Which term describes the coefficient used to describe flow resistance in piping?

• A. Lateral
• B. Waterborne Diseases
• C. Pathogens
• D. C-Factor

Answer: (D)

Flow resistance in piping is captured by a coefficient that summarizes how the pipe and its fittings impede flow. This coefficient, known as the C-Factor, is a dimensionless quantity used in hydraulic calculations to relate flow to pressure loss or head loss. A higher C-Factor indicates more resistance for the same flow, reflecting factors like pipe roughness, diameter, length, and fittings. The other options don’t describe a resistance coefficient for flow: one is a directional term, and the other two relate to health issues rather than hydraulics. So the term that best describes flow resistance in piping is C-Factor.