Control System MCQs

Question 1

For a type I system, the position error arises at steady state when there is a

Accepted Answer

ramp or velocity Enput

Answer

constant acceleration input

Answer

step displacement input

Answer

none of these

Question 2

Position error constant k = G (0) = or the steady state error is always zero in response to step input of displacement for

Accepted Answer

type N (N > 1) system where N = 1,2,

Answer

type 0 system

Answer

type 2 system

Answer

type 3 system

Question 3

If the steady error for type 1 system with unit ramp input is kept constant, the output is

Accepted Answer

velocity

Answer

acceleration

Answer

displacement

Answer

none of the above

Question 4

For characteristic equation having more number of poles than zeros, the number of root locus branches will be equal to

Accepted Answer

number of poles

Answer

number of zeros

Answer

sum of A and B above

Answer

difference of B and A above

Question 5

In root locus plot, the number of asymptote is 360 divided by the number of

Accepted Answer

difference of A and B above

Answer

poles

Answer

zeros

Answer

sum of A and B above

Question 6

At breakaway point, several branches of root loci coalese because system characteristic equation has

Accepted Answer

sevral roots

Answer

single root

Answer

all root on right hand side of s-plane

Answer

imaginary roots only

Question 7

Number of separate parts of a root locus is equal to the

Accepted Answer

the order of the characteristic equation of the system

Answer

number of zeros in open loop transfer function

Answer

number of poles in closed loop transfer function

Answer

the difference between A and B

Question 8

At the point where 180? crosses the j-axis, the system is

Accepted Answer

absolutely unstable

Answer

absolutely stable

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conditionally stable

Answer

none of t.hese

Question 9

The phase shift of the second order system with transfer function 1/s2 is

Accepted Answer

-180?

Answer

180?

Answer

0

Answer

90?