A pressure tap is used to measure pressure at a point in a distribution system.

• A. Pressure
• B. Flow rate
• C. Temperature
• D. Chlorine residual

Answer: (A)

A pressure tap is a small connection into a pipe that lets a gauge or sensor read the pressure at that specific point in the system. It provides a direct measurement of pressure, which is essential for understanding how much work the water has to push against in that section and for ensuring the system maintains adequate pressure.

This is what makes it the right choice: a pressure tap is not used to measure flow rate, temperature, or chlorine residual. Flow rate requires a flow meter or other device that tracks how much water passes per unit time. Temperature needs a thermometer or temperature sensor. Chlorine residual requires a chemical analyzer or test kit. The tap itself simply exposes a path to the pipe’s pressure for measurement.