Final answer:
The recommended roller position for the least volume is the bottom roller position.
Step-by-step explanation:
Roller Positions and Volume
In roller systems, the position of the rollers can affect the volume of the material being processed. In general, the bottom roller position is recommended for the least volume.
The bottom roller position allows for the material to pass through the smallest gap between the rollers, resulting in less material being processed. This is often desirable when wanting to reduce the volume of a substance.
On the other hand, the top roller position would allow for the largest volume as it creates the largest gap for the material to pass through.