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 26 of 48

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Q251.
For a stable system

a.

both phase and gain margin are negative

b.

both phase and gain margin are positive

c.

phase margin is positive but gain margin is negative

d.

gain margin is positive but phase margin is negative

Discuss
Answer: (b).both phase and gain margin are positive
Q252.
If G(s)H(s) = K/s²(s²+2s+2), the angle of departure of root locus at s = - 1 + j is

a.

zero

b.

90°

c.

-90°

d.

-180°

Discuss
Answer: (d).-180°
Q253.
Accurate amplitude measurements can be made more easily than accurate phase shift measurements.

a.

True

b.

False

c.

May be True or False

d.

can't say

Discuss
Answer: (a).True
Q254.
A synchro transmitter receiver unit is a

a.

two phase ac device

b.

3 phase ac device

c.

dc device

d.

1 phase ac device

Discuss
Answer: (d).1 phase ac device
Q255.
The transfer function of transportation lag is

a.

G(jฯ‰) = e^(jฯ‰T)

b.

G(jฯ‰) = e^(-jฯ‰T)

c.

G(jฯ‰) = (1 + jฯ‰T)

d.

G(jฯ‰) = (1 - jฯ‰T)

Discuss
Answer: (b).G(jฯ‰) = e^(-jฯ‰T)
Q256.
As the bandwidth increases, the cost of components

a.

generally decreases

b.

generally increases

c.

may increase or decrease

d.

does not change

Discuss
Answer: (b).generally increases
Q257.
If Nyquist plot has a encirclement of (-1 + jo) point, the system is stable if

a.

there are no poles of G(s) H(s) in right-half plane

b.

there is one pole of G(s) H(s) in right-half plane

c.

there is no zeros of G(s) H(s) in right-half plane

d.

none of the above

Discuss
Answer: (a).there are no poles of G(s) H(s) in right-half plane
Q258.
A conditionally stable system has

a.

one phase crossover frequency

b.

two phase crossover frequencies

c.

two or more phase crossover frequencies

d.

one or more phase crossover frequencies

Discuss
Answer: (c).two or more phase crossover frequencies
Q259.
In a pneumatic bellows

a.

the input surface, output surface and side walls are corrugated

b.

the input surface and output surface are flat but the side walls are corrugated

c.

the input surface and side walls are flat but the output surface is corrugated

d.

the input surface and output surface are corrugated but the side walls are flat

Discuss
Answer: (b).the input surface and output surface are flat but the side walls are corrugated
Q260.
Assertion (A): A large negative feedback is deliberately introduced in an amplifier to make its gain independent of variation in parameters of active device.

Reason (R): A large negative value of feedback results in a high value of return difference compared to unity which makes the feedback gain inversely proportional to the feedback factor.

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
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