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Which prevents high thermal efficiency in combustion engines?

A)Incomplete fuel oxidation reactions
B)Boundary layer laminar sublayer
C)Engine block material changes
D)Rapid flame front propagation

💡 Explanation

Incomplete combustion lowers efficiency because potential energy is transferred to latent heat rather than kinetic; therefore, less usable heat is produced, thus, not all fuel transitions to combustion gases, rather than maximizing total energy release efficiently.

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