In a ton cylinder, which valve provides access to the gas at the top?

• A. Bottom valve
• B. Middle valve
• C. Top valve
• D. Pressure relief valve

Answer: (C)

Access to the gas in a ton cylinder is provided by the valve at the very top because that is the designated outlet that connects to regulators and hoses. The top valve is built to open and close to control flow and to handle the high pressure inside the cylinder. Other valves, if present, are not used for normal gas withdrawal—the pressure relief device is a safety feature that vents only to prevent overpressure, not for regular use. So, the top valve is the one that provides access to the gas.