Catalytic Converters Quiz

At what temperature does the oxidation process start in early catalytic converters?

• 400°C

• 200°C

• 600°C

• 800°C

What does the oxidation process convert HC to if the oxygen content in the exhaust gases is correct?

• H₂O and CO₂

• CO and NO₂

• H₂O and N₂

• CO₂ and O₂

What does the internal surface of a monolithic converter look like?

• A bundle of drinking straws

• A flat surface

• A series of tubes

• A honeycomb structure

What does the oxidation converter in a three-way converter produce?

• N₂ and O₂

• CO₂ and H₂O

• NOx and CO

• H₂O and N₂

What additional system can some converters be connected to?

• Secondary air system

• Primary air system

• Tertiary air system

• Quaternary air system

What does the extra air in a three-way converter with additional air improve?

• The performance of the oxidation catalyst

• The performance of the reduction catalyst

• The performance of both the oxidation and reduction catalysts

• The performance of the catalytic converter

What is combined with a reduction catalyst on a flat-bed converter to perform a three-way function?

• A secondary air system

• An oxidation catalyst

• A tertiary air system

• A quaternary air system

When does the oxidation process work best?

• When the exhaust is slightly lean

• When the exhaust is slightly rich

• When the exhaust is neutral

• When the exhaust is highly rich

What does the term "three-way" in three-way converter refer to?

• The reduction of three types of emissions

• The increase of three types of emissions

• The combination of three types of catalysts

• The use of three types of air systems

What does the oxygen sensor measure in the exhaust gases?

• CO2 content

• O2 content

• NOx content

• H2O content