Question 243General Subjects - 1st Asst/Chief

70% to pass

When tuning a Proportional-Integral-Derivative (PID) controller/loop, one should know/understand the influence of each action component on the loop. Which description of a component is correct?

AIntegral - component in which the input is proportional to the output.
BProportional - component in which there is a linear relationship between set point and input.
CDerivative - component in which the input is proportional to the rate of change of the output.
DProportional - component in which there is a linear relationship between output and input.
AI Explanation

The correct answer is D) Proportional - component in which there is a linear relationship between output and input. This is correct because the proportional component of a PID controller is characterized by a linear relationship between the output and the input. The output of the proportional component is directly proportional to the difference between the set point and the measured value (the error). This linear relationship allows the controller to respond to changes in the error and make appropriate adjustments to the input to the system. The other options are incorrect because they do not accurately describe the characteristics of the PID controller components. The integral component integrates the error over time, and the derivative component is proportional to the rate of change of the error, not the output.

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