6. What is common between a "Feedforward" controller and a "Cascade" controller? (2) a. Both use process models linked to process disturbance b. Both have two sensors and two control elements c. Both have process gains and time constants about the same magnitude d. The Feedforward controller is a form of cascade control 7. Which has a higher Capital Expense (CAPEX), a Cascade controller, a Feedforward controller, a Feedback controller or a Decoupler? (2) a. Cascade controller compared to a Feedback controller; b. Feedforward controller compared to a Feedback controller; c. A Feedback controller compared to a Cascade controller. d. A Decoupler controller with the work required to collect data to develop process models for all cross control interactions compare to a simple Feedforward controller. e. Cascade controller with one more sensor than a Feedforward controller. 8. What does SOPDT mean and is an SOPDT model always more accurate than a FOPDT model (why or why not)? (4) 9. What control parameter characterizes process responsiveness and how does process responsiveness relate to the magnitude of this parameter (pick best answer)? (4) a. Process Gain, larger values of result produce more aggressive response to set point changes. b. Process Time Constant, smaller values delay process response thus reduce process responsiveness. c. Decay Ration, larger values normally indicate it takes a process less time to reach the new DLO condition following a set point change thus a larger Decay Ratio may imply more oscillation which also may indicate greater process responsiveness. d. Settling Time; smaller values imply the system takes longer to reach a new DLO following a set point change which indicates greater process responsiveness 10. When you increase the controller output and the process variable decreases, what sign does the process gain have and what type of a process is this