Final answer:
Tool handles are commonly coated using dip coating, a process where the handle is immersed into a coating material to leave a uniform protective layer.
Step-by-step explanation:
The process used to place coatings on tool handles is known as B) Dip Coating. Dip coating involves immersing the tool handle into a liquid plastic or rubber coating, and then withdrawing it at a controlled rate. As the coating drips off, it leaves a uniform layer that then cures to form a solid protective and grip-enhancing surface. Dip coating is preferred for tool handles due to its ease of application and ability to create a seamless coat that is comfortable to grip.