Certified Landscape Irrigation Auditor Practice Exam

Electric control valves are designed to facilitate the management of water flow in irrigation systems. One of the primary adjustments that can be made to these valves is pressure adjustments. This is crucial because improper pressure can affect the performance of not only the valves but also the entire irrigation system.

By adjusting the pressure, you ensure that the system operates within its optimal range, which can lead to more efficient water use, improved distribution, and better plant health. Valves may come with built-in features or accessories that allow for pressure regulation, ensuring that the water delivered matches the needs of the landscape being irrigated.

The other options listed involve parameters that are typically not adjusted in the context of standard electric control valves. Rotation speed is not relevant here, as electric control valves function based on actuated on/off positions rather than variable speed. Voltage settings pertain to power supply rather than to direct adjustments of the valve's performance capabilities. Impulse frequency may relate to specific types of control systems but is not a general adjustment available for electric control valves in irrigation systems.