Practice Quiz in Wire and Wireless Communications System Part 47

This is the Online Practice Quiz in Wire and Wireless Communications System Part 47 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 XLVII of the Online Practice Quiz

Quiz in Wire and Wireless Communications System Question 461. Group 3 fax used which modulation? A. QAM B. FSK C. Vestigial sideband AM D. FM Question 462. The communications between two or three central offices is called A. interoffice link B. trunk C. interoffice calling D. loop Question 463. The location where individual cable pairs within a distribution cable are separated and extended to the subscriber’s location on a drop wire. A. feeder cable and distribution cable B. drop wire and aerial cable C. distribution cable and drop-wire cross-connect cables D. distribution cable and aerial cable Question 464. It is the actual time required for a particular frequency to propagate from a source to a destination through a communications channel. A. relative phase delay B. phase delay distortion C. absolute phase delay D. phase distortion Question 465. A the receiver, the phase difference at the different carrier frequencies is called _________. A. envelope delay distortion B. phase delay C. envelope delay D. propagation time Question 466. Type of Class 4 toll center usually had only outward operator service or perhaps no operator service at all. A. Class 2 B. Class 4P C. Class 1 D. Class 3 Question 467. The trunk circuits that are terminated in tandem switches are called A. tie trunks B. tandem trunks C. office trunks D. exchange trunks Question 468. It is a special balanced transformer used to convert a two-wire circuit into a four-wire circuit and vice-versa. A. equalizer circuit B. balanced transformer C. balanced modulator D. hybrid network Question 469. Modern paging system uses what modulation technique? A. FSK and QPSK B. PSK and QAM C. ASK and FSK D. FSK and PSK Question 470. Stage of the step-by-step switching system that is composed of switches to complete the connection to the called subscriber. A. line equipment B. switch train C. connectors D. switching network

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