Chemical Engineering > GATE 2024 > Process Control
Consider the control structure for the overhead section of a distillation column
shown in the figure. The composition controller (CC) controls the heavy key
impurity in the distillate by adjusting the setpoint of the reflux flow controller in a
cascade arrangement. The sign of the controller gain for the pressure controller (PC)
and that for the composition controller (CC) are, respectively,
Correct : b
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