Engineering Board Exam Reviewer · Fluid Mechanics · hard
A U-tube mercury manometer is connected to a water pipe. The mercury column on the open side is 300 mm higher than on the pipe side, and the pipe center is 500 mm above the mercury surface on the pipe side. What is the gauge pressure at the pipe center? (SG Hg = 13.6)
- 44.93 kPa
- 40.02 kPa
- 7.85 kPa
- 35.12 kPa
Answer
D. 35.12 kPa
Solution
PA + w(0.5) = Hg(0.3) PA = 13.6(9.81)(0.3) - 9.81(0.5) = 40.025 - 4.905 = 35.12 kPa.
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