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Control Systems

Control Systems
The DC gain of a system represented by the transfer function 12 / {( s + 2 )( s + 3 )} is

 10.
 5.
 2.
 1.

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Control Systems
Find the corner frequency for the following transfer function? G(s) = 1/(s+2)

 4 rad/s
 1/2 rad/s
 1/4 rad/s
 2 rad/s

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Control Systems
The error of a system to a ramp input is 1/5, if the type of the system is decreased by one, then the error of unit step input is

 0.2
 6/5
 5
 0.167

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

 Electric motor
 Pneumatic motor
 All
 Hydraulic motor

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Control Systems
Which of the following combinations is/are correct electrical analogous elements in force-current analogy?

 Velocity (v) ----------------- Voltage (V)
 Force (f) --------------------- Current (i)
All of these
 Spring element (K) --------- Inverse inductance (1/L)

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

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