What is the main characteristic that defines a confined space?

• A. Small physical size
• B. High voltage inside
• C. Unventilated
• D. Limited access and egress

Answer: (D)

A confined space is defined by limited means of entry and exit, which makes access and egress difficult. That restricted access is the defining feature, regardless of the space’s size or ventilation. The presence of hazards like high voltage inside or being unventilated can exist, but they do not define a space as confined on their own. So, the option describing limited access and egress best captures what makes a space confined.