High School

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If the absolute pressure of a gas is 550.280 kPa, its gauge pressure is:

A. 101.325 kPa
B. 651.605 kPa
C. 277.280 kPa
D. 448.955 kPa

Answer :

The answer is D. 448.955 kPa

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Rewritten by : Barada

By definition we have to:


[tex] Pabs = Patm + Pg
[/tex]

Where,

Pabs: absolute pressure

Patm: atmospheric pressure

Pg: gage pressure

The atmospheric pressure is constant and its value is:


[tex] Patm = 101.325 kPa
[/tex]

Then, by clearing gage pressure we have:


[tex] Pg = Pabs - Patm
[/tex]

Substituting values we have:

[tex] Pg = 550.280 - 101.325

Pg = 448.955 KPa
[/tex]

Answer:

If the absolute pressure of a gas is 550.280 kPa, its gage pressure is:

D. 448.955 kPa