Final answer:
The firefighter should visually inspect the extinguisher after selecting the appropriate one for the fire, and ensure all other safety equipment is in place and well understood. Therefor correct option is a. visually inspect the extinguisher.
Step-by-step explanation:
After selecting the appropriate extinguisher to use on a fire, the firefighter should visually inspect the extinguisher to ensure it is in working order before attempting to extinguish the fire.
It is also important to be aware of the location and proper use of safety equipment, such as having fire safety equipment readily available and accessible. Additionally, when in a lab setting, it is vital to follow instructions carefully regarding the handling of flammable chemicals, use of open flames, and what to do in case of an emergency.
After selecting the appropriate extinguisher to use on a fire, the firefighter should:
Visually inspect the extinguisher to ensure it is in good working condition and not damaged or expired.
Aim the nozzle at the base of the fire to effectively extinguish the flames.
Squeeze the handles and release the agent on the fire to discharge the extinguishing agent onto the fire.
Therefor correct option is a. visually inspect the extinguisher.