Closed Loop Control System Multiple Choice Questions and Answers


11.  In closed loop control system, with positive value of feedback gain the overall gain of the system will


   A. Decrease

   B. Increase

   C. Be unaffected

   D. Any of the above


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A. Decrease

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12.  A closed loop system is distinguished from open loop system by which of the following ?


   A. Servomechanism

   B. Feedback

   C. Output pattern

   D. Input pattern


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B. Feedback

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13.  .............is a closed loop system


   A. Auto-pilot for an aircraft

   B. Direct current generator

   C. Car starter

   D. Electric switch


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A. Auto-pilot for an aircraft

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14.  On which of the following factors does the sensitivity of a close loop system to gain changes and load disturbances depend ?


   A. Frequency

   B. Loop gain

   C. Forward gain

   D. All of the above


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D. All of the above

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15.  A control system in which the control action is somehow dependent on the output is known as


   A. Closed loop system

   B. Semiclosed loop system

   C. Open system

   D. None of the above


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A. Closed loop system

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