What characteristics define a confined space?

The correct definition of a confined space is characterized by having limited openings for entry and exit, along with being large enough for a person to enter and perform work. This definition aligns closely with the criteria used in occupational safety and health regulations.

In a confined space, the limited openings can pose significant hazards, such as reduced access for escape in emergencies and difficulties in ventilating the space adequately, which can result in dangerous atmospheric conditions. Although having an adequate size for entry is a criterion, it is insufficient on its own without considering the restrictions on access and exit.

The other options present features that do not fundamentally define a confined space. For example, being equipped with ample ventilation systems or being designed for continuous human occupancy may contribute to safety, but they are not essential characteristics that classify an area as a confined space. In summary, the defining attributes revolve around accessibility and potential hazards, with limited openings for exit playing a crucial role in illustrating the risks involved.