STCW Basic Firefighting Practice Exam

When electrical equipment is on fire, the safest and most effective action is to disconnect the power source if it can be done safely. This is crucial because water should never be used on electrical fires, as it can conduct electricity and potentially lead to electrocution or spread the fire further. Additionally, simply allowing the equipment to burn out without addressing the source is highly dangerous, as it can escalate the situation.

Using a fire blanket to smother an electrical fire could be inadequate if the blanket is not rated for electrical fires, and it does not address the underlying issue of the electricity itself, which is still live. Disconnecting the power source removes the source of ignition and helps to mitigate the fire's potential to spread, making it a key step in fire safety and response in such scenarios.