Practice Quiz in Wire and Wireless Communications System Part 1

This is the Online Practice Quiz in Wire and Wireless Communications System Part 1 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.

Start Part I of the Online Practice Quiz

Quiz in Wire and Wireless Communications System Question 1. What is the number of channels of a cellular system with an allocated spectrum of 25 MHz and with a channel of 30 kHz bandwidth? A. 833 B. 240 C. 1000 D. 666 Question 2. A cell in the cellular telephone system means A. A power source B. Small area C. Large area D. Service area Question 3. By definition, for a sine wave A. 0 dBm = 0 V.U. B. 0 dBW = 0 V.U. C. 0 dBa = 0 V.U. D. 0 dBf = 0 V.U. Question 4. The number of transmit/receive channels in the cellular system is A. 625 B. 645 C. 655 D. 666 Question 5. When a single cell is divided into smaller cells that process is called A. Cell splitting B. Cell division C. Reuse D. Cell sharing Question 6. The transmission range of cellular telephony is generally about A. 80 km B. 65 km C. 160 km D. 16 km Question 7. The signals designed to keep the receivers and transmitters aligned. A. Carrier frequencies B. Pilot carrier signals C. Synchronizing signals D. Reference signals Question 8. What is a concentrator? A. A system that improves the signal-to-noise ratio by compressing the volume range of a signal. B. A device that varies the characteristics of a carrier signal in accordance with the waveform of a modulating signal which contains useful information C. A switching system that lets a large number of telephone or data processing subscribers use a lesser number of transmission lines or a narrow bandwidth D. Equipment in the central office. Question 9. A 300 ohms line is terminated in a resistance load of 200 ohms, the VSWR is A. 0.65 B. 1.5 C. Unity D. Zero Question 10. What is an acoustic coupler? A. A device that radiates audible signals via a transmitting antenna B. A device that converts electric signals into audio signals, enabling data to be transmitted over the public telephone network via a conventional telephone handset C. A device that receives audible signals and retransmits them at VHF frequencies D. A transducer

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