'AWWA ABC Water Distribution Grades 1 and 2 Practice Exam 2025 – Comprehensive All-in-One Guide for Exam Success!'

The type of valve predominantly used for managing flow in piping systems is the throttling valve. Throttling valves are specifically designed to regulate flow rates by adjusting the size of the flow path. This capability allows operators to control the amount of fluid passing through the system, enabling precise management of flow for various applications such as maintaining pressure and ensuring optimal system performance.

Throttling valves can be used to reduce flow for specific processes or to balance the flow between multiple branches in a distribution system. Their versatility makes them integral in processes where flow rates need to be adjusted frequently based on operational requirements.

In contrast, other valve types have different primary functions. Isolation valves are primarily used to completely shut off the flow in a system, providing a means to stop flow for maintenance or repairs. Pressure relief valves serve to protect a system from exceeding a predetermined pressure level, releasing fluid when necessary to maintain safety. Check valves, on the other hand, allow flow in one direction only, preventing backflow but not directly managing flow rates.