Refer to the drawing of a water storage tank with a differential pressure (D/P) level detection system (see figure below).
Which one of the following failures will cause the lowest stable water level indication? (Assume no operator action and no tank makeup.)
A. The tank level sensing line ruptures at the detector.
B. The reference leg ruptures at the detector.
C. The gas or vapor space ruptures.
D. The D/P cell diaphragm ruptures.
Show Answer
Answer: A
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