Which of the following is a layout determination?

• A. Determining Proper Sprinkler Spacing
• B. Determining Zoning
• C. Determining Evapotranspiration
• D. Determining Rainfall

Answer: (A)

The main idea here is how the physical arrangement of the irrigation system is planned, especially where and how far apart sprinkler heads are placed to cover the landscape. Determining proper sprinkler spacing is a layout decision because it directly defines the spatial arrangement of the system—the actual footprint of coverage, head-to-head distances, and how the landscape will be distributed by the hardware on the ground. Getting spacing right ensures uniform distribution, minimizes overspray and dry spots, and influences how pipes and zones are laid out.

The other items aren’t layout choices. Zoning concerns dividing the site into areas for control and scheduling, which is more about how the system operates rather than how it is laid out physically. Evapotranspiration and rainfall are data inputs used to size and schedule irrigation, not decisions about the physical arrangement of components.