Recharging a previously used cartridge-operated dry chemical fire extinguisher is accomplished by
Direct Answer
Option D: Replacing the propellant cartridge and refilling it with powder
For cartridge-operated extinguishers, the propellant charge (cartridge) and the fire-extinguishing powder are stored separately. After discharge, the cartridge must be replaced and the vessel must be refilled with the specified amount of powder to ensure it functions correctly.
All Options
Detailed Explanation & Context
For cartridge-operated extinguishers, the propellant charge (cartridge) and the fire-extinguishing powder are stored separately. After discharge, the cartridge must be replaced and the vessel must be refilled with the specified amount of powder to ensure it functions correctly.
Relevant Framework: STCW 2010 Manila Amendments • DG Shipping E-Learning & Exit Exam Standards • Refresher Course for STCW Modular Courses (Refresher).
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