* Hydraulics (pt 1)

Question 1

Main hydraulic equation

Answer 1

EP = NP + FL + AP +/- EL

Question 2

Elevation gain or loss =

Answer 2

½ psi per foot or 5 psi per floor

Question 3

Fog Nozzle GPM’s

Master stream fog

Answer 3

500-2000 GPM @100psi

Question 4

Fog Nozzle GPM’s

Ground monitor fog

Answer 4

50-1250 GPM @100psi

Question 5

Fog Nozzle GPM’s

Blitz fog

Answer 5

100- 500 GPM @100psi

Question 6

Appliance FL

Gated Wye

Answer 6

10 psi (> 350 GPM)

Question 7

Appliance FL

Monitor

Answer 7

20 psi (> 350 GPM)

Question 8

Appliance FL

Blitz

Answer 8

10 psi (> 350 GPM)

Question 9

Appliance FL

Standpipe

Answer 9

25 psi (> 350 GPM)

Question 10

Appliance FL

Dry Ladder

Answer 10

80 psi (> 350 GPM)

Question 11

Appliance FL

L259

Answer 11

80 psi (> 350 GPM)

Question 12

Appliance FL

Deck Gun

Answer 12

20 psi

>350gpm

Question 13

Appliance FL

Sprinklers / stand pipe

Answer 13

150 psi

Question 14

Appliance FL

Forward Pumper

Answer 14

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

Question 15

Nozzle Pressures

Smooth Bore Master

Answer 15

80 psi

Question 16

Friction Loss
1 ¾ “ hose
FL/ 100’

Answer 16

165 GPM’s = 25 psi

185 GPM’s = 30 psi

Question 17

2 1/2 “ hose

FL/ 100’

Answer 17

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

Question 18

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

Answer 18

1” = 200

1 ¼ ” = 300

1 ½ “ = 450

Question 19

Ladder Solid Stream GPM’s (80 psi NP )

Answer 19

2 ¼ “ = 1345

2 ½ “ = 1660

2 ¾ “ = 2010

Question 20

Maximum Hose Operating Pressure

Answer 20

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

Question 21

Solid Stream Nozzle GPM

( 50 psi NP ) Hand line

Answer 21

15/16” = 185

1“ = 200

1 1/8 “ = 265

1 3/16” = 296

1 ¼” = 300

Question 22

Solid Stream Nozzle GPM

( 80 psi NP ) Master Stream

Answer 22

1 3/8 “ = 500

1 ½ “ = 600

1 5/8 = 700

1 ¾” = 800

1 7/8” = 900

2” = 1000

Question 23

Hydrant Performance / Pressure Drop

Answer 23

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

Question 24

% Additional Water Available

Answer 24

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

Question 25

Class A Foam and Application Rates

Answer 25

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]

Question 26

Coefficients for 1 3/4”; 2 1/2”; 5”

Answer 26

1 3/4” – 9

2 1/2” – 1

5” – 0.05

Question 27

Formula for friction loss

Answer 27

FL = (C x Q squared) (L)

Question 27

What is application rate for new B500 foam?

Answer 27

3% for class B
1/4, 1/2, 1% for class A

Question 29

Formula for Q

Answer 29

GPM/100

Question 30

Formula for L

Answer 30

Hose Length / 100