Which of the following items is typically contained in a shoring kit?

A shoring kit is specifically designed for supporting structural elements during damage control operations, particularly in maritime settings. A carpenter's square is a crucial tool included in such a kit as it allows personnel to ensure that shoring is done accurately and to precise angles. This tool helps in measuring and marking out wood for struts or shores, ensuring they effectively support surfaces that may have become unstable or compromised.

The hydraulic pump, while it is a valuable piece of equipment in damage control scenarios, is not a standard item in every shoring kit, as shoring primarily focuses on the manual support of structures. Electrical safety gloves are important for operations involving electrical hazards but are not specific to shoring tasks. Lastly, a fire extinguishing agent is critical in firefighting situations but is outside the scope of tools necessary for structural support. These items serve their specific purposes but do not contribute directly to the function of a shoring kit in the way that a carpenter's square does.