Certified Landscape Irrigation Auditor

How do rotor sprinklers work?

1. A gear arrangement moves water through 1-3 nozzles in a predetermined arc

2. A diaphragm opens to release water in a fan pattern

3. Water is sprayed in a uniform pattern through fixed nozzles

4. Pressure builds until it bursts through the nozzles

The correct answer is: A gear arrangement moves water through 1-3 nozzles in a predetermined arc

Rotor sprinklers operate using a mechanism that includes a gear arrangement, which rotates a set of nozzles over a specific arc to distribute water. This design allows rotor sprinklers to cover larger areas more effectively compared to other types of sprinklers. The gears rotate, moving the water flow from the nozzles in a controlled and predetermined pattern, which is ideal for ensuring even coverage throughout the irrigated space. This method of operation takes advantage of both the mechanical movement of the gears and the hydraulic pressure of the water, leading to efficient water application over a broader range without sacrificing uniformity. The other answer choices describe different mechanisms that are not applicable to rotor sprinklers. For instance, a diaphragm mechanism is more characteristic of spray sprinklers, which deliver water in a fan pattern. In contrast, fixed nozzles have a stationary design that does not involve movement or distribution through gear arrangements, resulting in less versatility than rotor systems. Lastly, the description involving pressure buildup until bursting does not accurately reflect how rotor systems function, as they rely on controlled rotary motion rather than sudden releases of water.