Which valve is described as a cork-like plug used to block flow?

• A. Plug valve
• B. Needle valve
• C. Ball valve
• D. Globe valve

Answer: (A)

The idea here is a valve that uses a cork-like plug to block the flow. A plug valve achieves this by having a cylindrical or tapered plug that fits into a matching seat inside the valve body. When you rotate the plug, the bore either aligns with the flow path to allow passage or is blocked by the seat to stop flow, giving a simple on/off control. The plug acts like a cork, sealing against the seat to prevent leakage.

This description doesn’t fit the other valve types as naturally. A needle valve relies on a long, slender needle for fine throttling and precise control, not a cork-like plug. A ball valve uses a spherical ball with a bore that turns to open or close. A globe valve uses a movable disk that slides against a seat to regulate flow, which is more for throttling than a cork-like sealing plug. So the cork-like plug description best matches the plug valve.