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 12 of 48

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Q111.
For the following transfer function, the polar plot a is

a.

semi circle

b.

circle

c.

spiral

d.

none of the above

Discuss
Answer: (c).spiral
Q112.
A network has G(s) as under, Then

a.

it is lead network

b.

it is lag network

c.

it is lead network if T1 > T2 and lag network T1 < T2

d.

it is lead network if T1 < T2 and lag network T1 > T2

Discuss
Answer: (c).it is lead network if T1 > T2 and lag network T1 < T2
Q113.
The given figure shows log magnitude versus ฯ‰ plots of a system for different values of gain. For this system

a.

curve 1 shows highest gain margin and curve 2 shows poorest gain margin

b.

gain margins shown by the three curves are equal

c.

curve 1 shows poorest gain margin and curve 3 shows highest gain margin

d.

curve 3 shows poorest gain margin while curve 1 shows highest gain margin

Discuss
Answer: (c).curve 1 shows poorest gain margin and curve 3 shows highest gain margin
Q114.
The pole zero plot of the given figure is for

a.

non-minimum phase function

b.

minimum phase function

c.

all pass function

d.

either (b) or (c)

Discuss
Answer: (a).non-minimum phase function
Q115.
For the following function, the poles are at

a.

s = 0 and s = โˆž

b.

s = j2nฯ€ where n = 0, 1, 2

c.

s = ± j2nฯ€ where n = 0, 1, 2..

d.

none of the above

Discuss
Answer: (c).s = ± j2nฯ€ where n = 0, 1, 2..
Q116.
The given figure shows a constant current source driving a parallel RC circuit. It is equivalent to

a.

a lag network

b.

a lead network

c.

a lag-lead network

d.

either (a) or (b)

Discuss
Answer: (a).a lag network
Q117.
The system in the given figure has

a.

good gain and phase margins

b.

good gain margin and poor phase margin

c.

poor gain and phase margins

d.

poor gain margin but good phase margin

Discuss
Answer: (b).good gain margin and poor phase margin
Q118.
A feedback amplifier has forward gains A1, A2 and feedback factor ฮฒ as shown in signal flow graph of the given figure. Because of feedback as shown in signal noise ratio at output will

a.

increase

b.

decrease

c.

be unaffected

d.

depend on value of ฮฒ

Discuss
Answer: (c).be unaffected
Q119.
For the system in the given figure R(s) = 1/s . Then steady state error is

a.

1/(1+K)

b.

K

c.

Zero

d.

1

Discuss
Answer: (c).Zero
Q120.
For the system shown in the given figure the time response to unit step input is

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (c).C
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