automatic-control-system-mcqs - Set (4)

Correct Answer: Orange && Worng Answer: Red

1. Traffic light system is the example of :

  • (A). Open loop system
  • (B). Closed loop system
  • (C). Both (a) and (b)
  • (D). None of these
    • View Answer

    Explanation: Not Avilable

    2. The gain margin of a second order system is

  • (A). Zero
  • (B). Infinite
  • (C). One
  • (D). Two
    • View Answer

    Explanation: Not Avilable

    3. The most powerful controller is :

  • (A). PD controller
  • (B). PI PI contoller
  • (C). PID controller
  • (D). None of these
    • View Answer

    Explanation: Not Avilable

    4. A control system with excessive noise, is likely to suffer from

  • (A). Saturation in amplifying stages.
  • (B). Loss of gain
  • (C). Vibrations
  • (D). Oscillations
    • View Answer

    Explanation: Not Avilable

    5. The most commonly used input signal(s) in control system is/are

  • (A). Step function
  • (B). Ramp or velocity function
  • (C). Accelerating function
  • (D). All of the above
    • View Answer

    Explanation: Not Avilable

    6. When the gain K is increased the system become :

  • (A). More stable
  • (B). Less stabe
  • (C). Unstable
  • (D). None of these
    • View Answer

    Explanation: Not Avilable

    7. An ideal potentiometer should have :

  • (A). Zero resolution
  • (B). Infinite resolution
  • (C). A fime wire
  • (D). A thick wire
    • View Answer

    Explanation: Not Avilable

    8. A static variable approach can be applied to _____ system

  • (A). Time variant
  • (B). Non linear
  • (C). Linear and time invariant
  • (D). All of the above
    • View Answer

    Explanation: Not Avilable

    9. The transfer function of a system is given as 100/(S²+20S+100), The system is

  • (A). An over damped system
  • (B). A critically damped system
  • (C). An under damped system
  • (D). An unstable system
    • View Answer

    Explanation: Not Avilable

    10. For handling multiple input multiple output system which one of the following is used :

  • (A). State variable approach
  • (B). Bode plot
  • (C). Nyquist plot
  • (D). Rootlocus technique
    • View Answer

    Explanation: Not Avilable

    11. Phase margin of a system is used to specify :

  • (A). Relative stability
  • (B). Absolute stability
  • (C). Time response
  • (D). Steady state error
    • View Answer

    Explanation: Not Avilable

    12. When the input frequency is varied from zero to infinity causing variations in magnitude and phase angle, the traced locus by phaser is called :

  • (A). Bode plot
  • (B). Polar plot
  • (C). Root locus
  • (D). Nyquist plot
    • View Answer

    Explanation: Not Avilable

    13. A system with gain margin close to unity or a phase marigin close to zero is :

  • (A). Highly stable
  • (B). Oscillatory
  • (C). Highly unstable
  • (D). None of these
    • View Answer

    Explanation: Not Avilable

    14. If the bandwidth of a system is increased the system response will

  • (A). Remain unaffected
  • (B). Become faster
  • (C). Become slower
  • (D). None of these
    • View Answer

    Explanation: Not Avilable

    15. The characteristic equation of a feedback control system is 2S^4+S³+3S²+5S+10=0. The number of roots in the right-half S plane is :

  • (A). Zero
  • (B). 1
  • (C). 2
  • (D). 3
    • View Answer

    Explanation: Not Avilable

    16. For a stable system, the phase margin :

  • (A). Is always positive
  • (B). Is always negative
  • (C). May be positive and negative
  • (D). None of these
    • View Answer

    Explanation: Not Avilable

    17. A system has a single pole at the origin, its impulse response is :

  • (A). Constant
  • (B). Ramp
  • (C). Decaying exponential
  • (D). Oscillatory
    • View Answer

    Explanation: Not Avilable

    18. Gain margin in the factor by which the system gain can be increased to drive it to the verge of :

  • (A). Stability
  • (B). Instability
  • (C). Oscillation
  • (D). Critical damping
    • View Answer

    Explanation: Not Avilable

    19. Which one of the following element is not required in an automatic control system.

  • (A). Error detector
  • (B). Sensor
  • (C). Oscillator
  • (D). All of the above
    • View Answer

    Explanation: Not Avilable

    20. The largest error between reference input and output during the transient period is called

  • (A). Peak error
  • (B). Transient overshoot
  • (C). Peak overshoot
  • (D). Transient deviation
    • View Answer

    Explanation: Not Avilable

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