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Automatic Control Systems

Automatic Control Systems
The complicated shapes in the polar plots are only due to time constants in the numerator of transfer functions.

True
False

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Automatic Control Systems
Transport lag usually exists in

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

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Automatic Control Systems
The poles with greater displacement from the real axis correspond to

Stable response
Lower frequencies of oscillations
Higher frequencies of oscillations
Unbounded output

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Automatic Control Systems
A system is highly oscillatory if

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

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

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

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Automatic Control Systems
The effect of adding poles and zeros can be determined quickly by

Nichols chart
Root locus
Nyquist plot
Bode plot

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