4AE3 U4 C4 Obj 2
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Questions and Answers

Which class of fire consists of ordinary combustible materials such as wood, cloth, paper, rubber, and many plastics?

  • Class B
  • Class A (correct)
  • Class C
  • Class D

    • What is the primary method associated with extinguishing a Class A fire?

  • Interruption of the combustion chain with dry chemicals
  • Coating the fuel with dry chemicals
  • Cooling the fire with water and water solutions (correct)
  • Interruption of the combustion chain by halogenated agents

    • Which type of fire extinguishing media coats the fuel, separating it from the oxygen in the air?

  • Dry chemicals (correct)
  • Water and water solutions
  • Halogenated agents
  • None of the above

    • What type of fire extinguishing media does not penetrate and soak the fuel like water does?

    <p>Dry chemicals (A)</p> Signup and view all the answers

    Which type of fire extinguishing media interferes with the self-sustaining chain reaction of the fire, causing it to go out?

    <p>Dry chemicals (A)</p> Signup and view all the answers

    What type of fire extinguishing media does not reduce the temperature of the fuel like water does?

    <p>Dry chemicals (A)</p> Signup and view all the answers

    Which type of fire extinguishing media interferes with the self-sustaining chain reaction of the fire, similar to dry chemicals?

    <p>Halotron (A)</p> Signup and view all the answers

    Which gas is an environmentally acceptable replacement for halon gases?

    <p>Halotron (D)</p> Signup and view all the answers

    What is the main reason for removing oxygen from the area during a fire?

    <p>To smother the fire (D)</p> Signup and view all the answers

    Why is carbon dioxide (CO2) not recommended for use on a Class A fire?

    <p>It does not cool the fuel (D)</p> Signup and view all the answers

    What is the main reason for banning halon gases in Canada?

    <p>Their harmful effect on the ozone layer (C)</p> Signup and view all the answers

    What can be used to smother Class A fires?

    <p>Fire blankets (A)</p> Signup and view all the answers

    Why is carbon dioxide (CO2) gas not recommended for use on a Class A fire?

    <p>It does not smother the fire (B)</p> Signup and view all the answers

    What happens when carbon dioxide (CO2) dissipates quickly after being discharged?

    <p>Oxygen can access the hot fuel (D)</p> Signup and view all the answers

    What is the main purpose of using fire blankets to smother Class A fires?

    <p>To remove oxygen from the area (A)</p> Signup and view all the answers

    Which type of fire extinguishing media is not recommended for use on a Class A fire because it does not cool the fuel?

    <p>Carbon dioxide (CO2) (C)</p> Signup and view all the answers

    What is the main reason for removing oxygen from the area during a fire?

    <p>To prevent the fire from spreading (C)</p> Signup and view all the answers

    Why is carbon dioxide (CO2) not recommended for use on a Class A fire?

    <p>It does not effectively smother the fire (D)</p> Signup and view all the answers

    What is the main reason for banning halon gases in Canada?

    <p>They contribute to ozone layer depletion (A)</p> Signup and view all the answers

    What happens when carbon dioxide (CO2) dissipates quickly after being discharged?

    <p>It allows oxygen to access the hot fuel (A)</p> Signup and view all the answers

    Which gas is an environmentally acceptable replacement for halon gases?

    <p>Halotron (C)</p> Signup and view all the answers

    What type of fire extinguishing media does not reduce the temperature of the fuel like water does?

    <p>Halotron (C)</p> Signup and view all the answers

    What is the primary method associated with extinguishing a Class A fire?

    <p>Applying water to cool the fuel (A)</p> Signup and view all the answers

    Which class of fire consists of ordinary combustible materials such as wood, cloth, paper, rubber, and many plastics?

    <p>Class A (B)</p> Signup and view all the answers

    Which type of fire extinguishing media coats the fuel, separating it from the oxygen in the air?

    <p>Dry chemicals (A)</p> Signup and view all the answers

    What is the main purpose of using fire blankets to smother Class A fires?

    <p>To exclude oxygen (C)</p> Signup and view all the answers

    What type of fire extinguishing media does not reduce the temperature of the fuel like water does?

    <p>Halotron (A)</p> Signup and view all the answers

    What happens when carbon dioxide (CO2) dissipates quickly after being discharged?

    <p>The fire is extinguished (D)</p> Signup and view all the answers

    Why is carbon dioxide (CO2) not recommended for use on a Class A fire?

    <p>It is not effective in cooling the fire (C)</p> Signup and view all the answers

    What is the main reason for removing oxygen from the area during a fire?

    <p>To exclude oxygen (B)</p> Signup and view all the answers

    Which class of fire consists of ordinary combustible materials such as wood, cloth, paper, rubber, and many plastics?

    <p>Class A (A)</p> Signup and view all the answers

    What is the primary method associated with extinguishing a Class A fire?

    <p>Cooling the fire with water (A)</p> Signup and view all the answers

    What type of fire extinguishing media coats the fuel, separating it from the oxygen in the air?

    <p>Dry chemicals (A)</p> Signup and view all the answers

    Why is carbon dioxide (CO2) not recommended for use on a Class A fire?

    <p>It does not cool the fuel (B)</p> Signup and view all the answers

    Which type of fire extinguishing media interferes with the self-sustaining chain reaction of the fire, causing it to go out?

    <p>Halotron (A)</p> Signup and view all the answers

    Which gas is an environmentally acceptable replacement for halon gases?

    <p>Halotron (B)</p> Signup and view all the answers

    What type of fire extinguishing media does not reduce the temperature of the fuel like water does?

    <p>Dry chemicals (C)</p> Signup and view all the answers

    Which type of fire extinguishing media is not recommended for use on a Class A fire because it does not cool the fuel?

    <p>Carbon dioxide (CO2) (A)</p> Signup and view all the answers

    What is the main reason for banning halon gases in Canada?

    <p>They deplete the ozone layer (C)</p> Signup and view all the answers

    What happens when carbon dioxide (CO2) dissipates quickly after being discharged?

    <p>It allows oxygen to access the hot fuel (D)</p> Signup and view all the answers

    Which type of fire extinguishing media interferes with the self-sustaining chain reaction of the fire, similar to dry chemicals?

    <p>Halotron (A)</p> Signup and view all the answers

    What is the main purpose of using fire blankets to smother Class A fires?

    <p>To remove oxygen from the area (D)</p> Signup and view all the answers

    Which gas is an environmentally acceptable replacement for halon gases?

    <p>Halotron (A)</p> Signup and view all the answers

    What type of fire extinguishing media coats the fuel, separating it from the oxygen in the air?

    <p>Water (C)</p> Signup and view all the answers

    Which class of fire consists of ordinary combustible materials such as wood, cloth, paper, rubber, and many plastics?

    <p>Class A (A)</p> Signup and view all the answers

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