The quantity of water flowing into an evaporative condenser basin could be expressed in what unit?

• A. Liters per hour
• B. Pounds per square inch
• C. Gallons per minute
• D. Cubic feet per minute

Answer: (C)

Water flow into the evaporative condenser basin is a rate of volume per unit time. The standard way to express this in cooling systems is gallons per minute, because it directly measures how much water is arriving each minute and is the common control and sizing unit used in refrigeration practice for makeup water. Pounds per square inch is a pressure measure, not flow. Liter per hour is a valid volume-per-time unit but not practical for the typical, real-time flow control of condenser makeup water. Cubic feet per minute could express liquid flow, but gallons per minute is the conventional unit in this field and what the exam expects.