Hydraulics

Card Set Information

Author:
cop121
ID:
295947
Filename:
Hydraulics
Updated:
2015-02-21 16:40:39
Tags:
Peoria Fire Hydraulics
Folders:

Description:
All in formation taken from cheat sheet know this
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  1. FL (Friction Loss) =
    ((GPM X N)/10-10) per 100' of Hose
  2. PDP (Pump Discharge) =
    NP+FL+APP+/-ELEV

    Nozzle Pressure+Friction Loss+Appliance+or-Elevation
  3. What is "N" in the Friction Loss Formula
    N is a numeric value determined by the size of the hose line.

    • 4 = 1 1/2"
    • 3 = 1 3/4"
    • 2 = 2"
    • 1 = 2 1/2"
  4. 1 3/4 150 GPM = __ NP
    50 NP
  5. 1 3/4 200 GPM = __ NP
    75
  6. 1 3/4 225 GPM = __ NP
    100 NP
  7. 1 3/4 250 GPM = __ NP
    125 NP
  8. 2 1/2 250 GPM = __ NP
    50 NP
  9. 2 1/2 300 GPM = __ NP
    75 NP
  10. 2 1/2 350 GPM = __ NP
    100 NP
  11. 2 1/2 400 GPM = __ NP
    125 NP
  12. What is the PDP of 150 GPM on 1 3/4 150' AL
    102.5 PDP
  13. What is the PDP of 200 GPM on 1 3/4 150' AL
    150 PDP
  14. What is the PDP of 225 GPM on 1 3/4 150' AL
    186.25 PDP
  15. What is the PDP of 250 GPM on 1 3/4 150' AL
    222.5 PDP
  16. What is the PDP of 150 GPM on 1 3/4 200' AL
    120 PDP
  17. What is the PDP of 200 GPM on 1 3/4 200' AL
    175 PDP
  18. What is the PDP of 225 GPM on 1 3/4 200' AL
    215 PDP
  19. What is the PDP of 250 GPM on 1 3/4 200' AL
    255 PDP
  20. What is the PDP of 250 GPM on 2" 200' AL
    80 PDP
  21. What is the PDP of 300 GPM on 2" 200' AL
    115 PDP
  22. What is the PDP of 350 GPM on 2" 200' AL
    150 PDP
  23. What is the PDP of 400 GPM on 2" 200' AL
    185 PDP
  24. What is the formula used to calculate friction loss for a supply line?
    Q X (Q-1) / 4
  25. Q X (Q-1) / 4
    Formula used to calculate supply line friction loss
  26. How is "Q" determined in the supply line friction loss formula
    Q = GPM / 100
  27. 1 3/8 Tip = __ GPM
    500 GPM
  28. 1 5/8 Tip= __ GPM
    700 GPM
  29. 1 7/8 Tip= __ GPM
    900 GPM
  30. 2" Tip= __ GPM
    1000 GPM
  31. Nozzle Pressure on Smooth bore Tips is?
    80NP for all tips 1 3/8 or greater and 50NP for tips 1 1/4 and smaller
  32. What is the Nozzle PSI for a smoothbore Handline?
    50 PSI
  33. What is the Nozzle PSI for a Fog Nozzle?
    100 PSI
  34. What is the Nozzle PSI for a Master Stream?
    80 PSI
  35. Stang Guns PSI
    • E-One 0 PSI
    • Salsbury 15 PSI
    • Commercial Cab 15 PSI
  36. Portable Monitors PSI 
    • Elkhart 0 PSI
    • Others 15 PSI
  37. Sprinklers
    • Fire Showing 150 PSI
    • No Fire Showing 0 PSi
  38. Other Appliances
    • Wye/Siemese Flow >350 GPM 10 PSI
    • Wye/Siemese Flow <350 GPM 0 PSI
    • Standpipe Flow >350 GPM 20 PSI
    • Standpipe Flow <350 GPM 0 PSI
  39. Ladder Ops
    • Ladder 191 = 45 PSI
    • Unknown Ladder = 45 PSI

    • Add 5 PSI+/- every 10' of elevation
    • If unknown assume 65'

    • *Tip Divide total height by 2
    • Ex 80' Elevation is 40 PSI
  40. How to cool a Hot Pump
    • Open a nozzle
    • Open a discharge
    • Stick an open red line into tank-fill opening
  41. How to cool a Hot Engine
    • Fog spray under truck in front of the radiator
    • Fog spray directly on radiator
    • Open engine caulings to increase air flow
    • Open engine auxillary cooler
  42. What is cavitation
    Air Bubbles in Pump/an increase in RPM w/o an increase in PDP
  43. Cavitation Indicators
    • Sudden Loss of Pressure
    • An increase in pump speed w/out corresponding increase in pump pressure
    • Vibration
    • Sounds like gravel going through the pump
  44. Relay Pumping
    • PDP = FL + 20
    • Calculate forward pumper GPM and calculate FL for the supply line add 20 PSI
  45. Multi Supply Lines - Same Length
    Divide total flow by # of lines.  Calculate Friction Loss. Total flow / # of lines
  46. Multi Supply Lines - Different Length
    Add length of all lines, divide total length by # of lines. Calculate Friction Loss using resulting length.
  47. Max hose pressure, handline = __ GPM
    250 PSi
  48. Max hose pressure, Jacketed (Ladder) = __ GPM
    250 PSI
  49. Max hose pressure, 4" non-jacketed = __ GPM
    180 PSI
  50. Hydrant Flow (Static/Residual)
    • 0-10% drop  3 X current Flow
    • 11-15% drop 2 X current flow
    • 16-25% drop 1 X current flow
    • 26% or more is < current flow

    *Tip determine 10%, then add 1/2 that number for 15% then add the entire # for 25%

    • Ex. Static pressure is 80. 
    • 10% is 8
    • 15% is 12
    • 25% is 20
  51. Cavitation Prevention and Correction
    • Maintain a minimum of 20PSi intake pressure
    • Reduce pump speed
    • improve water supply
  52. Foam PDP is __
    100 PDP.  foam is always 100 PDP!

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