Cascade control is___________________?
Correct answer: D. All A, B & C
- A. The continuous adjustment of the set point index of an automatic control loop by a primary(master) controller
- B. Used when changes in process conditions cause serious upsets in the controlled variable
- C. Useful to control flow from temperature
- D. All A, B & C
Explanation
In cascade control, a primary controller continuously changes the set point of a secondary controller. It is useful when disturbances can seriously upset the controlled variable, such as using temperature control to adjust a flow loop.
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