Machines that use abrasive wheels must have safety guards protecting all these parts except

Machines that use abrasive wheels must have safety guards protecting all these parts except

• A. Abrasive wheel rim
• B. Grinding spindle
• C. Adjustable tongues
• D. Work rest

Answer: (C)

On abrasive wheel machines, safety guards are there to shield you from the wheel itself and any fragments if the wheel breaks, as well as to keep your hands and clothing away from the wheel while you work. The guard must cover the wheel rim so that flying particles don’t reach you, and it also protects the area around the grinding spindle where parts can be ejecta or where a guard failure could expose you to moving components. The work rest is another area that needs to be protected because you’ll often place your hands near it while guiding the workpiece, so a guard helps prevent accidental contact with the wheel from that surface. The adjustable tongues, however, are part of the guard’s adjustable mechanism used to fit different wheel sizes; they’re not exposed wheel parts that require separate guarding beyond the main wheel guard. Thus, the adjustable tongues are the component not requiring an additional guard protection.

On abrasive wheel machines, safety guards are there to shield you from the wheel itself and any fragments if the wheel breaks, as well as to keep your hands and clothing away from the wheel while you work. The guard must cover the wheel rim so that flying particles don’t reach you, and it also protects the area around the grinding spindle where parts can be ejecta or where a guard failure could expose you to moving components. The work rest is another area that needs to be protected because you’ll often place your hands near it while guiding the workpiece, so a guard helps prevent accidental contact with the wheel from that surface. The adjustable tongues, however, are part of the guard’s adjustable mechanism used to fit different wheel sizes; they’re not exposed wheel parts that require separate guarding beyond the main wheel guard. Thus, the adjustable tongues are the component not requiring an additional guard protection.