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Questions and Answers
What is the nozzle pressure for a 1 3/8" Chief nozzle?
What is the flow rate for a 1" SB nozzle?
What is the friction loss for 1.75" Combat Ready hose?
What is the NP for the given examples?
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What is the elevation loss per floor?
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What is the flow rate for a 200' of 1.78" Combat Sniper hose with a 7/8" tip?
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What is the friction loss formula?
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What is the standpipe pressure?
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What is the PDP for the example on page 18?
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What is the flow rate for a 300' of 2.25" hose with a 1 1/8" tip?
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Study Notes
Pump Chart Introduction
- The Pump Chart is a tool used by Engineers to calculate pump pressures and flows
- It is essential to review the Pump Chart periodically to maintain proficiency in pump operations
Pump Discharge Pressure (PDP) Formula
- The PDP formula is used to calculate the total pressure required to pump water through a hose
- The formula takes into account nozzle pressure (NP), friction loss (FL), elevation (ELEV), and appliance pressure (APPL)
Friction Loss (FL) Calculation
- Friction loss is calculated using the hose diameter and the flow rate of the nozzle
- The friction loss is then multiplied by the length of the hose (in hundreds of feet)
Elevation (ELEV) Calculation
- Elevation is calculated based on the number of floors above or below the pump
- The elevation loss or gain is then added or subtracted from the total PDP
Appliance Pressure (APPL)
- Appliance pressure is the pressure required to operate a specific appliance, such as a deck gun or aerial waterway
- The appliance pressure is added to the total PDP
Nozzle Pressure (NP)
- Nozzle pressure is the pressure required to produce a specific flow rate from a nozzle
- The nozzle pressure is affected by the nozzle size and the flow rate
Crosslay and Extended Hose Operations
- Crosslay operations involve using multiple hoses to increase flow rates
- Extended hose operations involve using longer hoses to reach remote areas
- The Pump Chart can be used to calculate the PDP for both crosslay and extended hose operations
Trash Line Operations
- The trash line consist of 100’ of 1.75” hose with an Elkhart Chief nozzle that delivers 175 GPM
- The trash line is used for overhaul and vehicle fires
- The Chief Nozzle will NOT be used for structural firefighting
Denver Bundles and High-Rise Operations
- Denver Bundles consist of 150’ of 2.25” hose with a 1” tip that delivers 210 GPM
- High-Rise Operations involve using longer hoses to reach higher floors
- The Pump Chart can be used to calculate the PDP for high-rise operations
Examples of Pump Chart Calculations
- Multiple examples of pump chart calculations are provided, including single crosslay, two crosslays, 1.78” extended from 2.5” bulk bed, Blitz Line, and Trash Line operations
- Each example includes the calculation of nozzle pressure, friction loss, elevation, appliance pressure, and pump discharge pressure.
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Description
Test your knowledge of pump charts, including formulas and applications in firefighting operations. Learn about pump discharge pressure and more.