In Serbian vehicle safety and regulations, at what engine RPM should a driver normally upshift to higher gears for optimal fuel efficiency (eco-driving)?
Answer and explanation
Correct answer: C. Between 2,000 and 2,500 RPM
- Step 1: Upshifting early at ~2,000-2,500 RPM keeps the engine in its most efficient operating band, reducing fuel consumption and emissions. Answer: Between 2,000 and 2,500 RPM. Why not the others: the alternative options do not represent statutory provisions under Serbian vehicle safety and technical regulations.
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