Physics · Thermodynamics

How is the thermal efficiency of an internal combustion engine defined?

Verified Solution4 OptionsUpdated: October 2026👁️1 View

1The ratio of useful net work output to the total chemical energy input from the fuel✓
2The ratio of exhaust gas temperature to the intake air temperature
3The ratio of the engine total displacement volume to the fuel mass used
4The ratio of indicated power to frictional power losses

Correct answer

The ratio of useful net work output to the total chemical energy input from the fuel

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