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What is the value of pressure ratio if the pressure at point 1 and 2 is 1.809 and 3.467 bar, respectively?

What is the value of pressure ratio if the pressure at point 1 and 2 is 1.809 and 3.467 bar, respectively? Correct Answer 1.916

Pressure ratio is the ratio of pressure after the compression and pressure before the compression. As compression is completed at point 2 from the diagram. So, pressure ratio = P2 / P1 = 3.467 / 1.809 = 1.916. Pressure ratio is the ratio of two same quantities, so this value does not have any unit.

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