Principles Of Fire Behavior And Combustion Ch.13

Front 1

The first automatic sprinkler system was built in:

Back 1

1875

Front 2

When an overwhelming mass of water is applied, such as by flooding a compartment, the water:

Back 2

Cools the fuel and isolates the fuel surface from the air above

Front 3

A fine water mist can extinguish a fire by any 4 mechanisms

Back 3

1. The evaporating mist droplets remove heat

2. The mist droplets evaporate in the hot environment generating steam acting as a diluent

3. The mist droplets block radiative heat transfer from the flame to the combustible

4. If delivered as a high momentum stream, the mist droplets cool the fuel surface

Front 4

Within the environment in which a fire might be of concern, the fire tetrahedron has been interrupted such that a fire cannot exist.

Back 4

Fire inerting

Front 5

A water-soluble linear polymer that, when added to water in amounts of approximately .02% by volume, can increase water delivery by 40% over pure water

Back 5

Poly ethylene oxide

Front 6

Some formulations of ______ referred to as alcohol - resistant foaming agent, can suppress fires involving liquids that are miscible with water. Burning combustible liquids that require alcohol - resistant foaming agent for extinguishment include alcohols, glycol, acetone, methyl ethyl ketone, isopropyl ether, ethyl acetate, amines, enamel thinners and lacquer thinner

Back 6

AFFF

Front 7

Readily shed the fuel and form the surface layer typical of firefighting foams. These products are compatible with dry chemical fire suppressants that break down regular protein foams.

Back 7

Fluoro protein foams

Front 8

Medium expansion foam have ratios of:

Back 8

20 to 200

Front 9

High expansion foams have ratios of:

Back 9

More than 200

Front 10

Over the past century and a half, and number of fire suppressant that are not based on water have emerged to meet the new needs, these can be organized into three categories:

Back 10

1. Inert gases

2. Halogenated organic compounds

3. Powdered inorganic salts - also referred to as dry chemicals.

Front 11

Inert gasses are organized into four groups:

Back 11

1. Noble gases - helium, neon, argon, krypton, and xenon

2. Nitrogen

3. Carbon dioxide- most commonly used inert gas

4. Fully fluorinated Organic molecules

Front 12

Liquid CO2 can be kept in a pressure vessel at any temperature between:

Back 12

-57°C and +31°C ( critical temperature )

Front 13

Typically creates an array of narrow passage ways of high thermal conductivity through which the fuel - air mixture must flow

Back 13

Flame arrestor