Which term describes a nozzle with a fixed discharge rate?

Which term describes a nozzle with a fixed discharge rate?

• A. Fog nozzle
• B. Fixed gallonage
• C. Automatic nozzle
• D. Variable gallonage

Answer: (B)

Discharging a fixed number of gallons per minute is the defining idea here. A fixed gallonage nozzle is built so the flow remains the same regardless of normal pressure fluctuations, delivering a predetermined gpm. This predictability helps pump operators and firefighters calculate friction losses and plan reach and pattern for the line. Fog nozzles are typically used for adjustable patterns and their flow can vary with settings and pressure. An automatic nozzle aims to hold a steady discharge as inlet pressure changes, but it’s not described as delivering a truly fixed rate under all conditions. A variable gallonage nozzle lets you change the flow rate manually. So, the term that best describes a nozzle with a fixed discharge rate is fixed gallonage.

Discharging a fixed number of gallons per minute is the defining idea here. A fixed gallonage nozzle is built so the flow remains the same regardless of normal pressure fluctuations, delivering a predetermined gpm. This predictability helps pump operators and firefighters calculate friction losses and plan reach and pattern for the line.

Fog nozzles are typically used for adjustable patterns and their flow can vary with settings and pressure. An automatic nozzle aims to hold a steady discharge as inlet pressure changes, but it’s not described as delivering a truly fixed rate under all conditions. A variable gallonage nozzle lets you change the flow rate manually. So, the term that best describes a nozzle with a fixed discharge rate is fixed gallonage.