Minnesota Class D Water Operator Certification Practice Exam

The point of application for hydrofluosilicic acid in a horizontal pipe should be placed in the upper half of the pipe. This placement is critical for a couple of reasons. When the acid is introduced into the upper section, it is more likely to mix efficiently with the water flowing through the pipe.

This upper positioning takes advantage of the movement of the water as it flows, which helps ensure that the hydrofluosilicic acid is evenly distributed throughout the water. If the application were to occur in the lower half or randomly, there could be inadequate mixing, resulting in an uneven distribution of the chemical and potentially affecting the water treatment process and the desired fluoride levels in the water supply.

Proper application in the upper half is, therefore, essential for achieving optimal chemical dosing and maintaining water quality standards.