When containers of flammable gases are exposed to flame impingement, water should be applied to cool the:

• A. Top of the Tanks.
• B. Relief Valves.
• C. Ends of the Tanks.
• D. Sides of the Tanks.

Answer: (A)

When a container of flammable gas is in flame, cooling it with water aims to slow heat rise and prevent a hazardous release. The part to focus cooling on is the top of the tank because that’s where the valve, neck, and any relief devices sit. If the valve area overheats, gas can be released or the valve can fail, creating a much bigger danger. Water applied to the top absorbs heat most effectively where it matters most, protecting the valve and reducing the likelihood of a dangerous rupture. Cooling the sides or ends is helpful too, but the top is the priority because it directly guards the containment and release mechanisms.