Which type of control system allows for adjustments based on varying water pressure?

• A. Batch control
• B. Start-stop control
• C. Feedback control
• D. Direct control

Answer: (C)

Feedback control systems are designed to monitor the output and make adjustments based on the difference between the desired setpoint and the actual condition. In the context of water treatment, this means that if the water pressure deviates from a predetermined level, the feedback control system detects this change and automatically adjusts the input or operational parameters to bring the water pressure back into the desired range.

This type of system is essential for maintaining optimal conditions within the treatment process, as it enables continuous monitoring and dynamic adjustments in response to real-time data. For instance, if the water pressure drops due to an increase in demand, the feedback control can respond by increasing pump speed or adjusting valves to restore pressure levels.

In a water treatment scenario, maintaining adequate pressure is crucial for effective operation of filtration systems, disinfection processes, and overall system reliability. Feedback control systems thus enhance efficiency and ensure consistent water quality by actively responding to changes in system dynamics.