A brine supply line is equipped with an open-end manometer. The manometer is fil

Question

A brine supply line is equipped with an open-end manometer. The manometer is filled with mercury (Liquid A), which has a specific gravity of 13.59. The brine solution (Liquid B) flows through supply line and fills the manometer leads. The brine solution has a specific gravity of 1.26. Under operating conditions, the gauge pressure at point 2 is under 100 mmHg of vacuum. The upper level of mercury in the manometer lies 0.2m below the pipe tap. A nearby barometer reports that the pressure is 1 atm. If the pressure at point 2 is accurate, what would the height displacement in mercury level (h) be in millimeters? A useful conversion might be 1 Pa = 1 kg / m*s2. Take the average density of the air to be 1.29 kg/m3.

Explanation / Answer

1 atm = 1.01325*10^5 Pa. = 1.01325*10^5 kg/m*S2 = 0.2*1.26*1000*9.81 + h*13.59*1000*9.81. so, h = 0.7415 m = 741.5 mm

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