Which statement about confined spaces is true?

• A. Confined spaces are always safe.
• B. They have limited entry/exit, are not designed for continuous occupancy, and may contain hazardous atmospheres.
• C. They are outdoors.
• D. They require no ventilation.

Answer: (B)

Confined spaces are defined by three key features that create risk: limited or restricted means of entry or exit, not being designed for continuous occupancy, and the potential presence of hazardous atmospheres. That combination means someone could be trapped or exposed to dangerous conditions if the space is entered without proper precautions, testing, and ventilation. The statement encapsulates these essential characteristics, explaining why such spaces require careful assessment and control before entry. The other ideas misstate the reality: confined spaces are not automatically safe, they can be indoors or outdoors, and they often require ventilation to ensure a safe atmosphere rather than no ventilation.