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:
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
- B. INTELSAT V
- C. ATLANTIS
- 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
- A. INTELSAT
- B. TELSTAR
- C. COMSAT
- D. INMARSAT
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
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