Refer to the drawing of a water storage tank with differential pressure (D/P) level detection system (see figure below).

The level detector has just been calibrated.
How will the indicated level be affected if condensation partially fills the normally dry reference leg?
A. Indicated level will not be affected.
B. Indicated level will be lower than actual level.
C. Indicated level will be higher than actual level.
D. Indicated level may be higher or lower than actual level depending on the pressure in the upper volume of the tank.
Show Answer
Answer: B
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