CH 2 WK 1 Quiz Flashcards
A Class A fire involves what types of materials?
Ordinary cellulosic materials such as wood and paper as well as similar natural and synthetic materials like rubber and plastics
A Class B fire involves what types of materials?
Flammable gases and flammable or combustible liquids
A Class C fire involves what types of materials?
Natural and synthetic materials like rubber and plastics, which are energized by electrical circuits, wiring, motors, and other equipment
A Class D fire involves what types of materials?
Combustible metals
A Class K fire involves what types of materials?
Certain cooking media such as vegetable and animal fats and oils
NFPA 921 defines fire as which of the following?
A rapid oxidation process, which is a chemical reaction, resulting in the evolution of heat and light in varying intensities
The fire triangle consists of which of these components?
Fuel
Heat
Oxygen
What is a class 4 hazardous material per the U.S. Department of Transportation?
Flammable Solid
Flame spread refers to:
the speed with which the flame front (oxidation zone) moves across a fuel’s surface.
Temperature is a measurement of:
molecular movement.
What is a flame?
The visible, luminous body where the oxidation reaction is occurring
What is the effective heat of combustion?
The actual amount of energy that is released when fuel oxidizes in air
What is a premixed flame?
A flame where air is introduced before the point of combustion
What is a laminar flame?
A flame with a clearly defined combustion zone
What is a turbulent flame?
A flame with oxidation occurring within a generalized area but not in a steady geometric pattern
