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 34 of 48

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Q331.
Coulomb friction is

a.

the force of sliding friction between dry surfaces

b.

the force of friction between moving surfaces separated by viscous fluid

c.

the force required to initiate motion between two contacting surfaces

d.

all of the above

Discuss
Answer: (a).the force of sliding friction between dry surfaces
Q332.
The damping ratio of a pair of complex poles when expressed in terms of angle ฮธ measured from jฯ‰ axis equal to

a.

sin ฮธ

b.

cos ฮธ

c.

tan ฮธ

d.

cot ฮธ

Discuss
Answer: (a).sin ฮธ
Q333.
The slope of log magnitude curve changes by - 40 dB/decade at a certain frequency and the error between asymptote and actual curve is positive. This means that

a.

a double pole is present

b.

a pair of complex conjugate poles is present

c.

either (a) or (b)

d.

neither (a) nor (b)

Discuss
Answer: (b).a pair of complex conjugate poles is present
Q334.
A system has high gain and phase margin. The system is

a.

very stable

b.

sluggish

c.

very stable and sluggish

d.

oscillatory

Discuss
Answer: (c).very stable and sluggish
Q335.
A proportional controller is basically

a.

an amplifier with adjustable gain

b.

an integrating amplifier

c.

an amplifier with infinite gain

d.

an amplifier with almost zero gain

Discuss
Answer: (a).an amplifier with adjustable gain
Q336.
Nyquist stability criterion is based on a theorem from the theory of complex variables.

a.

True

b.

False

c.

May be True or False

d.

can't say

Discuss
Answer: (a).True
Q337.
For the function G(s) H(s) = 1/s(s+1)(s+0.5) the phase cross-over frequency is

a.

0.5 rad/sec

b.

0.707 rad/sec

c.

1.732 rad/sec

d.

2 rad/sec

Discuss
Answer: (b).0.707 rad/sec
Q338.
While forming Routh's array, the situation of a row of zeros indicates that the system

a.

has symmetrically located roots

b.

is not sensitive to variations in gain

c.

is stable

d.

is unstable

Discuss
Answer: (a).has symmetrically located roots
Q339.
Assertion (A): In liquid system the ratio of change in liquid level to change in flow rate is called resistance of liquid flow.

Reason (R): In liquid level systems the ratio of change in liquid stored in a tank to the change in head is called capacitance of tank.

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
Q340.
Assertion (A): When the performance of a stable second order system is improved by a PID controller, the system may become unstable.

Reason (R): PID controller increases the order of the system to 3.

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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