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