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Automatic Control Systems

Automatic Control Systems
Integral control action

May lead to oscillatory response
Neither (a) nor (b)
Both (a) and (b)
Removes offset

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Automatic Control Systems
Which dc servomotor requires strongest permanent magnet?

Slotted armature
Either A or B
Surface wound armature
Surface wound with stationary rotor

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Automatic Control Systems
For type 1 system the velocity lag error is

Inversely proportional to bandwidth of system
Independent of gain constant
Directly proportional to gain constant
Inversely proportional to gain constant

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Automatic Control Systems
A system is highly oscillatory if

Gain margin is high and phase margin is 180°
Gain margin is close to 1
Gain margin is close to 1 or phase margin is zero
Gain margin is high

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Automatic Control Systems
In root locus analysis the breakaway and break in points

None of these
Either lie on the real axis or occur in complex conjugate pairs
Always occur in complex conjugate pairs
lie on the real axis

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Automatic Control Systems
Transport lag usually exists in

Hydraulic systems and thermal systems
Pneumatic systems
Thermal, hydraulic and pneumatic systems
Thermal systems

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