If the absolute pressure of a gas is 550.280 kPa, its gauge pressure is A. 448.955 kPa. B. 101.325 kPa. C. 651.605 kPa. D. 277.280 kPa.

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IsrarAwan IsrarAwan · Answer 1 · 2018-10-28T02:59:51+02:00

The correct answer is: Option (A) 448.955 kPa

Explanation:

The formula for the absolute pressure is given as:

Absolute-pressure = Gauge-pressure + Atmospheric-pressure

[tex]P_{abs} = P_g + P_{atm}[/tex]

Now rearrange the above equation to find the gauge pressure:

[tex]P_{g} = P_{abs} - P_{atm}[/tex]

Insert the values:

Absolute pressure = [tex]P_{abs}[/tex] = 550.280 kPa

Atmospheric pressure = [tex]P_{atm}[/tex] = 101.325 kPa

Gauge pressure = [tex]P_{g}[/tex] = ?

[tex]P_{g} = 550.280 - 101.325[/tex]

[tex]P_{g} = 448.955 kPa[/tex]

Hence the correct answer is: Option (A) 448.955 kPa

wiseowl2018 wiseowl2018 · Answer 2 · 2018-10-28T07:13:15+01:00

The correct answer is option A which is 448.955 kPa.

Given data:

absolute pressure of a gas = Pabs = 550.280 kPa

Atmospheric pressure = Patm = 101.325 kPa

Gauge pressure = Pg = ?

Solution:

As we know gauge pressure is difference of Absolute pressure and atmospheric pressure.

Pg = Pabs - Patm

Pg = 550.280 kPa - 101.325 kPa

Pg = 448.955 kPa

Hence the gauge pressure is 448.955 kPa

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