Refer to the drawing of a water storage tank with a level control system (see figure below).
The tank water level is being automatically controlled by a proportional-only controller with a level setpoint of 50 percent.
Tank water level is currently stable at 50 percent with 500 gpm entering the tank and the drain valve 50 percent open.
If the tank input flow rate suddenly increases to 700 gpm, then after the tank water level stabilizes, the water level will be __________ 50 percent; and the drain valve position will be __________ open.
A. equal to; more than 50 percent
B. equal to; 50 percent
C. greater than; more than 50 percent
D. greater than; 50 percent
Show Answer
Answer: C
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