Which problem can be caused by cylinders not properly purged of air or moisture?

• A. Corrosion of the cylinder valve
• B. Fading of the odorant in the cylinder
• C. Increased shelf life
• D. Chipped paint on the cylinder

Answer: (B)

When a cylinder isn’t purged of air or moisture, that air can dilute or interact with the odorant that’s added to propane. The odorant is what lets you smell leaks, so if its concentration is reduced, the smell can fade or disappear. That makes leaks harder to detect and creates a serious safety risk. Moisture can contribute to this by washing out or sequestering odorant, further reducing its effectiveness. While moisture can cause other issues like corrosion, the effect most directly tied to not purging is fading of the odorant, which is why this choice is the best answer.