A compressor is operating at an inlet...

Question 1 of 2707066636eed28f7522a1c51def6

A compressor is operating at an inlet pressure of 14.7 (atmospheric pressure at the time of measurement) and a compressor discharge pressure of 123 psig. Calculate the absolute pressure ratio across the compressor.

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Question 1 of 27070

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🔍 Key Concepts

• Difference between psig (gauge pressure) and psia (absolute pressure) • How to convert gauge pressure to absolute pressure using local atmospheric pressure • Formula for pressure ratio across a compressor

💭 Think About

• What must you do to the 123 psig discharge pressure before comparing it to the 14.7 psi atmospheric pressure? • Once both inlet and discharge pressures are on the same absolute scale, how do you form the ratio? • Are you using the correct inlet pressure value in absolute terms, or accidentally mixing gauge and absolute units?

✅ Before You Answer

• Be sure the discharge pressure is converted from psig to psia before forming the ratio • Confirm the inlet pressure is already absolute (since it is given as atmospheric) and not gauge • After computing the ratio, compare your numerical result carefully to the closest listed choice without rounding too early