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Automatic Control Systems

Automatic Control Systems
Magnetic amplifier is used for

Voltage amplification
Power amplification
Current amplification
Frequency amplification

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Automatic Control Systems
Transport lag usually exists in

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

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Automatic Control Systems
Nichols chart consists of

Constant magnitude loci
None of these
Magnitude and phase angle loci in log-magnitude versus phase diagram
Constant phase angle loci

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

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

Thermistor
Strain gauge
Load cell
Synchro

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Automatic Control Systems
A system is highly oscillatory if

Gain margin is high
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°

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