On a pressure-enthalpy diagram, vertical lines represent which constant property?

Refrigeration and Air Conditioning MCQs for PPSC, FPSC, NTS, and Pakistan government job tests. Select an option below, then read the explanation.

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Subject
Refrigeration and Air Conditioningmechanical-engineering-mcqs › refrigeration-and-air-conditioning
Published
25 Jan 2019
Last updated
28 May 2026

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Explanation

In a pressure-enthalpy chart, vertical lines indicate constant total heat values, as enthalpy changes vertically correspond to heat transfer in the system.

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