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Automatic Control Systems
Nyquist stability criterion uses open loop frequency response characteristics.
False
True
False
True
Answer
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Automatic Control Systems
Gain margin and phase margin can be determined from Bode plots as well as Nyquist plot.
False
True
False
True
Answer
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Automatic Control Systems
Which dc servomotor requires strongest permanent magnet?
Either A or B
Surface wound with stationary rotor
Slotted armature
Surface wound armature
Either A or B
Surface wound with stationary rotor
Slotted armature
Surface wound armature
Answer
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Automatic Control Systems
The distance of poles from origin depends on
Neither A nor B
Uqndamped natural frequency
Both A and B
Damping ratio
Neither A nor B
Uqndamped natural frequency
Both A and B
Damping ratio
Answer
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Automatic Control Systems
Which of the following can be used as a rotating amplifier in a control system? 1. Amplidyne 2. Separately excited dc generator 3. Synchro 4. Self excited dc generator
1, 2 and 3
1 and 2
3 and 4
All
1, 2 and 3
1 and 2
3 and 4
All
Answer
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Automatic Control Systems
In the field controlled motor the entire damping comes from
Back emf
Motor friction and load
Field resistance
Armature resistance
Back emf
Motor friction and load
Field resistance
Armature resistance
Answer
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