Final answer:
Before using a portable fire extinguisher, check for an intact safety pin, full charge on the pressure gauge and absence of damage. Confirm the correct extinguisher type for the fire and prior knowledge of its usage. Laboratory safety includes proper handling of equipment and awareness of fire safety protocols.
Step-by-step explanation:
Before using a portable fire extinguisher, it is critical to ensure it is in proper working order. You must check that the safety pin is intact and not tampered with, that the pressure gauge shows a full charge and is in the green zone, and that there are no visible signs of damage to the extinguisher. It's also important to confirm that the extinguisher is the right type for the fire you are facing and that you know how to use it based on the instructions provided.
Knowing the location of safety equipment like fire extinguishers and eyewash stations, as well as following safety protocols while working with open flames and flammable chemicals in a laboratory, is crucial. This includes wearing appropriate protective gear, keeping flammable substances away from heat sources, and ensuring your workspace is well ventilated.
Always be vigilant when handling hot equipment or chemicals, ensuring that no flammable materials are nearby and that there are no loose items of clothing or hair that could catch fire. In case of an incident, alert your teacher immediately for assistance and follow any necessary safety procedures.