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Compressor definitions: identify the correct efficiency term. Definition target: the ratio of free air delivery (at standard condition) per stroke to the piston's swept volume. Select the correct name of this ratio.

Difficulty: Easy

Correct Answer: volumetric efficiency

Explanation:

Given
Ratio = (Free air delivered per stroke at NTP)/(Swept volume of piston).


Concept
This ratio measures how effectively the cylinder volume is filled with air referenced to standard conditions; the standard term is volumetric efficiency.


Final Answer
volumetric efficiency.

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