Final answer:A potassium bicarbonate portable extinguisher is activated using a nitrogen cartridge. When the PKP extinguisher is activated, the CO2 cartridge releases carbon dioxide gas, which then combined with the potassium bicarbonate to form a cloud of fine powder that extinguishes the fire. so, option b ios the correct answer.Explanation:The type of cartridge that activates a potassium bicarbonate (PKP) portable extinguisher is a b) Nitrogen cartridge. Potassium bicarbonate is often used in dry chemical fire extinguishers, and the pressurizing gas is usually nitrogen, which is a safe and stable gas that doesn't react with the extinguishing agent.The type of cartridge that activates a potassium bicarbonate (PKP) portable extinguisher is a) CO2 cartridge. When the PKP extinguisher is activated, the CO2 cartridge releases carbon dioxide gas, which is then combined with the potassium bicarbonate to form a cloud of fine powder that extinguishes the fire. so, among the above given options, option b ios the correct answer....

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