In Italian vehicle safety and emergency procedures (Codice della Strada), what is the rule regarding the correct technique to maintain safe speed down long, steep mountain gradients?

Answer and explanation

Correct answer: A. Lower gear for engine braking

  1. Step 1: Engaging lower gears uses engine compression to retard speed, preventing friction overheating and failure of hydraulic wheel brakes. Answer: Lower gear for engine braking. Why not the others: the other options do not conform to vehicle safety standards and emergency regulations under the Codice della Strada.

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