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Control Systems

Control Systems
Which of the following is/are the example of actuator?

 Hydraulic motor
 All
 Pneumatic motor
 Electric motor

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Control Systems
Lowest critical frequency is due to pole and it may be present at the origin or nearer to the origin, then the type of network is

 LC.
 Any of the above.
 RC.
 RL.

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Control Systems
Angle condition for complimentary root locus or inverse root locus is

 ± (2q) 360°
 ± (2q + 1) 180°
 ± (2q + 1) 360°
 ± (2q) 180°

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Control Systems
A unity feedback control system has forward loop transfer function as e-Ts/s(s+1). Its phase value will be zero at frequency ω1. Which of the following equations should be satisfied by ω1?

 Tω1 = tan(ω1)
 ω1 = tan(Tω1)
 ω1 = cot(Tω1)
 Tω1 = cot(ω1)

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

 stable
 unstable
 oscillatory
 critically stable

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Control Systems
Transfer function of a control system depends on

 initial conditions of input and output.
 nature of input.
 nature of output.
 system parameters alone.

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