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Test: Automatic Control Systems - 1


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25 Questions MCQ Test | Test: Automatic Control Systems - 1

Test: Automatic Control Systems - 1 for Electrical Engineering (EE) 2022 is part of Electrical Engineering (EE) preparation. The Test: Automatic Control Systems - 1 questions and answers have been prepared according to the Electrical Engineering (EE) exam syllabus.The Test: Automatic Control Systems - 1 MCQs are made for Electrical Engineering (EE) 2022 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Automatic Control Systems - 1 below.
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Test: Automatic Control Systems - 1 - Question 1

For the system in the given figure the characteristic equation is

Detailed Solution for Test: Automatic Control Systems - 1 - Question 1

Transfer function = .

Hence characteristic equation is .

Test: Automatic Control Systems - 1 - Question 2

Mechanical impedance is the ratio of

Detailed Solution for Test: Automatic Control Systems - 1 - Question 2

In force voltage analogy force is analogous to voltage and velocity to current. Just as , force/velocity = mechanical impedance.

Test: Automatic Control Systems - 1 - Question 3

For the system in the given figure. The transfer function C(s)/R(s) is

Detailed Solution for Test: Automatic Control Systems - 1 - Question 3

Transfer function = (G1 + 1) G2 + 1 = G1 G2 + G2 + 1.

Test: Automatic Control Systems - 1 - Question 4

Whether a linear system is stable or unstable that it

Detailed Solution for Test: Automatic Control Systems - 1 - Question 4

Stability is a property of the system only.

Test: Automatic Control Systems - 1 - Question 5

For the system of the given figure the transfer function =

Detailed Solution for Test: Automatic Control Systems - 1 - Question 5

, E0(s) = [I(s)][Z2(s)] or .

Test: Automatic Control Systems - 1 - Question 6

In the given figure shows pole-zero plot. If steady state gain is 2 the transfer function G(s) is

Detailed Solution for Test: Automatic Control Systems - 1 - Question 6

The zero at - 1 gives the term (s + 1) in the numerator.

The poles at (- 2 + j1) and (- 2 - j1) give (s2 + 4s + 5) term is the denominator. Gain is 2.

Test: Automatic Control Systems - 1 - Question 7

If a system is to follow arbitrary inputs accurately the bandwidth should be

Detailed Solution for Test: Automatic Control Systems - 1 - Question 7

Arbitrary inputs require large bandwidth.

Test: Automatic Control Systems - 1 - Question 8

For the system of the given figure, the damping ratio of closed loop poles is

Detailed Solution for Test: Automatic Control Systems - 1 - Question 8

The standard form of characteristic equation is .

Therefore .

Test: Automatic Control Systems - 1 - Question 9

Assertion (A): Potentiometers can not be used as error detectors in position control systems.

Reason (R): The resolution of a potentiometer places an upper limit on its accuracy

Detailed Solution for Test: Automatic Control Systems - 1 - Question 9

Potentiometers are used as error detectors.

Test: Automatic Control Systems - 1 - Question 10

For a first order system having transfer function , the unit impulse response is

Detailed Solution for Test: Automatic Control Systems - 1 - Question 10

Test: Automatic Control Systems - 1 - Question 11

For the given figure C(s)/R(s)

Detailed Solution for Test: Automatic Control Systems - 1 - Question 11

.

Test: Automatic Control Systems - 1 - Question 12

A stepper motor is

Detailed Solution for Test: Automatic Control Systems - 1 - Question 12

When input pulses are applied, the motor moves in steps.

Test: Automatic Control Systems - 1 - Question 13

In a two phase ac servomotor rotor resistance is R and rotor reactance is X. The speed curve will be linear if

Detailed Solution for Test: Automatic Control Systems - 1 - Question 13

In a two phase servomotor ∠ < 1 so that torque speed curve is almost linear.

Test: Automatic Control Systems - 1 - Question 14

In the given figure, the input frequency is such that R = XC. Then

Detailed Solution for Test: Automatic Control Systems - 1 - Question 14

R = XC, voltage drops across R and XC are equal and at 90º with respect by each other. V0 lags Vi by 45º.

Test: Automatic Control Systems - 1 - Question 15

From the noise point of view, bandwidth should

Detailed Solution for Test: Automatic Control Systems - 1 - Question 15

If noise is to be eliminated, bandwidth cannot be large.

Test: Automatic Control Systems - 1 - Question 16

First column elements of Routh's tabulation are 3, 5, , 2. It means that there

Detailed Solution for Test: Automatic Control Systems - 1 - Question 16

Since there are two sign changes in the first column, hence two roots in right half plane.

Test: Automatic Control Systems - 1 - Question 17

When a unit step voltage drives a lag network the output

Detailed Solution for Test: Automatic Control Systems - 1 - Question 17

At t = 0 the capacitor behaves as a short-circuit and output voltage is 0. At t = ∞ capacitor behaves as an open-circuit and V0 = Vi.

Test: Automatic Control Systems - 1 - Question 18

For the given figure C(s)/R(s)

Detailed Solution for Test: Automatic Control Systems - 1 - Question 18

.

Test: Automatic Control Systems - 1 - Question 19

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

Detailed Solution for Test: Automatic Control Systems - 1 - Question 19

Poles on j x-axis lead to oscillations.

Test: Automatic Control Systems - 1 - Question 20

For the circuit in the given figure,

Detailed Solution for Test: Automatic Control Systems - 1 - Question 20

.

Test: Automatic Control Systems - 1 - Question 21

In the given figure the input frequency is such that R << Xc, then

Detailed Solution for Test: Automatic Control Systems - 1 - Question 21

Voltage across capacitor lags by 90º.

Test: Automatic Control Systems - 1 - Question 22

Bellows converts

Detailed Solution for Test: Automatic Control Systems - 1 - Question 22

To measure pressure, it is convenient to convert pressure into displacement and then use a displacement transducer.

Test: Automatic Control Systems - 1 - Question 23

A unity feedback system has open loop transfer function The closed loop transfer function is

Detailed Solution for Test: Automatic Control Systems - 1 - Question 23

.

Test: Automatic Control Systems - 1 - Question 24

In the given figure, of potentiometer V0 = Vi (R0/Ri) only when

Detailed Solution for Test: Automatic Control Systems - 1 - Question 24

If RL is not infinite, the voltage ratio of potentiometer depends on the value of RL. This is called loading effect.

Test: Automatic Control Systems - 1 - Question 25

Assertion (A): The steady state response, of a stable, linear, time invariant system, to sinusoidal input depends on initial conditions.

Reason (R): Frequency response, in steady state, is obtained by replacing s in the transfer function by jω

Detailed Solution for Test: Automatic Control Systems - 1 - Question 25

Steady state response does not depend on initial conditions.

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