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 10 of 120

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Q91.
A modem is classified as low speed if data rate handled is

a.

upto 100 bps

b.

upto 250 bps

c.

upto 400 bps

d.

upto 600 bps

Discuss
Answer: (d).upto 600 bps
Q92.
VSB modulation is preferred in TV because

a.

it reduces the bandwidth requirement to half

b.

it avoids phase distortion at low frequencies

c.

it results in better reception

d.

none of the above

Discuss
Answer: (a).it reduces the bandwidth requirement to half
Q93.
A woofer 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: (a).low pass filter
Q94.
It is desired that transmission line and load should match for a range of frequencies. The best method is

a.

to use a balun

b.

to use a single stub of adjustable position

c.

to use a double stub

d.

to use a broad band amplifier

Discuss
Answer: (c).to use a double stub
Q95.
Which of the following has the highest input impedance?

a.

CE

b.

CB

c.

CC

d.

Push pull

Discuss
Answer: (c).CC
Q96.
In a fascimile reproduction time to scan one line is 2 ms. If it has 4% blanking, the visible trace time is

a.

1.92 ms

b.

2.08 ms

c.

50 ms

d.

0.08 ms

Discuss
Answer: (a).1.92 ms
Q97.
Consider the following statements

1. The amplitude of an FM wave is constant
2. FM is more immune to noise than AM
3. FM broadcasts operate in upper VHF and UHF frequency ranges
4.FM transmitting and receiving equipments are simpler as compared to AM transmitting and receiving equipments

Which of the above are correct?

a.

1, 2, 3, 4

b.

1, 2, 3

c.

2, 3, 4

d.

1, 3, 4

Discuss
Answer: (b).1, 2, 3
Q98.
Signal to noise ratio of microphone is defined as the ratio of output when the sound pressure is __________ to the output in the absence of any sound signal.

a.

0.5 Pa

b.

0.2 Pa

c.

0.1 Pa

d.

0.01 Pa

Discuss
Answer: (c).0.1 Pa
Q99.
Fields are said to be circularly polarised if their magnitudes are

a.

equal and they are in phase

b.

equal but they differ in phase by ± 90°

c.

unequal and differ in phase by ± 90°

d.

unequal but are in phase

Discuss
Answer: (b).equal but they differ in phase by ± 90°
Q100.
Three analog signals, having bandwidths 1200 Hz, 600 Hz, 600 Hz are sampled at their Nyquist rates, encoded with 12 bit words, and time division multiplexed. The bit rate for the multiplexed signal is

a.

115.2 kbps

b.

28.8 kbps

c.

57.6 kbps

d.

38.4 kbps

Discuss
Answer: (c).57.6 kbps
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