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Automatic Control Systems

Automatic Control Systems
For a stable system having two or more gain crossover frequencies the phase margin is measured at the highest crossover frequency.

True
False

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

1
less than 1
Zero
More than 1

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Automatic Control Systems
DC tachogenerator can be used in

Speed control system
Both A and B
Position control system
Neither A nor B

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Automatic Control Systems
Which of the following is used to obtain output position in a position control system?

Strain gauge
Thermistor
Load cell
Synchro

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

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

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

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

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