CFS stands for which of the following?

• A. Cubic feet per minute
• B. Cubic feet per second
• C. Cubic meters per second
• D. Cents per square foot

Answer: (B)

CFS denotes flow rate in U.S. customary units, specifically how much water passes a point each second. The “C” stands for cubic feet, and the “S” stands for per second, so it means cubic feet per second. This is a common way to express discharge in pumps, pipes, and streams. For example, 5 CFS means five cubic feet of water flow every second (about 37.4 gallons per second, since one cubic foot is ~7.48 gallons).

The other options don’t fit: cubic feet per minute would be abbreviated CFM, not CFS. Cubic meters per second uses SI units (m^3/s). Cents per square foot is a cost measure and unrelated to flow.