What is a pitot gauge used for?

A pitot gauge is specifically designed to measure the flow pressure of fluids, particularly in firefighting operations, where it's essential to understand water flow rates in hoses and nozzles. The primary function of this tool is to assess the velocity pressure of the water flowing through a pipe or hose, which is expressed in psi (pounds per square inch).

Knowing the flow pressure is crucial for firefighters because it helps them determine if the water supply is adequate for effective firefighting tactics. This measurement allows them to adjust equipment and hose configurations to ensure optimal performance and safety while combating fires.

In the context of the other options, measuring temperature, smoke density, or fire resistance would require different types of instruments that are not suitable for flow pressure assessment. Therefore, the pitot gauge’s core functionality aligns perfectly with measuring flow pressure in psi.