# Time Response of Control Systems – 1 MCQ’s

This set of MATLAB Multiple Choice Questions & Answers (MCQs) focuses on “Time Response of Control Systems – 1″.

1. The steady state value of a system is _____ it’s a transient response.
a) dependent on
b) independent of
c) greater than
d) not observable from

2. For non-unity feedback system, the error is calculated with respect to the reference signal.
a) True
b) False

3. The transient response, yt(t), of a system becomes ____ as t tends to infinity.
a) 0
b) 1
c) Infinity
d) Undefined

4. Delay time is the time required by a system to reach a quarter of its steady state value.
a) True
b) False

```>>p=[0 1];
>> q=[ 1 -1 0];
>> step(p,q)```

a) An unstable response
b) A stable response
c) A marginally stable response
d) A marginally unstable response

6. What is the output of the following code?

```>>p=[ 1 0 1];
>> q=[  -1 1];
>> step(p,q);```

a) An unstable step response
b) A stable step response
c) Error
d) A marginally unstable response

7. Which of the following command will reveal the damping ratio of the system?
a) damp()
b) damp[]
c) damping{}
d) dr()

8. What is the output of the following code?

`tf({1},{1 1})`

a) Error
b) 1/s+1
c) s+1/1
d) 1/s

9. What is the output of the following code?

`impulse([1],[1 1])`

a) e-t*u(t)
b) e-t*u(-t)
c) e-t*u(t)
d) e+t*u(t)

10. If the damping factor is zero, the unit-step response is
a) Purely sinusoidal
b) Ramp function
c) Pulse function
d) Impulse function

11. From the following graphs of the generalized transfer function 1/s+a, which plot shows a transfer function with a bigger value of a?

a) Blue plot
b) Red plot
c) Yellow plot
d) Purple plot

12. If the damping ratio is equal to 1, a second-order system is _________
a) having maginary roots of the characteristic equation
b) underdamped
c) critically damped with unequal roots
d) critically damped with equal roots

13. If the damping factor is less than the damping factor at critical damping, the time response of the system is ___________
a) Underdamped
b) Overdamped
c) Marginally damped
d) Unstable

14. From the following graphs of the generalized transfer function 1/as2, which plot shows the transfer function for a higher a?

a) Blue
b) Red
c) Yellow
d) Purple