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

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Q81.
The compensator in the given figure is a

a.

lag compensator

b.

lead compensator

c.

lag-lead compensator

d.

none of the above

Discuss
Answer: (c).lag-lead compensator
Q82.
For the block diagram of the given figure, the equation describing system dynamics is

a.

(1 + RCs) ฮ”ฮธ0(s) = ฮ”ฮธi(s) + R ฮ” H(s)

b.

(1 + RCs) [ฮ”H(s)] = ฮ”ฮธ(s) - ฮ”ฮธ0(s)

c.

(1 + RCs) ฮ”ฮธ0(s) = Rฮ” H(s) - ฮ” ฮธi(s)

d.

(1 + RCs) ฮ”ฮธi(s) = ฮ” H(s)[R] - ฮ”ฮธ0(s)

Discuss
Answer: (a).(1 + RCs) ฮ”ฮธ0(s) = ฮ”ฮธi(s) + R ฮ” H(s)
Q83.
For the given figure C(s)/R(s)

a.

K

b.

0.5 K

c.

2 K

d.

0.25 K

Discuss
Answer: (b).0.5 K
Q84.
The polar plot of

a.

does not cross real axis

b.

crosses real axis

c.

crosses real axis at ฯ‰ = 0.7 rad/sec

d.

crosses real axis at ฯ‰ = 1.4 rad/sec

Discuss
Answer: (a).does not cross real axis
Q85.
For the system of the given figure, the undamped natural frequency of closed loop poles is

a.

2 rad/sec

b.

1 rad/sec

c.

0.5 rad/sec

d.

0.25 rad/sec

Discuss
Answer: (a).2 rad/sec
Q86.
In the given figure C(s)/U(s) =

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (a).A
Q87.
The signal flow graph of a system is shown in the given figure. The effect of disturbance TD can be reduced by

a.

increasing G2 (s)

b.

decreasing G2 (s)

c.

increasing G1 (s)

d.

decreasing G1 (s)

Discuss
Answer: (c).increasing G1 (s)
Q88.
A motor is coupled to a load through gear ratio n. If T is the motor torque, Jm and JL are moment of inertia of rotor and load, then torque to inertia ratio referred to motor shaft is

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (c).C
Q89.
In the given figure the input frequency f = 0.1 (1/2 ฯ€ RC)

a.

0 dB

b.

3 dB

c.

-3 dB

d.

20 dB

Discuss
Answer: (a).0 dB
Q90.
The open loop frequency response of a unity feed back system is as given below. The gain margin and phase margin respectively are

a.

20 dB and 15°

b.

20 dB and 25°

c.

6 dB and 15°

d.

6 dB and 25°

Discuss
Answer: (c).6 dB and 15°
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