Which statement about solid streams is correct?

Which statement about solid streams is correct?

• A. They extinguish faster than fog streams
• B. They produce less heat
• C. They have greater penetration power
• D. They are less effective at reaching upper floors

Answer: (C)

Solid streams deliver a concentrated, high-velocity column of water. That focused jet maintains its shape and momentum over distance, which lets it punch through obstacles like doors, ceilings, and lightweight barriers and deliver water directly to the fire. This penetration capability means you can reach the seat of the fire even when it’s behind obstructions or on upper floors, making the stream more effective at getting water where it’s most needed. Fog streams break the water into many droplets and are excellent for cooling surfaces and protecting exposures, but they lose momentum and penetrating power, so they don’t reach concealed or distant portions of the fire as reliably. So the statement that solid streams have greater penetration power is the best description of their behavior.

Solid streams deliver a concentrated, high-velocity column of water. That focused jet maintains its shape and momentum over distance, which lets it punch through obstacles like doors, ceilings, and lightweight barriers and deliver water directly to the fire. This penetration capability means you can reach the seat of the fire even when it’s behind obstructions or on upper floors, making the stream more effective at getting water where it’s most needed. Fog streams break the water into many droplets and are excellent for cooling surfaces and protecting exposures, but they lose momentum and penetrating power, so they don’t reach concealed or distant portions of the fire as reliably. So the statement that solid streams have greater penetration power is the best description of their behavior.