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 7 of 48

Discover more Topics under Electronics and Communication Engineering

Q61.
If feedback factor is ฮฒ the overall gain of a closed loop system is approximately equal to

a.

1/Avฮฒ

b.

1/ฮฒ

c.

ฮฒ

d.

โˆšฮฒ

Discuss
Answer: (b).1/ฮฒ
Q62.
In control systems the magnitude of error voltage

a.

is very small

b.

is very large

c.

neither small nor large

d.

may be any value from 0 to 50 V

Discuss
Answer: (a).is very small
Q63.
The slope of log-magnitude asymptote changes by - 40 dB/ decade at a frequency ฯ‰โ‚. This means that

a.

a double pole is present

b.

a pair of complex conjugate poles is present

c.

either a double pole or a pair of complex conjugate poles is present

d.

a pole or zero at origin is present

Discuss
Answer: (c).either a double pole or a pair of complex conjugate poles is present
Q64.
For a factor 1/(jฯ‰)² in the transfer function, the log magnitude plot

a.

is a straight line with slope 0 dB/decade

b.

is a straight line with slope 20 dB/decade

c.

is a straight line with slope - 20 dB/decade

d.

is a straight line with slope - 40 dB/decade

Discuss
Answer: (d).is a straight line with slope - 40 dB/decade
Q65.
The frequency at which magnitude of closed loop frequency response is 3 dB below its zero frequency value is called critical frequency.

a.

True

b.

False

c.

May be True or False

d.

can't say

Discuss
Answer: (b).False
Q66.
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
Q67.
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
Q68.
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
Q69.
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
Q70.
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
Page 7 of 48