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 17 of 120

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Q161.
Consider the following

1. Generation of SSB signals
2. Design of minimum phase type filters
3. Representation of band pass signals

Which of the above applications is Hilbert transform used?

a.

1 only

b.

1, 2 and 3

c.

1, 2 only

d.

1 and 3

Discuss
Answer: (b).1, 2 and 3
Q162.
The dc voltage on plate modulated class C amplifier is 8 kV. If the peak modulating voltage is 4 kV, the peak RF voltage delivered to load is

a.

32 kV

b.

12 kV

c.

0.5 kV

d.

24 kV

Discuss
Answer: (d).24 kV
Q163.
The minimum step size required for a Delta modulator operating at 36 samples/sec to track the signal (here u(t) is the unit step function) x(t) = 125t (u(t) - u(t - 1)) + (250 - 125t) (u(t - 1) - u(t - 2)) So that slope overload is avoided, would be

a.

2โ€พ¹โฐ

b.

2โ€พโธ

c.

2โ€พโถ

d.

2โ€พโด

Discuss
Answer: (b).2โ€พโธ
Q164.
An FM signal with a deviation ฮด is passed through a mixer, and has its frequency reduced 5 fold. The deviation in the output of the mixer is

a.

5/ฮด

b.

Intermediate

c.

ฮด/5

d.

ฮด

Discuss
Answer: (d).ฮด
Q165.
In PCM, if the number of quantization levels is increased from 4 to 64, then the bandwidth requirement will approximately be increased __________ times.

a.

8

b.

16

c.

3

d.

32

Discuss
Answer: (c).3
Q166.
A tweeter should be fed from the input through a

a.

low pass filter

b.

high pass filter

c.

band pass filter

d.

band stop filter

Discuss
Answer: (b).high pass filter
Q167.
The modulation index is, if fm = 500 Hz, ฮ”f = 2.25 kHz

a.

2.25

b.

4.5

c.

9

d.

18

Discuss
Answer: (b).4.5
Q168.
Which of the following is true in a tape recorder?

a.

Vow is due to variation in motor speed but flutter is due to some other reason

b.

Both vow and flutter are due to variations in motor speed

c.

Flutter is due to variation in motor speed but vow is due to some other reason

d.

Neither vow nor flutter is due to variation in motor speed

Discuss
Answer: (b).Both vow and flutter are due to variations in motor speed
Q169.
In a high speed modem the data rate handled is about

a.

1000 bps

b.

5000 bps

c.

20000 bps

d.

50000 bps

Discuss
Answer: (b).5000 bps
Q170.
Trinitron is a monochrome picture tube.

a.

True

b.

False

c.

May be True or False

d.

Can't say

Discuss
Answer: (b).False
Page 17 of 120