Class B fires involve
Direct Answer
Option B: Vapour/air mixture over the surface of flammable liquids
Class B fires, as defined by international fire classification standards (e.g., SOLAS, FSS Code), involve flammable liquids or liquefiable solids. The actual combustion occurs in the vapour/air mixture above the liquid surface, not the liquid itself. This distinction is critical for effective firefighting.
All Options
Detailed Explanation & Context
Class B fires, as defined by international fire classification standards (e.g., SOLAS, FSS Code), involve flammable liquids or liquefiable solids. The actual combustion occurs in the vapour/air mixture above the liquid surface, not the liquid itself. This distinction is critical for effective firefighting.
Relevant Framework: STCW 2010 Manila Amendments • DG Shipping E-Learning & Exit Exam Standards • Advanced Training for Chemical Tanker Cargo Operations (CHEMCO).
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