In a cartridge-operated dry chemical type fire extinguisher, when the CO2 cartridge is activated, the dry chemical is released from the extinguisher __________.

Correct Answer: Option A — with the squeeze-grip on/off nozzle at the end of the hose

Cartridge-operated dry chemical extinguishers utilize a separate CO2 cartridge to pressurize the main agent cylinder. Once the cartridge is punctured, the dry chemical is held under pressure within the shell, and the discharge is controlled by the squeeze-grip nozzle at the end of the hose, allowing for intermittent operation.