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Definition of volumetric efficiency for reciprocating engines: choose the correct ratio. Identify the ratio defined as “volume of charge admitted at NTP divided by the swept volume of the piston.”

Difficulty: Easy

Mechanical efficiency
Overall efficiency
Volumetric efficiency
Relative efficiency

Correct Answer: Volumetric efficiency

Explanation:

GivenRatio: (Volume of charge at NTP) / (Swept volume).

ConceptThat ratio quantifies how effectively the cylinder is filled compared to its displacement and is called volumetric efficiency.

Final AnswerVolumetric efficiency.

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