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CDifficulty 3/5

Before descending a mountain pass in a lorry, how should the gear be selected to help control speed?

Correct answer

A gear that allows speed control and effective engine braking in those conditions.

Select a gear suitable for the gradient, load, speed and vehicle characteristics under manufacturer instructions, enabling engine braking without exceeding allowable engine speed. The gear used uphill can be a guide but does not guarantee the correct downhill gear in every situation. Do not descend in neutral. Use any auxiliary systems within their limits and supplement with the service brake when needed to maintain control.

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  • Any gear or neutral, provided the service brake is kept pressed.

  • A gear that allows speed control and effective engine braking in those conditions.

  • Always a higher gear than uphill, regardless of gradient or load.

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