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Driving theory questions

What does a catalytic converter do?

  • The catalytic converter converts the harmful substances in the petrol into carbon dioxide and water through chemical reactions.
  • 80–95% of the harmful substances disappear.
  • The catalytic converter has a working temperature of 400-600°C, which means it takes a while before it works optimally.

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This is an example of one of the driving theory questions at Körtkortonline.se (also in theory tests in Arabic).

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