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 9 of 48

Discover more Topics under Electronics and Communication Engineering

Q81.
A thermometer requires 1 minute to indicate 98% of its final response to a step input. If it is a first order system the time constant is

a.

1 minute

b.

0.5 minute

c.

0.25 minute

d.

0.1 minute

Discuss
Answer: (c).0.25 minute
Q82.
Assertion (A): A slight change in pole-zero configuration can cause only minor changes in root locus configuration.

Reason (R): Asymptotes show the behaviour of root loci for |s| >> 1

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
Q83.
In a second order system Ο‰n = 10 rad/sec and ΞΆ = 0.1, then Ο‰d =

a.

9.1 rad/sec

b.

9.95 rad/sec

c.

9 rad/sec

d.

1 rad/sec

Discuss
Answer: (b).9.95 rad/sec
Q84.
In a second order undamped system, the poles are on

a.

positive real axis

b.

imaginary axis

c.

negative real axis

d.

either (a) or (c)

Discuss
Answer: (b).imaginary axis
Q85.
An open loop system has a forward path transfer function (42.25)/s(s + 6.5). The unit step response of the system starting from rest will have its maximum value at a time equal to

a.

0 sec

b.

0.56 sec

c.

5.6 sec

d.

infinity

Discuss
Answer: (d).infinity
Q86.
Which of the following is not a necessary advantage of negative feedback system?

a.

Feedback improves speed of response

b.

Feedback improves stability

c.

Feedback reduces effect of variations in system parameters

d.

Feedback reduces the effect of external disturbances

Discuss
Answer: (b).Feedback improves stability
Q87.
In position control system the device used for providing rate feedback voltage is

a.

potentiometer

b.

synchro-transmitter

c.

synchro-transformer

d.

tacho generator

Discuss
Answer: (d).tacho generator
Q88.
Derivative control action is effective?

a.

Only during steady state periods

b.

Only during transient state periods

c.

During both steady state and transient state periods

d.

Either during steady state or during transient state periods

Discuss
Answer: (b).Only during transient state periods
Q89.
The phase angle curve of G(jω) H(jω) can be drawn

a.

by adding the phase angle curves of individual factors

b.

by subtracting the phase angle curves of individual factors

c.

by multiplying the phase angle curves of individual factors

d.

by dividing the phase angle curves of individual factors

Discuss
Answer: (a).by adding the phase angle curves of individual factors
Q90.
The most commonly used devices for differencing and amplification, in control systems, are

a.

BJT amplifiers

b.

FET amplifiers

c.

operational amplifiers

d.

either (a) or (b)

Discuss
Answer: (c).operational amplifiers
Page 9 of 48