Final answer:
The OSHA requirement for wearing multiple PPE items together is that they must be compatible with each other.
Step-by-step explanation:
The OSHA requirement for wearing multiple PPE items together is that they must be compatible with each other. This means that the different pieces of PPE should work well together and not interfere with the effectiveness of each other. For example, if a worker is wearing gloves and a respirator, the gloves should not hinder the proper fit and seal of the respirator.