This is an old question that is no longer in use.
Images may be missing and the information may be dated.
Which statement is true regarding catalytic converters?
“The catalytic converter turns [...] into mainly carbon dioxide and water. The carbon dioxide emissions is a problem that can currently only be solved through a reduced fuel consumption.” (Driving Licence Book, 19th Edition, page 225)
This is an example of one of the driving theory questions at Körtkortonline.se. There are three languages: English (free driving licence test), Swedish (free driving licence test) and Arabic (free driving licence test)
More examples of theory questions: