Practice Quiz in Wire and Wireless Communications System Part 53

(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 53 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 LIII of the Online Practice Quiz

Quiz in Wire and Wireless Communications System

Question 521. The common channel interoffice signalling method

A. Uses the same channel for signalling as for the related conversation

B. Is used on local loops

C. Uses a separate channel for signalling only

D. Comes the signalling for one related conversation

Question 522. ___________ is a unit of telephone traffic defined as one user making a call of one second duration.


B. Call-second

C. Erlangs

D. Call-hour

Question 523. The subscriber loop provides the following except:

A. Talk battery

B. Ringing voltage

C. Telephone dial

D. Current during on hook

Question 524. Why is the blade an endless loop in facsimile?

A. wears faster

B. wears slower

C. wears average speed

D. never wears

Question 525. The primary cause of echo and singing is

A. Intermodulation noise

B. Crosstalk

C. Impedance mismatch

D. Thermal noise

Question 526. An arrangement where the only possible connection between a numbers of exchanges is through a single tandem or transit exchange where they are all connected.

A. Mesh

B. Star

C. Composite

D. Ring

Question 527. The last two digits of the loaded cable designation 22E66 indicates

A. Spacing

B. Coil inductance

C. Wire gauge

D. Attenuation

Question 528. The voice frequency channel pass band is:

A. 0 to 4000 Hz

B. 300 to 3000 Hz

C. To carry only speech

D. ALL of these

Question 529. A telephone service that uses a common 800 area code regardless of the location of the destination.

A. wide area telephone service

B. local area telephone service

C. metropolitan area telephone service

D. personal area telephone service

Question 530. In the FDM hierarchy, a mastergroup is composed of ten supergroups and is equivalent to

A. 600 channels

B. 60 channels

C. 180 channels

D. 120 channels

List of Practice Quizzes

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