Question 25 of 30
A definite advantage of using water as a firefighting agent is its characteristic of:
A
Breaking down chemical bonding chains safely
B
Non-conductivity near live machinery
C
Rapid expansion as water absorbs heat and changes to steam
D
Leaving clean residue that acts as a fire barrier
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Answer & Explanation
The correct answer is Option C: Rapid expansion as water absorbs heat and changes to steam.
Water's high latent heat of vaporization means it absorbs a significant amount of heat as it turns to steam. This rapid expansion (Option C) helps to cool the burning material and can also help to push flames away from the surface.