# MCQs in Satellite Communications Part IV

(Last Updated On: December 8, 2017) This is the Multiples Choice Questions Part 4 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 IV of the Series

151. A common up-converter and down-converter IF in satellite communications is

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

152. It is the angle between the earth’s equatorial plane and the orbital plane of the satellite measured counterclockwise.

• A. Angle of elevation
• B. Angle of azimuth
• C. Angle of inclination
• D. Angle of tetrahedron

153. Which of the following types of HPA is not used in earth stations?

• A. TWT
• B. Klystron
• C. Transistors
• D. Magnetron

154. Galileo satellite’s mass is ____.

• A. 880 kg
• B. 675 kg
• C. 900 kg
• D. 540 kg

155. The point where a polar or inclined orbit crosses the equatorial plane traveling from north to south

• A. Ascending node
• B. Line of nodes
• C. Descending node
• D. Diagonal nodes

156. The receive GCE system in an earth station performs what function/s

• A. Modulation and multiplexing
• B. Up conversion
• C. Demodulation and demultiplexing
• D. Down conversion

157. The term generally associated with the table showing the position of a heavenly body on the number of dates in a regular sequence.

• A. Astronomical almanac
• B. Smith
• C. Ephemeris
• D. Space reporting

158. The point where a polar or inclined orbit crosses the equatorial plane traveling from south to north.

• A. Ascending node
• B. Descending node
• C. Diagonal node
• D. Inclined node

159. The line joining the ascending and descending node is called ____.

• A. Line of apsides
• B. Line of nodes
• C. Line of shoot
• D. Any of these

160. When the satellite rotates in an orbit directly above the equator, usually in circular pattern. This type of orbit is called ____.

• A. Polar orbit
• B. Synchronous orbit
• C. Geosynchronous satellite
• D. Equatorial orbit

161. The Navstar GPS satellite system was declared fully operational as of ____.

• A. April 17, 1995
• B. April 24, 1995
• C. April 27, 1995
• D. April 10, 1995

162. The HPAs in most satellites are

• A. TWTs
• B. Vacuum tubes
• C. Klystrons
• D. Magnetrons

163. The physical location of a satellite is determined by its

• A. Distance from the earth
• B. Latitude and longitude
• C. Reference to the stars
• D. Position relative to the sun

164. When the satellite rotates in a path that takes it over the north and south poles in an orbit perpendicular to the equatorial plane. This type of orbit is called ____.

• A. Inclined orbit
• B. Polar orbit
• C. Geosynchronous orbit
• D. Diagonal orbit

165. The azimuth angles and the angle of elevation is collectively known as ____.

• A. Antennas look angles
• B. Antennas see angles
• C. Antennas keep angles
• D. Antennas satellite angles

166. The point on the surface of the Earth directly below the satellite.

• A. Satellite point
• B. Latitude
• C. Longitude
• D. Subsatellite point

167. It is the vertical angle formed between the direction of travel of an electromagnetic wave radiated from an earth station antenna pointing directly toward a satellite and the horizontal plane.

• A. Angle of depression
• B. Angle of inclination
• C. Angle of elevation
• D. Angle of azimuth

168. The unique number used to encrypt the signal from that of the GPS satellite.

• A. SV
• B. UV
• C. PRN
• D. ESN

169. The minimum acceptable angle of elevation

• A. 6 degrees
• B. 4 degrees
• C. 5 degrees
• D. 7 degrees

170. It is the horizontal angular distance from a reference direction either the southern or northern most point of the horizon.

• A. Angle of elevation
• B. Latitude
• C. Longitude
• D. Azimuth

171. It is defined as the horizontal pointing angle of an earth station antenna.

• A. Angle of inclination
• B. Azimuth angle
• C. Latitude
• D. Longitude

172. Determines the farthest satellite away that can be seen looking east or west of the earth station’s longitude

• A. Radio horizon
• B. Optical horizon
• C. Terrestrial limits
• D. Limits of visibility

173. The spatial separation of a satellite is between ____.

• A. 3 to 6 degrees
• B. 1 to 2 degrees
• C. 5 to 8 degrees
• D. 8 to 16 degrees

174. The geographical representation of a satellite antenna’s radiation pattern is called a ____.

• A. Field intensity
• B. Footprint
• C. Radiation propagation
• D. Polarization

175. The GPS satellite identification which is assigned according to the order of the vehicle’s launch.

• A. SV
• B. EV
• C. PRN
• D. ESN

176. The smallest beam of a satellite that concentrates their power to very small geographical areas.

• A. Hemispherical beam
• B. Global beam
• C. Spot beam
• D. Any of these

177. Satellite’s radiation pattern that typically target up to 20% of the Earth’s surface.

• A. Hemispherical beam
• B. Global beam
• C. Spot beam
• D. Any of these

178. The key electronic component in a communications satellite is the

• A. Telemetry
• B. Command and Control system
• C. On-board computer
• D. Transponder

179. The radiation pattern that has a satellite’s antenna beamwidth of 17 degrees and are capable of covering approximately 42% of the earth’s surface.

• A. Hemispherical beam
• B. Earth beam
• C. Spot beam
• D. Any of these

180. The first active satellite

• A. Moon
• B. Sputnik I
• C. Score
• D. Echo

181. Sputnik I transmitted telemetry information for

• A. 1 week
• B. 21 days
• C. 15 days
• D. 30 days

182. The US counterpart of Sputnik I

• A. Syncom
• B. Telstar
• C. Echo
• D. Explorer I

183. Explorer I lasted for ____.

• A. 5 months
• B. 6 months
• C. 12 months
• D. 2 months

184. Navstar GPS satellite grouping that can operate continuously for 180 days between uploads from the ground.

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

185. It was the first artificial satellite used for relaying terrestrial communications

• A. Score
• B. Explorer I
• C. Sputnik I
• D. Syncom I

186. Which of the following satellite rebroadcast President Eisenhower’s 1958 Christmas message?

• A. Telstar I
• B. Telstar II
• C. Echo
• D. Score

187. The satellite or space segment of Navstar GPS is consist of ____ operational satellites.

• A. 30
• B. 24
• C. 14
• D. 20

188. It was the first satellite to accomplish transatlantic transmission.

• A. Courier
• B. Echo
• C. Telstar
• D. Syncom

189. It is the first transponder-type satellite

• A. Telstar I
• B. Sputnik I
• C. Syncom
• D. Courier

190. The first active satellite to simultaneously receive and transmit radio signals.

• A. Telstar I
• B. Telstar II
• C. Intelsat
• D. Syncom

191. The satellite communications channel in a transponder are defined by the

• A. LNA
• B. Bandpass filter
• C. Mixer
• D. Input signals

192. The satellite that was damaged by radiation from a newly discovered Van Allen Belts and consequently lasted for two weeks.

• A. Telstar I
• B. Telstar II
• C. Intelsat
• D. Syncom

193. As the height of a satellite orbit gets lower, the speed of the satellite

• A. Increases
• B. Decreases
• C. Remains the same
• D. None of the above

194. The satellite that was lost in space in its first attempt to place it in a geosynchronous orbit.

• A. Syncom I
• B. Telstar I
• C. Telstar II
• D. Courier

195. Intelsat I which was the first commercial telecommunications satellite is called ____.

• A. Domsat
• B. Molniya
• C. Early bird
• D. Courier

196. Block II Navstar GPS satellites can operate for approximately ____ between the receiving updates and corrections from the control segment of the system.

• A. 5.5 days
• B. 3.5 days
• C. 6 days
• D. 7 days

197. The angle of inclination of a satellite in polar orbit is nearly ____.

• A. 45 degrees
• B. 90 degrees
• C. 30 degrees
• D. 60 degrees

198. It is the time it takes earth to rotate back to the same constellation

• A. Revolution
• B. Rotation
• C. Sidereal period
• D. Year

199. Satellites with orbital pattern like Molniya are sometimes classified as

• A. LEO
• B. MEO
• C. GEO
• D. HEO

200. The process of maneuvering a satellite within a preassigned window is called

• A. Satellite keeping
• B. Station controlling
• C. Station keeping
• D. Satellite controlling

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