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

Explanation:

Machine guards are required as a workplace safety measure to protect workers from harm. The core criterion is whether operating the machine creates a risk of injury, as this is the fundamental purpose of machine guarding. The other options are incorrect: guards are not unnecessary, need is not based on personal preference, and it is not solely up to the employer (regulatory standards prioritize injury risk).

Answer:

If operation exposes you to injury