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Under idling conditions the fuel supply is cut off to reduce the level of ____________

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Under idling conditions the fuel supply is cut off to reduce the level of ____________

(a) CO

(b) CO2

(c) HC

(d) None of the mentioned

This question was posed to me during an online interview.

Asked question is from Exhaust Gas Recirculation in portion Engine Emissions and their Control of IC Engine

1 Answer

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by (65.4k points)

The correct answer is:

(c) HC

Under idling conditions, the fuel supply is often cut off to reduce the level of hydrocarbons (HC) in the exhaust. This helps minimize unburned fuel emissions during periods when the engine is not under load, improving overall emissions control.

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