Rate refers to the total flow of solution per unit of time, expressed in what unit?

Rate refers to the total flow of solution per unit of time, expressed in what unit?

• A. Gallons Per Minute
• B. Psi
• C. Liters Per Minute
• D. Bar

Answer: (A)

Flow rate is the amount of solution moving through the system per unit of time, so it must be expressed as volume per time. Units like psi or bar measure pressure, not how much liquid flows. Among the options, gallons per minute is the conventional way to express flow rate in many NFPA contexts (with liters per minute serving as the metric equivalent). Since the problem’s answer uses the US customary unit, gallons per minute is the best fit for describing the total flow of solution per minute.

Flow rate is the amount of solution moving through the system per unit of time, so it must be expressed as volume per time. Units like psi or bar measure pressure, not how much liquid flows. Among the options, gallons per minute is the conventional way to express flow rate in many NFPA contexts (with liters per minute serving as the metric equivalent). Since the problem’s answer uses the US customary unit, gallons per minute is the best fit for describing the total flow of solution per minute.