A portable grinder is considered a _____.

A portable grinder is classified as a power tool due to its powered operation that enables it to perform tasks such as cutting, grinding, or polishing materials. Power tools are defined by their ability to use an external source of energy—electricity, batteries, or compressed air—to assist the user in completing work more efficiently and effectively compared to manual tools.

In contrast, hydraulic tools are primarily powered by hydraulic fluid and pressure, which does not apply to a portable grinder. Plumbing tools typically refer to devices and implements designed specifically for tasks related to plumbing, such as pipes, fittings, and fixtures, which do not encompass the use or function of a grinder. Therefore, while a portable grinder serves a distinct role in various applications, it is most accurately categorized as a power tool, making that the correct classification.