Dry chemical extinguishers extinguish Class B fires to the greatest extent by:
Direct Answer
Option A: Breaking the chain reaction
Dry chemical powders interrupt the chemical chain reaction of a fire, effectively stopping the combustion process. While they have some cooling effect, their primary extinguishing mechanism for Class B and C fires is the breaking of the chain reaction.
All Options
Detailed Explanation & Context
Dry chemical powders interrupt the chemical chain reaction of a fire, effectively stopping the combustion process. While they have some cooling effect, their primary extinguishing mechanism for Class B and C fires is the breaking of the chain reaction.
Relevant Framework: STCW 2010 Manila Amendments • DG Shipping E-Learning & Exit Exam Standards • Advanced Fire Fighting (AFF).
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