NEBOSH Practice Test

Which fire protection system can be used effectively on floating roof tanks?

1. Deluge water systems

2. Fixed foam systems

3. Gas detection systems

4. Sprinkler systems

The correct answer is: Fixed foam systems

Floating roof tanks are designed to store volatile liquids, and they can be particularly prone to issues such as vapor release that can lead to fire hazards. A fixed foam system is specifically effective for this type of storage because it can provide a blanket of foam on the surface of the liquid. This foam not only suppresses the vapors but also smothers potential fires, thereby preventing ignition. The unique design of floating roof tanks allows the roof to rise and fall with the liquid levels, which means that during handling or storage operations, there can be a significant amount of vapor generated. By using foam that adheres to the surface of the liquid, a fixed foam system limits the amount of vapor that escapes and reduces the risk of ignition. The effectiveness of this system is further enhanced in preventing fires that can happen due to leaking vapors. Other fire protection systems, while useful in different contexts, may not offer the same level of effectiveness in this specific scenario. Deluge water systems, for instance, are better suited for cooling structures and providing rapid suppression on solid surfaces rather than managing fluid surfaces effectively. Gas detection systems, while crucial for detecting potential hazards, do not provide direct fire suppression. Sprinkler systems generally rely on water, which may not be effective in