Performance should include following all required safety procedures and protocols to include

undergoing safety instruction and testing prior to operating power tools, machinery, or equipment
explaining hazards associated with grinding operations
- high speed flying particles
- dust or fume inhalation
- kickback, fires, and explosions
- electrical shock, cuts, and abrasions
- ear damage resulting from noise
- musculoskeletal disorders resulting from repetitive motion and awkward work positions
inspecting tools and components prior to use and operating tools according to manufacturer instructions
using the required PPE
selecting the correct tools and equipment (e.g., ensuring the RPM [rotations per minute] rating of the disc/blade is higher than that of the angle grinder)
applying safety procedures, guidelines, protocols, and manufacturer specifications (e.g., adjusting guards to deflect flying particles away from the operator; using an 180° guard between operator and wheel).

Process/Skill Questions:

Where should angle grinders not be used?
What can one do to ensure angle grinders are used safely?
Why should grinders be checked for defective wheels, and frayed or damaged electrical cords?
How does one perform a “ring test”?
Why is it important to only replace accessories with those recommended by the manufacturer?