s attitude
  • B. Satellite position
  • C. Satellite location
  • D. Satellite orbit

242. Precise positioning service has time transfer accuracy to UTC within

  • A. 100 nanoseconds
  • B. 300 nanoseconds
  • C. 200 nanoseconds
  • D. 400 nanoseconds

243. The fully deployed Galileo satellite system consists of ____ satellites.

  • A. 27 operational + 3 active spares
  • B. 26 operational + 4 active spares
  • C. 28 operational + 2 active spares
  • D. 25 operational + 5 active spares

244. Galileo satellite is ____.

  • A. Medium Earth Orbit (MEO)
  • B. Low Earth Orbit (LEO)
  • C. Geosynchronous Earth Orbit (GEO)
  • D. Highly Elliptical Orbit (HEO)

245. Galileo satellites are at circular planes at ____ altitude above Earth.

  • A. 23,500 mi
  • B. 36,500 km
  • C. 35,800 mi
  • D. 23,222 km

246. Galileo satellites are inclined at the orbital planes of ____ with reference to the equatorial plane.

  • A. 64 degrees
  • B. 17 degrees
  • C. 56 degrees
  • D. 34 degrees

247. Which of the following refers to a delayed repeater satellite?

  • a. A satellite capable of receiving, amplifying, and retransmitting information to and from earth stations.
  • b. A bent-pipe or a reflector which bounces a signal from one place to another.
  • c. A satellite which receives transmissions from earth stations, stored them on magnetic tape, and rebroadcast them to ground stations farther along in its orbit.
  • d. All of these

248. Satellite orbiting in the same direction as earth’s rotation and at an angular velocity greater than the earth is called prograde orbit; and a satellite orbiting which is in the opposite direction as Earth’s rotation or in the same direction but at an angular velocity less than that of Earth is known as

  • a. Haley’s orbit
  • b. Elliptical orbit
  • c. Equatorial orbit
  • d. Retrograde orbit

249. Are satellites that orbit in a circular pattern with an angular velocity equal to that of earth.

  • a. Geostationary or geosynchronous satellite
  • b. Nonsynchronous satellite
  • c. Orbital satellites
  • d. B or C is correct

250. What do you call of a satellite used to provide satellite services within a single country?

  • a. Orbital satellite
  • b. Geostationary satellite
  • c. Nonsynchronous satellite
  • d. Domestic satellite or domsat

Complete List of MCQs in Communications Engineering per topic

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