Question 60General Subjects - Assistant Engineer

The correct answer is C) Negative feedback is used to minimize instability by pushing the system in the opposite direction as the error displacement. In a closed-loop process control system, negative feedback is used to reduce the error between the desired setpoint and the actual system output. Negative feedback works by pushing the system in the opposite direction of the error, which helps to stabilize the system and drive it towards the desired setpoint. This is because if the system output is higher than the setpoint, the negative feedback will reduce the input to bring the output back down. Conversely, if the system output is lower than the setpoint, the negative feedback will increase the input to bring the output back up. The other answer choices are incorrect because positive feedback would actually increase instability by pushing the system in the same direction as the error, and negative feedback cannot push the system in the same direction as the error.