Fire Prevention and Response

Question 1

3 kinds of fires and their causes

Answer 1

fire triggered by natural hazards
fire triggered by human made conditions
fire due to mismanagement

Question 2

Example of Fire triggered by natural hazards

Answer 2

earthquake, volcanic eruption etc

Question 3

Example of Fire triggered by human-made conditions

Answer 3

faulty electrical, connections

Question 4

Example of Fire due to mismanagement

Answer 4

irresponsible handling of fire and negligence.

Question 5

Four things must be present at the same time in order to produce fire:

Answer 5

Fuel
Heat
Oxygen
Chemical reaction

Question 6

is a four-sided geometric representation of the four factors necessary for fire: fuel (any substance that can undergo combustion), heat (heat energy sufficient to release vapor from the fuel and cause ignition), oxidizing agent (air containing oxygen), and uninhibited chemical chain reaction (sufficient exothermic reaction energy to produce ignition).

Answer 6

Fire Tetrahedron

Question 7

is rapid oxidation at very high temperature.

Answer 7

fire combustion

Question 8

3 classes of fire

Answer 8

class a
class b
class c

Question 9

fires involving solid materials such as wood, paper or textiles.

Answer 9

class a

Question 10

fires involving flammable liquids such as petrol, diesel or oils.

Answer 10

class b

Question 11

fires involving gases.

Answer 11

class c

Question 12

4 stages of fire

Answer 12

1. incipient
2. growth
3. fully developed
4. decay

Question 13

This first stage begins when heat, oxygen and a fuel source combine and have a chemical reaction resulting in fire. This is also known as “ignition” and is usually represented by a very small fire which often (and hopefully) goes out on its own, before the following stages are reached. Recognizing a fire in this stage provides your best chance at suppression or escape.

Answer 13

incipient

Question 14

is where the structures fire load and oxygen are used as fuel for the fire. There are numerous factors affecting the growth stage including where the fire started, what combustibles are near it, ceiling height and the potential for “thermal layering”. It is during this shortest of the 4 stages when a deadly “flashover” can occur; potentially trapping, injuring or killing firefighters.

Answer 14

Growth

Question 15

When the growth stage has reached its max and all combustible materials have been ignited, a fire is considered fully developed. This is the hottest phase of a fire and the most dangerous for anybody trapped within.

Answer 15

Fully Developed

Question 16

Usually the longest stage of a fire, the decay stage is characterized a significant decrease in oxygen or fuel, putting an end to the fire. Two common dangers during this stage are first – the existence of non-flaming combustibles, which can potentially start a new fire if not fully extinguished. Second, there is the danger of a backdraft when oxygen is reintroduced to a volatile, confined space.

Answer 16

Decay