Practice Quiz in Wire and Wireless Communications System Part 50

This is the Online Practice Quiz in Wire and Wireless Communications System Part 50 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 L of the Online Practice Quiz

Quiz in Wire and Wireless Communications System Question 491. It is simply the dedicated cable facility used to connect an instrument at a subscriber’s station to the closest telephone office. A. subscriber lines B. local loops C. subscriber loops D. any of these Question 492. It is used to convert two-wire circuits to four-wire circuits which is similar to hybrid coil found in standard telephone sets. A. balanced transformer B. hybrid circuits C. balanced modulator D. hybrid transformers Question 493. The 5-class switching hierarchy is a __________ scheme that establishes an end-to-end route mainly through trial and error. A. interleaved switching B. progressive switching C. point-to-point switching D. step-by-step switching Question 494. Circuits that are designed and configured for their use only and often referred to as private circuits or dedicated circuits. A. switched circuits B. leased circuits C. virtual circuits D. switched virtual circuits Question 495. When the image at the receiving end of a facsimile transmission us elongated horizontally, A. the transmitter IOC is less than the receiver IOC B. the transmitter IOC is greater than the receiver IOC C. the transmitter IOC is equal to the receiver IOC D. the IOC is not a factor Question 496. Which resolution produces the best quality fax? A. 96 lpi B. 150 lpi C. 200 lpi D. 400 lpi Question 497. It is a programmable matrix that allows circuits to be connected to one another. A. circuit switch B. tap switch C. equipment switch D. cross switch Question 498. It is a sudden, random changes in the phase of the signal. They are classified as temporary variations in the phase of the signal lasting longer than 4 ms. A. phase hits B. phase jitter C. interference D. distortion Question 499. When subscriber initiates a long distance calls, the local exchange connects the caller to the toll office through a facility called ________. A. interoffice toll trunk B. intraoffice toll trunk C. interoffice exchange trunk D. intraoffice exchange trunk Question 500. The most versatile and popular crossbar switch was __________. A. #4YB B. 5#YB C. #5XB D. #5ZB

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