When planning a pipeline flush, which two factors primarily determine how long the flush should take?

• A. Length of pipe and flow rate
• B. Pipe diameter and water temperature
• C. Ambient humidity and pressure
• D. Color and odor of water

Answer: (A)

The duration of a pipeline flush is set by how much water must be displaced and how quickly you push it through. The length of the pipe determines the total volume inside that needs to be replaced, so longer runs require more time. The flow rate decides how much water passes through per unit of time, so a higher flow rate shortens the flush while a lower flow rate lengthens it. Temperature, humidity, ambient pressure, and the water’s color or odor don’t determine how long the flush takes; they relate to water quality, not duration.