Figure 1.10 shows an automatic water level control system.

(a) Explain how the automatic control system works indicating the roles of key components.

(b) If the automatic water level control system is replaced by a manual control system, draw a diagram representing this new arrangement. Explain how it will work.

(c) State four advantages of closed-loop control systems over open-loop ones.

(d) Explain how this control system works.

(e) If the automatic controller is replaced by manual control, explain how the new system will function.

(f) Construct a feedback control system block diagram and identify the control blocks (sensor, actuator, process, controller, actual output, and desired output) of the new system.

Actuator Process Desired Water Actual Valve Water Tank Water Level Level Float Position Float Sensor Output Sensor Figure 1.10 Block diagram of an automatic water level control system.