Practice question

What is the 'Rule of the Lower Gear' (Regla de la Marcha Inferior) when descending steep mountain slopes with a heavy cargo truck?

  1. Always descend in the highest gear available to keep engine RPM low
  2. Descend the slope in the same or lower transmission gear that would be required to climb up that exact same gradient
  3. Descend in neutral with the clutch disengaged
  4. Switch off the transmission and use only handbrakes

Answer: B — Descend the slope in the same or lower transmission gear that would be required to climb up that exact same gradient

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