A confined space that may contain a hazardous atmosphere, engulf an entrant, or have other serious hazards is called what?

• A. Permit-required
• B. Non-permit
• C. Safe-space
• D. Restricted-space

Answer: (A)

A permit-required confined space is defined by the presence or potential for serious hazards that require formal controls. If a space is large enough for a person to enter, has limited ways to get in or out, and could contain a hazardous atmosphere, could engulf an entrant, or has other serious hazards, it becomes a permit-required space. That designation matters because it triggers the need for an entry permit, plus safeguards like atmospheric monitoring, isolation of nearby hazards, ventilation, PPE, an attendant, and a rescue plan.

Other terms aren’t used for this concept: a non-permit space would not have these hazards or the formal entry-permit requirements; a safe-space and a restricted-space aren’t recognized classifications for OSHA confined-space programs, so they don’t describe spaces that require the documented controls the permit-required designation implies.