It is required to control the volume of the contents in the jacketed reactor shown in the figure.

Which one of the following schemes can be used for feedback control?

1. Measure $L101$ and manipulate valve $V-2$
2. Measure $T101$ and manipulate valve $V-1$
3. Measure $L101$ and manipulate valve $V-3$
4. Measure $F101$ and manipulate valve $V-1$
in Others
edited