Closed-Loop Frequency Response MCQ’s

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This set of Control Systems Multiple Choice Questions & Answers (MCQs) focuses on “Closed-Loop Frequency Response”.

1. Maximum peak overshoot in time domain corresponds to :
a) Resonance peak
b) Resonant frequency
c) Bandwidth
d) Cut-off rate

2. Frequency of oscillation in time domain correspond to :
a) Resonance peak
b) Resonant frequency
c) Bandwidth
d) Cut-off rate

3. Closed loop frequency response is very useful as :
a) It approximately predicts the time response of the systems
b) Time response are converted into time domain specifications
c) After design time domain specification is converted into frequency domain
d) All of the mentioned

4. Bandwidth is :
a) Range of frequencies for which the system gain is more than-3dB
b) This is considered good range for transmission of signals
c) For better communication bandwidth of signal must be less
d) All of the mentioned

5. The important figures of merit to the system in frequency domain are :
a) Maximum value of resonant peak
b) Value of resonance frequency
c) Maximum value of resonant peak and Value of resonance frequency
d) Minimum value of resonance frequency

6. A polar plot intersects the unit circle at a point making -45° to the negative real axis then the phase margin of the system is :
a) -45°
b) 45°
c) 180°-45°
d) 180°+45°

7. Cut-off rate is the ability of the system to distinguish the signal from _____________
a) Bandwidth
b) Noise
c) Resonance peak
d) Magnitude

8. In q(s) plane Nyquist plot is symmetrical about the :
a) Imaginary axis
b) Real axis
c) Origin
d) None of the mentioned

9. The parameter which is constant along the constant N circle :
a) Frequency
b) Phase angle
c) Magnitude
d) Open loop gain

10. In second order system gain margin is :
a) Zero value
b) Finite value
c) Infinite value
d) None of the mentioned

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