What distinguishes a confined space from a non-confined area?

• A. It has limited entry/exit and is not designed for continuous occupancy.
• B. It is designed for continuous occupancy.
• C. It must be outdoors.
• D. It has limited entry/exit, is not designed for continuous occupancy, and may contain hazardous atmospheres.

Answer: (D)

The space is defined as confined when it has limited or restricted means of entry and exit, is not designed for continuous occupancy, and may contain hazardous atmospheres. This combination of features is what sets it apart from a non-confined area, which wouldn’t meet those criteria.

The correct choice reflects all three aspects: limited entry/exit, not intended for people to stay in there for long periods, and the potential for hazardous atmospheres. The other options miss at least one element: one ignores the possibility of hazardous atmospheres, another claims it’s designed for continuous occupancy, and another requires it to be outdoors—none of which accurately defines a confined space.