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 28 of 48

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Q271.
The shape of torque-speed curve of a two phase servo- motor mostly depends on

a.

ratio of rotor reactance to rotor resistance

b.

ratio of stator reactance to rotor resistance

c.

ratio of rotor reactance to rotor resistance and also the ratio of stator reactance to stator resistance

d.

magnitude of stator voltages

Discuss
Answer: (a).ratio of rotor reactance to rotor resistance
Q272.
In a lag network the input frequency is 100 fc where fc is critical frequency. The voltage gain is

a.

0 dB

b.

-20 dB

c.

-40 dB

d.

-60 dB

Discuss
Answer: (c).-40 dB
Q273.
Assertion (A): Temperature control of the passenger compartment of car uses both feed forward and feedback controls.

Reason (R): Feed forward control gives corrective action before the disturbance affects the output and feedback control applies corrective action after output changes.

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
Q274.
Assertion (A): Most of actual systems are non-linear.

Reason (R): Non linearity may be due to saturation, dead zone, square law etc.

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: (b).Both A and R are correct but R is not correct explanation of A
Q275.
The correct sequence of events to improve system stability is

a.

insert derivative action, use negative feedback, reduce gain

b.

reduce gain, use negative feedback, insert derivative action

c.

reduce gain, insert derivative feedback, use negative feed back

d.

use negative feedback, reduce gain, insert derivative action

Discuss
Answer: (d).use negative feedback, reduce gain, insert derivative action
Q276.
Assertion (A): For an underdamped system with damping ratio ΞΎ, the maximum overshoot is e-ΞΎΟ€/(1-ΞΎ²)^0.5

Reason (R): Peak time of a second order under damped system = Ο€/Ο‰d where Ο‰d is frequency of damped oscillations.

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: (b).Both A and R are correct but R is not correct explanation of A
Q277.
I-PD controlled system has

a.

I, P and D actions in forward path

b.

I, P and D actions in feedback path

c.

I action in forward path but P and D action in feedback path

d.

I action in feedback path but P and D actioins in forward path

Discuss
Answer: (c).I action in forward path but P and D action in feedback path
Q278.
Assertion (A): Laplace transform of impulse function is equal to area under the impulse.

Reason (R): An impulse function whose area is unity is called unit impulse function.

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: (b).Both A and R are correct but R is not correct explanation of A
Q279.
Optical encoders most commonly used in control systems are

a.

absolute encoders

b.

secondary encoders

c.

incremental encoders

d.

none of the above

Discuss
Answer: (c).incremental encoders
Q280.
A second order system exhibits 100% overshoot. The damping ratio is

a.

0

b.

1

c.

< 1

d.

> 1

Discuss
Answer: (a).0
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