National Center for Construction Education & Research (NCCER) Plumbing Level 1 Practice Exam

The globe valve is primarily used for throttling or regulating flow in plumbing systems because of its design, which allows for variable flow control. Unlike other types of valves, the globe valve features a spherical body with an internal baffle that creates a flow path for the fluid. This design facilitates precise adjustments to the flow, making it ideal for applications where fine control is necessary.

In scenarios where a system requires more than just an on/off operation, the globe valve's ability to maintain a stable flow, even at varying pressures, is invaluable. This makes it a preferred choice for regulating the flow of fluids in both commercial and residential plumbing systems. Additionally, the construction of the globe valve minimizes turbulence, which further enhances its effectiveness in flow regulation.

In contrast, the ball valve is more suited for on/off applications and gas systems, the gate valve is primarily used for full shut-off (not throttling), and the check valve is designed to prevent backflow rather than regulate flow. Thus, the globe valve stands out as the ideal choice for managing and controlling fluid flow.