Certified Safety Professional Exam 2025 – 400 Free Practice Questions to Pass the Exam

The measurement technique primarily used to determine air pressure within duct systems is based on the principles of fluid dynamics, specifically with tools like the Pitot tube. A Pitot tube is designed to measure fluid flow velocity and, by extension, pressure. When placed in a duct system, it can capture static and dynamic pressure simultaneously, allowing for the calculation of the total pressure, which is crucial for understanding airflow within that system.

In the context of ductwork, knowing the air pressure helps in assessing the effectiveness of the ventilation system, ensuring that it is operating within design specifications. The Pitot tube can provide critical data that helps in diagnosing issues related to airflow, such as restrictions or leaks, thus serving as an essential tool for HVAC professionals.

It is important to recognize that while static and dynamic pressure measurements are also relevant for assessing airflow characteristics, the most comprehensive understanding of air pressure in a duct system comes from the use of a Pitot tube, which integrates both types of pressure measurements and directly relates them to fluid velocity.