Communication Systems MCQs

Welcome to our comprehensive collection of Multiple Choice Questions (MCQs) on Communication Systems, a fundamental topic in the field of Electronics and Communication Engineering. Whether you're preparing for competitive exams, honing your problem-solving skills, or simply looking to enhance your abilities in this field, our Communication Systems MCQs are designed to help you grasp the core concepts and excel in solving problems.

In this section, you'll find a wide range of Communication Systems mcq questions that explore various aspects of Communication Systems problems. Each MCQ is crafted to challenge your understanding of Communication Systems principles, enabling you to refine your problem-solving techniques. Whether you're a student aiming to ace Electronics and Communication Engineering tests, a job seeker preparing for interviews, or someone simply interested in sharpening their skills, our Communication Systems MCQs are your pathway to success in mastering this essential Electronics and Communication Engineering topic.

Note: Each of the following question comes with multiple answer choices. Select the most appropriate option and test your understanding of Communication Systems. You can click on an option to test your knowledge before viewing the solution for a MCQ. Happy learning!

So, are you ready to put your Communication Systems knowledge to the test? Let's get started with our carefully curated MCQs!

Communication Systems MCQs | Page 84 of 120

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Q831.
For TV broadcast, picture signal is modulated in

a.

SSB

b.

VSB

c.

FM

d.

AM

Discuss
Answer: (d).AM
Q832.
Assertion (A): Stubs, directional couplers and baluns are very commonly used in communication systems

Reason (R): Characteristic impedance of a line is an important parameter.

a.

Both A and R are correct and R is correct explanation of A

b.

Both A and R are correct but R is not correct explanation of A

c.

A is correct but R is wrong

d.

A is wrong but R is correct

Discuss
Answer: (b).Both A and R are correct but R is not correct explanation of A
Q833.
Audio frequency range lies between

a.

20 Hz and 20 kHz

b.

20 kHz and 20 MHz

c.

2 MHz and 20 MHz

d.

20 MHz and 200 MHz

Discuss
Answer: (a).20 Hz and 20 kHz
Q834.
Assertion (A): SSB and ISB receivers have good S/N ratio

Reason (R): SSB and ISB receivers have good suppression of adjacent channels.

a.

Both A and R are correct and R is correct explanation of A

b.

Both A and R are correct but R is not correct explanation of A

c.

A is correct but R is wrong

d.

A is wrong but R is correct

Discuss
Answer: (b).Both A and R are correct but R is not correct explanation of A
Q835.
De-emphasis circuit is used

a.

to attenuate high frequencies

b.

to attenuate low frequencies

c.

to attenuate mid-band frequencies

d.

None of the above

Discuss
Answer: (a).to attenuate high frequencies
Q836.
Which is most important subsystem for recovering and reconstructing signal in a TDM system?

a.

Envelope detector followed by a low pass filter

b.

Synchronization ckt for proper timing

c.

Bandpass filter to segregate channels

d.

Coherent detector to ensure frequency and phase connection

Discuss
Answer: (a).Envelope detector followed by a low pass filter
Q837.
Which one of the following is an indirect way of generating FM?

a.

Armstrong modulator

b.

Varactor diode modulator

c.

Reactance FET modulator

d.

Reactance bipolar transistor modulator

Discuss
Answer: (a).Armstrong modulator
Q838.
Companding is used in PCM to

a.

reduce bandwidth

b.

increasing S/N ratio

c.

get almost uniform S/N ratio

d.

increase bandwidth

Discuss
Answer: (c).get almost uniform S/N ratio
Q839.
Assertion (A): In AM the amplitude of carrier is made proportional to the instantaneous amplitude of modulating wave

Reason (R): In AM, frequency of side band = frequency carrier ± frequency of modulating wave.

a.

Both A and R are correct and R is correct explanation of A

b.

Both A and R are correct but R is not correct explanation of A

c.

A is correct but R is wrong

d.

A is wrong but R is correct

Discuss
Answer: (b).Both A and R are correct but R is not correct explanation of A
Q840.
Pressing a key on telephone set generates two frequencies. The basis for selection of these frequencies is

a.

the harmonics of one frequency should not be mistaken for the other frequency

b.

the audio input to the handset transmitter should not be mistaken for a key pressing

c.

both (a) and (b)

d.

neither (a) nor (b)

Discuss
Answer: (c).both (a) and (b)
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