Which of the following is a type of shore?

• A. Bar
• B. Aluminum hydraulic
• C. Truss
• D. Sand

Answer: (B)

Shoring is the system used to prop up trench walls during excavation, preventing collapses. Aluminum hydraulic shores are a specific type of shoring that uses hydraulic pressure to push end plates against the trench walls, providing adjustable, reliable support. They’re lightweight, quick to install, and can be moved and re-angled easily as the trench work progresses, which makes them a common modern choice for protecting workers.

The other options aren’t types of shores: a bar isn’t a shore, sand is a material used for backfill or stabilization but not a shore system, and while a truss is a framework used in various supports, it isn’t the term used for a type of trench shore in this context.