Which statement about solid streams is true?

Which statement about solid streams is true?

• A. They cool surfaces faster than fog streams
• B. They require more water to be effective
• C. Solid streams have greater penetration power
• D. They cannot reach upper levels

Answer: (C)

Solid streams carry water as a dense, cohesive column with higher velocity, preserving momentum as it travels. That concentrated energy lets the stream penetrate through the flame envelope and push toward the base of the fire or through obstructions, reaching the seat of the fire more effectively than a dispersed pattern. Because the water stays in a solid form, it maintains depth of penetration over distance, which is why this pattern is known for its penetration power. In contrast, fog patterns break the stream into many droplets, increasing surface area and cooling rate but reducing how deeply the water can travel into the flame and through barriers. So the statement that solid streams have greater penetration power is true. The other ideas don't fit: solid streams aren’t inherently faster at cooling surfaces than fog streams; they don’t require more water to be effective and, with proper technique, can reach upper levels rather than being unable to.

Solid streams carry water as a dense, cohesive column with higher velocity, preserving momentum as it travels. That concentrated energy lets the stream penetrate through the flame envelope and push toward the base of the fire or through obstructions, reaching the seat of the fire more effectively than a dispersed pattern. Because the water stays in a solid form, it maintains depth of penetration over distance, which is why this pattern is known for its penetration power. In contrast, fog patterns break the stream into many droplets, increasing surface area and cooling rate but reducing how deeply the water can travel into the flame and through barriers. So the statement that solid streams have greater penetration power is true. The other ideas don't fit: solid streams aren’t inherently faster at cooling surfaces than fog streams; they don’t require more water to be effective and, with proper technique, can reach upper levels rather than being unable to.