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 4 of 48

Discover more Topics under Electronics and Communication Engineering

Q31.
For G(jฯ‰) =

a.

magnitude is 1 at all frequencies and phase angle varies from 0 to - 180° as ฯ‰ varies from 0 to โˆž

b.

magnitude is T at all frequencies and phase angle 0

c.

magnitude is (1 + ฯ‰²T²)^0.5 and phase angle varies from 0 to 0 - 180° as ฯ‰ varies from 0 to โˆž

d.

none of the above

Discuss
Answer: (a).magnitude is 1 at all frequencies and phase angle varies from 0 to - 180° as ฯ‰ varies from 0 to โˆž
Q32.
A FET is a __________ controlled device whereas a bipolar transistor is a __________ controlled device.

a.

gate, drain

b.

drain, gate

c.

current, voltage

d.

voltage, current

Discuss
Answer: (d).voltage, current
Q33.
In Bode diagram (log magnitude plot) the factor 1/jฯ‰ in the transfer function gives a line having slope

a.

-20 dB per octave

b.

-10 dB per octave

c.

-6 dB per octave

d.

-2 dB per octave

Discuss
Answer: (c).-6 dB per octave
Q34.
A negative feedback system has G(s) = 1/(s+1) and H(s) = K/s(s+2). The closed loop system is stable for

a.

K > 20

b.

15 < K < 19

c.

8 โ‰ค K โ‰ค 14

d.

K < 6

Discuss
Answer: (d).K < 6
Q35.
Mechanical impedance is the ratio of

a.

rms force to rms velocity

b.

rms force to rms displacement

c.

rms velocity to rms displacement

d.

none of the above

Discuss
Answer: (a).rms force to rms velocity
Q36.
Whether a linear system is stable or unstable that it

a.

is a property of the system only

b.

depends on the input function only

c.

both (a) and (b)

d.

either (a) or (b)

Discuss
Answer: (a).is a property of the system only
Q37.
A lag compensator is essentially a

a.

low pass filter

b.

high pass filter

c.

band pass filter

d.

either (a) or (b)

Discuss
Answer: (a).low pass filter
Q38.
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
Q39.
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
Q40.
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
Page 4 of 48