Become a member
Log in
Prov Tests Prov
The Licence Game
The Road Signs Game
Licence theory
The road to your licence
Road signs
Find a traffic school
Gift vouchers

Common theory questions

Which substance in the car's exhaust emissions is not purified by the catalytic converter?

Catalytic converters do not purify or reduce carbon dioxide emissions. The only way to reduce these is by decreasing fuel consumption.