Which nozzle type is described as delivering a preset flow at the rated discharge pressure?

Which nozzle type is described as delivering a preset flow at the rated discharge pressure?

• A. Smooth bore nozzle
• B. Breakaway type nozzle
• C. Fixed gallonage fog nozzle
• D. Water curtain nozzle

Answer: (C)

Fixed-gallonage fog nozzles are designed to deliver a preset flow at the rated discharge pressure. The nozzle and its internal design produce a specific gallons-per-minute when operated at the specified pressure, giving the firefighter a predictable, known flow for planning and water application. This makes them ideal when you need a consistent amount of water regardless of minor variations in handling. Other options either change the flow with pressure (smooth bore, while still predictable at a given pressure, isn’t described as a preset flow) or are used for different purposes (water curtain for protection, breakaway design for pattern change) and don’t provide a fixed, labeled GPM at the rated pressure.

Fixed-gallonage fog nozzles are designed to deliver a preset flow at the rated discharge pressure. The nozzle and its internal design produce a specific gallons-per-minute when operated at the specified pressure, giving the firefighter a predictable, known flow for planning and water application. This makes them ideal when you need a consistent amount of water regardless of minor variations in handling. Other options either change the flow with pressure (smooth bore, while still predictable at a given pressure, isn’t described as a preset flow) or are used for different purposes (water curtain for protection, breakaway design for pattern change) and don’t provide a fixed, labeled GPM at the rated pressure.