Why must you not obstruct the nozzle of a Type B extinguisher?

Obstructing the nozzle of a Type B extinguisher can lead to a malfunction or improper release of the extinguishing agent. The nozzle is designed to direct the flow of the extinguishing agent effectively towards the fire, ensuring maximum impact and efficiency. When the nozzle is obstructed, it can either restrict the flow or change the direction of the agent being released, which hinders its effectiveness in suppressing the fire. This can result in the fire continuing to burn, potentially causing more damage and increasing the risk to safety. Understanding the importance of keeping the nozzle clear emphasizes the correct operation of fire extinguishers and highlights the necessity of using them as intended for optimal firefighting performance.