Refer to the drawing of a water storage tank with a differential pressure (D/P) level detector (see figure below).
The level detector is being used in a level control system that was calibrated to maintain tank level at 80 percent at the current water temperature of 100°F.
If the water temperature gradually decreases and stabilizes at 70°F, the level control system will cause actual tank level to…
A. remain at 80 percent.
B. increase and stabilize above 80 percent.
C. oscillate around 80 percent.
D. decrease and stabilize below 80 percent.
Show Answer
Answer: D
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