Increasing the rake angle of the tool is the correct answer for reducing power consumption in turning. The rake angle refers to the angle between the cutting edge of the tool and a reference plane (usually perpendicular to the workpiece surface). By increasing the rake angle, several benefits can be achieved, leading to a reduction in power consumption.

1. Reduced Friction:
Increasing the rake angle of the tool reduces the contact area between the tool and the workpiece. This results in a decrease in friction, as there is less surface area for the chips to rub against. With reduced friction, less energy is required to overcome this resistance, leading to a decrease in power consumption.

2. Improved Chip Formation:
A larger rake angle allows for better chip formation during the cutting process. The chips are more likely to form and flow smoothly, rather than being forced against the tool or workpiece. This reduces the cutting forces required and, subsequently, the power consumed during the turning operation.

3. Lower Cutting Temperatures:
Increasing the rake angle also helps in lowering cutting temperatures. A higher rake angle promotes better chip evacuation, which prevents the chips from accumulating and generating excessive heat. Lower cutting temperatures help to reduce tool wear and prolong tool life, resulting in more efficient cutting and reduced power consumption.

4. Enhanced Cutting Performance:
A higher rake angle improves the cutting performance by reducing the cutting forces and improving the surface finish of the workpiece. With reduced cutting forces, less power is required to overcome the resistance during turning. Additionally, a better surface finish reduces the need for additional finishing operations, further reducing power consumption.

5. Improved Tool Life:
Increasing the rake angle can also extend the tool life. With a larger rake angle, the cutting forces are distributed more evenly along the cutting edge, reducing the likelihood of chipping or breakage. This allows the tool to last longer, reducing the frequency of tool changes and overall power consumption.

In conclusion, increasing the rake angle of the tool in turning operations can significantly reduce power consumption. It reduces friction, improves chip formation, lowers cutting temperatures, enhances cutting performance, and prolongs tool life. These benefits contribute to a more efficient turning process, requiring less power to achieve the desired results.