The pressure difference between two vessels containing are is toe be measured. A

Question

The pressure difference between two vessels containing are is toe be measured. A 12 in, tall is available, and the maximum pressure difference between the two vessels in 2.5 psi, Methyl alcohol, water, and mercury are available as manometer liquids. Are any of them suitable? The pressure of the air in Figure P2.38 is 10.7 kPa, and the manometer fluid is of unknown specific gravity s. Determine s for the deflections shown. FIGURE P2.38 For the sketch of Figure P2.39 (all dimension in inches), determine the pressure of the linseed oil if the glycerine pressure is 150 psig. FIGURE P2.39 Find z in Figure P2.40 if p2 - p1 = 3.0 psi g.

Explanation / Answer

Starting from point 1 and adding all the pressure in downward direction and subtracting in upward direction:

P1 + glyciryn .g. 9 - mercury .g.8 + water . g. 12 - linseed .g.9 = P6

P1 = 150 psig

here density of glycrine, mercury and water is not given. Pls put their proper values in the equation to get P6

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