UK Driving Theory Practice Exam

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Study for the UK Driving Theory Practice Exam. Prepare with detailed questions, hints, and explanations. Get ready for your exam!

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 do unused roof racks do?

Reduce car's speed
Increase fuel efficiency
Waste fuel
Enhance the vehicle's appearance

The correct answer is: Waste fuel

Unused roof racks do not have any effect on a car's speed or fuel efficiency. In fact, having a roof rack attached to a car can actually decrease fuel efficiency due to added weight and wind resistance. While some people may use roof racks solely for aesthetic purposes, leaving them unused does not enhance the vehicle's appearance in any way. The only potential downside of leaving unused roof racks on a car is the waste of fuel that occurs from the added weight.