A chemical reaction that produces heat is
exothermic
A Class C fire involves
energized electrical equipment
A gas with a vapor density of __ will rise in air
0.1
An endothermic reaction is one that
absorb heat
during the ___ phase, fire has consumed either the available fuel or oxygen, and temperature drops
decay
Fires involving combustible cooking media, such as oils and grease, are considered class
K
Flammable liquid fires are considered class
B
Flashover occurs during which phase of fire
fully developed
Friction is a form of __ energy
mechanical
Heat transfer in the form of invisible waves is called
radiation
Heat traveling from one end of a steel beam to the other end is an example of
conduction
In which process is a new compound created from the combination of oxygen and another substance
oxidation
Matter exists in __ states
3
Smoke that is produce by ordinary household materials when they are first heated has which sort of apparance
Slow moving and white
The flash point of gasoline is
-45 F (-43 C )
The majority of fires are extinguished by which method
Cooling the fuel
The movement of heated gases in a fire is an example of which form of heat transfer
convection
The sudden introduction of air into an oxygen-depleted, superheated space may result in
backdraft
Turbulent smoke is an indication of impending
flashover
Upward spread of fire within a structure is primarily caused by which form of heat transfer
convection
what does smoke puffing in and out of a structure indicate
backdraft conditions
What is a danger to consider when attacking a class c fire
electrical injury
What is a term for rapid oxidation that produces heat and light
combustion
what is another term for fire point
flame point
what is another term for flammability limits
exposive limits
What is the lowest temperature at which a fuel-air mixture will ignite spontaneously called
ignition temperature
What is the method of choice fr extinguishing most Class B fires
Excluding the oxygen
What is the percentage of oxygen normally found in air
21 percent
What is the process called when a material decomposes upon being exposed to heat in the absence of oxygen
Pyrolysis
What is the relationship between resistance and heat as electricity flows through a wire
as resistance increase , heat increases
What is the second phase of fire
growth
what is the smallest unit of matter
an atom
What is the term for a rapid chemical process in which the combination of a substance with oxygen produces heat and light
Combustion
What is the term for high-volume, high- velocity, turbulent , ultra-dense black smoke
black fire
What is the term for temperature in a room reaching the point where all the combustible contents of the room ignite
flashover
What is the term for the 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
What is the term for the spontaneous ignition of hot gases at the upper level of a room
flameover
What is the vapor density of air
1.0
When water is converted to steam, it occupies __ space
much more
Which class of fire involves ordinary combustibles such as wood and paper
A
Which form of energy causes spontaneous heating of a pile of linseed oil-soaked rags
Chemical
Which form of heat transfer consists of kinetic energy moving from one particles to another
Conduction
Which form of heat transfer travels in all direction
Thermal radiation
Which geometric figure is used to represent the four elements required for a self-sustaining fire
tetrahedron
Which of the following is a component of a BLEVE
A pressurized flammable liquid vessel
Which of the following is a side of the fire triangle
heat
Which sign is an indication of possible backdraft condition
turbulent, pressurized smoke
Which situation is indicated if you open a door and the smoke rises and the opening clears out
The fire is above the level of the door
Which situation is indicated when you open a door and the smoke exits through the top half of the door and clean air enters through the bottom half
The fire is on the same level as the door
Which situation is indicated when you open a door and the smoke thins, but the smoke still fills the door
The fire is below the level of the door
Which state must a fuel be in for combustion to take place
vapor
Which term refers to the weight of a gas compared to air
vapor density
Which toxic gas is commonly produced by fire
Hydrogen cyanide
A chemical reaction that produces heat is
exothermic
A Class C fire involves
energized electrical equipment
A gas with a vapor density of __ will rise in air
0.1
An endothermic reaction is one that
absorb heat
during the ___ phase, fire has consumed either the available fuel or oxygen, and temperature drops
decay
Fires involving combustible cooking media, such as oils and grease, are considered class
K
Flammable liquid fires are considered class
B
Flashover occurs during which phase of fire
fully developed
Friction is a form of __ energy
mechanical
Heat transfer in the form of invisible waves is called
radiation
Heat traveling from one end of a steel beam to the other end is an example of
conduction
In which process is a new compound created from the combination of oxygen and another substance
oxidation
Matter exists in __ states
3
Smoke that is produce by ordinary household materials when they are first heated has which sort of apparance
Slow moving and white
The flash point of gasoline is
-45 F (-43 C )
The majority of fires are extinguished by which method
Cooling the fuel
The movement of heated gases in a fire is an example of which form of heat transfer
convection
The sudden introduction of air into an oxygen-depleted, superheated space may result in
backdraft
Turbulent smoke is an indication of impending
flashover
Upward spread of fire within a structure is primarily caused by which form of heat transfer
convection
what does smoke puffing in and out of a structure indicate
backdraft conditions
What is a danger to consider when attacking a class c fire
electrical injury
What is a term for rapid oxidation that produces heat and light
combustion
what is another term for fire point
flame point
what is another term for flammability limits
exposive limits
What is the lowest temperature at which a fuel-air mixture will ignite spontaneously called
ignition temperature
What is the method of choice fr extinguishing most Class B fires
Excluding the oxygen
What is the percentage of oxygen normally found in air
21 percent
What is the process called when a material decomposes upon being exposed to heat in the absence of oxygen
Pyrolysis
What is the relationship between resistance and heat as electricity flows through a wire
as resistance increase , heat increases
What is the second phase of fire
growth
what is the smallest unit of matter
an atom
What is the term for a rapid chemical process in which the combination of a substance with oxygen produces heat and light
Combustion
What is the term for high-volume, high- velocity, turbulent , ultra-dense black smoke
black fire
What is the term for temperature in a room reaching the point where all the combustible contents of the room ignite
flashover
What is the term for the 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
What is the term for the spontaneous ignition of hot gases at the upper level of a room
flameover
What is the vapor density of air
1.0
When water is converted to steam, it occupies __ space
much more
Which class of fire involves ordinary combustibles such as wood and paper
A
Which form of energy causes spontaneous heating of a pile of linseed oil-soaked rags
Chemical
Which form of heat transfer consists of kinetic energy moving from one particles to another
Conduction
Which form of heat transfer travels in all direction
Thermal radiation
Which geometric figure is used to represent the four elements required for a self-sustaining fire
tetrahedron
Which of the following is a component of a BLEVE
A pressurized flammable liquid vessel
Which of the following is a side of the fire triangle
heat
Which sign is an indication of possible backdraft condition
turbulent, pressurized smoke
Which situation is indicated if you open a door and the smoke rises and the opening clears out
The fire is above the level of the door
Which situation is indicated when you open a door and the smoke exits through the top half of the door and clean air enters through the bottom half
The fire is on the same level as the door
Which situation is indicated when you open a door and the smoke thins, but the smoke still fills the door
The fire is below the level of the door
Which state must a fuel be in for combustion to take place
vapor
Which term refers to the weight of a gas compared to air
vapor density
Which toxic gas is commonly produced by fire
Hydrogen cyanide