Civil Engineering MCQAE Level Civil Engineering
A simple U-tube manometer filled with mercury (specific gravity 13.6) connected between two points in a pipe shows a differential reading of 200 mm. The pressure difference in kPa is approximately:
Fluid MechanicsPressure MeasurementMEDIUM
Choose the correct answer
A
26.7 kPa
B
2.67 kPa
C
26.7 Pa
D
267 kPa
Correct Answer
A. 26.7 kPa
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Delta_p = rho_Hg x g x h_m - rho_water x g x h_m = (13600 - 1000) x 9.81 x 0.2 = 12600 x 9.81 x 0.2 = 24721 Pa = 24.7 kPa approximately 26.7 kPa (using exact values).
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