Fire Investigation

Question 1

Fire can be defined as a ______ ______ in which a ______ combines with _______ with the production of ____

Answer 1

chemical
reaction
substance
oxygen
heat

Question 2

what are the three properties of the fire triangle?

Answer 2

Heat
Oxygen
Fuel

Question 3

Oxygen is __% of the air we breathe

Answer 3

21%

Question 4

What are the three possible states of fuel?

Answer 4

Gas
Liquid
Solid

Question 5

_____ is needed for a fire to start

Answer 5

Heat

Question 6

Conduction is the ______ of ____ through a solid ______ i.e doors, walls

Answer 6

transfer
heat
medium

Question 7

Convection is the ______ of heat within a _____ or __ by movement of the medium. i.e, warm air liberated by a convector heater.

Answer 7

passage
liquid
gas

Question 8

What is an example of radiation?

Answer 8

the heat felt from the sun

Question 9

What are the four products of combustion?

Answer 9

Carbon Dioxide
Carbon Monoxide
Water
Smoke

Question 10

What are the 5 phases of a fire?

Answer 10

Incipient Phase
Growth Phase
Fully developed phase
Decay Phase
Extinction Phase

Question 11

What are the 5 properties of radiation-induced flashover?

Answer 11

Flames spread horizontally across the ceiling in a room
Heat is radiated downwards
Radiated heat reaches approx 30kW/m2
Materials producing flammable pyrolysis products as smoke
Short while later individual items will burst into flames

Question 12

what is an example of Smouldering combustion

Answer 12

A burning cigarette

Question 13

What is the temperature of heat from a glowing combustion zone

Answer 13

600c

Question 14

Spontaneous combustion is the outbreak of ____ in ________ material due to internal ____ _____ caused by a chemical or biological action.

Answer 14

Fire
Combustive
Self Heating

Question 15

What are 5 examples of self-heating materials?

Answer 15

Animal feed
Beans
Carbon
Coal
Cotton
Foam and plastic
Hay
Hemp
Iron filings
Oils
Peat
Rags
Sawdust
Soap powder
Wood fibreboard
Wool

Question 16

10 safety rules when entering the scene of a fire?

Answer 16

Never enter a building without the permission of the fire officer (rank station officer or above)
Hard Hat
One piece overall (bright coloured)
Steel toe cap boots, puncture proof soles
Stout gloves
Eye protection
First aid kit
Good light
Make sure everyone knows where you are
Tetanus up to date

Question 17

What are the 4 most frequent sources of danger at the scene of a fire?

Answer 17

Weakening or collapsing walls/roofs/stairs
The presence and possible leakage of hazardous materials
Domestic services e.g electricity
Re-ignition

Question 18

What are the 6 roles of the crime scene investigator

Answer 18

Risk assessment 
preservation of the scene
assessment and advise
examination of the scene
photography of the scene
Identify, package and collect evidence

Question 19

What are the two main objectives of fire investigation?

Answer 19

Locate the seat of the fire

Establish the cause of the fire (arson or accidental)

Question 20

Rapidly developing fires or large fires produce ____ _____ locations

Answer 20

poor seat

Question 21

Where there is no flashover the seat of the fire can be found where?

Answer 21

at the lowest point of the burning

Question 22

What are the 6 signs that help locate the seat of the fire

Answer 22

Smoke
Directional burning patterns
Plaster
Distortion and melting
Burning of timber
Indirect Methods

Question 23

What are the 6 signs that Arson has taken place?

Answer 23

Multiple seats of fire
Presence of containers, matches etc
Pool shaped burning on floor materials
Smell of accelerants 
Evidence of delayed action devices
Petrol bomb remains

Question 24

4 Rules for collection arson evidence

Answer 24

Generous samples in an area that smells of accelerants
Loose debris - shovelful
Carpet or wood - square foot
Control samples