Automation, Control Equipment. Test 4

What is the meaning of split-range

Several control-valves are connected to the same controller
Several controllers are connected to the same control-valve
Several control-loops for the same range
On-Off control

What is typical for a continuous control system

It is possible to predict the control mathematicallyIt is possible to predict the control mathematically
The control valve will always be changing positionv
The output signal is equal to the input signal
It is not possible to have a stable process

What is typical for a P(proportional)-controller

Very stable control
Simple maintenance
Very reliable control and easy installation
It will always be a deviation between the set-point and the process value

In a PID controller we have possibility to change the setting of the Proportional band (P), the Reset time (I) and the Rate time (D). Please indicate which curve shows the typical response to change in input, if the setting of the rate time is too short.

Figure 2.
Figure 3.
Figure 4.
Figure 1.

What is typical for a feed-forward control system

We are controlling the process inlet side
It is easy to obtain a perfect control
The process is always oscillating
We can calculate the system response mathematically

When tuning a cascade control system, where do you start

The master controller
The slave controller with the master controller in auto mode
The slave controller with the master controller in manual mode
Both at the same time

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