Answer Posted / sam.r
An undesirable oscillation of appreciable magnitude,
prolonged after external stimuli disappear. hunting is the
evidence of operation at or near the stability limit.
in control valves is caused by the oscillation in the
loading pressure to the actuator caused by the instability
in the control system or the valve positioner .
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send me last 5 years questions asked in rrb chennai, for section engineer
kindly sent some demo question and answer
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