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ESE : Control Systems Champion Quiz 1

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Question 1

In a closed loop system for which the output is the speed of a motor, the output rate control can be used to.

Question 2

A tachometer has a sensitivity of 5 V/1000 rpm. The gain constant of the tachometer is __________.

Question 3

In case of DC servo-motor the back-emf is equivalent to an “electric friction” which tends to.

Question 4

The transfer function of a linear-time- invariant system is given as . What is the steady state value of the unit- impulse response?

Question 5

A linear time-invariant system initially at rest, when subjected to a unit-step input, gives a response

y(t)= t.e-t, t>0. The transfer function of the system is:

Question 6

If the initial conditions for a system are inherently zero, what does it physically mean?

Question 7

The transfer function of any stable system which has no zeros or poles in the right half of the s-plane is said to be.

Question 8

The Laplace transform of is.

Question 9

With negative feedback, the system stability and system gain respectively

Question 10

Consider the following statements in connection with the feedback of control systems :
1) Feedback can improve stability or be harmful to stability if it is not properly applied.
2) Feedback can always improve stability.
3) In many situations the feedback can reduce the effect of noise and disturbance on system performance.
4) In general the sensitivity of the system gain of a feedback system to a parameter variation depends on where the parameter is located.
Which of these statements are correct ?
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Feb 15ESE & GATE EC