What best defines a "confined space"?

A "confined space" is best defined as a space with limited entry and exit points that is not designed for continuous human occupancy. This definition highlights two critical aspects: restriction of access and the potential hazards present due to the enclosed nature of the space.

Confined spaces are often found in various industries and can include areas like storage tanks, silos, and tunnels. The limited access can pose significant risks, such as difficulty in evacuation during emergencies and potential exposure to hazardous atmospheres, which may include toxic gases or inadequate oxygen.

The other options do not accurately reflect the definition of a confined space. An open area designed for human activities or a large room with no ventilation are not confined spaces because they do not possess the restrictive characteristics that define a confined space. A space with multiple access routes also does not qualify, as the lack of limitation in entry and exit points is contrary to the fundamental characteristics of a confined space.