Point of Connection: In an irrigation system, what is generally defined as the point of connection?

• A. The junction between the main supply and the lateral/submain lines
• B. The controller location
• C. The point where irrigation is turned on
• D. The point where soil is measured

Answer: (C)

The situation tests where the irrigation system actually becomes connected to and receives water from the source. The point of connection is defined by the location where water entry into the system occurs, which happens when you turn the irrigation on and the main path from the supply is opened. This is why the point at which irrigation is turned on is the best descriptor—it's the moment the system transitions from being connected to the supply to actively circulating water through the piping and sprinklers. The controller’s location is about control, not the connection boundary; the junction between main and lateral lines is an internal distribution point, not the source boundary; and soil measurement has no bearing on where the system connects to water.