🔍 Key Concepts

• Compare cooling, smothering, and vapor control effects of common agents (water fog, foam, dry chemical, CO₂) • How water fog actually fights fire: tiny droplets, surface area, and steam production • Limitations of water fog against toxic fumes and combustible vapors—what it can and cannot "completely" remove

💭 Think About

• Ask yourself: what is the primary strength of water (especially as fog) in firefighting compared to foam, CO₂, or dry chemical? • Which agent is specifically designed to form a blanket over fuel surfaces to control vapors—water fog or foam? • Do any normal firefighting agents truly completely remove toxic fumes or combustible vapors from the air, or do they mainly control the fire itself?

✅ Before You Answer

• Be skeptical of choices that claim "completely remove" something from the air—verify if that is realistic for shipboard firefighting agents. • Recall that foam is the main agent known for forming a vapor-sealing blanket on flammable liquids; compare that to what water fog does. • Focus on which effect of water fog is emphasized in marine firefighting training: cooling, smothering with steam, or vapor/foam production.