What device provides a master valve, water meter and flow sensor in a single unit for high-pressure remote applications?

• A. Three-way valve
• B. Manual valve
• C. Hydrometer valve
• D. Pneumatic valve

Answer: (C)

The main idea tested here is the use of a single, integrated remote irrigation unit that combines control, metering, and flow monitoring for high‑pressure installations. This type of device is designed to shut the water off remotely (master valve), measure how much water passes through (water meter), and continuously monitor the rate of flow (flow sensor—all in one rugged unit). Having these three functions in one enclosure simplifies installation, reduces leak points, and provides immediate data for管理 and diagnostics, which is especially important in remote, high‑pressure systems where accessibility is limited. The master valve offers reliable remote control, the water meter gives usage data for budgeting and conservation, and the flow sensor detects anomalies such as leaks or blockages in real time. The other options don’t fit because a three‑way valve only diverts flow without metering or sensing, a manual valve provides no metering or flow sensing, and a pneumatic valve is an actuation method that still lacks an integrated water meter and flow sensor.