What is a key safety practice when handling compressed gas cylinders for welding?

• A. Secure upright, away from heat, use proper regulators and hoses, check for leaks, and store in ventilated areas.
• B. Keep cylinders loose and near the work area.
• C. Open the cylinder valve fully at all times.
• D. Store in unventilated, confined spaces.

Answer: (D)

Safety with compressed gas cylinders starts with securing them upright and preventing movement. Cylinders should be clamped or chained so they can’t tip over, kept away from heat sources and flames, and connected to regulators and hoses that are appropriate for the gas and in good condition. Always perform a leak check before use, so you can confirm there are no slow leaks in the connections. Storing and handling in a well-ventilated area is essential to prevent gas buildup in case of a leak, which protects you from asphyxiation or fire hazards.

Other practices described are unsafe: keeping cylinders loose near the work area increases the risk of tipping or damage; opening the valve fully at all times can cause uncontrolled gas release; and storing in unventilated, confined spaces can allow dangerous gas accumulation.