If a gas has a gauge pressure of 156 kPa, its absolute pressure is approximately:

A. 256 kPa
B. 300 kPa
C. 100 kPa
D. 56 kPa

Question

College

Answer :

VTDK248 VTDK248 · Answer 1 · 2025-05-14T04:38:58-04:00

The absolute pressure is 256kPa. So, the correct option is A.

Gauge pressure is defined as the amount by which the measured pressure in a fluid exceeds atmospheric pressure which is expressed as

[tex]p_g=p- p_o[/tex]

Where,

[tex]p_g[/tex] is gauge pressure

p is absolute pressure

[tex]p_o[/tex] is atmospheric pressure

Barometric pressure is called as the atmospheric pressure is defined as the force exerted by the atmosphere at a given point.

For above given example,

gauge pressure= 156kPa

Gauge pressure (GP) will be 0 at atmospheric pressure (AP), so the absolute pressure= GP + AP.

Since atmospheric pressure is 100 kpa

Absolute pressure= 100 + 156 = 256 kpa.

Thus, the absolute pressure is 256kPa. So, the correct option is A.

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