Practice Quiz in Wire and Wireless Communications System Part 42

This is the Online Practice Quiz in Wire and Wireless Communications System Part 42 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 XLII of the Online Practice Quiz

Quiz in Wire and Wireless Communications System Question 411. In RJ-11, the RJ stands for A. Recommended Jack B. Released Jack C. Registered Jack D. Radio Jack Question 412. In a 4-wire telephone set connection, (used to connect telephone set to central office switching) the red coded wire is used __________. A. as ground wire B. to transmit the signal C. to receive the signal from the far end D. as a spare or for special purpose applications Question 413. Calls that are placed between two stations that are connected to different local exchanges. A. interoffice calls B. interswitch calls C. interexchange calls D. Any of these Question 414. It is the exchange of signaling messages between switching machines. A. loop signaling B. station signaling C. interoffice signaling D. pulse signaling Question 415. It is a measure of the faithful reproduction of scanned prints in a facsimile communications. A. fidelity B. contrast C. legibility D. chroma Question 416. These are unused sections of cables that are connected in shunt working cable pair, such as a local loop. They are used for party lines to connect to the same local loop. A. cross-connect loop B. drop wire tap C. bridge tap D. wire tap Question 417. What is the standard bandwidth of voice channel according to CCITT recommendations? A. 300 – 3.4 kHz B. 200 – 3.3 kHz C. 20 – 20 kHz D. 30 – 30 kHz Question 418. In facsimile technology, it is a number derived from the width-height ratio. A. numerical aperture B. scanning spot C. index of cooperation D. cut-off frequency Question 419. A typical echo suppressor suppresses the returned echo by how much? A. 10 dB B. 30 dB C. 45 dB D. 60 dB Question 420. It is a combination of passive components that are used to regulate the amplitude and frequency response of the voice signals. A. equalizer circuit B. balanced transformer C. balanced modulator D. hybrid network

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