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 2 of 48

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Q11.
In the given figure the input frequency is such that R << Xc, then

a.

v0 lags vi by 90°

b.

v0 leads vi by 90°

c.

v0 and vi are in phase

d.

either (b) or (c)

Discuss
Answer: (a).v0 lags vi by 90°
Q12.
In the given figure, of potentiometer V0 = Vi (R0/Ri) only when

a.

RL = 0

b.

RL = ∞

c.

RL is neither low nor high

d.

RL is low but not zero

Discuss
Answer: (b).RL = ∞
Q13.
A unity feedback system has open loop transfer function (2s+1)/s² . The closed loop transfer function is

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (b).B
Q14.
Consider the systems with following open loop transfer functions. If unity feedback is used, the increasing order of time taken for unit step response to settle is

a.

1, 2, 3

b.

3, 1, 2

c.

2, 3, 1

d.

3, 2, 1

Discuss
Answer: (c).2, 3, 1
Q15.
The compensator of the given figure is a

a.

lag compensator

b.

lead compensator

c.

lag-lead compensator

d.

none of the above

Discuss
Answer: (b).lead compensator
Q16.
If error voltage is e(t), integral square error =

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (b).B
Q17.
In the given figure the input is x(t) = A sin ωt. The steady state output y(t) =

a.

A sin (ωt + φ) where φ = tan¯¹ |G(jω)|

b.

|G(jω)| A sin [ωt + ∠G(jω)]

c.

|G(jω)| A sin [2ωt + ∠G(jω)]

d.

A G(jω) sin [ωt + ∠G(jω)]

Discuss
Answer: (b).|G(jω)| A sin [ωt + ∠G(jω)]
Q18.
In the given figure x6 =

a.

de(ax1 + bx2 + cx3)

b.

(a + b + c) (x1 + x2 + x3) (d + e)

c.

(ax1 + bx2 + cx3) (d + e)

d.

a b c d e (x1 + x2 + x3)

Discuss
Answer: (a).de(ax1 + bx2 + cx3)
Q19.
For the given figure, C(s)/R(s) =

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (b).B
Q20.
For the control system in the given figure, the value of K for critical damping is

a.

1

b.

5.125

c.

6.831

d.

10

Discuss
Answer: (b).5.125
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