AFF Exit Exam • Set 7 Question 21 of 30
When water fog is used as an extinguishing agent, the fire is extinguished principally by the:
✓
Direct Answer
Option D: Absorption of heat
When water fog is applied to a fire, its primary extinguishing mechanism is the rapid absorption of heat. As the water vaporizes into steam, it cools the fuel below its ignition temperature.
All Options
A
Displacement of active fuel structures safely
B
Exclusion of atmospheric nitrogen elements
C
Chemical breakdown of active free radicals
D
Absorption of heat
(Correct Answer)
Detailed Explanation & Context
When water fog is applied to a fire, its primary extinguishing mechanism is the rapid absorption of heat. As the water vaporizes into steam, it cools the fuel below its ignition temperature.
Relevant Framework: STCW 2010 Manila Amendments • DG Shipping E-Learning & Exit Exam Standards • Advanced Fire Fighting (AFF).
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