What should you never do when dealing with a pressurized gas cylinder?

Answer: B — Drop or roll the cylinder

When dealing with a pressurized gas cylinder, it is crucial to avoid dropping or rolling the cylinder. This is because pressurized gas cylinders are designed to contain gases at high pressures; any sudden impact can compromise their structural integrity. Dropping a cylinder can cause dents or breaches in the casing, which may lead to leaks or even catastrophic failures, such as an explosion or uncontrolled release of gas. Additionally, rolling a cylinder can cause it to become unstable and unpredictable, increasing the risk of it tipping over or causing injury to nearby personnel. Safe handling practices include securing cylinders in an upright position to prevent movement and damage, inspecting them for leaks to ensure safety, and storing them in controlled environments to mitigate risks. These practices are essential for maintaining safety standards in environments where pressurized gases are handled.