Refer to the drawing of a water storage tank with a differential pressure (D/P) level detection system. The D/P level detector was just calibrated and returned to operation with the following conditions ___

Multiple Choice Questions Instrumentation MCQ
1

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

Water Storage Tank-PG-51

The D/P level detector was just calibrated and returned to operation with the following conditions:

  1. The reference leg contains 20 feet of water at 70°F.
  2. The tank contains 18 feet of water at 70°F.
  3. Tank level indication is 18 feet.

Assume the actual tank water level and the temperature of the water in the tank and reference leg do not change.

Which one of the following will be the new tank level indication if the reference leg water level decreases to 18 feet?

A. 22 feet
B. 20 feet
C. 18 feet
D. 2 feet

Show Answer

Answer: B

Share your understanding of this question with the correct explanation.