Description : A satellite beam that covers almost 42.4% of the earths surface. A. Zone beam B. Hemispheric beam C. Spot beam D. Global beam
Last Answer : D. Global beam
Description : The smallest beam of a satellite antenna radiation pattern A. Zone beam B. Hemispheric beam C. Spot beam D. Global beam
Last Answer : C. Spot beam
Description : Which of the following refers to the smallest beam of a satellite antenna’s radiation pattern A. Global beam B. Spot beam C. Zone beam D. Hemispheric beam
Last Answer : B. Spot beam
Description : A satellite beam that covers almost 42.4% of earths surface. A. Spot beam B. Global beam C. Zone beam D. Hemispheric beam
Last Answer : B. Global beam
Description : Which of the following refers to the smallest beam of satellite antenna’s radiation pattern? A. Hemispheric beam B. Spot beam C. Zone beam D. Global beam
Description : In satellite communications, what means of attitude control is using the angular momentum of the spinning body to provide the roll and yaw stabilization? A. Spin stabilization B. Radial stabilization C. Three-axis stabilization D. Station keeping
Last Answer : A. Spin stabilization
Last Answer : COMSAT stands for Communications Satellite Corporation
Description : An area on the surface of the earth within which the bore sight of the steerable satellite beam intended to be pointed A. Effective boresight area B. Countour boresight are C. Coordination boresight are D. Equivalent boresight area
Last Answer : A. Effective boresight area
Description : One of the first satellite system catering personal based communications services scheduled for operation. A. Iridium system B. Plutonium system C. Indium system D. Gallium system
Last Answer : A. Iridium system
Description : What is the data rate in Mbps of a single satellite transponder considering an S/N of 30 dB? A. 35.8 B. 3.58 C. 358 D. 3580
Last Answer : C. 358
Description : What do you call the single booster installed on the antenna dish of satellite receiver? A. Low noise amplifier B. Single amplifier C. Noise amplifier D. Rectifier
Last Answer : A. Low noise amplifier
Description : In location planning, environmental regulations, cost a , cost and availability of utilities, and taxes are a. global factors b. country factors country factors c. regional/community factors d. site-related factors e. none of the above
Last Answer : c. regional/community factors
Description : A communication network which is used by large organizations over regional, national or global area is called (1) LAN (2) WAN (3) MAN (4) VAN
Last Answer : WAN
Description : A global - as opposed to international - strategy involves: a) a wide variety of business strategies across countries. b) a single strategy for a subsidiary of a multinational firm. c) ... and partners. d) a wide variety of subsidiary strategies within the global network of subsidiaries
Last Answer : a single strategy for the entire global network of subsidiaries and partners.
Description : Which does not use vertical polarization antenna? A. AM Broadcasting B. FM Broadcasting C. Mobile Communications D. Satellite Communications
Last Answer : B. FM Broadcasting
Description : Descending pass for a satellite means a pass from A. North to South B. South to North C. East to West D. West to East
Last Answer : A. North to South
Description : Which of the following is the most common application of satellite? A. Surveillance B. Military application C. Communications D. Newscasting
Last Answer : C. Communications
Description : What is the free space attenuation of a satellite communications system operating at 36,000 km above the earth at 5.0 GHz? A. 198 dB B. 202 dB C. 142 dB D. 138 dB
Last Answer : A. 198 dB
Description : What is the propagation delay when a signal is transmitter by an earth station to a geosynchronous satellite about 38,500 km above earth’s equator and then received by the same earth station? A. 256 msec B. 128 msec C. 300 msec D. 400 msec
Last Answer : A. 256 msec
Description : When the elevation angle of a geostationary satellite is 23˚ and the transmitting frequency is 3840 MHz, what is the free space loss in dB? A. 196 dB B. 200 dB C. 150 dB D. 100 dB
Last Answer : A. 196 dB
Description : The first satellite launched for a geosynchronous orbit but unfortunately lost during orbit injection A. Syncom I B. Telstar I C. Sputnik I D. Early Bird I
Last Answer : A. Syncom I
Description : The first intelsat satellite that was launched in 1965 was named A. Early Bird I B. Echo C. Telstar I D. Courier
Last Answer : A. Early Bird I
Description : Refers to the satellite orientation with respect to the earth A. Satellite altitude B. Satellite position C. Satellite location D. Satellite orbit
Last Answer : A. Satellite altitude
Description : The control routine necessary to keep the satellite in position is referred to as A. station keeping B. station tracking C. station monitoring D. station maintaining
Last Answer : A. station keeping
Description : When the satellite are spaced 4˚ of the 360˚ complete circle, how many parking spaces or orbit slots are available? A. 90 B. 85 C. 95 D. 80
Last Answer : A. 90
Description : incidentally propose the geostationary scheme or orbit of the satellite in 1940s A. Arthur Clarke B. Carl Friedrich Gauss C. Samuel Morse D. Stephen Gray
Last Answer : A. Arthur Clarke
Description : The ________ angle measures the satellite position clockwise from the direction of true north. A. azimuth B. elevation C. depression D. critical
Last Answer : A. azimuth
Description : A satellite position is measured by its __________ angle with respect to the horizon. A. elevation B. depression C. azimuth D. critical
Last Answer : A. elevation
Description : The signal path from satellite to earth-based receiver. A. Downlink signal B. Uplink signal C. Incident signal D. Reflected signal
Last Answer : A. Downlink signal
Description : Designed to receive a signal from a transmitting station on the ground and retransmit it to a receiving station located elsewhere A. Communication satellite B. Repeater C. Relay station D. Transponder
Last Answer : A. Communication satellite
Description : The signal path from earth station satellite A. Uplink signal B. Reflected signal C. Incident signal D. Downlink signal
Last Answer : A. Uplink signal
Description : The round-trip propagation delay between two earth stations through a geosynchronous satellite is A. 500 to 600 ms B. 300 to 400 ms C. 600 to 700 ms D. 400 to 500 ms
Last Answer : A. 500 to 600 ms
Description : Satellite the orbits in a circular pattern with an angular velocity equal to that of the earth A. Geostationary B. Early Bird I C. Syncorn I D. Stationary satellite
Last Answer : A. Geostationary
Description : Essentially a satellite ___________ is a radio repeater in the sky A. transponder B. comparator C. duplexer D. billboard
Last Answer : A. transponder
Description : A satellite which simply reflects the signal without further amplification A. Passive satellite B. Active satellite C. Geostationary satellite D. Domestic satellite
Last Answer : A. Passive satellite
Description : The maximum propagation delay of a geostationary satellite is A. 278 ms B. 239 ms C. 300 ms D. 250 ms
Last Answer : A. 278 ms
Description : 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
Last Answer : B. latitude and longitude
Description : The HPAs in most satellite are A. TWTs B. Klystrons C. Vacuum tubes D. Magnetrons
Last Answer : A. TWTs
Description : The satellite communications channels in a transponder are defined by the A. LNA B. bandpass filter C. mixer D. input signals
Last Answer : B. bandpass filter
Description : What is the typical bandwidth of a satellite band? A. 36 MHz B. 40 MHz C. 70 MHz D. 500 MHz
Last Answer : D. 500 MHz
Description : How can multiple earth stations share a satellite on the same frequencies? A. Frequency reuse B. Multiplexing C. Mixing D. Frequency hopping
Last Answer : A. Frequency reuse
Description : Most commercial satellite activity occurs in which band(s)? A. L B. C and Ku C. X D. S and P
Last Answer : B. C and Ku
Description : The jet thrusters are usually fired to A. maintain altitude B. put the satellite into the transfer orbit C. inject the satellite in the geosynchronous orbit D. bring the satellite back to earth.
Last Answer : A. maintain altitude
Description : What is the basic technique used to stabilize a satellite? A. Gravity-forward motion balance B. Spin C. Thruster control D. Solar panel orientation 62. The jet thrusters are usually
Last Answer : B. Spin
Description : The satellite subsystem that monitors and controls the satellite is the A. propulsion subsystem B. power subsystem C. communications subsystem D. telemetry, tracking, and command subsystem
Last Answer : D. telemetry, tracking, and command subsystem
Description : Batteries are used to power all satellite subsystems A. at all times B. only during emergencies C. during eclipse periods D. to give the solar arrays a rest
Last Answer : C. during eclipse periods
Description : The main power sources for a satellite are A. batteries B. solar cells C. fuel cells D. thermoelectric generators 58. The maximum height of an ellip
Last Answer : B. solar cells
Description : What is the height of a satellite in a synchronous equatorial orbit? A. 42000 mi B. 6800 mi C. 22,300 mi D. 35,860 mi
Last Answer : C. 22,300 mi
Description : A satellite stay in orbit because the following two factors are balanced A. Satellite weight and speed B. Gravitational force and centrifugal force C. Centripetal force and speed D. Satellite weight and the pull of the moon and sun
Last Answer : B. Gravitational force and centrifugal force
Description : The key electronic component in a communications satellite is the A. telemetry equipment B. on-board computer C. command and control system D. transponder
Last Answer : D. transponder