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Automatic Control Systems

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

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

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Automatic Control Systems
DC tachogenerator can be used in

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

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Automatic Control Systems
A system is highly oscillatory if

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

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Automatic Control Systems
M circles are symmetrical with respect to

Real and imaginary axis
M = 1 straight line and real axis
M = 1 straight line
M = 1 straight line and imaginary axis

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

Load cell
Strain gauge
Thermistor
Synchro

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

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

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