What is the definition of a confined space?

• A. A space with restricted ventilation
• B. Only underground spaces
• C. Has openings big enough for entry and exit
• D. An area used for open storage

Answer: (C)

A confined space is defined by having a way to enter and exit through openings, even though it isn’t meant for regular occupancy and access is restricted. The option that points to openings large enough for entry and exit focuses on that crucial access feature—if a space can be entered and left through an opening, it fits the basic idea of a confined space. The other statements don’t pin down what makes a space confined: restricted ventilation can occur in many spaces but doesn’t by itself define confinement; confinement isn’t limited to underground spaces; and open storage areas aren’t defined by access restrictions.