Correct Answer: C) It opens the cooling valve while closing the heating valve.
Explanation:
If the jacket water temperature exceeds the setpoint, the controller increases its output signal to enter the upper range, which controls the cooling valve. The cooling valve opens to lower the temperature, and simultaneously, the heating valve is closed to prevent further heating.
Correct Answer: C) It opens the cooling valve while closing the heating valve.
Explanation:
If the jacket water temperature exceeds the setpoint, the controller increases its output signal to enter the upper range, which controls the cooling valve. The cooling valve opens to lower the temperature, and simultaneously, the heating valve is closed to prevent further heating.