Which three warning signs are displayed on a cylindrical store?

• A. Flammable, No Smoking, No Naked Flame
• B. No Smoking, No Naked Flame
• C. Flammable
• D. Flammable, No Smoking

Answer: (A)

When storing flammable materials in a cylinder, warnings are all about preventing ignition. The best set of signs to put on a cylindrical store includes three clear cautions: Flammable, No Smoking, and No Naked Flame. “Flammable” communicates that the substance can ignite easily. “No Smoking” removes a common ignition source nearby, and “No Naked Flame” forbids any open flame or spark that could ignite vapors. Together, these signs cover the main ways ignition could occur and keep people aware of the fire risk from multiple angles. If any one of these is missing, the message isn’t as strong: without "No Naked Flame" someone might not realize an open flame is prohibited; without "No Smoking" the danger from smoking near vapors isn’t directly addressed; without "Flammable" the basic nature of the risk might be overlooked.