Fire Technology and Arson Investigation Quiz
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Questions and Answers

Which of these options is commonly used to put out Class C fires?

  • Foam
  • Water
  • CO2 (correct)
  • Dry powder

    • What can extinguish Class A fires?

    Water

    A fire which uses a flammable liquid as fuel is classified as?

    Class B Fire

    Excess heat energy liberated by an oxidation reaction is called ______________.

    <p>Heat of combustion</p> Signup and view all the answers

    What is the minimum temperature at which a fuel will burn?

    <p>Ignition temperature</p> Signup and view all the answers

    What descriptive term refers to a material that promotes rapid cooling?

    <p>Hydrant key</p> Signup and view all the answers

    What is the lowest temperature of a liquid in an open container to support continuous combustion?

    <p>Fire point</p> Signup and view all the answers

    What temperature denotes the point at which a flammable liquid ignites?

    <p>Flash point</p> Signup and view all the answers

    What is the minimum temperature necessary for self-contained combustion?

    <p>Ignition temperature</p> Signup and view all the answers

    An exothermic chemical change where combustible material reacts with an oxidizing agent is called?

    <p>Oxidation</p> Signup and view all the answers

    What term describes rapid oxidation accompanied by heat and light?

    <p>Combustion</p> Signup and view all the answers

    What process describes the chemical decomposition of matter through heat?

    <p>Pyrolysis</p> Signup and view all the answers

    What measures the rate of heat flow through a unit area?

    <p>Thermal conductivity</p> Signup and view all the answers

    What method of heat transfer occurs as energy travels in waves?

    <p>Radiation</p> Signup and view all the answers

    What is classified as arson and set on purpose with motives?

    <p>Intentional fire</p> Signup and view all the answers

    What term describes the malicious and willful burning of a building?

    <p>Arson</p> Signup and view all the answers

    What is known as ignition heat?

    <p>Heat</p> Signup and view all the answers

    What refers to gases liberated by heat?

    <p>Free radicals</p> Signup and view all the answers

    What refers to the normal pattern of fire and smoke movement within a building?

    <p>Thermal balance</p> Signup and view all the answers

    In what phase of fire is the maximum heat developed?

    <p>Free burning phase</p> Signup and view all the answers

    What does a burnt pattern of an inverted cone indicate?

    <p>The fingerprint of fire</p> Signup and view all the answers

    What occurrence involves a sudden burst of flames due to heat reaching the ignition temperature?

    <p>Flashover</p> Signup and view all the answers

    What explosive condition occurs due to a sudden introduction of oxygen?

    <p>Backdraft</p> Signup and view all the answers

    What is the primary objective in investigating fires? (Select all that apply)

    <p>To determine its cause</p> Signup and view all the answers

    What type of fires are caused by unforeseen acts of God?

    <p>Providential</p> Signup and view all the answers

    What combination of elements is known as the fire triangle?

    <p>Fuel, heat, oxygen</p> Signup and view all the answers

    What is the most important part of the fire triangle?

    <p>Fuel</p> Signup and view all the answers

    What means of heat transfer involves a circulating medium?

    <p>Convection</p> Signup and view all the answers

    What is the amount of heat needed to convert solid to liquid?

    <p>Heat of fusion</p> Signup and view all the answers

    What is formed by incomplete combustion of acetylene?

    <p>Carbon black</p> Signup and view all the answers

    What is matter made up of fine particles condensed from vapor called?

    <p>Smoke</p> Signup and view all the answers

    What describes incandescent gases accompanied by oxidation?

    <p>Flame</p> Signup and view all the answers

    What is the threat to arson investigators after a fire has been contained?

    <p>Carbon monoxide poisoning</p> Signup and view all the answers

    What color of smoke with red flames indicates burning of rubber?

    <p>Red</p> Signup and view all the answers

    What is commonly used in fire-resistant materials?

    <p>Asbestos</p> Signup and view all the answers

    What form of static electricity is a common cause of providential fire?

    <p>Lightning</p> Signup and view all the answers

    What is the most common cause of accidental fires related to?

    <p>Smoking</p> Signup and view all the answers

    What device is used by an arsonist to spread a fire?

    <p>Trailer</p> Signup and view all the answers

    What is usually a combustible liquid that hastens the start of fire?

    <p>Accelerant</p> Signup and view all the answers

    What is the most common reason for arson cases?

    <p>Profit</p> Signup and view all the answers

    What is the result of slow oxidation of combustible material?

    <p>Spontaneous heating</p> Signup and view all the answers

    What term refers to the preparation of materials to start a fire?

    <p>Plants</p> Signup and view all the answers

    What substance forms when burning low-grade heavy oils?

    <p>Soot</p> Signup and view all the answers

    Which of the following is exempt from paying 0.01% of assessed value of the building?

    <p>Single family dwelling</p> Signup and view all the answers

    What is heat transfer by direct contact called?

    <p>Conduction</p> Signup and view all the answers

    What substance can cause an explosion when mixed in the proper proportion?

    <p>Fire trap</p> Signup and view all the answers

    What term describes changes where heat is absorbed before a reaction occurs?

    <p>Endothermic reaction</p> Signup and view all the answers

    What product results from incomplete combustion?

    <p>Soot</p> Signup and view all the answers

    What refers to the heat released during complete oxidation of organic fuel?

    <p>All of these</p> Signup and view all the answers

    What refers to the quantity of heat absorbed by a substance when changing states?

    <p>Latent heat</p> Signup and view all the answers

    What refers to the gas that remains when combustion products cool?

    <p>Fire gases</p> Signup and view all the answers

    What term describes fires caused by human error?

    <p>Accidental fires</p> Signup and view all the answers

    What is the primary component of wood?

    <p>Cellulose</p> Signup and view all the answers

    During which fire phase does the burnt inverted cone pattern develop?

    <p>Free burning phase</p> Signup and view all the answers

    What phase occurs when the fire can no longer support the flame?

    <p>Smoldering phase</p> Signup and view all the answers

    What color smoke indicates burning of nitrogen-containing materials?

    <p>Heavy brown smoke</p> Signup and view all the answers

    What material burns with greenish-yellow flames?

    <p>Chlorine manganese</p> Signup and view all the answers

    What material produces bright reddish-yellow flames when burned?

    <p>Calcium</p> Signup and view all the answers

    When black smoke with red and blue-green flames appears, what material is burning?

    <p>Asphalt shingles</p> Signup and view all the answers

    When potassium is used as a combustible material, what color flame may be observed?

    <p>Any of the three</p> Signup and view all the answers

    Study Notes

    Fire Classes and Extinguishing Agents

    • Class A fires can be extinguished using water.
    • Class B fires, fueled by flammable liquids, require specific extinguishing agents.
    • Class C fires are commonly put out with CO2.

    Fire Chemistry and Properties

    • Heat of combustion is the energy released during oxidation reactions.
    • Ignition temperature is the minimum temperature necessary for a fuel to start burning.
    • The fire point is the lowest temperature at which a liquid can continuously combust.
    • Flash point refers to the temperature at which vapors from a flammable liquid ignite.
    • Oxidation is an exothermic chemical reaction involving combustibles and oxidizing agents.

    Fire Behavior and Phases

    • Free burning phase is where maximum heat and destruction occur.
    • Flashover describes the rapid spread of fire resulting from heat reaching ignition temperature in combustible materials.
    • Backdraft occurs when smoldering fire receives a sudden influx of oxygen.

    Investigative Techniques and Patterns

    • Arson is malicious burning, and a fingerprint of fire can be identified through burn patterns.
    • Thermal balance outlines the movement of fire and gases in a structure under natural conditions.
    • The primary objective of fire investigation is to determine the cause of the fire.

    Electrical and Reactive Elements

    • Lightning is a significant natural cause of fires due to its high energy.
    • Heat transfer can occur via conduction (direct contact), convection (circulating medium), or radiation (waves).

    Fuel and Fire Triangle

    • The fire triangle consists of fuel, heat, and oxygen, with fuel being the most critical component.
    • Common household sources of accidental fires include smoking-related incidents.
    • Accelerants are substances that hasten fire ignition.

    Environmental and Chemical Factors

    • Carbon monoxide is a dangerous byproduct of incomplete combustion.
    • The color of smoke can indicate the materials consumed, with heavy brown smoke signaling nitrogen products and bright red flames often indicating burning rubber.
    • Soot is produced from incomplete combustion and is comprised of fine particles.
    • Plants refer to the preparation needed for starting a fire, which includes gathering combustibles.
    • Latent heat is the thermal energy absorbed during state changes in materials.
    • Free radicals are gases released by heat that can further affect combustion processes.
    • Intentional fires are classified as arson, based on motive and legal definitions.
    • Accidental fires generally stem from human error or negligence.
    • Profit is frequently the most common motive behind acts of arson.

    Building Fire Dynamics

    • As a fire burns, the shape of the burn pattern can indicate the fire's progression.
    • Smoke colors vary based on combustion materials, such as the greenish-yellow flames indicating chlorine manganese.

    Warning Signs and Risks

    • Overheating can lead to spontaneous combustion, especially in combustible materials.
    • The presence of carbon monoxide builds up during the smoldering phase of a fire, indicating decreased oxygen availability.

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    Description

    Test your knowledge on fire technology and arson investigation with these sample board questions. From fire classifications to extinguishing methods, this quiz covers essential terminology and concepts in the field. Perfect for students and professionals in fire science.

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