2026 1st half training final

Final Question

2000

 What pump discharge pressure (PDP) should the operator set?

A fire engine is supplying a handline with the following setup:

• Hose size: 1¾-inch
• Hose length: 200 ft
• Flow rate: 150 GPM
• Nozzle pressure: 100 psi (combination nozzle)
• Appliance loss: 0 psi
• Elevation change: 0 psi
• C=15.5

FL=C×Q2×L & 

PDP=NP+FL

What is Pump Discharge Pressure = 170 psi

FL=15.5×(1.5)2×2

FL=15.5×2.25×2

FL=69.75≈70 

PDP=100+70

PDP=170