What three warning signs must be displayed in the cylinder stores?

• A. No Smoking; No Entry; No Open Flames
• B. Flammable; Keep Away From Heat; Do Not Touch
• C. No Smoking; Compressed Gas; No Naked Flames
• D. Handle With Care; Wear PPE; Keep Closed

Answer: (C)

The key idea is recognizing the two main hazards in a cylinder store: ignition sources and the presence of gas under pressure. The three warning signs you need are No Smoking, No Naked Flames, and Compressed Gas. No Smoking and No Naked Flames specifically prevent any flame or heat source near the cylinders, which is crucial because many gases stored as cylinders can fuel fires or react violently if heated or ignited. The sign Compressed Gas warns that the cylinders contain gas at high pressure, a hazard in itself that calls for secure storage, proper handling equipment, ventilation, and protective measures to prevent rapid releases or cylinder rupture.

Other signs like general “No Entry” or PPE reminders don’t address the core risks unique to cylinder storage, such as ignition sources around flammable or oxidizing gases and the dangers of pressurized contents, so they aren’t the standard trio used here.