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 81 of 120

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Q801.
Armoured submarine cable is used

a.

to prevent insulation breakdown due to high voltage

b.

to protect cable at great depths.

c.

to prevent inadverent damage due to ploughing in

d.

for the shallow shore ends of cable.

Discuss
Answer: (d).for the shallow shore ends of cable.
Q802.
The frequency deviation of a FM signal produced from PM is

a.

identical to that of FM signal produced by direct method

b.

larger than that of a FM signal produced by direct method

c.

directly proportional to the peak amplitude and the frequency of modulating signal

d.

directly proportional to the peak amplitude of the modulating signal

Discuss
Answer: (d).directly proportional to the peak amplitude of the modulating signal
Q803.
Good frequency stability can be available

a.

crystal oscillators

b.

Hartley oscillators

c.

colpitts oscillators

d.

none of the above

Discuss
Answer: (a).crystal oscillators
Q804.
Assertion (A): The unit of telephone traffic measurement is erlang.

Reason (R): International circuits for communication are fitted with echo suppressors.

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
Q805.
The primary colours are

a.

blue and green

b.

blue and red

c.

red and green

d.

blue, red and green

Discuss
Answer: (d).blue, red and green
Q806.
The most commonly used system of modulating for telegraphy is

a.

single tone modulation

b.

on-off keying

c.

frequency shift keying

d.

pulse code modulation

Discuss
Answer: (c).frequency shift keying
Q807.
Which of the following antennas is not wide band?

a.

Marconi

b.

Helical

c.

Folded dipole

d.

Discone

Discuss
Answer: (a).Marconi
Q808.
In phase shift keying the input signal is

a.

st(t) = A cos ฯ‰0t and s2(t) = - A cos ฯ‰0t

b.

s1(t) = s2(t) = A cos ฯ‰0t

c.

s1(t) = A cos ฯ‰0t and s2(t) = A cos (ฯ‰0t + ฯ€/2)

d.

s1(t) = A cos ฯ‰0t and s2(t) = - A (cos ฯ‰0t + ฯ€/2)

Discuss
Answer: (a).st(t) = A cos ฯ‰0t and s2(t) = - A cos ฯ‰0t
Q809.
A circuit which cannot demodulate SSB is

a.

balanced modulator

b.

product detector

c.

BFO

d.

phase discriminator

Discuss
Answer: (d).phase discriminator
Q810.
In TV system in India IF video and IF audio frequencies are

a.

33.4 and 28.4 MHz respectively

b.

38.9 and 33.4 MHz respectively

c.

43.8 and 38.9 MHz respectively

d.

33.4 and 38.9 MHz respectively

Discuss
Answer: (b).38.9 and 33.4 MHz respectively
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