Which of the following statements is correct for a system with gain margin close to unity or a phase margin close to zero ?

Related Mcqs:

1. 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

2. Phase margin of a system is used to specify which of the following ?

   A. Frequency response
   B. Absolute stability
   C. Relative stability
   D. Time response

3. Which of the following statements is not necessarily correct for open control system ?

   A. Input command is the sole factor responsible for providing the control action
   B. Presence of non-linearities causes malfunctioning
   C. Less expensive
   D. Generally free from problems of non-linearities

4. Which of the following statements is correct for any closed loop system ?

   A. All the co-efficients can have zero value
   B. All the co-efficients are always non-zero
   C. Only one of the static error co-efficients has a finite non-zero value
   D. None of the above

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

   A. Frequency
   B. Loop gain
   C. Forward gain
   D. All of the above

6. Zero initial condition for a system means_______________?

   A. input reference signal is zero
   B. zero stored energy
   C. ne initial movement of moving parts
   D. system is at rest and no energy is stored in any of its components

7. signal will become zero when the feedback signal and reference signs are equal?

   A. Input
   B. Actuating
   C. Feedback
   D. Reference

8. In a system zero initial condition means that______________?

   A. The system is at rest and no energy is stored in any of its components
   B. The system is working with zero stored energy
   C. The system is working with zero reference signal

9. When the initial conditions of a system are specified to be zero it implies that the system is________________?

   A. at rest without any energy stored in it
   B. working normally with reference input
   C. working normally with zero reference input
   D. at rest but stores energy

10. When the initial conditions of a system are specified to be zero it implies that the system is______________?

    A. at rest without any energy stored in it
    B. working normally with reference input
    C. working normally with zero reference input
    D. at rest but stores energy