Practice Quiz in Wire and Wireless Communications System Part 11

(Last Updated On: December 21, 2017)

Quiz in Wire and Wireless Communications System

This is the Online Practice Quiz in Wire and Wireless Communications System Part 11 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 XI of the Online Practice Quiz

Quiz in Wire and Wireless Communications System

Question 101. Multiplexer systems used in the public network are of the ______ type.

A. Synchronous

B. Plesiochronous

C. Asynchronous

D. Isochronous


Question 102. The modulation technique used audio signal for TACS

A. FM

B. FSK

C. TFSK

D. QAM


Question 103. The duplex frequency of GSM

A. 40 MHz

B. 80 MHz

C. 120 MHz

D. 30 MHz


Question 104. What is a four-wire circuit?

A. Is used between serving central offices for long-distance connections, with one pair being used for each direction of transmission.

B. . Is a circuit with three output terminals and one input terminal

C. Is an oscillator that produces four different frequencies simultaneously

D. A circuit consisting of four transmission lines.


Question 105. The telephone was invented by

A. Watson

B. Bell

C. Strowger

D. Edison


Question 106. The modulation scheme used for NADC

A. NFSK

B. Quarter wavelength Shifted QPSK

C. GFSK

D. Trellis coding


Question 107. Speech coding rate for GSM

A. 80 kbps

B. 25 kbps

C. 21 kbps

D. 13 kbps


Question 108. What function are provided in a multi-tone ringing generator?

A. Anti-tinkle circuitry

B. Tone generation

C. Output amplifier

D. All of these


Question 109. Which of the following echo is completely out of control?

A. Worst echo

B. Reverberation

C. Singing

D. Feedback


Question 110. The type of receiver widely used in the conventional telephone set

A. Electromagnetic

B. Ceramic

C. Carbon

D. Piezoelectric

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