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 VI of the Series
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 assigneduplink 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, tehn 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
Post a Comment
EmoticonClick to see the code!
To insert emoticon you must added at least one space before the code.