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

The correct answer is A. Class A. Class A is correct because it is specifically defined as fires involving ordinary solid combustibles - paper, wood, cloth, rubber, and many plastics - materials that leave ash when burned (a helpful detail for the "A = Ash" mnemonic). Class B covers flammable and combustible…

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Question

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

Options

AClass A
BClass B
CClass C
DClass D

How the community answered

(44 responses)

A
70% (31)
B
9% (4)
C
5% (2)
D
16% (7)

Explanation

Class A is correct because it is specifically defined as fires involving ordinary solid combustibles - paper, wood, cloth, rubber, and many plastics - materials that leave ash when burned (a helpful detail for the "A = Ash" mnemonic). Class B covers flammable and combustible liquids such as gasoline, oil, and grease, not solid materials. Class C applies to fires involving energized electrical equipment, where the live current is the distinguishing hazard. Class D is reserved for combustible metals like magnesium, titanium, and sodium, which require specialized extinguishing agents.

Memory tip: Think A = Ash - Class A fires burn ordinary materials that leave ash behind. Then chain the rest: B = Boiling liquids, C = Current (electrical), D = Dangerous metals.

Topics

#Fire Classes#Fire Safety#Class A Fires#Fire Suppression

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