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← ScienceWhich outcome results when elevated boiler pressure reduces the proportional controller ‘gain’ Kp?
A)Increased oscillatory response to steam demand✓
B)Decreased integral time constant for corrections
C)Faster recovery from process disturbances
D)Reduced measurement noise sensitivity overall
💡 Explanation
An inaccurate pressure reading causes control deviation. A lower proportional gain due to instrumentation error leads to less aggressive control, because the controller’s attempt to maintain pressure oscillates around setpoint rather than quickly converging. Therefore, gain reduction leads to instability, rather than increased precision.
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