🔍 Key Concepts

• Leeward vs. windward – which side is downwind and how smoke/heat travel • Difference between straight stream, high-velocity fog, and low-velocity fog in firefighting • How water spray patterns can provide a protective screen against heat and flames

💭 Think About

• Think about which type of stream or spray will create the widest protective barrier between firefighters and the fire • Consider which option is least likely to push heat, flames, or burning liquids back toward the crew • Ask yourself which pattern is commonly used as a water curtain or shield rather than mainly for extinguishing fuel fires

✅ Before You Answer

• Verify which stream type creates a fine mist or curtain that absorbs heat effectively • Check which pattern is gentler and less likely to spread burning material • Eliminate any option that is mainly used for direct attack on the seat of the fire rather than for shielding personnel