Fire Investigator II

  1. Image Upload 1

    Which letter represents direction of north?
  2. Image Upload 2

    Which letter represents light char area?
  3. Image Upload 3

    Which letter represents location of sample and sample number?
  4. Image Upload 4

    Which letter represents vector arrow pointing to heat source?
  5. Interior finish can contribute to a fire:
    Affects the rate of fire buildup to flashover condition

    May contribute to fire extension thru flame spread over its surface

    May add to intensity of fire by contributing additional fuel

    May produce smoke and toxic gases that can contribute to life hazard and property damage
  6. Sawtooth roof
    A roof with alternating inclined planes of different angles
  7. Arched roof
    A curve-shaped roof
  8. Gambrel roof
    Slopes in two directions but with a change in slope on both sides
  9. Monitor roof
    Provides for ventilation, especially on industrial buildings
  10. Shed roof
    A roof that slopes in only one direction
  11. Two shed roofs that meet at their low points
    Butterfly roof
  12. Pitched down in two directions from a high point
    Gable roof
  13. Slopes in four directions
    Hip roof
  14. Forces that are crushing
  15. Forces that tend to pull
  16. Forces that cause material to slide past one another
  17. Type V construction is construction in which:
    The structural members are entirely of wood or other combustible materials
  18. Type IV construction is construction in which:
    Structural members (i.e. columns, beams, arches, floors, and roofs) are basically of heavy timber, unprotected wood with large cross sectional areas
  19. Type III construction is construction in which:
    All or part of the interior structural elements may be of combustible materials and exterior walls are required to be noncombustible or limited combustible
  20. Type II construction is construction in which:
    The structural elements are entirely of noncombustible or limited combustible material
  21. Type I construction is construction in which:
    Structural members are noncombustible and have a fire resistance rating
  22. A building material that contributes fuel to a fire is:
  23. Building construction types that are considered to be combustible:
    III, IV, and V
  24. Building construction types that are considered noncombustible:
    I and II
  25. A building material that does not contribute fuel to a fire is:
  26. Building construction can be classified into _________ basic types.
  27. Balloon framing is characterized by:
    Lack of fire stopping

    Wood studs continuous from foundation to eave line

    Joist rest on a ribbon board
  28. Steel is used with contrete in reinforced concrete construction because it provides:
    A resistance to shear strength that concrete alone lacks

    Tensile strength that concrete alone lacks

    Added compressive strength
  29. Fire protection of steel is accomplished by several methods:
    Encasing steel in a structure or material such as concrete

    The use of suspended ceilings as part of a fire-resistive floor and ceiling
  30. Floor joists are "fire cut" so that floors can:
    Collapse under fire stress without damaging walls
  31. When heated to temperatures found at most working fires, unprotected steel construction will:
    Lose strength
  32. Heavy timber construction is allowed for interior structural members in _________ construction.
    Type IV
  33. One feature common to all types of trusses is that if one member fails:
    The entire truss is likely to fail
  34. When determining fuel loads within a building, what two factors must be considered?
    Interior surface coverings and furnishings
  35. The type of roof that has inclined flat surfaces is called a _________ roof.
  36. A building having exterior walls of masonary construction and combustible structural members of substantial dimensions (also known as "heavy timber") is classified as _________ construction.
    Type IV
  37. During testimony, the fire investigator should:
    Avoid use of slang and professional jargon
  38. During pretrial preparation, the fire investigator should:
    Arrive at court early and dress in a manner suitable to the venue
  39. The success of a case in court often depends on:
    The performance of the fire investigator, even under duress
  40. The investigator, when assigned an incident, should know if they are expected to:
    Determine the origin or cause of the fire

    Produce a written or oral report

    Determine some other result of the fire
  41. A hypothesis should be based solely on:
    Empirical data collected by the investigator
  42. A hypothesis must withstand the test of deductive reasoning or the investigator should:
    Discard it as not provable
  43. The fire investigator does not have a truly provable hypothesis unless the hypothesis can:
    Stand the test of careful and serious challenge
  44. Systematic Approach for an Investigation:
    Recognize the need

    Define the problem

    Collect data

    Analyze the data (inductive reasoning)

    Develop a hypothesis

    Test the hypothesis
  45. As a general rule, anything that looks out of place should be checked by the investigator. Evidence collection should be guided by the principle that:
    It is easier to diregard collected items that prove to be unrelated than to recover important items that were left behind
  46. The investigator, when preparing to conduct an incident investigation should:
    Estimate the required tools, equipment, and personnel required to perform a smooth and productive investigation
  47. Fire/explosion Incident
    Receive the assignment

    Prepare for the investigation

    Conduct the investigation

    Collect and preserve evidence

    Analyze the incident

    Report findings
  48. The presence of a thick, oily soot on glass, including hydrocarbon residues, is positive proof of the presence of:
    Incomplete combustion
  49. Combustion
    Rapid reaction with the evolution of heat and light
  50. Deflagration
    Very rapid reaction with the evolution of heat and light as well as the generation of a very low intensity pressure wave of moving gases
  51. Explosion
    Very rapid reaction with the evolution of considerable heat accompanied by a disruptive effect
  52. Detonation
    Almost instantaneous reaction with the evolution of considerable heat accompanied by a violent disruptive effect and intense, high-speed shock wave
  53. Many deflagrations involve lighter-than-air gases. One example of such a gas is natural gas. Which of the following is not a lighter-than-air gas?

    C) Pentane
  54. 1: Only high explosives can achieve detonation.
    2: High explosives always produce high-order explosions.
    3: TNT can produce low-order explosions.

    C) 1 and 3 are true; 2 is false
  55. Order of Explosion


  56. The sudden conversion of potential energy (chemical or mechanical) into kinetic energy with the production and release of gases under pressure best defines a(n):
  57. The room or area where a fire began defines the:
    Area of origin
  58. Heat is measured in terms of British Thermal Units (BTUs). A British Thermal Unit is defined as the quanity of heat required to raise the temperature of:
    One pound of water 1oF
  59. The unit of heat energy known as a BTU is defined as _________ under standard conditions.
    The amount of heat required to raise one pound of water 1oF
  60. Combustible liquid
    A liquid with a flash point at or above 100oF
  61. Flammable liquid
    A liquid having a flash point below 100oF and having a vapor pressure not exceeding 40 psi absolute
  62. Ignitable liquid
    Any liquid or the liquid phase of any material that is capable of fueling a fire
  63. When surfaces exposed to thermal radiation reach ignition temperature more or less simultaneously, it is called:
  64. Chipping or pitting of concrete or masonry surfaces most nearly defines:
  65. Oxidation
    Oxygen combining with other substances
  66. Conduction
    Heat transfer by direct contact
  67. Convection
    Heat transfer by circulation thru a medium
  68. Radiant heat
    Heat energy carried by electromagnetic waves
  69. Spoilation is defined as:
    Loss, destruction, or material alteration of anything that is evidence or potential evidence
  70. A degree of temperature, as measured by a thermometer or other similar instrument, is a measurement of the _________ of heat.
  71. When a liquid fuel gives off enough vapors so that it can be ignited and burn momentarily, it has reached its:
    Flash point
  72. Solid or liquid aerosols, carbon monoxide, carbon dioxide, oxygen, nitrogen, and finely divided carbon particles are all incomplete combustion products referred to as:
  73. The heating of a steel beam that carries heat to an unexposed part of the building and starts another fire would be an example of:
  74. The warmth of the sun is an example of:
  75. The transition phase during a compartment fire where all contents reach their ignition temperature and simultaneously ignite is called:
  76. The decomposition of a compound into one or more other substances by heat alone is referred to as:
  77. The percentage of a flammable substance in air that will burn when in contact with an ignition source best defines:
    Flammable/explosive limit
  78. Heat energy carried by electromagnetic waves is defined as:
  79. Heat transferred by circulation within a medium such as a gas or liquid is:
  80. The lowest temperature at which a fuel in a normal atmosphere must be heated in order to start a self-sustained combustion independent of an ignition source is known as:
    Ignition temperature
  81. Vapor density is defined as the weight of:
    Gas as compared to the weight of air
  82. Backdraft may occur when:
    Oxygen is introduced into a fire that is oxygen deficient
  83. Heat transfer by direct contact from one body to another defines:
  84. The minimum temperature to which a substance must be heated in order to ignite under specific test conditions is:
    Ignition temperature
  85. 1: The investigator should ascertain the basis and extent of his/her authority to conduct the investigation.
    2: The authority to investigate is given to police officers, fire fighters, and fire marshals according to the law of the jurisdiction.
    3: Private fire investigators receive their authority according to the law of the jurisdiction.

    A) 1 and 2 are true; 3 is false
  86. Condition conductive to creating an explosive atmosphere in the storage, handling, and use of flammable and combustible liquids
    Concentration of vapor
  87. At which stage(s) of a structure fire will automatice sprinklers normally operate?
    Ceiling layer development or pre-flashover stage
  88. L.E.L
    Lower Explosive Limit
  89. Solid fuel is most dangerous
    As powder or dust
  90. The upper and lower concentrations of a vapor that will produce a flame at a given pressure and temperature are called:
    Flammable and explosive limits
  91. Four components of combustion characterized in fire tetrahedron:


    Oxidizing agent

    Uninhibited chemical chain reaction
  92. The rate of fire growth and development is determined by the:
    Physical and chemical properties of fuel and surface area of fuel array
  93. Factor(s) that control or influence the occurence of self-heating and self-ignition
    Rate of heat generation

    Effects of ventilation

    Insulating effects of the materials immediately surrounding
  94. A fire in the presence of high concentration of oxygen will:
    Burn faster
  95. When the oxygen concentration is below __________ percent, flaming combustion will not usually be supported.
    14 - 16
  96. In the fire tetrahedron, which is the reducing agent?
  97. The colder of two bodies will always absorb heat until both objects are the same temperature is explained by the principle of:
    Heat transfer
  98. Heat can travel throughout a burning building by one or more of three methods referred to as:
    Conduction, convection, and radiation
  99. The prime hazard of an oxidizer under fire conditions is its ability to:
    Yield oxygen to enhance combustion
  100. When determining fire spread in a structure, one of the most important factors to consider is:
    Ventilation openings
Card Set
Fire Investigator II
Study Cards Group II