The quantity of burning fuel that a fire extinguisher can extinguish determines:

• A. the size of the extinguisher
• B. travel distance to the extinguisher
• C. its extinguishing agent
• D. the placement of the extinguisher

Answer: (A)

An extinguisher’s ability to tackle a fire is defined by how much extinguishing agent it contains. That quantity directly sets its size and weight—more agent means a bigger, heavier unit because it has to hold more material. Travel distance to the extinguisher, the type of extinguishing agent, and where the extinguisher is placed relate to access, fire class needs, and layout, not to how much fuel the unit can extinguish. So the amount of burning fuel it can extinguish determines the extinguisher’s size.