In measuring air flow, what does FPM stand for?

In measuring air flow, what does FPM stand for?

• A. Feet per Minute
• B. Foot per Minute
• C. Feet per Meter
• D. Flux per Minute

Answer: (A)

FPM is a velocity unit for air flow. It stands for Feet per Minute, describing how fast air moves through a duct. This is different from volume flow, which is measured in cubic feet per minute (CFM). The other options aren’t standard for this context: singular “Foot per Minute” isn’t used, “Feet per Meter” isn’t a typical air-flow unit, and “Flux per Minute” isn’t a conventional way to express air movement. When you know the velocity and the duct’s cross-sectional area, you can find volume flow with CFM = FPM × area (in square feet).

FPM is a velocity unit for air flow. It stands for Feet per Minute, describing how fast air moves through a duct. This is different from volume flow, which is measured in cubic feet per minute (CFM). The other options aren’t standard for this context: singular “Foot per Minute” isn’t used, “Feet per Meter” isn’t a typical air-flow unit, and “Flux per Minute” isn’t a conventional way to express air movement. When you know the velocity and the duct’s cross-sectional area, you can find volume flow with CFM = FPM × area (in square feet).