Fire Safety SCBA Flashcards
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Questions and Answers

What are the three things that must be present at the same time to produce the chemical reaction that is fire?

  • Oxygen, Water, Fuel
  • Oxygen, Heat, Wood
  • Oxygen, Heat, Fuel (correct)
  • Heat, Water, Fuel

What does the fire triangle consist of?

Oxygen, Heat, Fuel

What are some things that produce heat?

Static electricity, friction, chemicals that react with one another.

What are the fuel classifications that need to be known for correctional professionals?

<p>Class A, Class B, Class C, Class D</p> Signup and view all the answers

What must be on fire to be considered a 'Class A' fire?

<p>Common combustible material: Wood, cloth, plastics, trash, paper.</p> Signup and view all the answers

What is the most common type of fire?

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

What fire class is represented by an icon of a trash bin?

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

What must be on fire to be considered a 'Class B' fire?

<p>Flammable liquids and gases: Gasoline, oil, grease.</p> Signup and view all the answers

What must be on fire to be considered a 'Class C' fire?

<p>Anything energized by an electrical current that is plugged in.</p> Signup and view all the answers

Class C fires can change class by what action?

<p>Removing the electric source.</p> Signup and view all the answers

What icon represents a 'Class C' fire on fire extinguishers?

<p>An electrical outlet with a cord.</p> Signup and view all the answers

What must be on fire to be considered a 'Class D' fire?

<p>Metal combustible materials: magnesium, sodium, potassium.</p> Signup and view all the answers

What type of fire is a Class K fire?

<p>Kitchen fires.</p> Signup and view all the answers

How do portable fire extinguishers work?

<p>By removing oxygen, smothering, and/or reducing heat.</p> Signup and view all the answers

What are the three most common types of fire extinguishers?

<p>Water, Carbon Dioxide (CO2), Dry Chemical.</p> Signup and view all the answers

Why are air-pressured water extinguishers the least common?

<p>Because they are only effective against Class A fires.</p> Signup and view all the answers

What is the most common type of fire extinguisher?

<p>A-B-C type (dry chemical).</p> Signup and view all the answers

What do Carbon Dioxide fire extinguishers do?

<p>They expel non-flammable gas CO2 to cool the fire and smother it.</p> Signup and view all the answers

Why are Dry Chemical extinguishers so effective?

<p>They interrupt the chemical reaction of a fire.</p> Signup and view all the answers

Study Notes

Fire Triangle Components

  • Three elements necessary for fire: Oxygen, Heat, and Fuel.
  • Oxygen must be in sufficient quantity to sustain combustion.
  • Heat must reach the ignition temperature for a fire to start.
  • Fuel refers to any combustible material available for burning.

Fire Classifications

  • Class A: Involves ordinary combustibles like wood, paper, cloth, and trash, produces ash when burned.
  • Class B: Consists of flammable liquids and gases, including gasoline, oil, and propane.
  • Class C: Pertains to energized electrical equipment, can change class if unplugged from the power source.
  • Class D: Involves combustible metals, such as magnesium and sodium, requires specific extinguishing agents.

Class Fire Icons

  • Class A fires represented by a trash bin icon due to common combustible materials.
  • Class C fires denoted by electrical outlet imagery on extinguishers.

Special Fire Classes

  • Class K fires, also known as Kitchen fires, addressed primarily in kitchen settings, especially for fryer fires.

Fire Extinguisher Mechanics

  • Portable fire extinguishers function by removing oxygen, smothering flames, or reducing heat.
  • Common Extinguisher Types:
    • Water extinguishers are effective solely on Class A fires.
    • Carbon Dioxide (CO2) extinguishers control both Class A and B fires; they can cool the fire and displace oxygen.
    • Dry Chemical extinguishers are versatile, effective on Classes A, B, and C.

Extinguisher Effectiveness

  • Air-pressured water extinguishers are the least common due to safety concerns with flammable and electrical fires.
  • CO2 extinguishers cool flames and replace oxygen but may allow Class A fires to reignite due to insufficient oxygen removal.
  • Dry Chemical extinguishers are widely used for their ability to combat multiple fire classes effectively.

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Test your knowledge on fire safety concepts with these flashcards focusing on the fire triangle and the essential requirements for combustion. Perfect for learners and professionals in firefighting and safety training.

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