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241

Heat transfer in a stationary medium: solid, liquid and gas

Conduction
Most important physical properties for conduction: thermal conductivity, density, specific heat

* there is no heat conduction in a perfect vacuum

242

____ are of little use stopping radiant energy

Water Curtains
* you must apply water directly on the exposure

243

"Heat Waves"
can penetrate windows
Moves equally in all directions from fire
It is an ______ energy
It can move through water

Radiation

Electromagnetic

244

On a high rise the greatest danger floors are the :

Fire floor
Floor above
Top floor

245

Method by which air currents transfer heat _______

Convection

246

In the _____ phase the fire produces significant heat and smoke.

The fire spreads ____ until it meet resistance and then spreads _____

As things in the room absorb heat they reach their ______

Then the room will _____

The room temp can be over ______ degrees F

Free burning

Vertically , Horizontally

Ignition temperature

Flashover

1000 degrees F

247

Not all fires go through:

Distinct phases Pg 116

248

Growth of a fire depends on :

Type of fuel
physical property of fuel
Surface to mass ratio
arrangement of fuel
Adequate ventilation

249

4 stages of fire

Incipient - (ignition)

Free burning

Flashover

Smoldering / Decay

250

Fire progress depends on

Fuel load

Combustibility of fuel

Intensity of heat produced

251

Aspects to consider when determining the stage of a fire growth:

Pg116
Shape and color of the flames
Density and color of the smoke
Pressure behind the smoke movement

252

In a smoldering fire. A lot of gas is produced because of :

low oxygen levels

253

Smoke can ignite because of the buildup of ____

_____ is the most abundant gas produced at a fire

It is the cause of death in over ___% of the fatalities

When synthetic materials that contain nitrogen burn, they release _______

Carbon monoxide Pg114

Carbon Monoxide

50%

Hydrogen Cyanide

254

Class A fires produces ____, ____, and _____

Class B fire produces _____

Plastic also produce ______ and _____

____ and ____ are the greatest cause of death fires

Carbon dioxide , Monoxide and water

Heavy black sooty smoke because of the carbon that remains unburned

Hydrogen cyanide and hydrogen chloride

Gases and toxic

255

Its important to know the _____ of fuels so that you can clean the right extinguishing agent

Classification

256

Process where an extinguishing agent converts the burning substance to a non combustible soap:

This process in a _____ reaction

Saponification

Endothermic
* it absorbs thermal energy from its surroundings

257

Five classes of fire:

A - ordinary combustibles
B- Flammable petroleum products liquid, solid or gas
C- Electrically energized equipment
D- Combustible Metals
K- Combustible cooking fuels

258

When the _____ agent and the _____ agent combine and transfer their ______, they emit heat and light as an energy source. This source presents itself as ______.

Oxidizing and reducing

Electrons

Flame

259

Developed in the 1950's by ______

Wanted to find out why _____ was such a effective extinguishing agent

The triangle was joined by a fourth component called ______

In the fire process, known as ______

Walter Haessler

ammonium phosphate

Uninhibited chain reaction

Flamin combustion

260

Heat and light released in an energy form is called :

1 part of the triangle is removed?

Water ______

Fire or flame

Fire goes out

Absorbs heat

261

For fire to occur the fuel must be:

Fuel is most likely comprised of carbon and hydrogen atoms that can be _____

Breathing air in the atmosphere is __-% the rest is most _____ which is _____

Combustible or flammable material

Oxidized

21%

Nitrogen , Inert

262

Fuel for fire can come in 3 forms

solid
liquid
gas

263

Fire is a chemical process in which heat, fuel, and oxygen come together in an _____

Fire produces an _____ reaction

Uninhibited chain reaction

Exothermic
releasing heat, light , smoke, and products of incomplete combustion

264

Knowing what a fire is, how it grows and spreads and what it takes to stop its progress.

Is critical for any IC

Thats all the info

265

IC's should know their enemy whether it be a ____, ____ or _____

Fire
Hazardous chemical release
Building collapse

266

Because of their physical and chemical properties fires usually:

Behave in the same manner. So certain behaviors can be expected IE: Fire spread

267

The meaning of words in communications is based on :

Prior understanding and knowledge

268

The NFA came up with a 6 step communication model:

1 - sender formulates an idea he wants to convey
2- the sender sends the message
3- the message is transferred through a medium Ex: orally, visually
4 - the receiver receives the message
5- the receiver interprets the message
6 receiver confirms receipt by providing feedback

269

Through the size up process, the incident priorities are applied to :

a specific situation
pg76

270

Size up triangle

Resources

Conditions

Enviroment

Enviroment - includes construction features of the fire building or the terrain where the fire occurs ex. weather, fire load, height, area, building occupancy

Resources - The number of personnel, type of equipment, and need for specialized equipment

Conditions / situation
what is on fire?
Where is it going?
What harm has it/ could it cause?