🔍 Key Concepts

• Class B fires involve flammable liquids and fuels (oil, gasoline, solvents). • Certain extinguishing agents are preferred for Class B (foam, dry chemical powder, CO₂, Halon), while plain water hose lines are not suitable. • On the fire control plan, letters such as P, F, CO₂, D next to the symbols indicate the type of extinguishing agent.

💭 Think About

• Look closely at symbols 16, 26, 36, and 47 and first decide what kind of extinguisher or system each one represents (foam, powder, CO₂, water, etc.). • Compare those symbols with the row of extinguisher types shown in symbol 57 to decode what each letter and shape stands for. • Once you know the agent for each symbol, ask: which of these agents is recommended for flammable liquid fires and which are mainly for ordinary combustibles or special-metal fires?

✅ Before You Answer

• Verify which of the four symbols show CO₂ or dry chemical/foam agents, not plain water hose or spray systems. • Double‑check the meaning of the letters P and F in this diagram using the combined extinguisher legend at symbol 57. • Eliminate any symbol whose agent would be unsafe or ineffective on fuel and oil fires (for example, straight water on burning fuel).