Refer to the drawing of a flow control valve (see figure below) located in the makeup water supply line to a water storage tank.
The flow control valve is positioned by a tank level controller that can maintain a stable water level anywhere between 10 percent above and 10 percent below the controller setpoint.
The tank level controller receives input from a direct-acting tank level detector.
Which one of the following describes the characteristics of the tank level controller?
A. Direct-acting with proportional only control.
B. Direct-acting with proportional-integral control.
C. Reverse-acting with proportional only control.
D. Reverse-acting with proportional-integral control.
Show Answer
Answer: A
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