An opening in the floor, platform, or pavement that measures 12 inches or more, and through which persons may fall is a(n) ______.

• A. Floor opening
• B. Floor hatch
• C. Pit
• D. Chute

Answer: (A)

In safety terms, any opening in a floor, platform, or pavement that is 12 inches or more and through which a person could fall is called a floor opening. This term focuses on the hazard itself—the hole or gap in the walking/working surface—rather than a specific access device. A floor hatch is a type of floor opening that has a cover, but the hazard it describes is still the opening; the general term floor opening covers both open gaps and those with coverings. A pit refers to a deeper, usually enclosed space, and a chute is a passage for moving materials, not a general fall hazard in a floor. So the best match for the described situation is floor opening, which emphasizes the potential fall hazard and the need for guarding or covering.