Answer :
Final answer:
A stationary grinder with two wheels is known as a bench grinder, while rotary bits used to remove rough edges are called burr bits. These tools are essential in workshops for various grinding and polishing tasks. Understanding these tools enhances skills in metal and wood working.
Explanation:
Grinding Tools and Their Uses
A stationary grinder that has two wheels for grinding, removing rust, and buffing metal is best referred to as a bench grinder (Option c). These tools are designed for use in a workshop environment where precise and controlled grinding is essential, often featuring two different wheels suited for various tasks such as grinding, polishing, or buffing. The wheels can be made from different materials, allowing for specialized use depending on the materials being worked on, such as metals or plastics.
Regarding the second part of the question, special rotary bits that can be used on some grinders to remove rough edges from the inside and outside of pipes and other objects are commonly known as burr bits (Option a). These bits are characterized by their pointed or serrated blades that effectively grind away material, making them ideal for achieving smooth finishes in metalworking and woodworking applications.
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