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← ScienceWhich phenomenon limits peak efficiency in an Otto cycle engine?
A)Non-isentropic compression causes irreversibility✓
B)Increased heat capacity at high temperatures
C)Fuel auto-ignition at increased pressure
D)Viscosity losses compromise peak pressures
💡 Explanation
The limitation arises because non-isentropic compression involves entropy increases arising from friction and heat transfer resulting in irreversibility, thereby reducing cycle efficiency; therefore, peak brake thermal efficiency will be reduced rather than losses due to other thermal or frictional means.
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