* Hydraulics (pt 1) Flashcards

1
Q

Main hydraulic equation

A

EP = NP + FL + AP +/- EL

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2
Q

Elevation gain or loss =

A

½ psi per foot or 5 psi per floor

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3
Q

Fog Nozzle GPM’s

Master stream fog

A

500-2000 GPM @100psi

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4
Q

Fog Nozzle GPM’s

Ground monitor fog

A

50-1250 GPM @100psi

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5
Q

Fog Nozzle GPM’s

Blitz fog

A

100- 500 GPM @100psi

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6
Q

Appliance FL

Gated Wye

A

10 psi (> 350 GPM)

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7
Q

Appliance FL

Monitor

A

20 psi (> 350 GPM)

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8
Q

Appliance FL

Blitz

A

10 psi (> 350 GPM)

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9
Q

Appliance FL

Standpipe

A

25 psi (> 350 GPM)

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10
Q

Appliance FL

Dry Ladder

A

80 psi (> 350 GPM)

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11
Q

Appliance FL

L259

A

80 psi (> 350 GPM)

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12
Q

Appliance FL

Deck Gun

A

20 psi

>350gpm

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13
Q

Appliance FL

Sprinklers / stand pipe

A

150 psi

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14
Q

Appliance FL

Forward Pumper

A
  1. 20 psi
  2. for any GPM
  3. Including wet ladders if going through pump intake
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15
Q

Nozzle Pressures

Smooth Bore Master

A

80 psi

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16
Q

Friction Loss
1 ¾ “ hose
FL/ 100’

A

165 GPM’s = 25 psi

185 GPM’s = 30 psi

17
Q

2 1/2 “ hose

FL/ 100’

A

5psi / 50’ for both preconnect and high rise packs (for both 1 1/8 and 1 3/16)

18
Q

Blitz Solid Stream tip GPM’s: (50 psi NP )

A

1” = 200

1 ¼ ” = 300

1 ½ “ = 450

19
Q

Ladder Solid Stream GPM’s (80 psi NP )

A

2 ¼ “ = 1345

2 ½ “ = 1660

2 ¾ “ = 2010

20
Q

Maximum Hose Operating Pressure

A
  1. Double Jacket attack lines = 200 psi
  2. Double Jacket 5” Supply (dry ladder) = 250 psi
  3. Single Jacket and Single Jacket Supply = 180 psi
21
Q

Solid Stream Nozzle GPM

( 50 psi NP ) Hand line

A

15/16” = 185

1“ = 200

1 1/8 “ = 265

1 3/16” = 296

1 ¼” = 300

22
Q

Solid Stream Nozzle GPM

( 80 psi NP ) Master Stream

A

1 3/8 “ = 500

1 ½ “ = 600

1 5/8 = 700

1 ¾” = 800

1 7/8” = 900

2” = 1000

23
Q

Hydrant Performance / Pressure Drop

A

( Static – Residual ) X 100
————————————
Static

24
Q

% Additional Water Available

A

0-10% — 3x amt. being delivered

11-15% — 2x amt. being delivered

16-25% — 1x amt. being delivered

> 25% — Less than what is being delivered

25
Class A Foam and Application Rates
1. .1 - .2 % = Best for overhaul ( wet foam ) 2. .3 - .5 % = Initial fire attack 3. 1 % = Exposure protection ( dry foam ) 4. CAFS : Must have a 50-psi differential between intake pressure and discharge pressure [*Example: Intake of 50 psi from hydrant, discharge pressure needs to be 100 psi]
26
Coefficients for 1 3/4"; 2 1/2"; 5"
1 3/4" -- 9 2 1/2" -- 1 5" -- 0.05
27
Formula for friction loss
FL = (C x Q squared) (L)
27
What is application rate for new B500 foam?
``` 3% for class B 1/4, 1/2, 1% for class A ```
29
Formula for Q
GPM/100
30
Formula for L
Hose Length / 100