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Automatic Control Systems
Which of the following is open loop system?
System for controlling antirocket missiles
Respiratory system of animal
Wind screen wiper
Aqualing
System for controlling antirocket missiles
Respiratory system of animal
Wind screen wiper
Aqualing
Answer
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Automatic Control Systems
In a simple on-off controller with differential gap, the magnitude of differential gap determines
Both (a) and (b)
The level of accuracy
The life of controller
Neither (a) nor (b)
Both (a) and (b)
The level of accuracy
The life of controller
Neither (a) nor (b)
Answer
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Automatic Control Systems
The sensor generally used in incremental optical encoder is
Either (a) or (b)
Photodiode
LED
LCD
Either (a) or (b)
Photodiode
LED
LCD
Answer
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Automatic Control Systems
In a two phasor servomotor, the direction of rotation of the rotating field depends on
None of these
Both magnitude and phase relationship of voltages applied to the two stator windings
Phase relation of voltages applied to the two stator windings
Magnitudes of voltages applied to the two stator windings
None of these
Both magnitude and phase relationship of voltages applied to the two stator windings
Phase relation of voltages applied to the two stator windings
Magnitudes of voltages applied to the two stator windings
Answer
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Automatic Control Systems
Magnetic amplifier is used for
Voltage amplification
Frequency amplification
Power amplification
Current amplification
Voltage amplification
Frequency amplification
Power amplification
Current amplification
Answer
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Automatic Control Systems
For a stable system having two or more gain crossover frequencies the phase margin is measured at the highest crossover frequency.
False
True
False
True
Answer
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