Ifsta 6 Wfa Ch. 19 Fire Origin And Cause Determination

Front 1

The area of origin is the location:

Back 1

A. where the fire began.
B. with the most charring.
C. where ignition took place.
D. with places where fire patterns can be determined.

Hint 1

A. where the fire began.

Front 2

Which of the following is an indicator of fire cause?

Back 2

A. Smoke
B. Fuel source
C. Extinguisher
D. Water supply

Hint 2

B. Fuel source

Front 3

Control of all evidence must be maintained as part of the ___ required in legal cases.

Back 3

A. area of origin
B. chain of custody
C. fire investigation
D. collection of evidence

Hint 3

B. chain of custody

Front 4

Where should a firefighter or investigator start searching for area of origin for a structure fire?

Back 4

A. Inside the burned area
B. Outside of the structure
C. Left of the burned area
D. Right of the unburned area

Hint 4

B. Outside of the structure

Front 5

When working on interior examination a firefighter should work from:

Back 5

A. the right side of the structure to the left side.
B. the left side of the structure to the right side.
C. area of greatest damage to area of least damage.
D. area of least damage to area of greatest damage.

Hint 5

D. area of least damage to area of greatest damage.

Front 6

Which of the following may appear on floors and indicate where fuel burned in that location?

Back 6

A. Debris
B. Charring
C. Flashover
D. Fire pattern

Hint 6

B. Charring

Front 7

Which of the following statements is MOST accurate about total structural fire loss?

Back 7

A. Fire indicators will exist.
B. Ventilation factors can be determined.
C. There is no need for a fire investigation.
D. It is difficult to locate the greatest damage.

Hint 7

D. It is difficult to locate the greatest damage.

Front 8

Which of the following should a firefighter know when dealing with ground cover fires?

Back 8

A. Topography
B. Time of day
C. Manmade barriers
D. Number of people involved

Hint 8

A. Topography

Front 9

Which of the following factors affect the rate and direction of the spread of exterior fires?

Back 9

A. Time of day
B. Wind direction
C. Basic fire behavior
D. Unburned material

Hint 9

B. Wind direction

Front 10

Which of the following statements is MOST accurate about exterior fires?

Back 10

A. The area of origin may display unburned materials.
B. All sides of grass stems and tree trunks will be burnt.
C. Grass will fall away from the area of origin as it burns.
D. White ash appears on the underside of remaining debris.

Hint 10

A. The area of origin may display unburned materials.

Front 11

Air bags in a vehicle fire should be:

Back 11

A. purposely deployed for testing.
B. not handled to preserve evidence.
C. deployed while conducting a survey.
D. inoperable before beginning interior survey.

Hint 11

D. inoperable before beginning interior survey.

Front 12

To determine fire cause a firefighter should look for:

Back 12

A. evidence and debris.
B. an ignition source and sequence.
C. the most charring and spoliation.
D. witnesses and suspicious individuals.

Hint 12

B. an ignition source and sequence.

Front 13

Which type of fire cause occurs when humans are not involved in the ignition process?

Back 13

A. Natural
B. Accidental
C. Incendiary
D. Undetermined

Hint 13

A. Natural

Front 14

Which type of fire cause is used when specific cause has not been determined?

Back 14

A. Natural
B. Accidental
C. Incendiary
D. Undetermined

Hint 14

D. Undetermined

Front 15

What is the MOST obvious sign of fire cause?

Back 15

A. Large amount of debris
B. Consistent fire pattern
C. Competent ignition source
D. Considerable amount of charring

Hint 15

C. Competent ignition source

Front 16

Signs of arson are determined when initial cause is indicated as:

Back 16

A. exterior or interior fire.
B. structure or vehicle fire.
C. natural or accidental fire.
D. incendiary or undetermined fire.

Hint 16

D. incendiary or undetermined fire.

Front 17

Which of the following may have an effect on the natural path of fire spread?

Back 17

A. Burglary tools
B. Containers or cans
C. Wind direction and velocity
D. Time of arrival and extent of fire

Hint 17

C. Wind direction and velocity

Front 18

What information should be noted about unusual odors during a fire investigation?

Back 18

A. If the odor was not present during the fire
B. If the odor has an aroma of something similar to smoke
C. If the odor can be detected after coming out of the smoke
D. If the odor is more than 20 feet (6.1 m) outside of the structure

Hint 18

C. If the odor can be detected after coming out of the smoke

Front 19

Which of the following signs of arson may be used to allow fire spread?

Back 19

A. Trailers
B. Fire patterns
C. Unusual odors
D. Structural alterations

Hint 19

D. Structural alterations

Front 20

Which of the following can trace how a fire spread?

Back 20

A. Debris
B. Charring
C. Flashover
D. Fire pattern

Hint 20

D. Fire pattern

Front 21

Preserving evidence is the responsibility of:

Back 21

A. firefighters only.
B. police officers only.
C. fire investigators only.
D. fire officers and firefighters.

Hint 21

D. fire officers and firefighters.

Front 22

Who may have to adjust security measures in place or implement additional measures?

Back 22

A. Police officer
B. Fire investigator
C. Fire officers and firefighters
D. Police officers and firefighters

Hint 22

B. Fire investigator

Front 23

The perimeter of a structure fire may be expanded to encompass the area surrounding the building and:

Back 23

A. where odors are most prominent.
B. the farthest piece of debris found.
C. most of the inside of the structure.
D. any potential evidence that is located outside.

Hint 23

D. any potential evidence that is located outside.

Front 24

Which of the following statements is MOST accurate about procedures for criminal investigation?

Back 24

A. As long as a log is kept, anyone can enter the perimeter scene.
B. The staging area should be within the perimeters of the scene.
C. A log should be kept of all authorized persons who enter and leave incident perimeter.
D. Evidence should be marked after the examination, documentation, and collection has occurred.

Hint 24

C. A log should be kept of all authorized persons who enter and leave incident perimeter.

Front 25

Firefighters should keep evidence ___ until investigator arrives.

Back 25

A. clean
B. hidden
C. untouched
D. under lock and key

Hint 25

C. untouched

Front 26

How are overhaul operations detrimental to an investigation?

Back 26

A. It can secure evidence.
B. It can destroy evidence.
C. It can shelter evidence.
D. It can preserve evidence.

Hint 26

B. It can destroy evidence.

Front 27

Which of the following is a potential source of contamination during evidence preservation?

Back 27

A. Clearing out loose debris
B. Charred documents that are unreadable
C. Smoking materials that have been dropped
D. Damaged equipment while putting out the fire

Hint 27

C. Smoking materials that have been dropped

Front 28

Which of the following occurs when movement, change, or alteration of evidence prevents obtaining value?

Back 28

A. Spoliation
B. Alteration
C. Limitation
D. Detoxification

Hint 28

C. Limitation

Front 29

A structure may be secured and turned over to the owner/occupant once a fire is out and:

Back 29

A. debris is cleared.
B. investigation is completed.
C. charred evidence is secured.
D. written documents are obtained.

Hint 29

A. debris is cleared.