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Difficulty: EasyExhaust and Emissions Systems

Which exhaust system component is specifically designed to chemically convert toxic pollutants, such as carbon monoxide (COCO) and unburned hydrocarbons (HCHC), into harmless carbon dioxide (CO2CO_2) and water vapor (H2OH_2O)?

  1. A
    Muffler
  2. Catalytic converterAnswer
  3. C
    Exhaust manifold
  4. D
    Thermostat

Answer

The catalytic converter is the component that uses chemical reactions to transform harmful exhaust pollutants into non-toxic gases.
The catalytic converter is installed in the exhaust stream between the exhaust manifold and the muffler. Inside, it uses a ceramic structure coated with catalytic materials (such as platinum, palladium, and rhodium) to oxidize carbon monoxide and unburned hydrocarbons into water vapor and carbon dioxide, while reducing nitrogen oxides into nitrogen gas.

Step-by-Step Solution

1
Identify the primary function specified in the question.
The target function is the chemical conversion of harmful emissions (COCO and HCHC) into harmless byproducts (CO2CO_2 and H2OH_2O).
Differentiating chemical emissions control from physical gas routing, thermal management, or sound suppression is essential.
2
Evaluate the functional purpose of standard exhaust system components.
The catalytic converter contains ceramic honeycomb coated with catalysts (such as platinum and palladium) that trigger oxidation and reduction reactions on passing exhaust gases.
Other exhaust parts, such as the manifold (collection) and muffler (noise attenuation), do not alter gas chemistry.

Key Concept

Catalytic Converter Operation and Emission Chemical Reduction
Estimated Time:45s
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Topics

Exhaust and Emissions Systems

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