AFF Exit Exam • Set 7 Question 14 of 30
When dry chemical extinguishers are used to put out Class B fires, there is a danger of reflash because dry chemical:
✓
Direct Answer
Option C: Does little or no cooling
Dry chemical agents are effective at suppressing Class B fires by interrupting the chemical reaction, but they offer minimal cooling. This lack of cooling capability means that the fuel can still vaporize and re-ignite if the heat source persists.
All Options
A
Reacts aggressively with marine steel materials
B
Vaporizes into flammable gas compounds under heat exposure
C
Does little or no cooling
(Correct Answer)
D
Displaces air structures for only a few seconds
Detailed Explanation & Context
Dry chemical agents are effective at suppressing Class B fires by interrupting the chemical reaction, but they offer minimal cooling. This lack of cooling capability means that the fuel can still vaporize and re-ignite if the heat source persists.
Relevant Framework: STCW 2010 Manila Amendments • DG Shipping E-Learning & Exit Exam Standards • Advanced Fire Fighting (AFF).
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