Tennessee Wastewater Operator Practice Exam

How is system pressure calculated in relation to a blower?

1. By subtracting static from dynamic pressure

2. As the sum of the velocity component and the static component

3. By averaging inlet and outlet pressures

4. Using mechanical efficiency ratings

The correct answer is: As the sum of the velocity component and the static component

The calculation of system pressure in relation to a blower is about understanding how the air moves through the system and the various forces involved. The correct approach involves recognizing that system pressure can be determined by considering both the velocity component of the air and the static pressure component. In this context, the velocity component accounts for the speed of the airflow created by the blower, which contributes to the pressure in the system. The static component represents the pressure of the air when it is not moving, which is crucial for creating a pressure differential that enables the airflow. By summing these two components, one can effectively measure the overall system pressure that a blower generates. This comprehensive view is essential for evaluating the performance and efficiency of the blower in a wastewater treatment system.