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Which outcome results when air is drawn too slowly across the Venturi of a carbureted engine?

A)Fuel droplets precipitate within inlet manifold
B)Volumetric combustion efficiency greatly increases
C)Exhaust valves experience thermal overload
D)Engine pre-ignition becomes significantly suppressed

💡 Explanation

Fuel precipitates because insufficient airflow causes incomplete atomization, initiating fuel condensation via the mechanism of "flash boiling". Therefore, droplets form, rather than remaining vaporized, because slow flow prevents sufficient pressure drop for complete vaporization to occur.

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