Fire Behavior

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Fire Behavior
2010-10-05 23:57:00

Fire Behavior
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  1. What is anything that accupies space and has mass?
  2. What is a chemical reaction between two or more materials that changes the materials and produces heat, flames, and toxic smoke?
    Exothermic heat reaction
  3. What is a chemical reaction in which a substance aborbs heat energy?
    Endothermic heat reaction
  4. What is an exothermic chemical reaction called that releases energy in the form of heat and sometimes light?
  5. How are modes of combustion differentiated?
    Based on where the reaction is occurring
  6. What are the components of the fire triangle?
    Fuel, Heat, and Oxygen
  7. What are the components of the fire tetrahedron?
    Heat, Oxygen, self-sustained chemical chain reaction, and Fuel
  8. Energy possesed by an object that may be released in the future is known as?
    Potential Energy
  9. Type of engery possesed by a moving object?
    Kinetic Energy
  10. The capacity to perform work is known as?
  11. What is the measure for heat energy in the International System of Units?
  12. What is the measure for heat energy in the customary system?
    British Thermal Unit
  13. The chemical decomposition of a substance through the action of heat is known as?
  14. Two forms of ingnition?
    Piloted, and Auto-ingnition
  15. What is the temperature to which the surface of a substance must be heated for ignition and self-sustained combustion to occur?
    Auto-ignition temperature
  16. Most common source of heat in combustion reactions?
    Chemical heat energy
  17. What is a form of chemical heat energy that occurs when a material increases in temperature without the addition of external heat?
  18. What happens to the rate of the oxidation reaction as more heat is generated and held by the materials insulating the fuel?
    It increases
  19. What type of energy is generated by friction or compression?
    Mechanical heat energy
  20. The transfer of heat within a body or to another body by direct contact?
  21. The tranfer of heat energy from a fluid to a solid surface?
  22. Transmission of energy as an electromanetic wave?
  23. Material that absorbs heat but does not participate actively in the combustion reaction?
    Passive agent
  24. The material or substance being oxidized or burned in the combustion process is known as?
  25. Gases with vapor desity of less than 1 will?
  26. The ratio of the mass of a given volume of a liquid compaired with the mass of an equal volume of water at the same temperature?
    Specific gravity
  27. What is the transformation of a liquid to a vapor or gaseous state?
  28. What is the temperature at which a liquid gives off sufficant vapors to ignite, but not sustain, combustion?
    Flash point
  29. What is the tempature at which sufficent vapors are being generated to sustain the combustion reaction?
    Fire point
  30. The extent to which a substance will mix with water?
  31. Materials that will mix in any proportion in water are?
  32. The surface area of a fuel in proportion to its mass is called?
    Surface-to-mass ratio
  33. What is the total amount of energy released when specific amount of a given fuel is oxidized?
    Heat of combustion
  34. What is the energy released per unit of time as a given fuel burns?
    Heat release rate
  35. What is known as the range of concentraions of the fuel vapor and air?
    Flammable range
  36. Exposure to which of the following substances is frequently idenified as the cause of death for civilian fire fatalities?
    Carbon Monoxide
  37. Substance that acts to prevent the body from using oxygen at the cellular level and is a byproduct of the combustion of polyurethane foam?
    Hydrogen cyanide
  38. Substance is a product of complete combustion of organic materials and acts as a simple asphyxiant by displacing oxygen?
    Carbon Dioxide
  39. Substance is a colorless liquid with a pungent choking odor, and is irritating to the mucous membranes?
  40. Which of the following is substances is a colorless to clear yellew liquid with a bitter almond odor?
  41. Colorless liquid with a weak, suffocating odor?
  42. Type of fire involve flammable and combustible liquids and gases?
    Class B
  43. Type of fire involve ordinary combustible materials?
    Class A
  44. Type of fire involve energized electrical equipment?
    Class C
  45. Type of fire containing combustible metal?
    Class D
  46. Types of fire involve oils and greases normally found in commercial kitchens?
    Class K
  47. When suffcient oxygen is available and fire development is controlled by the characteristics and configuration of the fuel is said to be?
    Fuel controlled
  48. The 1st stage of the burning process in a confined space in which the substance being oxidized is producing some heat, but the heat has not spread to other substances nearby, is known as?
    the incipient stage
  49. type of ingnition is caused when a material reaches its auto-ignition temp as the result of self-heating?
  50. Mushrooming, in scientific terms, is known as?
    ceiling jet
  51. thermal layering of gases is the tendency of gases to form into layers according to temp and is also known as?
    Heat stratification
  52. Pockets of flame maybe observed moving through the hot gas layer above the neutral plane, a phenomenon known as?
  53. A condition wher the unburned fire gases accumulate at the top of the compartment ignite and flames propagate through the hot gas layer or across the ceiling is?
  54. Temp in a compartment results in the simltaneaous ignition of all the combustible contents in the space?
    Flash over
  55. Fire stage that occurs when all combustible materials in the compartment are burning is known as the?
    Fully developed stage
  56. Fire stage in which the oxygen concentration falls to the point where flaming combustion can no longer be supported is known as the?
    Decay stage
  57. Increase in ventilation can result in a deglagration called?
    Back draft
  58. The most fundamental fuel characteristics influencing fire development in a compartment?
    Mass and surface area
  59. All other things being equal, how will a fire in a large compartment develop compared to one in a small compartment?
    More slowly
  60. One of the most common methods of fire control and extinguishment?
    Cooling with water
  61. When does water have it's greatest effect on fire?
    As it vaporizes into steam
  62. The preferred method of extinguishing pressurized gas fires?
    Stopping the flow of liquid or gaseous fuel by closing a valve
  63. Used to extinguish rangetop fires when a cover is placed on a pan of burning grease?
    Oxygen exclusion