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Comapny Officer > 15 Origin And Cause Determination > Flashcards

15 Origin And Cause Determination Flashcards

1
Q

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

A

Least damage to most damage area

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2
Q

The area of greatest damage should not be assumed to be

A

The area of origin

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3
Q

For basic steps in determining area of origin

A

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

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4
Q

During cause determination when is the safety survey conducted

A

During the exterior search of the building

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5
Q

Part of fire pattern analysis is determining the order in which

A

The patterns were created

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6
Q

The goal of analyzing fire patterns is to determine

A

Fire spread from the area of origin

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7
Q

NFPA 921 describe fire patterns as

A

Visible or measurable physical effects that remain after a fire

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8
Q

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

A

On interior surfaces

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9
Q

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

A

Incipient phase

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10
Q

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

A

Smooth surfaces because rough surfaces of greater surface area

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11
Q

Plume generated fire pattern

A

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

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12
Q

Radiant heat forms in the hot gas later before flashover.

A

Hot gas layer fire pattern

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13
Q

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

A

Hot gas layer pattern

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14
Q

Ventilation generated fire pattern

A

Created by ventilation introduced to a fire, varies widely

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15
Q

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

A

Full-grown involvement fire pattern

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16
Q

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

A

Clean Burns, fire pattern

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17
Q

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

A

Pointers or arrows, fire pattern

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18
Q

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

A

Pointers or arrows

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19
Q

It regular patterns on floors indicate

A

No common pattern, fire follow the path of available feels

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20
Q

Saddle Burns, fire pattern

A

Fire that burns down through the floor over the joist

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21
Q

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

A

Protected areas, fire pattern

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22
Q

What retells the history of the fire

A

Measurable visible damage, patterns created from heat sources

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23
Q

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

A

Ventilation pattern. Not point of origin.

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24
Q

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

A

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

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25
Q

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

A

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

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26
Q

Vehicle fires can be divided into three areas of examination

A

Scene around
Exterior of vehicle
Interior

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27
Q

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

A

Engine
Cargo
Passenger compartments

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28
Q

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

A

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

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29
Q

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

A

Area of origin

30
Q

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

A

Competent ignition source

31
Q

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

A

Other objects

32
Q

Documenting rest angle during a vehicle fire means documenting

A

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

33
Q

Radial fire patterns show movement on

A

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

34
Q

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

A

All panels, wheels lids, bumpers, undercarriage and roof

35
Q

Damage to the lower portion of the windshield indicates

A

Fire spread from engine compartment to passenger

36
Q

Fire damage to the top of the windshield indicates

A

Fire spread from passenger compartment to engine compartment

37
Q

Documentation of cargo compartment should include

A 
Damage in interior 
Personal effects and their condition
Damage to spare tire
Damage to wiring
Fire pattern
38
Q

Photographs of each vehicle compartments should be taken how

A

From multiple angles of each compartment

39
Q

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

A

Outward in all directions

40
Q

Aspect

A

Direction slope faces in wildland fires NORTH S E W

41
Q

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

A

True

42
Q

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

A

LE or formal investigator

43
Q

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

A

Malicious, negligent, or with death resulting

44
Q

A competent ignition source must have three qualities

A

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

45
Q

Material first ignited

A

First Fuel that combusts from the ignition source

46
Q

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

A

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

47
Q

The following are four generally accepted classifications of fire cause

A

Accidental
Natural
Incendiary
Undetermined

48
Q

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

A

Undetermined

49
Q

Potential motives for fire crimes

A 
Revenge
Vandalism
Profit (fraud)
Crime concealment 
Excitement (vanity, gratification)
Pyromania
Extremism (terrorism)
50
Q

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

A

Revenge

or personal or professional, vendettas

51
Q

What is often the target of revenge motives

A

Personal property

52
Q

Accelerants are not usually used in revenge fires because

A

They aren’t planned in advance and are impulsive

53
Q

How many people usually set vandalism fires

A

Two or more, typically juveniles.

54
Q

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

A

Forced by the vandal

55
Q

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

A

Profit or fraud

56
Q

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

A

Facilitate faster fire spread

57
Q

Who often set elaborate fires that require a lot of prep

A

Building owners

58
Q

Usually fires started to cover a crime are started where

A

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

59
Q

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

A

They enter with intent to steal not arson

60
Q

Fires to cover homicide are typically started with

A

Ignitable liquids

61
Q

Embezzlement fires are started to destroy

A

A paper trail, sometimes ignitable liquid used

62
Q

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

A

Empowerment over society and personal satisfaction

63
Q

Examples of patterns for arson fires include

A 
Dates and day of week 
Time of day
Type of structure
How fire is set
Where fire is set
64
Q

Arson who wish to be viewed as heroes may do what

A

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

65
Q

Pyromania

A

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

66
Q

Pyromania as properly defined, is not a motive because

A

It is a psychological disorder

67
Q

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

A

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

68
Q

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

A

8-13

69
Q

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

A

7

70
Q

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

A

15-18

71
Q

Majority of fire starters are what gener

A

Male and have poor social skills

Comapny Officer (16 decks)

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