Minnesota Boiler License Practice Exam 2025 - Free Boiler License Practice Questions and Study Guide

The Bourdon gauge is the most commonly used device for measuring pressure in a boiler system due to its reliability, simplicity, and wide range of applicability. It operates based on the principle of elastic deformation; as the pressure inside the boiler increases, the Bourdon tube, which is typically a curved metal tube, straightens out. This movement is linked to a dial that indicates the pressure level.

Bourdon gauges are favored in many industrial applications, including boiler operations, because they provide accurate readings and can handle high-pressure environments effectively. They also require minimal maintenance and offer a direct reading without the need for additional calibration or components.

While other options like manometers and digital pressure sensors are also used for pressure measurement, they may be less common in certain boiler setups. Manometers, for instance, are typically used for lower pressure applications, and while digital pressure sensors offer advanced features and ease of reading, they may not be as widely implemented in all boiler systems. Diaphragm gauges serve specific purposes, often in applications where precise measurement of small pressure changes is necessary, but they do not match the overall prevalence of the Bourdon gauge in most boiler configurations.