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∆
∆ . Discussion: The height will move down by 2.55m since the pressure is inside the air
space. Problem: For the closed tank with Bourdontube gages tapped into it, what is the specific
gravity of the oil and the pressure reading on gage C?
Given: (a) From Table A.5 for water at 10°C, = 9810 N/m3
Equations and Assumptions:
(1)
(hydrostatic equation)
(hydrostatic equation) (2)
(3)
Solution: Determining the specific gravity of the oil:
Since air has a negligible density change, the pressure at the surface of oil from the air is
equal to the pressure at A. 1000 58.53 50 1000 1.0 8530
8530
9810 . Gage Pressure at C 58.53 1000 8530 0.5 9810 1.0 . Discussion: The SG is less than 1 indicating that the oil will float upon the water. The
pressure is higher as the depth increases. Both answers make sense....
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This document was uploaded on 04/11/2014.
 Fall '14

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