In a 4–20 mA level transmitter calibrated for a span of 0 to 5 meters, what liquid level corresponds to a current of 12 mA?
Question 2
In Ziegler–Nichols tuning for a classical PID controller, if the ultimate gain $K_u$ is 6 and the ultimate period $P_u$ is 150 seconds, what are the recommended controller parameters $K_p$, $T_i$, and $T_d$?
Question 3
Which type of control chart is most appropriate for monitoring the number of defects per constant-size sample in a food canning line?
Question 4
How does feedforward control differ from feedback control in food process automation?
Question 5
In a pneumatic control loop, what is the primary function of a valve positioner?
