Page 23 - ebook fluid mechanics_finalize

FLUID MECHANICS

Exercise

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1. Pressure by a Barometer is 500kN/m . Find the pressure in the expression for the
head, h if the fluid in the barometer is:

i). Water

ii). Mercury

iii). Oil with relative density, S = 0.9

Ans: 50.96 m of water, 3.75 m of mercury and 56.63 m of oil

2. A Bourdon pressure gauge attached to a boiler located at sea level shows a reading
pressure 10 bar. If atmospheric pressure is 1.01 bar, express:

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i). The absolute pressure in kN/m

2
ii). The pressure head of water, h Ans : 1101kN/m , 101.94 meter

3. A pressure gauge is attached to a reservoir containing water which shows value of

2
20kN/m . Express:
i). The pressure head of water, h

2
ii). The absolute pressure in bar if the atmospheric pressure is 101.3kN/m .
Ans : 2.04 meter, 1.213bar

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