Ontario Operator-in-Training (OIT) Practice Exam

What role do globe valves serve within the water distribution system?

1. Only to close the pipe

2. To completely stop fluid flow

3. To adjust and control fluid flow

4. Only to relieve pressure

The correct answer is: To adjust and control fluid flow

Globe valves are specifically designed to regulate fluid flow within a water distribution system. Their primary function is to provide fine control over the flow rate, making them ideal for processes that require precise adjustments. The unique disc and seat design of globe valves allows for significant throttling capabilities, enabling operators to modulate flow depending on system demands. This ability to adjust flow contrasts with other valve types that may be more suited for simply opening or closing pipes completely or relieving pressure. While globe valves can indeed stop fluid flow when fully closed, their true purpose is not solely to stop flow but rather to manage and control it effectively. This makes them essential for maintaining the desired operational conditions in a variety of applications within the water distribution system.