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Automatic Control Systems

Automatic Control Systems
Nichol’s chart is symmetric about – 180° axis.

False
True

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Automatic Control Systems
If poles lie in first quadrant, damping ratio is

Zero
less than 1
More than 1
1

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Automatic Control Systems
Transport lag usually exists in

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

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Automatic Control Systems
In a simple on-off controller with differential gap, the magnitude of differential gap determines

Neither (a) nor (b)
The life of controller
Both (a) and (b)
The level of accuracy

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Automatic Control Systems
Gain margin and phase margin can be determined from Bode plots as well as Nyquist plot.

True
False

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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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