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← ScienceWhich 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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