Fire Behavior

Define Ignition

• The process of initiating self-sustained combustion 

• The process of initiating sustained combustion 

 Define combustion

• Chemical process of combustion that occurs rapidly to produce heat and light 

• Chemical process of oxidation that occurs rapidly to produce heat and light 

• Chemical process of oxidation that occurs slowly to produce heat and light 

 Define heat of combustion

• Total amount of thermal energy that could be generated by chemical reaction if a fuel were completely burned 

• Total amount of energy that could be generated by combustion reaction if a fuel were completely burned 

• Total amount of thermal energy that could be generated by combustion reaction if a fuel were completely burned 

Define heat release rate

• The energy release per unit of time. Measured in km or horsepower. 

• The energy release per unit of time. Measured in kw or horsepower. 

What temperature range does flashover occur?

• 1000-1200 degrees F

• 1000-1500 degrees F

• 1200-2000 degrees F

What are the phases of fire in order?

• Ignition/incipient, fully developed, growth, decay

• Ignition/incipient, growth, fully developed, decay

• Ignition/incipient, growth, decay, fully developed

Signs of flashover?

• rollover, increased turbulence of the neutral plane, pyrolysis of materials, intense heat forcing crews lower, sudden lowering of neutral plane  

• rollover, decreased turbulence of the neutral plane, pyrolysis of materials, intense heat forcing crews lower, sudden lowering of neutral plane  

• rollover, increased turbulence of the neutral plane, pyrolysis of materials, intense heat forcing crews higher, sudden lowering of neutral plane  

What gas has the highest flammable range?

If a gas is said to be rich it means that it is?

• Above the flammable range 

• Below the flammable range 

 Identify the flow path directions. Click all that apply

• Bi-directional flow 

• uni-directional flow 

• Tri-directional flow