Which of the following is a hazard in permit-required confined spaces?

• A. Hazardous atmospheres
• B. Engulfment
• C. Limited means of entry
• D. All of the above

Answer: (D)

Hazards in permit-required confined spaces include hazardous atmospheres, engulfment, and limited means of entry. A hazardous atmosphere means there could be toxic gases, vapors, or oxygen levels that are too low or too high, risking unconsciousness or death. Engulfment is the danger of being surrounded or buried by loose materials or liquids, which can suffocate or trap a worker. Limited means of entry refers to narrow or obstructed openings that make entering, exiting, and especially rescuing someone more difficult. Because any one of these hazards makes a space permit-required, the option that covers all of them is the best choice.