Which statement concerning automatic constant pressure nozzles is correct?

Which statement concerning automatic constant pressure nozzles is correct?

• A. The nozzle operator can adjust the flow rate by opening and closing the shut-off valve.
• B. Automatic constant pressure nozzles maintain a fixed flow regardless of valve position.
• C. Flow rate is controlled only by the pump discharge rate.
• D. The nozzle is preset and cannot be adjusted.

Answer: (B)

Automatic constant pressure nozzles are designed to deliver a steady, predictable flow by automatically regulating the water leaving the nozzle to maintain a set operating condition. In practice, as you adjust the shut-off valve, the nozzle’s internal mechanism compensates so the flow rate through the nozzle stays essentially the same. That’s why the statement describing a fixed flow regardless of valve position best fits how these nozzles are used in the field: the nozzle self-regulates to keep the discharge steady, making it easier to apply water consistently. The other ideas don’t align with how these nozzles function: the flow isn’t simply controlled by the valve, and the system isn’t described as being governed solely by pump discharge, and the nozzle does have adjustment features to set its operating characteristics.

Automatic constant pressure nozzles are designed to deliver a steady, predictable flow by automatically regulating the water leaving the nozzle to maintain a set operating condition. In practice, as you adjust the shut-off valve, the nozzle’s internal mechanism compensates so the flow rate through the nozzle stays essentially the same. That’s why the statement describing a fixed flow regardless of valve position best fits how these nozzles are used in the field: the nozzle self-regulates to keep the discharge steady, making it easier to apply water consistently. The other ideas don’t align with how these nozzles function: the flow isn’t simply controlled by the valve, and the system isn’t described as being governed solely by pump discharge, and the nozzle does have adjustment features to set its operating characteristics.