Control System Multiple Choice Questions and Answers


21.  Backlash in a stable control system may cause


   A. Underdamping

   B. Overdamping

   C. High level oscillations

   D. Low level oscillations


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D. Low level oscillations

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22.  How can be the bandwidth of a control system be increased?


   A. By the use of phase lead network

   B. By the use of phase lag network

   C. By the use of both phase lag and phase lead network

   D. By the use of cascade amplifiers in the system


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A. By the use of phase lead network

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23.  A phase lag compensation will


   A. Improve relative stability

   B. Increase the speed of response

   C. Increase bandwidth

   D. Increase overshoot


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A. Improve relative stability

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24.  An effect of phase-lag compensation on servosystem performance is that


   A. For a given related stability the velocity constant is increased

   B. For a given related stability the velocity constant is decreased

   C. The bandwidth of the system is increased

   D. The time response is made faster


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A. For a given related stability the velocity constant is increased

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25.  Presence of nonlinearities in a control system tends to introduce


   A. Transient error

   B. Instability

   C. Steady state error

   D. All of these


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D. All of these

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