Question 58General Subjects - Assistant Engineer

The correct answer is B) Feedback. In a closed-loop process control system, the term used to describe the action of measuring the difference between the actual result and the desired result, and using that difference to drive the actual result toward the desired result, is called feedback. Feedback is a key component of closed-loop control systems, as it allows the system to continuously monitor and adjust its output to maintain the desired outcome. The other options are incorrect because: A) Gain refers to the amplification or attenuation of a signal, not the process of measuring and adjusting based on the difference between actual and desired results. C) Instability refers to the tendency of a system to oscillate or become unstable, not the feedback mechanism itself. D) Dead band refers to a range of input values where the system does not respond, not the feedback process.