Term
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Definition
| the water or other agent that leaves the nozzle |
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Term
| Four elements of a fire stream |
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Definition
| Pump, Water, Hose, Nozzle |
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Term
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Definition
| Capable of creating straight stream and spray (fog) patterns, which can be adjusted by the operator |
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Term
| Important factors for Nozzle selection |
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Definition
| Nozzle pressure, nozzle flow, nozzle reach, stream shape, nozzle reaction |
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Term
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Definition
| pressure required for effective nozzle operation; ie pressure at the tip of the nozzle |
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Term
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Definition
| Amount or volume of water that a nozzle will provide at a given pressure |
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Term
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Definition
Distance water will travel after leaving the nozzle
Affected by: shape, pressure, wind direction, gravity, and friction in air |
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Term
| Optimal Horizontal Reach/Vertical |
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Definition
Optimal at 32 degrees (horizontal)
65-70 degrees (vertical) |
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Term
| Stream Shape/Stream Pattern |
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Definition
| the arrangement/configuration of the droplets of water as they leave the nozzle |
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Term
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Definition
| Kickback at the nozzle due to water flow at the nozzle |
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Term
| Variable/Adjustable Gallonage Nozzle |
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Definition
| Allows nozzle operator to select from 2 or 3 flow/pattern options |
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Term
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Definition
| Can be used as a fan to move large volumes of air, ie horiz ventilation |
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Term
| Cellar/Bresnan Distributor Nozzles |
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Definition
| used to fight fires localized to cellars and basements |
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Term
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Definition
| Originally for aircraft fires, capable of piercing walls to deliver water |
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Term
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Definition
| Capable of delivering over 350 GPM, must be mounted/secured |
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Term
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Definition
Direct
Indirect
Combination |
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Term
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Definition
| Attacking fire by aiming the flow of water directly at the seat of the fire |
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Term
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Definition
| Used for interior fires; apply water in a fog stream into a closed room, allowing the steam to extinguish the fire |
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Term
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Definition
| Blend of direct and indirect |
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Term
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Definition
| Study of fluids at rest and in motion |
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Term
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Definition
Atmospheric
Absolute
Gauge
Vacuum (negative)
Head
Velocity |
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Term
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Definition
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Term
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Definition
| Apparatus capable of drafting have at least one gauge to measure this |
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Term
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Definition
Pressure at the bottom of a column of water, gained or lost when being pumped above or below pump
5psi a floor up or down |
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Term
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Definition
| Pressure in hose being converted to velocity, becomes Nozzle pressure when it leaves the nozzle |
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Term
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Definition
| an aggregate of gas-filled bubbles formed from aqueous solutions of specialy formulated concentrated liquid foaming agents |
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Term
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Definition
amount of foam/foam solution needed to extinguish the fire
allows ff's to pre-plan for probable needs for foam prior to attack |
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Term
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Definition
| ability of foam to stand up to the heat of a fire |
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Term
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Definition
| how fast the foam spreads across a surface of fuel |
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Term
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Definition
| Aqueous Film Forming Foam- made of synthetic materials |
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Term
| What are the two most important factors governing water application for fire extinguishment? |
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Definition
| Rate of flow and proper distribution |
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Term
| What are the four functions of a nozzle? |
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Definition
| Control flow, provide reach, create shape, and determine water direction |
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Term
| What are the two nozzle components? |
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Definition
| The shut off and the stream shaping device |
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Term
| What are the three types of nozzles? |
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Definition
| Smooth-bore, combination, and specialty nozzles |
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Term
| Nozzle style: Single gallonage, variable flow |
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Definition
| As the pattern is changed, so does the flow rate |
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Term
| Nozzle style: Single gallonage, constant flow |
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Definition
| Constant gallonage over different flow patterns |
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Term
| Nozzle style: Adjustable gallonage, constant flow |
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Definition
| Once gallonage is selected by the operator, the nozzle will flow that gallonage in all stream positions |
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Term
| Nozzle style: Constant pressure, variable flow (automatic nozzle) |
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Definition
| Constant pressure, however flow varies depending on operating pressure |
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Term
| Nozzle style: Smooth-bore |
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Definition
| First stream shaping device used in firefighting. Also called solid stream or straight-bore, it is the simplest of all nozzles. |
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Term
| 1 3/4" line smooth bore nozzle specs |
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Definition
| 7/8" tip, 160GPM, orange tape |
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Term
| 2 1/2" line, smooth bore nozzle specs |
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Definition
| 1 1/8" tip, 266 GPM, blue |
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Term
| Nozzle used during standpipe ops |
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Definition
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Term
| Friction Loss for 1 3/4", and 2 1/2" lines (50' lengths) |
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Definition
1 3/4" is 15 psi
2 1/2" is 5 psi |
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Term
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Definition
1. Knowledge of fire behavior
2. Nozzle shut down after 30sec to avoid over cooling
3. 30 degree fog |
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