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Test: Automatic Control Systems - 8


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25 Questions MCQ Test | Test: Automatic Control Systems - 8

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Test: Automatic Control Systems - 8 - Question 1

Consider the following systems
System I,
System II,
where C(s) is the output and R(s) is the input of these systems

Test: Automatic Control Systems - 8 - Question 2

Nyquist stability criterion is based on a theorem from the theory of complex variables.

Test: Automatic Control Systems - 8 - Question 3

For the function G(s) H(s) = the phase cross-over frequency is

Test: Automatic Control Systems - 8 - Question 4

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.

Test: Automatic Control Systems - 8 - Question 5

While forming Routh's array, the situation of a row of zeros indicates that the system

Test: Automatic Control Systems - 8 - Question 6

The frequency at which phase angle is 180º is called

Test: Automatic Control Systems - 8 - Question 7

In a mechanical accelerometer, the steady state displacement is a measure of

Test: Automatic Control Systems - 8 - Question 8

A unity feedback system has . If input r(t) = 1 + 2t + t3, the steady error is

Test: Automatic Control Systems - 8 - Question 9

In log magnitude Bode diagram the slope of high frequency asymptote of (1 + jωT) is

Test: Automatic Control Systems - 8 - Question 10

Assertion (A): The root locus of a control system is symmetrical about real axis.

Reason (R): For all polynomials with real coefficients, complex poles always occur in conjugate pairs.

Test: Automatic Control Systems - 8 - Question 11

A compensator has its pole and zero as shown in the given figure

Test: Automatic Control Systems - 8 - Question 12

In a second order system, peak overshoot is independent of

Test: Automatic Control Systems - 8 - Question 13

For a stable system having two or more gain crossover frequencies the phase margin is measured

Test: Automatic Control Systems - 8 - Question 14

Nyquist plot provides information about absolute stability as well as relative stability.

Test: Automatic Control Systems - 8 - Question 15

Power handling capacity of wire wound potentiometer used in control systems is about

Test: Automatic Control Systems - 8 - Question 16

The Nyquist plot in the given figure is for G(s) H(s) =

Test: Automatic Control Systems - 8 - Question 17

For a factor the log

Test: Automatic Control Systems - 8 - Question 18

The number of stator field windings in an ac tachometer are

Test: Automatic Control Systems - 8 - Question 19

The radius of constant N circle for N = 1 is

Test: Automatic Control Systems - 8 - Question 20

In using Nyquist stability criterion it is not necessary to determine closed loop poles.

Test: Automatic Control Systems - 8 - Question 21

The polar plot of transport lag is a unit circle.

Test: Automatic Control Systems - 8 - Question 22

The given figure shows a hybrid servosystem. The components 1, 2, 3, 4 are respectively

Test: Automatic Control Systems - 8 - Question 23

For the transport lag G(jω) = e-jωT, the polar plot is

Test: Automatic Control Systems - 8 - Question 24

For the signal flow graph of the given figure consider the following statements

  1. It has three forward paths
  2. It has three individual loops
  3. It has two non touching loops

Out of above the correct statements are

 

Test: Automatic Control Systems - 8 - Question 25

Consider the following statements:

  1. The positiveness of coefficients of characteristic equation is necessary as well as sufficient condition for stability of first and second order systems.
  2. The positiveness of coefficients of characteristic equation ensures negativeness of real roots but is not sufficient condition for stability of third and higher order systems.
Out of above statements:
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