Automatic Control Systems MCQs

Welcome to our comprehensive collection of Multiple Choice Questions (MCQs) on Automatic Control 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 Automatic Control 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 Automatic Control Systems mcq questions that explore various aspects of Automatic Control Systems problems. Each MCQ is crafted to challenge your understanding of Automatic Control 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 Automatic Control 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 Automatic Control 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 Automatic Control Systems knowledge to the test? Let's get started with our carefully curated MCQs!

Automatic Control Systems MCQs | Page 33 of 48

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Q321.
The transfer function 1/(1+jฯ‰T) has the characteristics of high pass filter.

a.

True

b.

False

c.

May be True or False

d.

can't say

Discuss
Answer: (b).False
Q322.
Assertion (A): Positive feedback is not used in any circuit.

Reason (R): Positive feedback leads to instability.

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.

R is correct but A is wrong

Discuss
Answer: (d).R is correct but A is wrong
Q323.
If the Nyquist plot does not encircle the (-1 + j0) point the system is always stable.

a.

True

b.

False

c.

May be True or False

d.

can't say

Discuss
Answer: (b).False
Q324.
Assertion (A): When the phase margin of a control system is improved using a lead network, noise transmission increases.

Reason (R): Phase lead compensation increases bandwidth.

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.

R is correct but A is wrong

Discuss
Answer: (a).Both A and R are correct and R is correct explanation of A
Q325.
The entries in the first column of Routh array of a fourth order are 5, 2, - 0.1, 2, 1. The number of poles in the right half plane are

a.

1

b.

2

c.

3

d.

4

Discuss
Answer: (b).2
Q326.
In Bode diagram (log magnitude plot) the factor (jฯ‰)^n in the transfer function gives a line having slope

a.

20 dB/decade

b.

20n dB/decade

c.

20/n dB/decade

d.

-20n dB/decade

Discuss
Answer: (b).20n dB/decade
Q327.
The magnitude of transport lag factor is always zero.

a.

True

b.

False

c.

May be True or False

d.

can't say

Discuss
Answer: (b).False
Q328.
If G(s) H(s) = 1/(s²+100), the closed loop poles are on

a.

negative real axis

b.

jฯ‰ axis

c.

right half plane

d.

either (a) or (b)

Discuss
Answer: (b).jฯ‰ axis
Q329.
A system has 12 poles and 2 zeros. Its high frequency asymptote in its magnitude plot has a slope of

a.

-200 dB/decade

b.

-240 dB/decade

c.

-280 dB/decade

d.

-320 dB/decade

Discuss
Answer: (a).-200 dB/decade
Q330.
The open loop transfer function of a unity feedback system is G(s) = 1/(s+2)². The poles of closed loop system are at

a.

-2, -2

b.

-2, -1

c.

- 2, ± j 1

d.

- 2, 2

Discuss
Answer: (c).- 2, ± j 1
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