What are the two types of confined spaces?

What are the two types of confined spaces?

• A. Non-permit and permit required
• B. Hazardous and non-hazardous
• C. Temporary and permanent
• D. Supervisory and worker-managed

Answer: (A)

Confined spaces are grouped by whether a formal entry permit is required due to hazards inside. The two types are permit-required confined spaces, which have actual or potential hazardous atmospheres or other serious risks (such as configurations that could trap a worker, engulfment hazards, or other dangerous conditions), and non-permit confined spaces, which are confined and have restricted entry/exit but do not contain hazards that would trigger a permit. Because of the hazards, permit-required spaces need a written permit, continuous monitoring, isolation from hazard sources, ventilation, an attendant, and a rescue plan. Non-permit spaces don’t require that permit, though safe entry practices are still important. The other options miss the safety-permit relationship and aren’t how these spaces are classified.

Confined spaces are grouped by whether a formal entry permit is required due to hazards inside. The two types are permit-required confined spaces, which have actual or potential hazardous atmospheres or other serious risks (such as configurations that could trap a worker, engulfment hazards, or other dangerous conditions), and non-permit confined spaces, which are confined and have restricted entry/exit but do not contain hazards that would trigger a permit. Because of the hazards, permit-required spaces need a written permit, continuous monitoring, isolation from hazard sources, ventilation, an attendant, and a rescue plan. Non-permit spaces don’t require that permit, though safe entry practices are still important. The other options miss the safety-permit relationship and aren’t how these spaces are classified.