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Perfect (complete) intercooling criterion in two-stage air compression: identify the temperature condition. Condition to classify perfect intercooling: Temperature of air leaving the intercooler is ________ the original atmospheric (inlet) air temperature. Choose the correct relation.

Difficulty: Easy

Equal to
Higher than by a fixed margin
Lower than by a fixed margin
Unrelated to

Correct Answer: Equal to

Explanation:

Concept/Approach
Perfect (complete) intercooling brings the air temperature between stages back to the initial inlet (atmospheric) temperature, minimizing total compression work for given pressure ratio.

Result
T_{after intercooler} = T_{atmospheric inlet}.

Final Answer
Equal to.

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