Which material is typically associated with Class A fires (ordinary combustibles)?

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Prepare for the Chemistry 1LC Practical Test. Engage with multiple choice questions, interactive flashcards, and detailed explanations to enhance your understanding and boost your confidence for the exam.

Multiple Choice

Which material is typically associated with Class A fires (ordinary combustibles)?

Explanation:
Class A fires involve ordinary combustibles—materials that burn as solids and leave ash. Paper is a quintessential example because it’s a solid, organic substance that burns and forms ash, so cooling with water effectively stops the flame. Gasoline is a liquid fuel whose vapors ignite, so it belongs to Class B fires and often requires different extinguishing methods. A hot plate is a heat source, not a fuel class, and reactive metals burn in a separate category (Class D) that needs special extinguishing agents. So paper best fits Class A because it is a common solid that burns to ash and is cooled by water.

Class A fires involve ordinary combustibles—materials that burn as solids and leave ash. Paper is a quintessential example because it’s a solid, organic substance that burns and forms ash, so cooling with water effectively stops the flame. Gasoline is a liquid fuel whose vapors ignite, so it belongs to Class B fires and often requires different extinguishing methods. A hot plate is a heat source, not a fuel class, and reactive metals burn in a separate category (Class D) that needs special extinguishing agents. So paper best fits Class A because it is a common solid that burns to ash and is cooled by water.

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