Practice Quiz in Wire and Wireless Communications System Part 16

This is the Online Practice Quiz in Wire and Wireless Communications System Part 16 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.

Continue Part XVI of the Online Practice Quiz

Quiz in Wire and Wireless Communications System Question 151. What type of receiver is most commonly used in a conventional telephone handset? A. Carbon B. Electromagnetic C. Electret D. Ceramic Question 152. Speakerphones operate in A. Full-duplex mode B. Half-duplex mode C. Open-duplex mode D. Computer mode Question 153. The combination of the mobile cellular phone and the cell-site radio equipment is known as A. forward link B. base transceiver station C. air interface D. base station controller Question 154. The step-by-step switch A. Was invented by Strowger B. Generates much noise C. Cannot operate directly from DTMF tones D. All of these Question 155. Sampling the analog wave produces A. Impulse noise B. Phase distortion C. Pulse amplitude modulation D. Frequency coherence Question 156. What is an Echo? A. A signal of the same amplitude but 180 degrees out of phase from the original signal and mixed with the original signal at the transmitter to produce a more intelligible output signal B. A wave which has been reflected or otherwise returned with the sufficient magnitude and delay for it to be perceptible in some manner as a wave distinct from that directly transmitted. C. The signal having a higher frequency than the original and transmitted back to earth by a passive satellite. D. A reflected signal. Question 157. The most widely used fax standard is A. Group 1 B. Group 2 C. Group 3 D. Group 4 Question 158. Group 2 fax uses which modulation? A. SSB B. FSK C. Vestigial sideband AM D. PSK Question 159. Block calls held condition specified the held probability at a time period equal to an average holding time. A. Erlang B B. Erlang C C. Erlang D D. Poisson Question 160. The mobile-to-base frequency assignment for GSM system is A. 890-915 MHz B. 935-960 MHz C. 870-890 MHz D. 825-845 MHz

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