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Pumper Chapter 7
Question | Answer |
---|---|
What factors contribute to total pressure loss? | Condition of of the hose and couplings as well as any kinks in the hoseline. Primary consideration is the volume of water flowing per minute |
How is pump discharge pressure calculated? | PDP-Pump Discharge Pressure in pounds per square inch (psi) NP-Nozzle pressure in pounds per square inch (psi) TPL-Total Pressure Loss in pounds per square inch(psi) (TPL accounts for pressure loss due to friction, elevation, and appliances) |
generic term to any nozzle wye, Siemese, deluge monitor, or other piece of hardware in conjunction with fire hose for the purpose of delivering water | Appliance |
actual pressure of the water as it leaves the pump and enters the hoseline | Pump Discharge Pressure |
Pump Discharge Pressure | PDP |
Fog Nozzle | 100 psi (700 kPa) |
Solid Stream Nozzle (handline) | 50 psi (350 kPa) |
measured in pounds per square inch or kilopascals | Pump Discharge Pressure |
total amount of pressure being discharged by a pump | Pump Discharge Pressure |
Low Pressure Fog Nozzle | 50 0r 75 psi (350 or 525 kPa) |
In mathematical terms, it is the pump intake pressure plus the net pump discharge pressure | Pump Discharge Pressure |