Practice Quiz in Wire and Wireless Communications System Part 58

Online Practice Quiz in Wire and Wireless Communications System part 58 as one of the Communications Engineering topic.

Quiz in Wire and Wireless Communications System

This is the Online Practice Quiz in Wire and Wireless Communications System Part 58 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 LVIII of the Online Practice Quiz

Quiz in Wire and Wireless Communications System

Question 571. If the tuning meter reads low-scale, what would this indicate in facsimile?

A. 1500 signal

B. 1700 signal

C. 2300 signal

D. 2400 signal


Question 572. For PCM, the sampling theorem states that the sampling frequency must be _________ the highest frequency contained in the analog signal.

A. twice

B. more than twice

C. less than twice

D. equal to


Question 573. Noise that is non-continuous, consisting of irregular pulse or noise spikes of short duration and of relatively high amplitude.

A. Solar

B. Intermodulation

C. Impulse

D. Crosstalk


Question 574. A telephone service wherein calls are rerouted into a preassigned station is called _________.

A. Camp-On

B. Call Forwarding

C. Call Barring

D. Abbreviated Dialing


Question 575. With what type transmitter is fax transmitted on VHF?

A. FM

B. PM

C. SSB

D. AM


Question 576. What tone is used to start fax?

A. 400 Hz

B. 100 Hz

C. 300 Hz

D. 500 Hz


Question 577. The criteria to be considered in designing a telephone system

A. Attenuation limit

B. Resistance limit

C. A or B

D. A and B


Question 578. The most commonly used light sensor in a modern fax machine is a

A. Phototube

B. Phototransistor

C. Liquid-crystal display

D. Charged coupled device


Question 579. It can be defined as any disturbance created in a communications channel by signals in other communications channel.

A. crosstalk

B. interference

C. hits

D. jitter


Question 580. Request for service from the telephone is detected at the Central Office as

A. Dial pulses

B. Ringing signal

C. Flow of loop current

D. Battery reversal

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