What does GPM stand for in sprayer terminology?

• A. Gallons Per Minute
• B. Gasket Per Meter
• C. Grains Per Milliliter
• D. Gauge Pressure Measurement

Answer: (A)

GPM stands for gallons per minute, the flow rate of liquid the sprayer can deliver. This term tells you how much solution the pump pushes through the nozzle each minute. In turf spraying, knowing the flow rate helps you control how much product is applied over a given area when you pair it with your speed and the swath width. If you increase the flow rate while keeping speed and nozzle width the same, you’ll apply more chemical per area; decrease it and you’ll apply less. The other terms don’t relate to flow: gauge pressure measures how hard the liquid is being pushed (that's pressure, not volume per time), gaskets are seals, and grains per milliliter isn’t a standard sprayer flow metric.