Question

what is the criteria for a guard having to be used on a machine? select the best option. guards on machines are unnecesary only if you feel like a guard is needed only if your employer decides a guard is necessary if operation exposes you to injury if you need to review this content, it can be found in the when guarding is required module of the machine guarding topic.

Explanation:

Machine guards are safety devices. Their purpose is to protect operators and other workers from hazards such as moving parts, flying debris, and electrical components. The key factor in determining if a guard is needed is the presence of a risk of injury during machine operation. It's not a matter of personal feeling (so "Only if you feel like a guard is needed" is wrong) or employer's arbitrary decision (so "Only if your employer decides a guard is necessary" is wrong). Also, guards are not unnecessary (so "Guards on machines are unnecesary" is wrong). OSHA (Occupational Safety and Health Administration) and other safety regulations emphasize that when an operation exposes workers to injury risks (e.g., from moving parts of a machine), a guard should be used.

Answer:

If operation exposes you to injury