Most landlines with smooth-bore nozzles are designed to operate at what nozzle pressure?

Most landlines with smooth-bore nozzles are designed to operate at what nozzle pressure?

• A. 50
• B. 100
• C. 150
• D. 200

Answer: (A)

Smooth-bore landlines are designed to deliver a solid, stable stream when the nozzle is operated at a relatively low pressure. This level at the nozzle—the standard setting for smooth-bore lines—provides reliable pattern and reach while keeping nozzle reaction and hose friction losses manageable for interior work. If you increase the nozzle pressure, recoil rises and the pump and hose must work harder, which can make the stream harder to control and degrade stability. Higher pressures are more typical for fog or adjustable nozzles, not smooth-bore lines, so the lower pressure is the best fit for these lines.

Smooth-bore landlines are designed to deliver a solid, stable stream when the nozzle is operated at a relatively low pressure. This level at the nozzle—the standard setting for smooth-bore lines—provides reliable pattern and reach while keeping nozzle reaction and hose friction losses manageable for interior work. If you increase the nozzle pressure, recoil rises and the pump and hose must work harder, which can make the stream harder to control and degrade stability. Higher pressures are more typical for fog or adjustable nozzles, not smooth-bore lines, so the lower pressure is the best fit for these lines.