If the intake filter is plugged on an air pump, what will occur?

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Prepare for the California BAR Smog Technician Test. Review key topics with flashcards and multiple choice questions, each question includes hints and explanations. Get ready to ace your exam!

Multiple Choice

If the intake filter is plugged on an air pump, what will occur?

Explanation:
The air pump adds fresh oxygen to the exhaust to help oxidize CO and hydrocarbons. If the intake filter is plugged, the pump can’t pull air effectively, so no air is injected into the exhaust. Without that extra oxygen, CO and HC aren’t oxidized as they should be, so their levels in the exhaust rise. NOx behavior isn’t improved by this change, but the main effect you’ll see is higher CO and HC due to the lack of air-driven oxidation.

The air pump adds fresh oxygen to the exhaust to help oxidize CO and hydrocarbons. If the intake filter is plugged, the pump can’t pull air effectively, so no air is injected into the exhaust. Without that extra oxygen, CO and HC aren’t oxidized as they should be, so their levels in the exhaust rise. NOx behavior isn’t improved by this change, but the main effect you’ll see is higher CO and HC due to the lack of air-driven oxidation.

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