SABT Test Five Review

Question 0

What is Congress enacts legislation in response to a spike in the number of fires at place of worship throughout the US. ATF shared jurisdiction with the FBI which is charged with the inv of the violation of civil rights as they pertain to these acts

Answer 0

Church Arson Act 1996

Question 1

Name the 7 steps in the Systematic Approach of an Investigation

Answer 1

1 Recognize the need -arrival at the scene
2 Define the problem-security at CS, safety
3 Collect Data-document the SC, interviewing, taking pictures
4 Analyze Data
5 Form a hypothesis
6 Test the hypothesis
7 Select a final hypothesis

Question 2

This adds Fire to USC 844i statute as it pertains to the destruction of business with interstate nexus. ATF role in arson enforcement expands at a critical time in the history of ATF when RIF was going on. At this time ATF assume role as lead Fed agency in the enforcement of violations under

Answer 2

Anti Arson Act of 1982

Question 3

When investigating a arson an agent should inv from

Answer 3

outside to inside and least to most damage.

Question 4

Prior to 1882 ATF only worked Arson cases that involved the criminal use of an

Answer 4

Incendiary Device

Question 5

ATF investigates and prosecution of arson fires by using the

Answer 5

Explosive Control Act of 1970

Question 6

Wha is a useful guid an ATF can use to inv Arson investigations

Answer 6

NFPA 921 guide

Question 7

When collecting evidence at a fire scene, agents should fill the can no more than

Answer 7

leaving headspace, half full no more 2/3rd full, airtight, have ur
initials, date, exhibit #, inv # evidence tape
-do not use USPS to ship hazardous material, on Fedex or UPS and must have a tracking number.

Question 8

Name the 3 types of Contamination

Answer 8

1 Cross Scene-Accelerant residues carried from one scene to another by personal equipment (same scene change gloves)
2 Cross Case- improper storage or packaging
3 Contamination from another source-gas station step in gas and take it to the CS

Question 9

Evidence that can be found at a fire scene =

Answer 9

1 Area of Orgin
2 Cause of Fire
3 indication of accelerant use (burn patterns, Electronic sniffers, k-9)

Question 10

A rapid oxidation process with the evolution of light and heat in varying intensities.

Answer 10

Fire

Question 11

Name the 3 basic elements of Fire Triangle

Answer 11

Heat
Fuel
Oxygen

Question 12

What is the Expanded upon the fire triangle to include the uninhibited (Chemical) chain reaction to a four sided solid geometric form. plus the
Heat, oxygen, and fuel

Answer 12

Fire Tetrahedron

Question 13

What is the Three methods of heat Transfer

Answer 13

1 Conduction- heat transfer to another body or within a body by direct contact.
2 Convection-heat transfer by circulation within a medium, such as a gas or liquid
3 Radiation-Heat transfer by way of electromagnetic waves.

Question 14

Name the 4 types of Combustion

Answer 14

1 Spontaneous
2 Smoldering
3 Pre-mixed
4 Diffusion

Question 15

Any flame in which the fuel and oxidizer are initially mixed and ignited

Answer 15

Pre-mixed Flames

Question 16

A flame in which fuel and air mix or diffuse together at the region of compustion

Answer 16

Diffusion Flames

Question 17

What are the two types of flames

Answer 17

1 Pre-mixed Flames

2 Diffusion Flames

Question 18

What is the initiation of combustion of a material by an internal chemical or biological that has produced sufficient heat to ignite the material

Answer 18

Spontaneous Combustion

Question 19

What are the 3 types of Fuel

Answer 19

1 Solid- needs to be heated in order to decompose and produce ignitable vapors
2 Liquid- Needs to produce vapors to be ignited
3 Gaseous-Needs to be mixed with the proper amount of oxygen to be ignited Common types are methane, propane, butane, and acetylene.

Question 20

The lowest temperature at which a liquid produces vapors at a sufficient rate to support a momentary flame

Answer 20

Flashpoint

Question 21

Flashpoint < 100 degrees F

Answer 21

Flammable

Question 22

Flashpoint > 100 degrees F

Answer 22

Combustible

Question 23

Density of vapor to air =

Answer 23

Vapor Density

Question 24

THe upper or lower concentration limit at specific temperature and pressure of a flammable gas or vapor of an ignitable liquid or vapor expressed as a percentage of fuel by volume that can be ignited

Answer 24

Flammable Limit

Question 25

What is the Four phases of Fire

Answer 25

1 Ignition
2 Growth
3 Fully Developed
4 Decay

Question 26

heat, fuel and oxygen have been brought together as combustion begins

Answer 26

Ignition Phase

Question 27

THe fire is developing in intensity and beginning to spread

• unburned products of combustion rise in fire plume
• hot gas layer begins to form at ceiling
• Radiant heat hot gas layer is hating all combustibles
• Fuel (quantity, arrangement, Characteristics)
• Ventilation (Amount of oxygen that is available)

Answer 27

Growth Phase

Question 28

Free burning phase the fire continues to burn freely. Combustion a balance must be maintained (self sustaining chemical chain reaction) among heat, fuel and oxygen (Fire tetrahedron)

• Combustible (fuel) are consumed
• formation of fire patterns
• Degradation of structural components (collapse)
• Post Flashover fire damage

Answer 28

Fully developed

Question 29

The fire begins to decline in intensity due to lack of fuel, oxygen, heat and the interruption of the self sustained chemical reactions (fire tetrahedron)

• Fuel is consumed/ removed
• Ventilation limited (oxygen)
• Heat is diminished
• Chemical reactions (combustion) chain is broken
• Self extinguishment
• Fire suppression efforts (water, Chemical)

Answer 29

Decay

Question 30

The (transition) state in the fire development when all combustibles in the room reach ignition temperatures simultaneously.
-When a fire in a room becomes a room on fire.
between growth and fully developed.

Answer 30

Flashover

Question 31

The transfer of head by methods of convection, conduction and radiation and movement of super heated gases and smoke that are simply unburned products of combustion.

Answer 31

Fire spread

Question 32

Fire moving upwards and outwards due to ____ of convective gases and also referred as______–

Answer 32

Buoyancy

Fire Plume

Question 33

Center configuration
Corner configuration
Wall Configuration

Answer 33

Where in the room is the fire located

Question 34

• Buoyancy Principle
• Methods of heat transfer
• super heat gases
• formation of gas smoke layer
• Path of least resistance
• Fire plume
• ceiling jet
• smoke layer
• fire configuration

Answer 34

Fire spread terms

Question 35

The consideration of fuel loads will answer the question of what is burning =

Answer 35

Fuel Load

Question 36

What is a most common explosion related to fires also referred to as a gas/ vapor explosion, a fuel-air explosion, or a combustion explosion.
-most common= gas, vapor and dusts
-natural gas and Liquid Petroleum GAS
(structure fires) = non seated explosion

Answer 36

Chemical Explosions

Question 37

Explosion in which a high pressure gas creates internal pressure within a confining container and produce a purely physical reaction

• BLEVE (boiling liquid expanding vapor explosion) one of most common found at a fire i.e water heater, steam boiler
• 400 degrees steel will decrease
• 930 steel is reduced by one half

Answer 37

Mechanical explosions

Question 38

in a fire where the origin is clearly defined it is occasionally possible to make a credible determination regarding the cause of the fire, absent physical evidence through credible elimination of all other potential ignition sources
.ie. light a match and burn a church and take it with them.

Answer 38

Negative Corpus