Mark one answer
To reduce engine wear
To reduce the risk of fire
To reduce harmful exhaust gases
To reduce fuel consumption
Explanation: Catalytic converters reduce a large percentage of harmful exhaust emissions. They work more efficiently when the engine has reached its normal working temperature.
Category: Safety and your vehicle
References: The Official DVSA Guide to Driving: Section 17
- 1
Sign Up Quickly & Easily 📝
Register with your email and set a secure password in just minutes. Gain full access to all the practice materials. - 2
Complete Your Payment 💳
Make a secure one-time payment to unlock unlimited access to training material, mock tests, AI-powered questions and hazard perception videos. - 3
Start Practicing 🚀
Log in and begin! Take unlimited practice tests, get instant feedback, and master every aspect of your theory test.
easy pricing
Premium Membership
£11.99 /one-off payment
- Complete training course included
- 700+ AI-powered theory test questions
- Official DVSA answers & explanations
- Unlimited mock tests
- 250+ CGI & real-life hazard perception clips
- Progress tracking, mobile-friendly & always up-to-date