Ch. 6 Quiz
What does the acronym BLEVE stand for?
Boiling Liquid Expanding Vapor Explosion
Which form of energy causes spontaneous heating of a pile of linseed oil-soaked rags
Chemical
What is the relationship between resistance and heat as electricity flows through a wire
As resistance increase, heat increases
For the fire tetrahedron, which component is added and unites the three originally found in the fire triangle?
Chemical chain Reaction
Flammable liquid fires are considered class
Class B
Which class of fire extinguisher is used to fight a fire involving energized electrical fires?
Class C
What is a term for rapid oxidation that produces heat and light
Combustion
What is the lowest temperature at which a fuel-air mixture will ignite spontaneously called
Ignition Temperature
Of the following states of matter, which one assumes the shape of the container, will typically expand when heated, and has no independent shape?
Liquid
Friction is a form of Energy
Mechanical
Which of the following statements is true about the characteristics of the chemistry of fire?
Fire is neither solid nor liquid
The flash point of gasoline is
-45 degrees (-43 celsius)
When combined, which of the following elements form a hydrocarbon?
Hydrogen and carbon
Which of the following types of energy is converted to heat when two materials rub against each other and create friction?
Mechanical
Heat traveling from one end of steel beam to the other end is an example of
Conduction
Which method of fire spread involves the process of transferring heat through matter by movement of the kinetic energy from one particle to another?
Conduction
The movement of heated gases in a fire is an example of which form of heat transfer
Convection
Which method of fire spread involves air currents in a room or building moving the fire around the room?
Convection
What term is used to describe the lowest temperature at which a liquid produces enough vapor to sustain a continuous fire?
Flame Point
What is another term for fire point
Flame point
What is the term for lowest temperature at which a liquid produces enough vapor to sustain a continuous fire
Flame point
What is the term for the lowest temperature at which a liquid produces enough flammable vapor to burn momentarily
Flash point
What is the term for the process in which oxygen combines chemically with another substance to create a new compound
Oxidation
Which of the following are major components of smoke, which is a product of combustion?
Particles, Vapors, Gases
What is the process called when a material decomposes upon being exposed to heat in the absence of oxygen
Pyrolysis
Solid fuels don't actually burn so they must first be heated or _______ to decompose into a vapor.
Pyrolyzed
What is the term for the spontaneous ignition of hot gases at the upper level of a room
Rollover
Which of the following terms refers to the spontaneous ignition of hot gases in the upper levels of a room or compartment?
Rollover
Which of the following terms defines the layering of gases as they are heated in an enclosed space?
Thermal Layering
Which of the following is caused by the introduction of oxygen into an enclosure where the superheated gases and contents are already hot enough for ignition but do not have sufficient oxygen to combust?
Backdraft
Which of the following components is not part of the fire triangle?
Chemical Chain reaction but the 3 components are Oxygen, heat, fuel
Which class of fire extinguisher is used to fight a fire involving combustible cooking oils and fats in kitchens?
Class K
Which of the four extinguishment methods is the most commonly used by fire fighters?
Cool the burning Material
Which phase of solid fuel fire development is the period when the fire is running out of fuel?
Decay Phase
What is the method of choice for extinguishing most Class B fires
Excluding the oxygen
What is another term for flammability limits
Explosive limits
What term is used to describe the lowest temperature at which a liquid produces a flammable vapor that will support a small flame for a short period of time?
Flash point
If the temperature is rising in a room where a rollover is occurring, it will get hot enough for which of the following?
Flashover
Which of the following conditions must be present for a vapor and air mixture to ignite for liquid fuel fires?
Fuel and air mixture must be in the flammable range. An ignition source with enough energy to start ignition must exist. Ignition and fuel sources must be in contact long enough to transfer energy.
Which phase of solid fuel fire development produces the maximum release of energy?
Fully Developed Phase
Flashover begins during which phase of fire
Fully developed
As a fire continues to grow and the amount of heat generated increases, you may notice small flames "dancing" in the hot gas layer. These isolated flames are an indication of
Gases being within their flammable range
With a room and contents fire, which phase of fire development draws additional fuel into the fire?
Growth Phase
What term is used to describe the weight of a gas fuel and measures the weight of the gas compared to air?
Vapor Density
An endothermic reaction is one that
absorbs heat
