Control System Multiple Choice Questions and Answers


16.  Feedback control systems are


   A. Insensitive to both forward and feedback path parameter changes

   B. Less sensitive to feedback path parameter changes than to forward path parameter changes

   C. Less sensitive to forward path parameter changes than to feedback path parameter changes

   D. Equally sensitive to forward and feedback path parameter changes


✔ View Answer


C. Less sensitive to forward path parameter changes than to feedback path parameter changes

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17.  In a speed control system, output rate feedback is used to


   A. Limit the speed of motor

   B. Limit the acceleration of the motor

   C. Reduce the damping of the system

   D. Increase the gain margin


✔ View Answer


C. Reduce the damping of the system

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18.  If the poles of a system lie on the imaginary axis, the system will be


   A. Stable

   B. Conditionally stable

   C. Marginally stable

   D. Unstable


✔ View Answer


C. Marginally stable

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19.  Addition of zeros in a transfer function causes


   A. Lead compensation

   B. Lag compensation

   C. Lead-lag compensation

   D. None of these


✔ View Answer


A. Lead compensation

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20.  A phase lead compensation network


   A. Decreases the system bandwidth

   B. Speeds up the dynamic response

   C. Is applied when error constants are specified

   D. Reduces the steady-state error


✔ View Answer


C. Is applied when error constants are specified

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