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Control Systems

Control Systems
Based on relation between the arm impedances the filters can be categorized into how many types?

 Not classified at all.
  2.
 4.
 3.

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Control Systems
A second order control system is defined by the following equation: 4 d²c(t)/dt² + 8 dc(t)/dt + 16 c(t) = 16 u(t) The damping ratio and natural frequency for this system are respectively

 0.25 and 4 rad/s
 0.50 and 2 rad/s
 0.50 and 4 rad/s
 0.25 and 2 rad/s

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Control Systems
The low frequency and high frequency asymptotes of Bode magnitude plot are respectively -60dB/decade and -40dB/decade. What is the type of the system?

 TYPE II
 TYPE I
 TYPE 0
 TYPE III

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Control Systems
The device necessarily used for automatic temperature control in a furnace is

 Thermocouple.
 Thermostat.
 Auto-transformer.
 Any of above.

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Control Systems
The transfer function of a system is G(s) = 100/((s+1)(s+100)). For unit step input to the system the approximate settling time for 2% criterion is

 400 sec
 100 sec
 10 sec
 4 sec

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Control Systems
The unit step response of the system is 1 - e-t(1+t). Which is the system?

 unstable
 stable
 critically stable
 oscillatory

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