MCQ in Satellite Communications Part 6 | ECE Board Exam

This is the Multiples Choice Questions Part 6 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.

MCQ Topic Outline included in ECE Board Exam Syllabi

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

Continue Practice Exam Test Questions Part 6 of the Series

⇐ MCQ in Satellite Communications Part 5 | ECE Board Exam

Choose the letter of the best answer in each questions.

251. The first duplex satellite is

a. Moon

b. Sputnik 1

c. Telstar

d. Early Bird

252. The FDMA technique wherein voice band channels are assigned on “as needed” basis.

a. PAMA

b. DAMA

c. SSMA

d. CDMA

253. A form of CDMA where a digital code is used to continually change the frequency of the carrier.

a. Spread Spectrum

b. Frequency Hopping

c. Store and Forward

d. SPADE

254. The satellite frequency reuse method which sends different information signals using vertical or horizontal electromagnetic polarization.

a. Multiple coverage areas

b. Dual polarization

c. Spatial separation

d. Spread spectrum

255. A satellite communication link between Pinugay Earth Station, Philippines and Mt. Fucino Earth Station, Italy is to be established. If the assigned uplink frequency at Pinugay Earth Station is 6175 MHz, what is the downlink frequency at Mt. Fucino Earth Station, in MHz?

a. 4545

b. 3950

c. 3789

d. 4200

256. A satellite equipped with electronic devices to receive, amplify, convert and retransmit signals.

a. Passive

b. Active

c. Uplink

d. Downlink

257. “The orbit of any planet is an ellipse with the sun at one focus”. This is

a. Kepler’s First Law

b. Kepler’s Second Law

c. Kepler’s Third Law

d. Law of Universal Gravitation

258. The point in an satellite orbit which is farthest away from the earth

a. Perigee

b. Apogee

c. Azimuth

d. Ascending node

259. The first active satellite which transmitted telemetry information

a. Telstar 1

b. Aguila II

c. Palapa A 1

d. Sputnik

260. The portion of the satellite communication link involving the transmission of traffic from ground station to satellite.

a. Uplink

b. Lowlink

c. Paylink

d. Bus transmission

261. It is spacecraft places in orbit around the earth carrying on-board microwave receiving and transmitting equipment.

a. Communication satellite

b. Terrestrial link

c. Transponder

d. Microwave repeater

262. Satellite position has an/a ___________ angle with respect to the horizon.

a. Azimuth

b. Depression

c. Elevation

d. Critical

263. A satellite that revolves from North to South.

a. Equatorial

b. Polar

c. Orbital

d. Inclined

264. The Kepler’s Law which is also known as the Law of Areas.

a. First Law

b. Second Law

c. Third Law

d. None of the above

265. The satellite multiple access technique which uses the spread spectrum technology is

a. FDMA

b. TDMA

c. CDMA

d. DAMA

266. The point where the orbit crosses the equatorial plane going from South to North.

a. Ascending Node

b. Descending Node

c. Apogee

d. Perigee

267. The footprint which covers approximately one-third of the earth’s surface using a 17 degree beamwidth.

a. Spot coverage

b. Zonal coverage

c. Earth coverage

d. Regional coverage

268. An earth station transmits signal to a satellite 38,500 km., directly overhead it. What is the propagation delay when the signal is received back at the same earth station, in milliseconds.

a. 257

b. 200

c. 285

d. 185

269. When a satellite orbits in the opposite direction as the earth’s rotation with an angular velocity less than that of the earth.

a. Bus transmission

b. Payload

c. Prograde

d. Retrograde

270. The actual user information conveyed through the satellite system.

a. Bus transmission

b. Payload

c. Prograde

d. Retrograde

271. The spatial separation between geosynchronous satellites

a. 1 – 3 degrees

b. 3 – 6 degrees

c. 6 – 8 degrees

d. 8 – 10 degrees

272. _______________ detects the satellite signal relayed from the feed and converts it to an electric current, amplifies and lower its frequency.

a. Feedhorn

b. Satellite dish

c. Satellite receiver

d. LNB

273. What kind of battery panels are used in some advance satellites?

a. Gallium Arsenide solar panel

b. Silicon based panels

c. Germanium based panels

d. Gallium Phosphate solar panel

274. Footprint refers to coverage area in the globe

a. Satellite radiation polarization

b. Satellite navigation

c. Satellite radiation pattern

d. Satellite coverage

275. Satellite system or part of a satellite system, consisting of only one satellite and the operating earth station.

a. Satellite system

b. Satellite network

c. Space system

d. Multi-satellite link

276. Known to be the first satellite capable to receive and transmit simultaneously.

a. Syscom I

b. Echo I

c. Telstar I

d. Score

277. A satellite receives an uplink frequency of ____________ MHz from a ground station of 3700 MHz.

a. 8150 MHz

b. 1475 MHz

c. 2225 MHz

d. 5925 MHz

278. What band does VSAT first operate?

a. X-band

b. C-band

c. Ku-band

d. L-band

279. Satellite engine use

a. Liquid fuel

b. Jet propulsion

c. Ion propulsion system

d. Solar jet

280. The first passive satellite transponder

a. Early bird

b. Score

c. Moon

d. Sputnik

281. Satellite used for intercontinental communications are known as

a. Comsat

b. Domsat

c. Marisat

d. Intelsat

282. AsiaSat 1 covers how many countries in Asia?

a. 38

b. 40

c. 44

d. 42

283. An area on the surface of the earth within which the boresight of the steerable satellite beam intended to be pointed.

a. Equivalent boresight area

b. Contour boresight area

c. Coordination boresight area

d. Effective boresight area

284. Refers to the man-made body sent into continuous orbit around the earth, which provides propagation paths for radio waves between terrestrial transmitters and receivers.

a. Rocket

b. Allotter relay

c. Space shuttle

d. Communication satellite

285. What is the basic function of a communications satellite?

a. To act as a receiving antenna for broadcast FM

b. To compensate for the antenna limitations

c. To eliminate aerodynamic drag

d. To acts as receiving antenna for broadcast AM

286. Typical round-trip distance and transmission time for a satellite relay

a. About 300 ms and 90,000 km, respectively

b. 90,000 km and about 300 ms, respectively

c. 90,000 mi and about 100 ms, respectively

d. 90,000 mi and 300 ms, respectively

287. The figure of a satellite defines in orbit

a. Circle

b. Elliptical

c. Parabolic

d. Hyperbolic

288. Considered as the corrupting influence(s) in the satellite movement.

a. Gravitational pill between the earth and the orbiting satellite

b. Atmospheric drag on the satellite

c. Orbital ellipse

d. All of these

289. The orbit of communications satellites id defined by the angle with respect to the earth equator, which is the 0o plane. What is (are) the basic orbital angle(s)?

a. Polar

b. Inclined

c. Equatorial

d. All of the above

290. How do we measure the position of a satellite?

a. By its elevation angle with respect to the horizon

b. By its azimuth angle measured clockwise from the direction of true north

c. Through the line of apsides

d. A and B are correct

291. Which of the following cause(s) the satellite’s orbital distortions?

a. Sun

b. Earth

c. Moon

d. All of the above

292. What is the approximate service life of communications satellites?

a. 3 years only

b. 5 to 20 years

c. 20 to 60 years

d. 100 years

293. Representing application of the extraordinary advances technology of satellites to solve the problem of accurate, reliable, 26 hr/day navigation.

a. Global Positioning System (GPS)

b. Navigation System using Timing and Ranging (NAVSTAR)

c. LORAN

d. A and B are correct

294. A system based on the accurate knowledge by the vessel of the position of each of four satellites, as calculated by the time with respect to the user.

a. GPS

b. A or D

c. LORAN

d. NAVSTAR

295. Segment(s) of a complete GPS system is(are)

a. Control segment

b. Space segment

c. User segment

d. All of these

296. Its function assures the overall system performance and accuracy

a. Control segment

b. Space segment

c. User segment

d. All of these

297. The user segment is used to received signals for the GPS system from the four satellites, compute the time differences, and determine position, while space segment’s function is(are)

a. To received signals for the GPS system from the four satellites, compute the distance differences, and determine position

b. To transmit time codes and orbital position information to the users

c. To assure the overall performance and accuracy

d. All of the above

298. How do you describe the complete signal path of the satellite communications operation?

a. Begins at a ground station, proceeds to an uplink, then to a downlink, and ends at a receiving ground station.

b. From the satellite, to a downlink, then to a ground station.

c. Begins at a ground station, proceeds to an uplink, to the satellite itself, to a downlink, and ends at a receiving ground station

d. All of these

299. What is a passive 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. A or C

300. How does communication between satellite be achieved

a. Using satellite cross-links

b. Intersatellite links (ISLs)

c. Through is ground stations

d. A or B is correct

Questions and Answers in Satellite Communications Series

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

Complete List of MCQ in Communications Engineering per topic