CHAPTER 5-6 TEST Flashcards
What term refers to a substance remaining chemically the same, but changing in size, shape, or appearance?
Physical change.
How can understanding the physical science of fire help firefighters?
It translates to practical knowledge of fire behavior.
When a substance changes from one type of matter to another, that has had a:
Chemical change.
What represents the amount of energy that an object can release in the future
Potential.
What type of reaction absorbs energy as it occurs?
Endothermic
What are the elements necessary to create fire in the model represented by the fire triangle?
Fuel, oxygen, and heat.
What best describes what the fire tetrahedron represents?
an uninhibited chemical chain reaction
What source of thermal Energy is the most common source of heat in combustion reactions?
Chemical energy
What method of heat transfer occurs when the material is heated as the result of direct contact with the heat source?
Conductive
What method of heat transfer can become the dominant mode as the fire grows in size?
Radiation
What type of fuel can be the most dangerous of all the types?
Gaseous
What type of fuel has a definitive size and shape?
Solid
Which fire development factors affects heat release rate?
Fuel type
What affects the amount of air entrained in the plume during the growth stage?
Location of fuel package
What is defined as the tendency of gases to form into layers according to temperature?
Thermal layering
The neutral playing in the growth stage is:
Interface of hot and cold layers at an opening
What stage of fire development occurs when all the combustible materials in a compartment are burning?
Fully developed
What is a heat indicator of the possible flashover?
Darkened windows