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← ScienceWhich outcome occurs when back pressure limits diesel engine performance?
A)Decreased burn and efficiency✓
B)Increased scavenging effectiveness promptly improves
C)Augmented forced induction dramatically fails
D)Elevated compression avoids knocking entirely
💡 Explanation
Combustion efficiency degrades because increased back pressure hampers proper exhaust _scavenging_. This increases residuals and inhibits fresh air intake therefore decreasing burn efficiency rather than assisting scavenging or improving compression since combustion worsens.
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