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

Explanation:

Machine guards are safety devices. Their purpose is to protect operators from hazards like moving parts, flying debris, etc. If a machine's operation exposes a person to injury (e.g., having unprotected moving parts that could catch clothing or limbs), a guard is necessary. The first option is incorrect as guards are often necessary. The second option is too subjective (not based on objective safety criteria). The third option ignores safety regulations - it's not just up to the employer's decision but based on hazard exposure. The fourth option aligns with the principle that guards are required when there is an injury - exposure risk during operation.

Answer:

If operation exposes you to injury