Oilers/Plant Tenders (HHC) Civil Service Practice Exam

Where are globe and angle valves typically installed in a system?

1. In areas with minimal operation

2. Where frequent operation and tight closure are required

3. In low-pressure systems only

4. Only in drainage systems

The correct answer is: Where frequent operation and tight closure are required

Globe and angle valves are specifically designed for controlling the flow of fluids in a system. They are ideally installed in locations where frequent operation is necessary and where tight closure is required. The design of globe and angle valves allows for precise regulation of flow, which is essential in applications where fine adjustments are critical. This capability makes them suitable for service lines, throttle applications, and systems where leakage must be minimized when the valve is closed. In contrast, areas with minimal operation would not benefit from the unique features of these valves, as there would be less need for precise flow control. Likewise, limiting their use to low-pressure systems does not reflect their versatility, as they can function effectively across a range of pressures. Finally, while they can be used in drainage systems, that is not their sole requirement; they are beneficial in various applications beyond just drainage. Thus, the key factor in the installation of globe and angle valves is their capacity for frequent operation and maintaining tight seals, which aligns directly with the provided answer.