Question

what are two of the most important pieces of ppe when using a grinder? rubber footwear hard hat face mask ear protection gloves safety glasses

Explanation:

When using a grinder, safety glasses protect eyes from flying debris and an ear - protection device guards against the loud noise generated by the grinder. Rubber footwear, hard hat, face mask, and gloves are less crucial compared to eye and ear protection for the immediate hazards of a grinder.

Answer:

ear protection, safety glasses