Practice Quiz in Wire and Wireless Communications System Part 19

This is the Online Practice Quiz in Wire and Wireless Communications System Part 19 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 XIX of the Online Practice Quiz

Quiz in Wire and Wireless Communications System Question 181. The simplest form of coding is A. Diphase B. Hybrid C. Compressed D. Linear Question 182. The type of dialing possible for telephone set with rotary dial. A. Tone dialing B. Pulse dialing C. Loop dialing D. E & M dialing Question 183. The line coding scheme used for the DS-1 signal is A. Non-return-to-zero B. Binary 3 zero-substitutions C. Ternary D. Bipolar Question 184. Under ordinary circumstances, the CCITT recommends that the number of circuits in tandem must not exceed A. 9 B. 10 C. 11 D. 12 Question 185. What is the function of the diode rectifier bridge in the line circuit? A. Lower the voltage to the telephone electronics B. Raise the voltage to the telephone electronics C. Short out the line when the set is on-hook D. Protect the set against polarity reversals on the line Question 186. The most common technique for binary data transmission A. Bisynchronous transmission B. Synchronous transmission C. Asynchronous transmission D. Plesiochronous transmission Question 187. Memory is added to the telephone set to A. Allow more digits to be dialed B. Allow faster dialing C. Allow automatic redialing of the last number dialed D. None of these Question 188. Which of the following are important for the proper interface of a DTMF generator to the telephone line? A. Impedance B. Tone amplitude C. Loop current D. All of these Question 189. What is the system used by Personal Communication Network (PCN)? A. TACS B. Modified GSM C. AMPS D. CDMA Question 190. The anti-tinkle circuit A. Prevents tampering with the telephone B. Prevents dial pulsing from ringing the bell C. Prevents speech signals from ringing the bell D. All of these

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