In Hungarian road traffic rules, what is the fuel consumption effect of carrying an unused empty roof rack or cargo box?
Answer and explanation
Correct answer: D. Increases aerodynamic drag and raises fuel consumption by up to 10-15%
- Step 1: Roof racks and roof boxes disrupt vehicle aerodynamics, creating significant drag that wastes substantial fuel, especially at highway speeds. Answer: Increases aerodynamic drag and raises fuel consumption by up to 10-15%. Why not the others: Empty roof accessories should be removed when not in use to save fuel.
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