After a fire has been extinguished in a closed space, personnel may safely enter the space when:
Direct Answer
Option D: All smoke and toxic fumes are removed and an adequate oxygen supply is present
Personnel may safely enter a compartment after a fire only after thorough mechanical ventilation has removed all combustion gases and atmospheric testing confirms normal oxygen content (20.9%) and zero toxic gas concentrations.
All Options
Detailed Explanation & Context
Personnel may safely enter a compartment after a fire only after thorough mechanical ventilation has removed all combustion gases and atmospheric testing confirms normal oxygen content (20.9%) and zero toxic gas concentrations.
Relevant Framework: STCW 2010 Manila Amendments • DG Shipping E-Learning & Exit Exam Standards • Fire Prevention & Fire Fighting (FPFF).
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