Description : The executive branch of government in charge of policy making in the telecommunications. A. National telecommunications commission B. Telecommunications control bureau C. Department of transportation and communications D. Bureau of telecommunications
Last Answer : C. Department of transportation and communications
Description : It is proposed network designed by major telephone companies in conjunction with the ITU-T with the intent of providing worldwide telecommunications support for voice, data, video and facsimile information within the same networ
Last Answer : ISDN
Description : Which of the following is not a common microwave application? A. Radar B. Data transmission C. Space communications D. Mobile radio
Last Answer : D. Mobile radio
Description : Rules governing the transmission of digital information. A. Line protocol B. Isochronous C. Data communications D. Digital communications
Last Answer : B. Isochronous
Description : RS-232, RS-449, RS-530, V, 24 and X.21 are examples of ____________. A. standards for interfaces between modems and transmission facilities B. standards for various types of ... for interfaces between terminals and modems D. standards for end to end performance of data communications system
Last Answer : C. standards for interfaces between terminals and modems
Description : ECE Board Exam March 1996 One type of pulse communications system uses pulse that appear as a group, and which vary in number according to the loudness of the voice. This type of ... A. pulse duration modulation B. pulse amplitude modulation C. pulse code modulation D. pulse position modulation
Last Answer : A. pulse duration modulation
Description : Determine from the following the basic mode of transmission system in the public data network in which data are transferred from the source to the network and from the network to the destination in the frame format. A. Voice mode B. Asynchronous mode C. Synchronous mode D. Packet mode
Last Answer : D. Packet mode
Description : INTELSAT stands for A. Intel Satellite B. International Telephone Satellite C. International Telecommunications Satellite D. International Satellite
Last Answer : C. International Telecommunications Satellite
Description : The owner of AsiaSat 2 is A. Asia Satellite Telecommunications Company (ASTC) B. Japan Satellite System (JSAT) C. China Great Wall Industry Corporation D. Singapore Satellite Commision
Last Answer : C. China Great Wall Industry Corporation
Description : In regulation of public telecommunications carrier such as in the evaluation of new entrant, the following consideration shall be given emphasis to _______. A. Legal, technical and citizenship B. ... and kind of service C. Citizenship, capacity and financial D. Technical, legal and financial
Last Answer : D. Technical, legal and financial
Description : Any governmental office responsible in discharging the obligations undertaken in the convention of the ITU and the regulation. A. Administration B. The union C. Country D. Telecommunications office
Last Answer : A. Administration
Description : Which of the following statement is incorrect? a. The difference between synchronous and asynchronous transmission is the clocking derived from the data in synchronous transmission. b. Half ... in online activities d. Batch processing is the prefered processing mode for telecommunication operation.
Last Answer : Batch processing is the prefered processing mode for telecommunication operation.
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
Description : Iridium satellites can provide data communications of up ____ bps data rate. A. 1200 B. 4800 C. 2400 D. 3840
Last Answer : C. 2400
Description : What satellite subsystem monitors onboard conditions such as temperature and battery voltage and transmits this data back to a ground station for analysis? A. Communications subsystem B. AKM C. TTC D. Transponder
Last Answer : C. TTC
Description : In what form does the information of data communications is transmitted between two points? A. Alphanumeric form B. Alphabetic form C. Numeric form D. Binary form
Last Answer : D. Binary form
Description : The primary purpose of the data modem is to A. interface analog terminal equipment to analog communications channel B. interface digital terminal equipment to analog communications ... to digital communications channel D. interface digital terminal equipment to digital communications channel
Last Answer : B. interface digital terminal equipment to analog communications channel
Description : The line control unit (LCU) operates on the data digital form. A. Data communications equipment (DCE) B. UART C. Modem D. Data terminal equipment (DTE)
Last Answer : D. Data terminal equipment (DTE)
Description : What type of modulation is used on voice and video signals? A. AM B. FM C. SSB D. QPSK
Last Answer : B. FM
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
Description : Which of the following is the basic component of a communications satellite receiver? A. On-board computer B. Reflector C. Telemetry D. Transponder
Last Answer : D. Transponder
Description : Have you worked in call centre/ telecommunications and now have problems with your hearing?
Last Answer : I worked at a call center while I was in highschool, and I can relate to the headache after leaving work…. but fortunately I never had trouble with my ears or hearing that seemed related to my job.
Description : ______ cable is used for voice and data communications. A) Coaxial B) Fiber-optic C) Twisted-pair D) none of the above
Last Answer : Twisted-pair
Description : ……….cable is used for voice and data communications. a. Twisted-pair b. None of These c. Coaxial d. Fiber-optic
Last Answer : a. Twisted-pair
Description : Readability 2 means that your transmission is: a. Readable but with difficulty b. Readable c. Readable now and then d. Two way communications have been established
Last Answer : c. Readable now and then
Description : What is the data link protocol that is used in asynchronous transmission for transferring files from one computer to another? A. A modem B. X modem C. B modem D. C modem
Last Answer : B. X modem
Description : What is the data link protocol that is used in asynchronous transmission for transferring files from one computer to another? A. A modem B. X modem C. B modem
Description : What carrier system multiplexes 96 voice band channels into a single 6.312 Mbps data signal? A. T1 carrier system B. T2 carrier system C. T1C carrier system D. T3 carrier system
Last Answer : B. T2 carrier system
Description : Which of the following is referred to as a radio emission without sidebands A. Analog B. Carrier C. Data D. Voice
Last Answer : B. Carrier
Description : 12 voice channels are sampled at 8000 sampling rate and encoded into 8 bit PCM word. Determine the rate of the data stream. a. 354 kbps b. 750 kbps c. 768 kbps d. 640 kbps
Last Answer : c. 768 kbps
Description : Space diversity transmission means transmitting and receiving on _______. A. Two or more antennas operating on two different frequencies B. Two or more identical frequencies C. Two or more antennas operating on the same frequency D. Two or more different frequency
Last Answer : C. Two or more antennas operating on the same frequency
Description : Full duplex transmission means A. One way transmission B. 24-hour transmission C. Broadcast transmission D. Two-way simultaneous transmission
Last Answer : D. Two-way simultaneous transmission
Description : Modulation means A. Varying of information B. Utilization of a single transmission channel to carry multiple signals C. Varying of some parameters of a carrier such as its amplitude to transmit information D. Transmit pulses in DC form on a copper wire
Last Answer : C. Varying of some parameters of a carrier such as its amplitude to transmit information
Description : Space diversity transmission means transmitting and receiving on A. two or more antennas operating on two different frequencies B. two or more identical frequencies C. two or more different frequencies D. two or more antennas operating on the same frequencies
Last Answer : D. two or more antennas operating on the same frequencies
Description : Termination means A. result of disconnecting a line from a transmitter B. result of cutting both ends of a conductor C. looking back impedance of a line with no load D. load connected to the output end of a transmission line
Last Answer : D. load connected to the output end of a transmission line
Description : Transmission of printed material over telephone lines. A. Video text B. Facsimile C. Encoding D. Xerox copy
Last Answer : B. Facsimile
Description : What do you call a transmission line used specifically for the purpose of achieving delay? A. Delay line B. Flat line C. Resonant line D. Non-resonant line
Last Answer : A. Delay line
Description : What do you call the phenomenon in digital circuits that describe the duration of time a digital signal passes a circuit? A. Transmission time B. Elapsed time C. Propagation delay D. Travel delay
Last Answer : C. Propagation delay
Description : The main benefit of light-wave communications over microwaves or any other communications media is a. Lower cost b. Better security c. Wider bandwidth d. Freedom from interference
Last Answer : c. Wider bandwidth
Description : Which of the following is used as an optical receiver in fiber optics communications a. APD b. Tunnel diode c. Laser diode d. LED
Last Answer : a. APD
Description : Which of the following is used as an optical transmitter on the Fiber Optical Communications? a. APD b. LSA diode c. PIN diode d. LED
Last Answer : d. LED
Description : Is a non-coherent light source foe optical communications system. a. ILD b. LED c. APD d. PIN Diode
Last Answer : b. LED
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 : 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 : 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 : 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 : The main function of a communications satellite is a/ an A. repeater B. reflector C. beacon D. observation platform
Last Answer : A. repeater
Description : The frequency of Ku band for satellite communications. A. 6/4 GHz B. 14/11 GHz C. 12/14 GHz D. 4/8 GHz
Last Answer : B. 14/11 GHz