Multiple choice

A U-tube manometer with a small quantity of mercury is used to measure the static pressure difference between two locations A and B in a conical section through which an incompressible fluid flows. At a particular flow rate, the mercury column appears as shown in the figure. The density of mercury is 13600 kg/m3 and g = 9.81 m/s2. Which of the following is correct?

  1. Flow direction is A to B and pA - pB = 20 kPa

  2. Flow direction is B to A and pA - pB = 1.4 kPa

  3. Flow direction is A to B and pB - pA = 20 kPa

  4. Flow direction is B to A and pB - pA = 1.4 kPa
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A Correct answer
Explanation

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