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Automatic Control Systems

Automatic Control Systems
The relative stability of a system is given by

Gain margin alone
Both phase and gain margins
Either (a) or (b)
Phase margin alone

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

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

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Automatic Control Systems
For any transfer function, the constant phase angle loci are

A family of circles
Either (a) or (b)
A family of straight lines
Neither (a) nor (b)

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Automatic Control Systems
The addition of a pole to the open loop transfer function pulls the root locus

To the left and making the system more stable
Towards right or left depending on the position of new pole
To the right
None of these

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Automatic Control Systems
Which dc servomotor requires strongest permanent magnet?

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

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Automatic Control Systems
Transport lag usually exists in

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

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