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Which outcome results when soot accumulates on a heat exchanger in a combustion engine?

A)Reduced thermal efficiency occurs
B)Increased fuel injection rate occurs
C)Enhanced combustion product scrubbing
D)Decreased exhaust valve duration

💡 Explanation

Soot increases thermal resistance inhibiting heat transfer; this causes reduced efficiency by Thermal Insulation, because heat cannot escape as designed, therefore lowering energy output due to insulation, rather than promoting scavenging or precisely altering injection.

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