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Which outcome occurs when fuel injector nozzle temperature exceeds fuel's thermal decomposition threshold?

A)Carbon deposit buildup in injector
B)Increased fuel volatility in the tank
C)Reduced exhaust emissions of NOx
D)Decreased engine knocking sensitivity

💡 Explanation

When the injector nozzle significantly heats up, fuel thermal decomposition occurs because of bond breakage, resulting in carbonaceous residue and varnish formation in the fuel injector. Therefore deposit accrual results, rather than altered fuel properties, reduced emissions, or decreased knocking which have alternate root causes.

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