15 Origin And Cause Determination

Question 1

The area of origin is not readily apparent company officer should use a methodology that typically involves working from

Answer 1

Least damage to most damage area

Question 2

The area of greatest damage should not be assumed to be

Answer 2

The area of origin

Question 3

For basic steps in determining area of origin

Answer 3

Examine exterior of structure or vehicles and surrounding area.
Examine interior of structure or vehicle.
Interview witnesses and responders.
Analyze the information

Question 4

During cause determination when is the safety survey conducted

Answer 4

During the exterior search of the building

Question 5

Part of fire pattern analysis is determining the order in which

Answer 5

The patterns were created

Question 6

The goal of analyzing fire patterns is to determine

Answer 6

Fire spread from the area of origin

Question 7

NFPA 921 describe fire patterns as

Answer 7

Visible or measurable physical effects that remain after a fire

Question 8

Fire patterns are formed as a result of directly in contact or exposure to heat and Are found where

Answer 8

On interior surfaces

Question 9

Hey V shaped pattern should have been made during what fire phase

Answer 9

Incipient phase

Question 10

Rob services are often more heavily damaged and what type of surface of the same material

Answer 10

Smooth surfaces because rough surfaces of greater surface area

Question 11

Plume generated fire pattern

Answer 11

Fire patterns created as a result of plume of hot gases rising above initial fire

Question 12

Radiant heat forms in the hot gas later before flashover.

Answer 12

Hot gas layer fire pattern

Question 13

What type of fire pattern is found after the when fires are extinguished before flashover

Answer 13

Hot gas layer pattern

Question 14

Ventilation generated fire pattern

Answer 14

Created by ventilation introduced to a fire, varies widely

Question 15

Occurs after flashover or long burn time. Almost all vertical and horizontal surfaces are damaged

Answer 15

Full-grown involvement fire pattern

Question 16

A fire pattern found on noncombustible surfaces were so deposits have been burned away leaving a clean demarcation

Answer 16

Clean Burns, fire pattern

Question 17

Sharp edges of structural component burned away on the side that faces heat source.

Answer 17

Pointers or arrows, fire pattern

Question 18

Type of fire pattern that also refers to a series of components that indicate longer duration on one end and shorter on the other

Answer 18

Pointers or arrows

Question 19

It regular patterns on floors indicate

Answer 19

No common pattern, fire follow the path of available feels

Question 20

Saddle Burns, fire pattern

Answer 20

Fire that burns down through the floor over the joist

Question 21

Undamaged surface within an otherwise fire damaged area. Possibly shielded from other objects

Answer 21

Protected areas, fire pattern

Question 22

What retells the history of the fire

Answer 22

Measurable visible damage, patterns created from heat sources

Question 23

A fire scene shows a V shaped pattern above a candle from the drapes and frame catching fire appearing charred. The window on the opposite side is heavily charred, more so than the v side. This is likely due to

Answer 23

Ventilation pattern. Not point of origin.

Question 24

To ensure chain of custody, each piece of evidence should have the following information recorded

Answer 24

It’s location
Name of discovering person
Where it was found
Time and date of acquisition

Question 25

When investigating a vehicle fire, investigators should use a systematic exam using the following to determine origin

Answer 25

Photos Documentation Fire Pattern analysis Comparative analysis of damage to other areas of vehicle.

Question 26

Vehicle fires can be divided into three areas of examination

Answer 26

Scene around Exterior of vehicle Interior

Question 27

When examining interior of a vehicle fire, the areas should be further divided into what compartments

Answer 27

Engine Cargo Passenger compartments

Question 28

Investigators should follow a certain methodology when investigating vehicle fires, which should include the following.

Answer 28

Vehicle history and documentation Scene exam Document scene Fire pattern analysis Examine exterior Examine engine cargo and passenger compartment In hybrids, exam high voltage battery compartments

Question 29

The area where the ignition source material first ignited actually came together

Answer 29

Area of origin

Question 30

Energy source in a vehicle capable of being hot enough to ignite fuel

Answer 30

Competent ignition source

Question 31

In vehicle origin determination a sketch should be made of the vehicle in relation to

Answer 31

Other objects

Question 32

Documenting rest angle during a vehicle fire means documenting

Answer 32

The angle the car is, pitched to the left or right or down a ditch etc.

Question 33

Radial fire patterns show movement on

Answer 33

Vehicle body panels, hood doors. Fenders. May appear to ripple

Question 34

Photos should be taken of what on the car during a vehicle fire

Answer 34

All panels, wheels lids, bumpers, undercarriage and roof

Question 35

Damage to the lower portion of the windshield indicates

Answer 35

Fire spread from engine compartment to passenger

Question 36

Fire damage to the top of the windshield indicates

Answer 36

Fire spread from passenger compartment to engine compartment

Question 37

Documentation of cargo compartment should include

Answer 37

``` Damage in interior Personal effects and their condition Damage to spare tire Damage to wiring Fire pattern ```

Question 38

Photographs of each vehicle compartments should be taken how

Answer 38

From multiple angles of each compartment

Question 39

If unaffected by topography and weather, wildfires tender to burn in what direction from origin

Answer 39

Outward in all directions

Question 40

Aspect

Answer 40

Direction slope faces in wildland fires NORTH S E W

Question 41

In wildland fires there may be less damage near the point of origin, true false

Answer 41

True

Question 42

If a person being interviewed is suspected of being involved in the crime, who should be present

Answer 42

LE or formal investigator

Question 43

A fire investigator should be called if the cause is determined or suspected of being

Answer 43

Malicious, negligent, or with death resulting

Question 44

A competent ignition source must have three qualities

Answer 44

Sufficient temp to ignite Sufficient heat transfer to ignite Sufficient time of transfer

Question 45

Material first ignited

Answer 45

First Fuel that combusts from the ignition source

Question 46

The first material ignited should have three characteristics that parallel the ignition source

Answer 46

Capable of being ignited by energy of the ignition source Close enough to ignition source for heat to transfer Capable of absorbing and retaining head from ignition source

Question 47

The following are four generally accepted classifications of fire cause

Answer 47

Accidental Natural Incendiary Undetermined

Question 48

What might be used as an interim classification of fire cause until the final outcome can be decided

Answer 48

Undetermined

Question 49

Potential motives for fire crimes

Answer 49

``` Revenge Vandalism Profit (fraud) Crime concealment Excitement (vanity, gratification) Pyromania Extremism (terrorism) ```

Question 50

What motive for fires starting is the largest and most common contributor or category, 50 percent

Answer 50

Revenge | or personal or professional, vendettas

Question 51

What is often the target of revenge motives

Answer 51

Personal property

Question 52

Accelerants are not usually used in revenge fires because

Answer 52

They aren't planned in advance and are impulsive

Question 53

How many people usually set vandalism fires

Answer 53

Two or more, typically juveniles.

Question 54

If vandalism is found inside a building entry was typically made how

Answer 54

Forced by the vandal

Question 55

Monetary gain is the primary motivator for this type of motive and total property destruction is often the goal

Answer 55

Profit or fraud

Question 56

Holes are often made in the building in order to facilitate what during intentionally set fires

Answer 56

Facilitate faster fire spread

Question 57

Who often set elaborate fires that require a lot of prep

Answer 57

Building owners

Question 58

Usually fires started to cover a crime are started where

Answer 58

At the point of entry or exit, or where the item was taken from

Question 59

Fire covering is typically started with items on hand and not flammable fluids because

Answer 59

They enter with intent to steal not arson

Question 60

Fires to cover homicide are typically started with

Answer 60

Ignitable liquids

Question 61

Embezzlement fires are started to destroy

Answer 61

A paper trail, sometimes ignitable liquid used

Question 62

Fires started for excitement or vanity movies are done so that the person feels what

Answer 62

Empowerment over society and personal satisfaction

Question 63

Examples of patterns for arson fires include

Answer 63

``` Dates and day of week Time of day Type of structure How fire is set Where fire is set ```

Question 64

Arson who wish to be viewed as heroes may do what

Answer 64

Set and "discover" fires and are always present on scene may may attempt to assist in efforts

Question 65

Pyromania

Answer 65

Psychological disorder where the sufferer has uncontrollable impulse to start fires to release tension or cause euphoria

Question 66

Pyromania as properly defined, is not a motive because

Answer 66

It is a psychological disorder

Question 67

Pyromania fires are not usually started with ignitable liquids and are typically done with what and where

Answer 67

Paper products in vehicles and alleys often in multiple places around the city

Question 68

Most juvenile fire starters do so out of psychological conflict, revenge or attention between the ages of

Answer 68

8-13

Question 69

Children under the age of what often experiment with fire out of curiosity

Answer 69

7

Question 70

Juveniles between what ages are often placed in detention settings and have a long history of fire abuse

Answer 70

15-18

Question 71

Majority of fire starters are what gener

Answer 71

Male and have poor social skills