Engineering Quantitative Aptitude English Reasoning General Knowledge Coding Others

Quiz: Transfer Function-LCS

To View Tricks: Login Required

Number of Questions: 18

Question: 16 -

The open loop DC gain of a unity negative feedback system with closed –loop transfer function
(s+4)/(s2+7s+13) is

 

Options:

  1. 13

  2. 4/9

  3. 4/13

  4. 4

    5. Answer:

    4/9
    Solution not available.

Question: 17 -

Despite the presence of negative feedback, control systems still have problems of instability because the

Options:

  1. dynamic equations of the systems are not known exactly

  2. system has large negative phase angle at high frequencies

  3. mathematical analysis involves approximations

  4. components used have nonlinearities

    5. Answer:

    system has large negative phase angle at high frequencies
    Solution not available.

Question: 18 -

Negative feedback in a closed-loop control system DOES NOT

Options:

  1. improve disturbance rejection

  2. reduce sensitivity to parameter variation

  3. reduce the overall gain

  4. reduce bandwidth

    5. Answer:

    reduce bandwidth
    Solution not available.