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 6 of 48

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Q51.
A system has its two poles on the negative real axis and one pair of poles lies on jฯ‰ axis. The system is

a.

stable

b.

unstable

c.

limitedly stable

d.

either (a) or (c)

Discuss
Answer: (c).limitedly stable
Q52.
In a minimum phase system

a.

all poles lie in the left half plane

b.

all zeros lie in the left half plane

c.

all poles lie in the right half plane

d.

all except one pole or zero lie in the left half plane

Discuss
Answer: (b).all zeros lie in the left half plane
Q53.
A stepper motor is

a.

a two phase induction motor

b.

is a kind of rotating amplifier

c.

is an electromagnetic transducer used to convert an angular position of shaft into electrical signal

d.

is an electromechanical device which actuates a train of step angular movements in response to a train of input pulses on one to one basis

Discuss
Answer: (d).is an electromechanical device which actuates a train of step angular movements in response to a train of input pulses on one to one basis
Q54.
In a two phase ac servomotor rotor resistance is R and rotor reactance is X. The speed curve will be linear if

a.

X/R << 1

b.

X/R >> 1

c.

X/R = 1

d.

X² = R

Discuss
Answer: (a).X/R << 1
Q55.
From the noise point of view, bandwidth should

a.

be large

b.

not be too large

c.

should be as large as possible

d.

should be infinite

Discuss
Answer: (b).not be too large
Q56.
The primary function of lag compensator is to provide sufficient

a.

gain margin

b.

phase margin

c.

both gain margin and phase margin

d.

either (a) or (b)

Discuss
Answer: (b).phase margin
Q57.
The polar plot of a transfer function passes through (-1, 0) point. The gain margin is

a.

zero

b.

- 1 dB

c.

1 dB

d.

infinity

Discuss
Answer: (a).zero
Q58.
The transient response of a second order system is given by following equation. For 5% criterion the settling time is

a.

0.25 sec

b.

0.75 sec

c.

1.25 sec

d.

4 sec

Discuss
Answer: (b).0.75 sec
Q59.
For the system in the given figure, the transfer function C(s)/R(s) is

a.

G1 + G2 + G3

b.

G1 G2 + G3

c.

G1 G2 G3

d.

(G1 + G2) G3

Discuss
Answer: (b).G1 G2 + G3
Q60.
For the system in the given figure, the characteristic equation is

a.

s² + s(3 + 6a) + 6 = 0

b.

s² + s(3 + 12a) + 12 = 0

c.

s² + 3s = 0

d.

s² + 6s = 0

Discuss
Answer: (a).s² + s(3 + 6a) + 6 = 0
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