Spray Equipment And Calibration HARD 40 CFR § 171.103(d)

Using the standard broadcast calibration formula: GPA = (GPM × 5940) / (MPH × W), where W is nozzle spacing in inches. If a boom sprayer operates at 5.0 MPH with nozzles spaced 20 inches apart, and each nozzle delivers 0.34 Gallons Per Minute (GPM), what is the application volume in Gallons Per Acre (GPA)?

Multiple Choice Options

A 10.1 GPA
B 20.2 GPA ✓ OFFICIAL VERIFIED CORRECT ANSWER
C 34.0 GPA
D 40.4 GPA
✓ LEGAL EXPLANATION & STATUTORY RATIONALE
40 CFR § 171.103(d)
Official Manual Chapter: Chapter 10: Calibration Math & Application Equipment

GPA = (0.34 GPM × 5940) / (5.0 MPH × 20 inches) = 2,019.6 / 100 = 20.196 GPA, which rounds to 20.2 Gallons Per Acre.

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