UK Driving Theory Practice Exam

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Ace your UK Driving Theory Test! With our comprehensive practice exams featuring multiple-choice questions, detailed explanations, and helpful hints, you'll have everything you need to pass with confidence. Start your journey to becoming a licensed driver today!

Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

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What is the purpose of catalytic converters?

To improve fuel efficiency
To make the car go faster
to reduce exhaust emissions and is found on the exhaust system
To reduce the noise from the exhaust

The correct answer is: to reduce exhaust emissions and is found on the exhaust system

Catalytic converters are designed to reduce the level of harmful exhaust emissions from a vehicle. They are typically found in the exhaust system and work by catalyzing chemical reactions that convert harmful pollutants into less harmful substances. It is not used to improve fuel efficiency or make the car go faster, as these functions are handled by other components in the engine. Additionally, catalytic converters do not have a direct impact on reducing exhaust noise. Therefore, the purpose of catalytic converters is solely for reducing emissions from a vehicle.