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← ScienceWhich constraint limits maximum efficiency in heat engines?
A)Carnot's Thermodynamic Efficiency principle✓
B)incomplete fuel complete consumption
C)piston mechanical friction losses
D)spark mistiming causes pre-ignition
💡 Explanation
Carnot's Thermodynamic Efficiency limits ideal heat-engine performance, because it defines maximum efficiency based on temperatures, therefore no real engine exceeds this theoretical limit, rather than losses determine fuel consumption or mechanical conditions. Fuel and spark conditions depend on design not bounds.
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