An open excavation that usually does not require shoring is classified as a(n) ________.

An open excavation that usually does not require shoring is classified as a(n) ________.

• A. Trench
• B. Pit
• C. Shaft
• D. Quarry

Answer: (B)

Open excavations are categorized by shape and the protective measures they typically require. A trench is a long, narrow cut where the sides can collapse, so it normally needs a protective system like shoring. A shaft is a vertical or near-vertical opening, often associated with mining. A quarry is an open pit for extracting rock, usually large and broad in shape. An open excavation that generally doesn’t require shoring is a pit, since it’s simply a hole in the ground not constrained in a way that creates the same collapse risk as a trench. So the best fit is pit.

Open excavations are categorized by shape and the protective measures they typically require. A trench is a long, narrow cut where the sides can collapse, so it normally needs a protective system like shoring. A shaft is a vertical or near-vertical opening, often associated with mining. A quarry is an open pit for extracting rock, usually large and broad in shape. An open excavation that generally doesn’t require shoring is a pit, since it’s simply a hole in the ground not constrained in a way that creates the same collapse risk as a trench. So the best fit is pit.