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← ScienceWhich risk increases when fluid exceeds the Reynolds number threshold in a fuel injection system?
A)Increased engine knocking tendency✓
B)Decreased fuel vaporization efficiency
C)Increased boundary layer separation
D)Decreased nozzle clogging probability
💡 Explanation
Increased turbulence intensity enhances fuel-air mixing but it causes engine knocking because the **autoignition** limit is surpassed by greater premixing, therefore increased engine knocking takes place, rather than improved vaporization which might occur with less developed turbulence.
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