🔍 Key Concepts

• Class B fires and what types of fuel they involve • How different extinguishing agents (CO₂, dry chemical, Halon) work on flammable liquid and grease fires • Special concerns with galley duct work (confined space, possibility of reflash, ventilation paths)

💭 Think About

• For each agent listed, ask yourself: Is it approved and commonly used for flammable liquid/grease fires and in ducts/hood systems? • Think about which agents remove oxygen, which interrupt the chemical chain reaction, and which leave a residue. How does that matter inside ventilation ducting? • Consider whether there is any safety or effectiveness limitation that would make one of these agents clearly unsuitable for galley duct work.

✅ Before You Answer

• Verify what fuels are in a Class B fire (not just any kitchen fire). • Check which agents are recognized for flammable liquid/grease and machinery space fires in marine service (CO₂ fixed systems, dry chem, Halon/clean agents). • Make sure the option you pick does not unnecessarily exclude any agent that is actually suitable for Class B duct fires.