Full or empty containers can be stored indoors?

• A. always
• B. never
• C. sometimes
• D. rarely

Answer: (B)

Propane cylinders hold flammable gas under pressure, and a leak in an enclosed space can quickly create a dangerous, explosive atmosphere. Propane is heavier than air, so it tends to settle in low spots and corners of a building, making indoor areas particularly risky. Even when a cylinder is empty, residual gas can still vent or be released during handling, so indoor storage remains hazardous. For safety, keep both full and empty cylinders outdoors in a well-ventilated area, away from heat, flames, sparks, and direct sunlight, and secure them so they can’t tip. This outdoor-only storage rule reduces the chance of gas buildup inside a building and helps prevent fires or explosions.