CONTROL SYSTEMS QUIZ

Number of roots in left hand half of s plane if characteristic equation is s3 - 4s2 + s + 6 = 0 ?

3.

0.

1.

2.

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The input-output relationship of a linear time invariant continuous time system is given by r(t) = d²c(t)/dt² + 3 dc(t)/dt + 2 c(t) Where r(t) and c(t) are input and output respectively. What is the transfer function of the system equal to?

1/(s² + s + 2)

2/(s² + s + 2)

2/(s² + 3s + 2)

1/(s² + 3s + 2)

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The transfer functions of two compensators are given below. Which one is correct? which one is correct?

Both C1 and C2 are lag compensator.

C1 is a lag compensator and C2 i

Both C1 and C2 are lead compensator.

C1 is a lead compensator and C2 i

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The characteristic equation of a control system is given below: The system is

critical stable

marginally stable

unstable

stable

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A negative feedback closed loop control system is supplied to an input of 5 volt. The system has a forward gain of 1 and a feedback gain of 1. What is the output voltage?

1.5 Volt.

2.0 Volt.

2.5 Volt.

1.0 Volt.

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The error of a system to a ramp input is 1/5, if the type of the system is decreased by one, then the error of unit step input is

6/5

0.167

5

0.2

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For the polynomial , find the number of roots which lie on the right half of s-plane?

2

1

4

0

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The graph of an electrical network has N nodes and B branches. The number of links, L with respect to the choice of a tree, is given by

N - B + 1.

N - 2B - 1.

B + N.

B - N + 1.

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Accurate and reliable output is possible with which of the following system?

Both 1 and 2

Closed loop control system

Open loop control system

None of these

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The transfer function of a system is 10/(1 + S) when operated as a unity feedback system, the steady state error to a unit step input will be

¾.

1/11.

10.

Zero.

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