The H2O fire extinguisher is effective on which types of fires?

The H2O fire extinguisher is designed to be effective on Class A fires, which involve ordinary combustible materials such as wood, paper, and textiles. The choice indicating Class A and PED (Portable Electronic Device) batteries aligns with the use of water extinguishers, as they can sometimes be safely used on lithium-ion battery fires, provided the risk of re-ignition is managed and appropriate precautions are taken.

In scenarios involving PED batteries, the general knowledge surrounding fire extinguishers suggests that if a device is merely overheating or beginning to catch fire, the application of water may help cool the burning material. However, it is crucial to note that H2O extinguishers should not be used on Class B (flammable liquids) or Class C (electrical) fires, which can lead to dangerous situations such as spreading the fire or electrical shock.

By contrast, options that mention Class B and C fires or electrical fires only are inaccurate, as these fires require different types of extinguishers that are specifically formulated for managing flammable liquids and electrical risks, respectively. Class D fires involve combustible metals and require specialized extinguishing agents, further affirming that water is ineffective for those types. Thus, the choice highlighting Class A and PED batteries