The term 'outside stem & yoke valve' describes a valve with what feature?

• A. Stem protrudes from the housing when the valve is shut
• B. Valve handle color-coded
• C. Valve with a visible packing gland
• D. Valve mounted externally

Answer: (A)

Outside stem and yoke valves are defined by having the stem and yoke on the exterior of the valve, so you can see and access the stem from outside the housing. This design allows the stem to protrude from the valve housing, and in many cases it clearly sticks out when the valve is shut. That visible protrusion provides an immediate visual indication of the valve position and accommodates external operation. The other details—colored handles, a packing gland being visible, or the valve being mounted externally—aren’t the defining feature of this valve style, whereas the protruding stem is.