Practice Quiz in Wire and Wireless Communications System Part 54

(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 54 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 LIV of the Online Practice Quiz

Quiz in Wire and Wireless Communications System

Question 531. Telephone switching is accomplished by

A. Manual Switchboard

B. Step-by-step Switches

C. Crossbar switches

D. Any of these


Question 532. In a facsimile recorder what is used to make 1,500-Hz ac stronger than 2300 Hz?

A. non-linear slope filter

B. linear slope filter

C. active slope filter

D. passive slope filter


Question 533. What tone is used to stop fax?

A. 450 Hz

B. 500 Hz

C. 150 Hz

D. 250 Hz


Question 534. The signal heard on the telephone line which indicates that the called subscriber set is in use.

A. Dial tone

B. Ringing tone

C. Busy tone

D. Congestion tone


Question 535. A telephone number perform the following operations except

A. To route the call

B. To activate the necessary apparatus for proper call charging

C. To order clearing of connection

D. None of these


Question 536. What is the standard scanning LPI rates?

A. 120

B. 25

C. 400

D. 195


Question 537. It is defined as the optimum level of a test tone on a channel at some point in a communications system.

A. transmission level point

B. data level point

C. voice level point

D. baseband transmission point


Question 538. What type of control system crossbar switches are operating?

A. Manual

B. Progressive

C. Common

D. Automatic


Question 539. A line linking telephone central offices is called _____________ line.

A. Tie

B. Inter-office trunk

C. Routing

D. Connector


Question 540. The standard spacing for 19-D-88 cable loading code is

A. 700 ft.

B. 6000 ft.

C. 4500 ft.

D. 3000 ft.

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Practice Quiz in Wire and Wireless Communications System Part 54
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