DATE: January 27, 2023
NAME: Steven John S. Timbang
CN #: 1810810181
ASSIGNMENT IN CDI6
1.
Q: What are the 6 Stages of Fire?
A:
There are six stages of fire growth.
1. Stage 1- Incipient-The incipient phase is characterized by localized flame to the
fuel source and low heat release.
2. Stage 2- Free burning- In the free burning stage intensity with lateral flame
movement and possible rollover are present with a rapid increase in room
temperature.
3. Stage 3 Flashover- flashover, the third stage is characterized by complete room
involvement when everything in the room reaches its ignition temperature. Survival
is not likely.
4. Stage 4- Post flashover-Post flashover is dependent on the availability of oxygen
and the amount of remaining fuel.
5. Stage 5- The decay- the decay stage is indicative of smoldering combustion as a
result of fuel sources decreasing.
6. Stage 6- Extinguished Phase (Decayed Stage) In this phase, the fire slowly gets
burnt out and the temperature also fails down rapidly.
2.
Q: What re the modes of hear transfer? Enumerate and explain briefly.
A: There are three modes of heat transfer:
1. Conduction
Heat conduction is a process in which heat is transferred from the hotter part to the colder
part of a body without involving any actual movement of the molecules of the body.
For example: When frying vegetables in a pan. Heat transfer takes place from the flame
to the pan and then to the vegetables.
2. Convection
In this process, heat is transferred in the liquid and gases from a region of higher
temperature to a region of lower temperature. Heat transfer through convection occurs
partly due to the actual movement of molecules or due to
The mass transfer.
For example: Heating of milk in a milk bowl.
3. Radiation
It is the process in which heat is transferred from one body to another body without
involving the molecules of the medium. Heat transfer through radiation does not depend
on the medium.
For exampl: Heat energy transfers from the sun to earth through radiation.
3. Q: As a criminology student, how can you relate the study of fire technology and
arson investigation to your future profession?
A: As a criminology student, studying fire technology and Arson Investigation is
important as it helps us to determine if a fire was accidental or deliberately set. It
will help us also to determine if a crime was committed and hopefully bring a
perpetrator to justice.