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Question

Difficulty: MediumFire Safety and Classification

A fire breaks out in a maintenance shop's receiving area involving stacked wooden shipping pallets, cardboard packaging, and dry paper towels. Which class of fire extinguisher is specifically designated to extinguish fires fueled by these ordinary combustible materials?

  1. A
    Class C
  2. Class AAnswer
  3. C
    Class B
  4. D
    Class D

Answer

Class A fire extinguishers are designed for fires involving ordinary solid combustibles such as wood, paper, and cardboard.
Class A fire extinguishers are specifically rated for fires fueled by ordinary combustible materials such as wood, paper, cardboard, fabrics, and rubber. These fires leave an ash residue and are typically extinguished using water-based agents or multipurpose dry chemical powders that quench and cool the burning material below its ignition temperature.

Step-by-Step Solution

1
Identify the fuel source involved in the fire scenario.
The fuels are wooden pallets, cardboard boxes, and paper towels, which are classified as ordinary solid combustibles.
Fire extinguisher selection depends directly on the physical state and chemical nature of the burning material.
2
Match the identified fuel type to standard fire safety classifications.
Ordinary solid combustibles (wood, paper, textiles, plastics) correspond to Class A fires.
Standard fire safety taxonomy categorizes ordinary organic solids under Class A, requiring cooling or quenching extinguishing agents such as water or multipurpose dry chemicals.

Key Concept

Classification of fires by fuel source and corresponding extinguisher types
Estimated Time:45s
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Topics

Fire Safety and Classification

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